Electronics Manufacturing Technical Articles

Design, Software Manufacturer

Analog FastSPICE Platform Full-Circuit PLL Verification

Jun 30, 2016 | Mentor Graphics

When designing PLLs in nanometer CMOS, it is essential to validate the closed-loop PLL performance metrics with nanometer SPICE accuracy before going to silicon. Transistor-level, closed-loop PLL verification has been impractical due to traditional SPICE and RF simulator performance and capacity limitations. By using Analog FastSPICE, designers dont have to trade accuracy for performance.

Read this white paper to see how AFS:

Delivers closed-loop PLL transistor-level verification
Supports direct jitter measurements
Produces phase noise results correlating within 1-2dB of silicon

...

Publisher: Mentor Graphics

Mentor Graphics

A leader in software solutions for electroncs design, Mentor Graphics is the only EDA company with a total end-to-end solution for design though manufacturing.

Wilsonville, Oregon, USA

A Case Study on Evaluating Manual and Automated Heat Sink Assembly Using FEA and Testing

Jun 23, 2016 | Michael Sumalinog, Jesus Tan, Murad Kurwa; AEG, Flex.

Proper assembly of components is critical in the manufacturing industry as it affects functionality and reliability. In a heat sink assembly, a detailed manual process is often utilized. However, an automated fixture is used whenever applicable.

This paper will illustrate the use of strain gauge testing and Finite Element Analysis (FEA) as a simulation tool to evaluate and optimize the heat sink assembly process by manual and automated methods. Several PCBAs in the production line were subjected to the manual and automated assembly process. Strain gauge testing was performed and FEA models were built and run. Results were compared with the goal of improving the FEA model. The updated FEA model will be used in simulating different conditions in assembly. Proposed improvement solutions to some issues can also be verified through FEA....

Flextronics is a global full-service supplier of a full spectrum of value-added Electronic Manufacturing Services.

Singapore, Singapore

Today's Smaller Cables Require Automated Processing

Jun 21, 2016 | Pete Doyon - VP Product Management, Schleuniger, Inc.

The trends in mobile electronics today are smaller, thinner and lighter. Yet, mobile devices are more powerful than ever. Applications, like wireless internet connections, RFID and Bluetooth, that have become essential in today’s devices, require more complex transmission mechanisms. As a result, manufacturers find themselves faced with the challenge of working with ultra-miniature RF cable assemblies....

Publisher: Schleuniger, Inc.

Schleuniger, Inc.

Schleuniger, Inc. is a leading manufacturer of wire processing equipment. Our innovative automatic and semi-automatic machines are designed to cut, strip, crimp and mark all types of wire and cable.

Manchester, New Hampshire, USA

Vern Solberg - Solberg Technical Consulting

Embedding Passive and Active Components: PCB Design and Fabrication Process Variations

Jun 16, 2016 | Vern Solberg

Embedding components within the PC board structure is not a new concept. Until recently, however, most embedded component PC board applications adapted only passive elements. The early component forming processes relied on resistive inks and films to enable embedding of resistor and capacitors elements. Although these forming methods remain viable, many companies are choosing to place very thin discrete passive components and semiconductor die elements within the PC board layering structure. In addition to improving the products performance, companies have found that by reducing the component population on the PC board's surface, board level assembly is less complex and the PC board can be made smaller, The smaller substrate, even when more complex, often results in lower cost. Although size and cost reductions are significant attributes, the closer coupling of key elements can also contribute to improving functional performance.

This paper focuses on six basic embedded component structure designs described in IPC-7092....

Publisher: Vern Solberg - Solberg Technical Consulting

Vern Solberg is an independent technical consultant based in Saratoga, California specializing in SMT and microelectronics design and manufacturing technology.

Saratoga, California, USA

Consultant

Cable and Harness Manufacturing: Productivity through Flexibility

Jun 06, 2016 | Margaret Bishop (CAMI Research)

Learn how to choose a cable & harness tester that remains relevant as product design changes in addition to providing fast, reliable, accurate results. See how it can improve productivity even beyond the production floor....

Publisher: CAMI Research Inc.

CAMI Research Inc.

CableEye® continuity and HiPot pass/fail & diagnostic Cable & Harness Test Systems w simple scripting, labeling, documentation, cataloging & relay control. Dynamically display continuity, Ω, diodes, IR, dielectric breakdown & more

Acton, Massachusetts, USA

Manufacturer of Assembly Equipment, Test Services

How to Select the Right Conformal Coating Spray for PCB

Jun 06, 2016 | Rana Kalitha

One of the most important steps in PCB assembly is the need for conformal coating for PCB. The process of choosing a conformal coating spray is a complex one as it involves a number of confusing decisions revolving around selections and compromises. ...

Publisher: Sumitron Exports Pvt. Ltd.

Sumitron Exports Pvt. Ltd.

Sumitron is a leading distributor of high quality Equipments, Tools and Materials for Electrical, Electronics, Automobile, Pharmaceutical and Telecom industry in India.

New Delhi, India

Equipment Dealer / Broker, Distributor

Materials Compatibility and Aging for Flux and Cleaner Combination

May 30, 2016 | Kim M. Archuleta, Rochelle Piatt

New engineered cleaning and defluxing agents promise great improvement in cleaning and reliability for electronic assemblies. As complexity grows and dimensions shrink in high reliability electronics, the need for materials compatibility and effectiveness in cleaning and rinsing is vital....

Publisher: Sandia National Laboratories

Sandia National Laboratories

For more than 60 years, Sandia has delivered essential science and technology to resolve the nation's most challenging security issues.

Albuquerque, New Mexico, USA

Characterization of Solder Defects on Package on Packages with AXI Systems for Inspection Quality Improvement

May 30, 2016 | Zhen Feng, Ph. D., David Geiger, Weifeng Liu, Ph. D., Anwar Mohammed, Murad Kurwa, AEG, Flextronics, George Tint Ph. D., Saki America.

As a part of series of studies on X-Ray inspection technology to quantify solder defects in BGA balls, we have conducted inspection of 3 level POP package by using a new AXI that capable of 3D-CT imaging. The new results are compared with the results of earlier AXI measurements. It is found that 3D measurements offer better defect inspection quality, lower false call and escapes....

Flextronics is a global full-service supplier of a full spectrum of value-added Electronic Manufacturing Services.

Singapore, Singapore

Influence of Salt Residues on BGA Head on Pillow (Hip)

May 26, 2016 | J. Servin, P. Gomez, M. Dominguez, A. Aragon

The oxide layers are known as wetting inhibitors in component and PCB metallizations. The oxide acts as barrier that prevent the tin diffusion from happening. Besides, in corrosion studies, the role of salt residues -with Cl ion- on some metals is known as being promoters of oxidation or corrosion. On the other hand, most of corrosion studies with tin metallization are focused mainly on the corrosion resistance of tin alloys, but little has been done respecting to the influence of salts on tin metallization wetting.

In this paper, a series of experiments was carried over to know the influence of specifically NaCl on BGA wetting given Head in Pillow (HiP) as result....

Publisher: Continental Corporation

Continental Corporation

Since 1871, Continental develops intelligent technologies for transporting people and their goods.

Hannover, Germany

Manufacturer of Assembly Material, Adhesives/Dispensing

Ultrathin Fluoropolymer Coatings to Mitigate Damage of Printed Circuit Boards Due to Environmental Exposure

May 19, 2016 | Erik Olson, Molly Smith, Greg Marszalek, Karl Manske

As consumers become more reliant on their handheld electronic devices and take them into new environments, devices are increasingly exposed to situations that can cause failure. In response, the electronics industry is making these devices more resistant to environmental exposures. Printed circuit board assemblies, handheld devices and wearables can benefit from a protective conformal coating to minimize device failures by providing a barrier to environmental exposure and contamination.

Traditional conformal coatings can be applied very thick and often require thermal or UV curing steps that add extra cost and processing time compared to alternative technologies. These coatings, due to their thickness, commonly require time and effort to mask connectors in order to permit electrical conductivity. Ultra-thin fluorochemical coatings, however, can provide excellent protection, are thin enough to not necessarily require component masking and do not necessarily require curing.

In this work, ultra-thin fluoropolymer coatings were tested by internal and industry approved test methods, such as IEC (ingress protection), IPC (conformal coating qualification), and ASTM (flowers-of-sulfur exposure), to determine whether this level of protection and process ease was possible....

Publisher: 3M Company

3M Company

3M's Electronics and Energy segment serves customers in electronics and energy markets, including solutions for dependable, cost-effective, high-performance electronic devices.

St. Paul, Minnesota, USA

New Era in Testing DUT over Temperature

May 13, 2016 | Lior Yosef

The process of manufacturing and qualifying IC's consists of many steps while Temperature forcing systems play a crucial role in the final testing process. These environmental tests assure quality and reliability by stressing the device on one hand as well as helping to characterize and validate it on the other hand (making sure manufacturing outcome meets the design requirements). At later stages the temperature testing can support failure analysis effort and root cause analysis. AS common practice we are dealing with few different kinds of temperature forcing systems: Chambers, Thermal Stream systems and Direct Thermal Head systems. In this article I would like to focus on the practical aspects of utilizing Thermal Stream systems and Direct Thermal Head systems....

Publisher: Mechanical Devices

Mechanical Devices

We develop produce and supply innovative cost effective thermal control units to major Semiconductor Devices Manufacturers to test IC devices -LOW & HIGH Power devices for temp range -65°C to +200°C.

Haifa, Israel

Manufacturer of Assembly Equipment, Other, Test Services, Manufacturer of Test Equipment

Influence of Plating Quality on Reliability of Microvias

May 12, 2016 | Yan Ning, Michael H. Azarian, Michael Pecht

Advances in miniaturized electronic devices have led to the evolution of microvias in high density interconnect (HDI) circuit boards from single-level to stacked structures that intersect multiple HDI layers. Stacked microvias are usually filled with electroplated copper. Challenges for fabricating reliable microvias include creating strong interface between the base of the microvia and the target pad, and generating no voids in the electrodeposited copper structures. Interface delamination is the most common microvia failure due to inferior quality of electroless copper, while microvia fatigue life can be reduced by over 90% as a result of large voids, according to the authors’ finite element analysis and fatigue life prediction. This paper addresses the influence of voids on reliability of microvias, as well as the interface delamination issue. ...

Publisher: CALCE Center for Advanced Life Cycle Engineering

CALCE Center for Advanced Life Cycle Engineering

The largest electronic products research center focused on electronics reliability, is dedicated to providing a knowledge and resource base to support the development of competitive electronic components, products and systems.

College Park, Maryland, USA

Service Provider, Training Provider

How Reshoring Drives Profitability

May 05, 2016 | Michael Ford.

For many years, manufacturing has sought to increase competitiveness by moving off-shore to countries with lower labour costs. Electronic manufacturing services (EMS) companies provided an essential element to make off-shore transfer happen more quickly, offering further cost reduction opportunities from load balancing. Fierce arguments were put forward to protect the loss of local jobs, although the result was, in almost all cases, inevitable. Today, however, the whole market of PCBbased electronics products has changed significantly. The "pros" of off-shoring are no longer what they once were, and the "cons" are becoming more significant because off-shore manufacturing can no longer satisfy the needs of the market.

In this paper, we expose the real costs of off-shore manufacturing, and put labour cost differentials into perspective. We demonstrate how practically, using existing technologies, re-shored manufacturing can yield better business return, either for an OEM, or through EMS providers.

...

Publisher: Mentor Graphics

Mentor Graphics

A leader in software solutions for electroncs design, Mentor Graphics is the only EDA company with a total end-to-end solution for design though manufacturing.

Wilsonville, Oregon, USA

Design, Software Manufacturer

Control of the Underfill of Surface Mount Assemblies by Non-Destructive Techniques

Apr 28, 2016 | Julien Perraud, Arnaud Grivon.

Underfilling is a long-standing process issued from the micro-electronics that can enhance the robustness and the reliability of first or second-level interconnects for a variety of electronic applications. Its usage is currently spreading across the industry fueled by the decreasing reliability margins induced by the miniaturization and interconnect pitch reduction. (...)

This paper will address the control of surface mount under filled assemblies, focusing on applicable inspection techniques and possible options to overcome their limitations....

Publisher: THALES

THALES

A French multinational company acting in areas such as defense, aerospace, airlines security and safety, information technology, and transportation.

Neuilly-sur-Seine, France

3D Assembly Process a Look at Today and Tomorrow

Apr 21, 2016 | David Geiger, Georgie Thein; AEG, Flextronics International Inc.

The world of electronics continues to increase functional densities on products. One of the ways to increase density of a product is to utilize more of the 3 dimensional spaces available. Traditional printed circuit boards utilize the x/y plane and many miniaturization techniques apply to the x/y space savings, such as smaller components, finer pitches, and closer component to component distances.

This paper will explore the evolution of 3D assembly techniques, starting from flexible circuit technology, cavity assembly, embedded technology, 3 dimensional surface mount assembly, etc....

Flextronics is a global full-service supplier of a full spectrum of value-added Electronic Manufacturing Services.

Singapore, Singapore

Repair/Rework, Test Services, Service Provider, Training Provider

Causes and Costs of No Fault Found Events

Apr 14, 2016 | Louis Y. Ungar

A system level test, usually built-in test (BIT), determines that one or more subsystems are faulty. These subsystems sent to the depot or factory repair facility, called units under test (UUTs) often pass that test, an event we call No-Fault-Found (NFF). With more-and more electronics monitored by BIT, it is more likely that an intermittent glitch will trigger a call for a maintenance action resulting in NFF. NFFs are often confused with false alarm (FA), cannot duplicate (CNDs)or retest OK (RTOK) events. NFFs at the depot are caused by FAs, CNDs, RTOKs as well as a number of other complications. Attempting to repair NFF scan waste precious resources, compromise confidence in the product, create customer dissatisfaction, and the repair quality remains a mystery. The problem is compounded by previous work showing that most failure indications calling for repair action at the system level are invalid. NFFs can be caused by real failures or may be a result of system level false alarms. Understanding the cause of the problem may help us distinguish between units under test (UUTs) that we can repair and those that we cannot. In calculating the true cost of repair we must account for wasted effort in attempting to repair unrepairable UUTs.

This paper will shed some light on this trade-off. Finally, we will explore approaches for dealing with the NFF issue in a cost effective manner....

Publisher: A.T.E. Solutions, Inc.

A.T.E. Solutions, Inc.

The leading Test, ATE and Testability consulting and educational firm, offering various test related courses. Maintains the BestTest Directory, a test community knowledge base. Publishes The BestTest eNewsletter.

Los Angeles, California, USA

Streamlining PCB Assembly and Test NPI with Shared Component Libraries

Apr 08, 2016 | Julian Coates

PCB assembly designs become more complex year-on-year, yet early-stage form/fit compliance verification of all designed-in components to the intended manufacturing processes remains a challenge. So long as librarians at the design and manufacturing levels continue to maintain their own local standards for component representation, there is no common representation in the design-to-manufacturing phase of the product lifecycle that can provide the basis for transfer of manufacturing process rules to the design level. A comprehensive methodology must be implemented for all component types, not just the minority which happen to conform to formal packaging standards, to successfully left-shift assembly and test DFM analysis to the design level and thus compress NPI cycle times.(...)

This paper will demonstrate the technological components of the working solution: the logic for deriving repeatable and standardized package and pin classifications from a common source of component physical-model content, the method for associating DFA and DFT rules to those classifications, and the transfer of those rules to separate DFM and NPI analysis tools elsewhere in the design-through-manufacturing chain resulting in a consistent DFM process across multiple design and manufacturing organizations....

Publisher: Mentor Graphics

Mentor Graphics

A leader in software solutions for electroncs design, Mentor Graphics is the only EDA company with a total end-to-end solution for design though manufacturing.

Wilsonville, Oregon, USA

Design, Software Manufacturer

EMI-Caused EOS Sources in Automated Equipment

Mar 31, 2016 | Vladimir Kraz

Electrical overstress causes damage to sensitive components, including latent damage. A significant source of EOS is high-frequency noise in automated manufacturing equipment. This paper analyses sources of such noise, how it affects components and how to mitigate this problem....

Publisher: OnFILTER, Inc.

OnFILTER, Inc.

Reduce electrical overstress (EOS) with our EMI filters for soldering, power, ground and servo motors. EMI filters improve equipment up-time and reliability and reduce test problems.

Santa Cruz, California, USA

Other, OEM

Cable and Harness Manufacturing: Five Qs to ask when selecting a Cable and Harness Tester ...

Mar 25, 2016 | Margaret Bishop (CAMI Research)

Ready to purchase a new tester? Interested in improving productivity & quality? Ask these technical questions of your potential supplier....

Publisher: CAMI Research Inc.

CAMI Research Inc.

Acton, Massachusetts, USA

Manufacturer of Assembly Equipment, Test Services

High Frequency DK and DF Test Methods Comparison High Density Packaging User Group (HDP) Project

Mar 24, 2016 | Karl Sauter; Oracle Corporation, Joe Smetana; Alcatel-Lucent

Today's Electronic Industry is changing at a high pace. The root causes are manifold. So world population is growing up to eight billions and gives new challenges in terms of urbanization, mobility and connectivity. Consequently, there will raise up a lot of new business models for the electronic industry. Connectivity will take a large influence on our lives. Concepts like Industry 4.0, internet of things, M2M communication, smart homes or communication in or to cars are growing up. All these applications are based on the same demanding requirement – a high amount of data and increased data transfer rate. These arguments bring up large challenges to the Printed Circuit Board (PCB) design and manufacturing.

This paper investigates the impact of different PCB manufacturing technologies and their relation to their high frequency behavior. In the course of the paper a brief overview of PCB manufacturing capabilities is be presented. Moreover, signal losses in terms of frequency, design, manufacturing processes, and substrate materials are investigated. The aim of this paper is, to develop a concept to use materials in combination with optimized PCB manufacturing processes, which allows a significant reduction of losses and increased signal quality....

Publisher: Alcatel-Lucent

Alcatel-Lucent

Alcatel-Lucent- Enterprise Business Group is a world leader in the delivery of communications solutions for businesses, including contact center software, small/medium business telephony and IP addres

Calabasas, California, USA

Service Provider

Enabling High-Speed Printing Using Low-Cost Materials: Process Stability is Paramount

Mar 17, 2016 | Michael L. Cieslinski, Brent A. Fischthal

The rapid growth of electronic devices across the globe is driving manufacturers to enhance high-speed mass production techniques in the PCB assembly arena. As manufacturers drive to reduce costs while maximizing production by expanding facilities, updating automation equipment, or implementing lean six sigma techniques, the potential to build scrap product or rework printed circuit boards increases dramatically.

Manufacturers have two general paths to reduce the costs of high-speed printed circuit board assembly production. The first path is to reduce cost by focusing on high quality printing and mounting. The other, increasingly popular option is to utilize low-cost materials. In either case, the baseline must provide a consistent high-speed solder paste printing method, which considers the fill, snap-off, and cleaning processes.

Building on our expertise and testing, this paper will highlight the two trains of thought with specific focus on how low-cost materials affect print performance. It will also explore technologies, which can help provide stable, high-speed screen printing....

Publisher: Panasonic Factory Solutions Company of America (PFSA)

Panasonic Factory Solutions Company of America (PFSA)

PFSA develops and supports innovative manufacturing automation equipment, processes and solutions around the core of electronic assembly, microelectronic, software and circuit manufacturing

Rolling Meadows, Illinois, USA

Manufacturer of Assembly Equipment, Pick and Place, OEM

Acceptance Testing Of Low-Ag Reflow Solder Alloys

Mar 10, 2016 | Kris Troxel, Aileen Allen, Elizabeth Elias Benedetto, Rahul Joshi

Since the implementation of the European Union RoHS directive in 2006, the electronics industry has seen an expansion of available low-silver lead (Pb)-free1 alloys for wave soldering, miniwave rework, BGA and CSP solder balls, and, more recently, solder pastes for mass reflow. The risks associated with the higher processing temperatures of these low-silver (Ag between 0-3 wt%) solder alloys, such as potential laminate or component damage, increased copper dissolution, and reduced thermal process windows may present manufacturing challenges and possible field reliability risks for original equipment manufacturers (OEMs). In order to take advantage of potential cost reduction opportunities afforded by these new alloys, while mitigating manufacturing and reliability risks, the company has defined test protocols [1-4] that can be used for assessing new Sn-Ag-Cu(SAC), Sn-Ag, and Sn-Cu alloys for general use in electronics.

This paper describes initial test results for low-silver alloys using these solder paste alloy assessment protocols for BGAs and leaded components, and the impact of the alloys on printed circuit assembly process windows....

Publisher: HP Inc.

HP Inc.

HP Inc. creates technology that makes life better for everyone, everywhere. Through our portfolio of printers, PCs, mobile devices, solutions, and services, we engineer experiences that amaze.

Palo Alto, California, USA

Manufacturer of Assembly Material, Components/Substrates

Nanocopper Based Paste for Solid Copper Via Fill

Mar 03, 2016 | David Ciufo, Sujatha Ramanujan, Janet Heyen, Michael Carmody; Intrinsiq Materials, Sunny Patel; Candor Industries.

This paper discusses a nano copper based paste for use in via filling. The company manufactures nano copper and disperses the coated nano copper into a paste in combination with micron copper. The resultant paste is injected or fills a via. The via is subsequently sintered by means of photonic sintering, or by heat in a reducing environment. The process will be accomplished in under an hour and results in filled solid copper vias....

Publisher: Intrinsiq Materials Inc.

Intrinsiq Materials Inc.

Intrinsiq Materials manufactures a variety of electronic ink, including screen-printable, and inkjetable copper ink, a silicon ink jet, and a nickel ink jet.

Rochester, New York, USA

ph Neutral Cleaning Agents - Market Expectation & Field Performance

Feb 25, 2016 | Umut Tosun, Jigar Patel, Kalyan Nukula, Fernando Gazcon, ZESTRON America

With regard to precision cleaning applications within electronics manufacturing, pH neutral product development was a major breakthrough in recent years. The impetus for this development resulted from changes with regard to solder paste formulations and resulting assembly processes.

The greater use of lead-free solder paste and the required higher reflow profiles have resulted in even more difficult to remove burnt-in flux residues. Coupled with increases in component density, larger component packages, higher lead counts, finer lead spacing, and lower standoff distances, effective cleaning is greatly challenged. The aqueous alkaline based cleaning agents can effectively remove these flux residues, however, the process often requires an increase in wash temperature and exposure time, chemical concentration, and mechanical energy. Although an efficient and effective cleaning process can be developed, oftentimes, the required operating parameters present a new set of challenges with regard to material compatibility.

Since their introduction, the newly developed pH neutral formulations have proven to be capable not only of removing these difficult post reflow residues from complex board geometries, but do so without affecting material compatibility of sensitive components. Additionally, they perform at low concentration levels. This study reviews the performance of pH neutral cleaning agents as compared to alkaline cleaning agent alternatives and includes field data demonstrating their effectiveness with regard to material compatibility and cleaning performance....

Publisher: ZESTRON Americas

ZESTRON Americas

The globally leading provider of high precision cleaning products, services and training solutions in the electronics and semiconductor manufacturing industries.

Manassas, Virginia, USA

Cleaning, Test Services, Training Provider

Sample Preparation For Mitigating Tin Whiskers In Alternative Lead-Free Alloys

Feb 18, 2016 | Mehran Maalekian, Karl Seelig, Timothy O'Neill

As lead-free alloys shift into high reliability electronics, the issue of tin whisker growth remains a primary concern among those in the industry. Current research shows that there is no perfect alloy for all cases of electronic usage. Industry leaders and researchers continue to study and search for a lead free alloy that is able to withstand harsh environments while maintaining high reliability....

Publisher: AIM Solder

AIM Solder

AIM is a leading global manufacturer of tin-lead and lead-free solder assembly materials for the electronics industry.

Montreal, Quebec, Canada

Manufacturer of Assembly Material, Soldering

Effective Methods to Get Volatile Compounds Out of Reflow Process

Feb 11, 2016 | Gerjan Diepstraten

Although reflow ovens may not have been dramatically changed during the last decade the reflow process changes step by step. With the introduction of lead-free soldering not only operation temperatures increased, but also the chemistry of the solder paste was modified to meet the higher thermal requirements. Miniaturization is a second factor that impacts the reflow process. The density on the assembly is increasing where solder paste deposit volumes decreases due to smaller pad and component dimensions. Pick and place machines can handle more components and to meet this high through put some SMD lines are equipped with dual lane conveyors, doubling solder paste consumption. With the introduction of pin in paste to solder through hole components contamination of the oven increased due to dripping of the paste....

Publisher: Vitronics Soltec

Vitronics Soltec

Global manufacturer of XPM Reflow Ovens, ZEVA Selective Soldering and Delta Wave Soldering Equipment.

Camdenton, Missouri, USA

Manufacturer of Assembly Equipment, Soldering, Selective Soldering

Make the Right Design Choices in Load Switching and Simulation in a High Current and Mechatronic Functional Test

Feb 04, 2016 | Derek Ong, Lok Teng Kee, Chuah Rhun Chia

In a typical mechatronic manufacturing functional test setup, actual load simulations are usually done by connecting the DUT outputs to power or ground in order to establish either a high or low side driver. Each output is connected with different load and the test will either be sequential or concurrent. At lower power levels, these can usually be managed with general purpose switches. However, when it comes to higher power levels of currents more than 5 amps, such switching and loading might pose a greater challenge. Furthermore, critically in the manufacturing line, the tradeoff between cost and test time would have a great influence on the test strategy.

This paper will present some key points to design a cost effective high power switching and load management solution....

Publisher: Keysight Technologies

Keysight Technologies

A global electronic measurement technology and market leader helping to transform its customers' measurement experience through innovations in wireless, modular, and software solutions.

Santa Rosa, California, USA

Inspection, Test Services

Dispelling the Black Magic of Solder Paste

Jan 21, 2016 | Tony Lentz

Solder paste has long been viewed as "black magic". This "black magic" can easily be dispelled through a solder paste evaluation. Unfortunately, solder paste evaluation can be a challenge for electronic assemblers. Interrupting the production schedule to perform an evaluation is usually the first hurdle. Choosing the solder paste properties to test is simple, but testing for these properties can be difficult. Special equipment or materials may be required depending upon the tests that are chosen. Once the testing is complete, how does one make the decision to choose a solder paste? Is the decision based on gut feel or hard data?

This paper presents a process for evaluating solder pastes using a variety of methods. These methods are quick to run and are challenging, revealing the strengths and weaknesses of solder pastes. Methods detailed in this paper include: print volume, stencil life, response to pause, open time, tack force over time, wetting, solder balling, graping, voiding, accelerated aging, and others....

Publisher: FCT ASSEMBLY, INC.

FCT ASSEMBLY, INC.

With numerous facilities in the United States, we are one of the electronics industry's leading manufacturers of lead-free solder products, superior quality stencils, and precision cut parts.

Greeley, Colorado, USA

Manufacturer of Assembly Material, Soldering

A Low Cost Manufacturing Solution - Low Temperature Super-Fast Cure and Flow Reworkable Underfill

Jan 12, 2016 | Dr. Mary Liu and Dr. Wusheng Yin

In order to meet the increasing demand of device miniaturization, high speed, more memory, more function, low cost, and more flexibility in device design and manufacturing chain, underfilling has increasingly become an essential process for the good reliability of electronic devices. Filled capillary underfill has been selected for used in package-level where there is large thermal stress caused by CTE mismatch issue, but the underfill is usually not reworkable. Unfilled capillary underfill has been used for board-level application such as BGA/CSP, POP, WL-CSP where there is need for mechanical shock resistance, the underfill is usually reworkable....

Manufacturer of Assembly Material, Adhesives/Dispensing

Yincae Advanced Materials, LLC is a developer, manufacturer, and supplier of high performance coatings, adhesives, electronic and optoelectronic materials.

Albany, New York, USA

A Room Temperature Stable and Jetable Solder Joint Encapsulant Adhesive - Capillary Underfill Replacement

Jan 12, 2016 | Dr. Mary Liu and Dr. Wusheng Yin

With the increasing demand of device miniaturization, high speed, more memory, more function, low cost, and more flexibility in device design and manufacturing chain, YINCAE has published a white paper on a first individual solder joint encapsulant which can eliminate underfilling process with at least five times solder joint increase and provide more flexibility for fine pitch and high density application. In order to meet the demand of manufacturing of high speed and low cost, YINCAE has invented a room temperature stable and jettable solder joint encapsulant adhesive – SMT 266. The invention of SMT 266 has allowed our customers to have more flexibility in their high-speed production line such as worry free on the work life of adhesive and workable jetting process....

Manufacturer of Assembly Material, Adhesives/Dispensing

Yincae Advanced Materials, LLC is a developer, manufacturer, and supplier of high performance coatings, adhesives, electronic and optoelectronic materials.

Albany, New York, USA

A Low Temperature Solder Joint Encapsulant for Sn/Bi Applications

Jan 12, 2016 | Dr. Mary Liu and Dr. Wusheng Yin

The electronic industry is currently very interested in low temperature soldering processes such as using Sn/Bi alloy to improve process yield, eliminate the head-in-pillow effect, and enhance rework yield. However, Sn/Bi alloy is not strong enough to replace lead-free (SAC) and eutectic Sn/Pb alloys in most applications. In order to improve the strength of Sn/Bi solder joints, enhance mechanical performance, and improve reliability properties such as thermal cycling performance of soldered electronic devices, YINCAE has developed a low temperature solder joint encapsulant for Sn/Bi soldering applications. This low temperature solder joint encapsulant can be dipped, dispensed, or printed. After reflow with Sn/Bi solder paste or alloy, solder joint encapsulant encapsulates the solder joint. As a result, the strength of solder joints is enhanced by several times, and thermal cycling performance is significantly improved. All details will be discussed in this paper....

Manufacturer of Assembly Material, Adhesives/Dispensing

Yincae Advanced Materials, LLC is a developer, manufacturer, and supplier of high performance coatings, adhesives, electronic and optoelectronic materials.

Albany, New York, USA

Solderable Anisotropic Conductive Adhesives for 3D Package Applications

Jan 12, 2016 | Dr. Mary Liu and Dr. Wusheng Yin

3D packaging has recently become very attractive because it can provide more flexibility in device design and supply chain, reduce the gap between silicon die and organic substrate, help miniaturize devices and meet the demand of high speed, provide more memory, more function and low cost. With the advancement of 3D packaging, the bump height is now down from 80μ to 10μ. When the bump diameter is 20-40μ and height 10μ, the process and reliability are obvious issues. It is well known that underfill can enhance the reliability for regular flip chip, however underfill won’t help assembly process. In order to resolve some difficulties that 3D packaging faces, YINCAE Advanced Materials, LLC has developed solderable anisotropic conductive adhesives for 3D package applications. In this paper we will discuss the assembly process and reliability in detail....

Manufacturer of Assembly Material, Adhesives/Dispensing

Yincae Advanced Materials, LLC is a developer, manufacturer, and supplier of high performance coatings, adhesives, electronic and optoelectronic materials.

Albany, New York, USA

An Innovative Reliability Solution to Interconnect of Flexible/Rigid Substrates

Jan 12, 2016 | Dr. Mary Liu and Dr. Wusheng Yin

With the pitch size of interconnect getting finer and finer, the bonding strength between flexible and rigid (e.g. PCB, ceramic) substrates becomes a serious issue because it is not strong enough to meet the customer’s requirement. Capillary underfill has been used to enhance the bonding strength between flexible and rigid substrates, but the enhancement is very limited, particularly for high temperature application. The bonding strength of underfilled flexible/rigid interconnect is dramatically decreased after being used at 180◦C, and the interconnects are weakened by the internal stress caused by the expansion of underfill at high temperatures. In order to resolve reliability issues of the interconnect between flexible/rigid substrates, solder joint encapsulant was implemented into the thermal compression bonding process, which was used to manufacture the interconnect between flexible/rigid substrates. Compared to the traditional process, the strength of the interconnect was doubled and the reliability was significantly improved in high temperature application....

Manufacturer of Assembly Material, Adhesives/Dispensing

Yincae Advanced Materials, LLC is a developer, manufacturer, and supplier of high performance coatings, adhesives, electronic and optoelectronic materials.

Albany, New York, USA

Solder Joint Encapsulant Adhesive - LGA High Reliability And Low Cost Assembly Solution

Jan 12, 2016 | Dr. Mary Liu and Dr. Wusheng Yin

More and more Land Grid Array (LGA) components are being used in electronic devices such as smartphones, tablets and computers. In order to enhance LGA mechanical strength and reliability, capillary flow underfill is used to improve reliability. However, due to the small gap, it is difficult for capillary underfill to flow into the LGA at SMT level. Due to cost considerations, there are usually no pre-heating underfill or cleaning flux residue processes at the SMT assembly line. YINCAE solder joint encapsulant SMT256 has been successfully used with solder paste for LGA assembly. Solder joint encapsulant is used in in-line LGA soldering process with enhanced reliability. It eliminates the underfilling process and provides excellent reworkability. The shear st rength of solder joint is stronger than that of underfilled components. The thermal cycling performance using solder joint encapsulant is much better than that using underfill. Bottom IC of POP has been studied for further understanding of LGA assembly process parameters. All details such as assembly process, drop test and thermal cycling test will be discussed in this paper....

Manufacturer of Assembly Material, Adhesives/Dispensing

Yincae Advanced Materials, LLC is a developer, manufacturer, and supplier of high performance coatings, adhesives, electronic and optoelectronic materials.

Albany, New York, USA

The Future of Solder Joint Encapsulant

Jan 08, 2016 | Dr. Mary Liu and Dr. Wusheng Yin

Solder joint encapsulant adhesives have been successfully used to enhance the strength of solder joints and improve thermal cycling as well as drop performance in finished products. The use of solder joint encapsulant adhesives can eliminate the need for underfill materials and the underfill process altogether, thus simplifying rework, which results in a lower cost of ownership.

Solder joint encapsulant adhesives include: low temperature and high temperature solder joint encapsulant adhesives, and their derivatives. Each solder joint encapsulant adhesive has: unfilled and filled solder joint encapsulant adhesives, and solder joint encapsulant paste. Each solder joint encapsulant product has been designed for different applications. In this paper, we are going to discuss the details and future of solder joint encapsulant adhesives. ...

Manufacturer of Assembly Material, Adhesives/Dispensing

Yincae Advanced Materials, LLC is a developer, manufacturer, and supplier of high performance coatings, adhesives, electronic and optoelectronic materials.

Albany, New York, USA

Effect on Microwave Plasma Surface Treatment for Improved Adhesion Strenght of Direct Copper Plating on Polytetrafluoroethylene (PTFE)

Jan 07, 2016 | Akira Takeuchi, Takahiro Kurahashi, Kyosuke Takeda

The purpose of this study is to investigate the effect of plasma surface modification to improve adhesion strength between polytetrafluoroethylene (PTFE) and electroless copper plating. PTFE is widely used in many industries because of its unique electrical, thermal, and mechanical characteristics. However, because of its low surface energy, it is difficult to acquire enough adhesion strength between PTFE and other substances without surface modification. Plasma is well known as one of the surface modification techniques that improve adhesion strength....

Publisher: Nissin Corporation

Nissin Corporation

Nissin supplies electron element materials, anisotropic conductive films, direct-current power supply systems, uninterruptible power supplies.

Nishinomiya, Japan

Study on Solder Joint Reliability of Fine Pitch CSP

Dec 31, 2015 | Yong Hill Liang, Hank Mao, YongGang Yan, Jindong (King) Lee; AEG, Flextronics International.

Today's consumer electronic product are characterized by miniatuization, portability and light weight with high performance, especially for 3G mobile products. In the future more fine pitch CSPs (0.4mm) component will be required. However, the product reliability has been a big challenge with the fine pitch CSP. Firstly, the fine pitch CSPs are with smaller solder balls of 0.25mm diameter or even smaller. The small solder ball and pad size do weaken the solder connection and the adhesion of the pad and substrate, thus the pad will peel off easily from the PCB substrate. In addition, miniature solder joint reduce the strength during mechanical vibration, thermal shock, fatigue failure, etc. Secondly, applying sufficient solder paste evenly on the small pad of the CSP is difficult because stencil opening is only 0.25mm or less. This issue can be solved using the high end type of stencil such as Electroforming which will increase the cost....

Flextronics is a global full-service supplier of a full spectrum of value-added Electronic Manufacturing Services.

Singapore, Singapore

PCB Fabrication Processes and Their Effects on Fine Copper Barrel Cracks

Dec 23, 2015 | Edward Arthur, Charles Busa, Melissa Durfee, Chad Gibson, Wade Goldman P.E.; Raytheon Company, Space and Airborne Systems, The Charles Stark Draper Laboratory, Inc., Raytheon Company, Integrated Defense Systems.

The onset of copper barrel cracks is typically induced by the presence of manufacturing defects. In the absence of discernible manufacturing defects, the causes of copper barrel cracks in printed circuit board (PCB) plated through holes is not well understood. Accordingly, there is a need to determine what affects the onset of barrel cracks and then control those causes to mitigate their initiation.

The objective of this research is to conduct a design of experiment (DOE) to determine if there is a relationship between PCB fabrication processes and the prevalence of fine barrel cracks. The test vehicle used will be a 16-layer epoxy-based PCB that has two different sized plated through holes as well as buried vias....

Publisher: Raytheon

Raytheon

The Raytheon Company is a major American defense contractor and industrial corporation with core manufacturing concentrations in weapons and military and commercial electronics.

Waltham, Massachusetts, USA

Agilent Technologies, Inc.

Good Product Quality Comes From Good Design for Test Strategies

Dec 17, 2015 | Adrian Cheong

Product quality can be improved through proper application of design for test (DFT) strategies. With today's shrinking product sizes and increasing functionality, it is difficult to get good test coverage of loaded printed circuit boards due to the loss of test access. Advances in test techniques, such as boundary scan, help to recover this loss of test coverage. However, many of these test techniques need to be designed into the product to be effective.

This paper will discuss how to maximize the benefits of boundary scan test, including specific examples of how designers should select the right component, connect multiple boundary scan components in chains, add test access to the boundary scan TAP ports, etc. A discussion of DFT guidelines for PCB layout designers is also included. Finally, this paper will include a description of some advanced test methods used in in-circuit tests, such as vectorless test and special probing methods, which are implemented to improve test coverage on printed circuit boards with limited test access....

Publisher: Agilent Technologies, Inc.

World's premier measurement company, providing the critical tools and technologies that sense, measure, and interpret the physical and biological world.

Loveland, Colorado, USA

Manufacturer of Assembly Equipment

Looking Forward - Manufacturing Execution Systems for SME’s

Dec 14, 2015 | Pete Doyon, VP Product Management, Schleuniger, Inc.

A Manufacturing Execution System (MES) is a software program that manages and monitors production work in a factory. The MES controls and monitors all manufacturing data in real time, so there is no guesswork as to the status of any given job, machine, operator, etc. The focus is on short-interval scheduling (shift or day) with an emphasis on optimizing the distribution of work orders. Larger manufacturers have employed MES’s for years but many small to medium sized enterprises (SME’s) have yet to adopt such systems. The benefits of using an MES are many. Looking forward, I predict that even the smallest manufacturing companies will employ MES systems in the future....

Publisher: Schleuniger, Inc.

Schleuniger, Inc.

Schleuniger, Inc. is a leading manufacturer of wire processing equipment. Our innovative automatic and semi-automatic machines are designed to cut, strip, crimp and mark all types of wire and cable.

Manchester, New Hampshire, USA