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SMTnet Express, November 30, 2023, Subscribers: 25,209, Companies: 11,953, Users: 28,522

█ Electronics Manufacturing Technical Articles

Cracks in ceramic chip capacitors can be introduced at any process step during surface mount assembly. Thermal shock has become a "pat" answer for all of these cracks, but about 75 to 80% originate from other sources. These sources include ...

Credits: AVX Corporation

Anisotropic Grain Growth And Crack Propagation In Eutectic Microstructure Under Cyclic Temperature Annealing In Flip-Chip SnPb Composite Solder Joints/a>

For high-density electronic packaging,the application of flip-chip solder joints has been well received in the microelectronics industry. High-lead(Pb) solders such as Sn5Pb95 are presently granted immunity from the RoHS requirements for their use in high-end flip-chip devices, especially in military applications. In flip-chip technology for consumer electronic products ...

Credits: National Chiao Tung University

Avoidance of Ceramic-Substrate-Based LED Chip Cracking Induced by PCB Bending or Flexing

Printed circuit board (PCB) bending and/or flexing is an unavoidable phenomenon that is known to exist and is easily encountered during electronic board assembly processes. PCB bending and/or flexing is the fundamental source of tensile stress induced on the electronic components on the board assembly. For more brittle components, like ceramic-based electronic components, micro-cracks can be induced, which can eventually lead to a fatal failure of the components. For this reason, many standards organizations throughout the world specify the methods under which electronic board assemblies must be tested to ensure their robustness, sometimes as a pre-condition to more rigorous environmental tests such as thermal cycling or thermal shock.

Credit: Cree Lighting

Effect of PCB cracks on thermal cycling reliability of passive microelectronic components with single-grained solder joints

Lead-free tin-based solder joints often have a single-grained structure with random orientation and highly anisotropic properties. These alloys are typically stiffer than lead-based solders, hence transfer more stress to printed circuit boards (PCBs) during thermal cycling. This may lead to cracking of the PCB laminate close to the solder joints, which could increase the PCB flexibility, alleviate strain on the solder joints, and thereby enhance the solder fatigue life. If this happens during accelerated thermal cycling it may result in overestimating the lifetime of solder joints in field conditions. In this study, the grain structure of SAC305 solder joints connecting ceramic resistors to PCBs was studied using polarized light microscopy and was found to be mostly single-grained. After thermal cycling, cracks were observed in the PCB under the solder joints. These cracks were likely formed at the early stages of thermal cycling prior to damage initiation in the solder. A finite element model incorporating temperature-dependent anisotropic thermal and mechanical properties of single-grained solder joints is developed to study these observations in detail. The model is able to predict the location of damage initiation in the PCB and the solder joints of ceramic resistors with reasonable accuracy. It also shows that the PCB cracks of even very small lengths may significantly reduce accumulated creep strain and creep work in the solder joints. The proposed model is also able to evaluate the influence of solder anisotropy on damage evolution in the neighbouring (opposite) solder joints of a ceramic resistor.

Credit: Research Institutes of Sweden

Solder Crack Counter Measures

This page introduces major causes and countermeasures of solder crack in MLCCs (Multilayer Ceramic Chip Capacitors). Major causes of solder cracks Solder cracks on MLCCs developed from severe usage conditions after going on the market and during manufacturing processes such as soldering. Applications and boards that specially require solder crack countermeasures Solder cracks occur mainly because of thermal fatigue due to thermal shock or temperature cycles or the use of lead-free solder, which is hard and fragile.

Credit: TDK - Lambda Americas

RESULTS of Searches for related keywords - "crack" (961)

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█ Printed Circuit Board Assembly & PCB Design Forum

Hot Melt Glue Application for PCBA Components -- Dear Team, Am looking for better alternate for Hand Held Glue Gun for Hot melt glue application for the components in the PCBAs. Specifically for Capacitor base and Solder joints of Wires soldered to PCBA. Expecting creative and simple solution for this specific process. Thanks for all your support -Vijai

Dek Horizon Error -- We have just powered the printer on and get the following error? Anyone seen this before? DEK_CSS Service check. Timed out. Check your system configuration and restart.

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█ SMT, PCB Electronics Assembly Manufacturing Industry News

I.C.T Highlights from Productronica 2023 As a leading manufacturer of complete SMT assembly equipment in the electronics manufacturing industry, I.C.T proudly participated in productronica 2023--the world's premier trade fair for showcasing cutting-edge technologies and solutions in electronics production. Held every two years in Munich, this global event serves as a nexus for industry professionals, offering profound insights into emerging trends through forums and live demonstrations.... I.C.T ( Dongguan Intercontinental Technology Co., Ltd. )
SMTA Releases Second Batch of Training Resources Donated by Bob Willis The Surface Mount Technology Association (SMTA) announces the release of several more webinars, photo libraries, and poster sets as part of a generous donation from renowned industry expert, Bob Willis.... Surface Mount Technology Association (SMTA)

North American EMS Industry down 7.4 Percent in October IPC releases EMS industry results for October 2023... Association Connecting Electronics Industries (IPC)

ADD YOUR NEWS...

█ SMT / PCB Products & Services

NEW SMT / PCB EQUIPMENT & SERVICES - For Sale

PCB SOFTWARE

ProntoSELECTIVE-SOLDERING

Unisoft

PCB ASSEMBLY

PCB Fab & Assembly

Imagineering

PCB REFLOW OVEN

Flux-Free Formic Acid Reflow Oven

Heller

PCB COATING

SimpleCoat Selective Conformal Coating

GPD Global

Inspection

Dongguan I.C.T AOI Solution

Dongguan I.C.T

SELECTIVE SOLDERING

Pillarhouse Jade Handex

Pillarhouse USA

PCB INSPECTION

MV-6e FIVE CAMERA In-Line AOI System

Mirtec

VIEW MORE NEW PRODUCTS...

█ SMT / PCB Assembly Equipment Auctions

AUCTION | ONLINE AUCTION DAY 1 | AURORA Lichtwerke GmbH - Eichstätt, Germany

AUCTIONEER | Maynards Europe GmbH

TYPE | Online Auction

FEATURING | ONLINE AUCTION DAY 1

LOCATION | AURORA Lichtwerke GmbH - Eichstatt, Germany

SCHEDULE | Fri, Oct 27 to Wed, Nov 29, 2023 - EXTENDED!!!

Auction Opening | Fri, Oct 27, 2023, 4:00 AM

Auction Closing | Wed, Nov 29, 2023, 4:00 AM - EXTENDED!!!

DESCRIPTION | Welcome to our auction! We have an exciting array of production equipment for sale, including cutting-edge LED, lamp, and halogen manufacturing lines. You'll find state-of-the-art SMD assembly lines, R&D equipment, and a wealth of laboratory test and measurement tools, just waiting for new owners. This is a golden opportunity to acquire top-quality equipment to enhance your manufacturing capabilities or set up a new production line. Sale in conjunction with Gordon Brothers.

AUCTION | ONLINE AUCTION DAY 2 | AURORA Lichtwerke GmbH - Eichstätt, Germany

AUCTIONEER | Maynards Europe GmbH

TYPE | Online Auction

FEATURING | ONLINE AUCTION DAY 2

LOCATION | AURORA Lichtwerke GmbH - Eichstatt, Germany

SCHEDULE | Fri, Oct 27 to Thu, Nov 30, 2023 - EXTENDED!!!

Auction Opening | Fri, Oct 27, 2023, 4:00 AM

Auction Closing | Thu, Nov 30, 2023, 4:00 AM - EXTENDED!!!

DESCRIPTION | Welcome to Day 2 of our auction sale! We've got an exciting lineup today, featuring a wide range of items that are essential for maintenance and manufacturing. From maintenance equipment to metalworking tools, general plant equipment, and a lot more, there's something for everyone. Whether you're looking to upgrade your workshop or stock up on essential tools, this is the place to be. Sale in conjunction with Gordon Brothers.

AUCTION | End of 2023 Online Equipment Auction

AUCTIONEER | Baja Bid

TYPE | Online Auction

FEATURING | Mycronic / Mydata P&P, Dek Horizon, Koh Young AOI, Mirtec AOI, Summit 750 Rework, PVA / SCS 4393, LPKF ProtoMat S63

SCHEDULE | Mon, Dec 4 to Thu, Dec 7, 2023

Auction Opening: December 4 [08:00AM EST]

Begins Closing: December 7 [01:00PM EST]

LOCATION | Longwood, FL USA

FETURING | Mycronic / Mydata MY100DX-14 SMT Pick & Place, Mycronic / Mydata Magazines & Feeders, Juki JX-100 LED SMT Pick & Place, Mycronic / Mydata MY500 Jet Printer, Dek Horizon 01 Screen Printer, Ekra X4 Screen Printer, 2017 ASM E by DEK Screen Printer, Speedline Momentum Screen Printer, Koh Young 8030-3 Inline 3D SPI, Koh Young KY3020T Table Top SPI, Yestech BX Table Top AOI, 2015 Mirtec MV-3L Table Top AOI, Mirtec V-7xi Inline AOI, BTU Pyramax 98A Reflow Oven, Nordson Dage XD6600 X-Ray, Yestech YTX-X1 X-Ray, Speedline Camalot FX-D Dispenser, PVA Delta 6 Glue/Epoxy Dispenser, Air-Vac DRS25 Rework System, VJ Electronix Summit 750 Rework Station, SonoTek EVS 1000 Solder Recovery System, Flexlink F5000H-K Laser Marker, PVA / SCS 4393 Conformal Coater, LPKF ProtoMat S63 Rapid Prototyping Machine, Simplimatic Magazine Loader / Unloader, Simplimatic FIFO Buffer, Simplimatic 2050 Conveyor, Lynx .5 Meter Conveyor, ... AND MORE….

SEE MORE AUCTIONS...

█ Electronic Equipment Market

MARKET - Used Electronic Assembly Machines For Sale

P&P / FEEDERS

Assembleon Yamaha MG1R Pick and Place

World Equipment Source - Assembleon /Yamaha MG1Rl P&P

World Equipment Source, LLC

Adhesive Dispensers

Musashi FAD2500

KD Electronics Ltd.

AOI INSPECTION

Viscom S3088 Ultra Chrome 3D AOI

Lewis & Clark Viscom S3088 AOI

Lewis & Clark

Board Cleaners

Aqueous Technologies Trident XLD

Baja Bid

P&P / FEEDERS

Panasonic NPM-W2

SMTUnion - Panasonic NPM-W2 Chipshooter

SMTUnion

MORE EQUIPMENT & PARTS...

SUBMIT YOUR RFQ ....

MARKET - Used PCB Assembly Equipment Wanted To Buy

P&P / FEEDERS

Assembleon MG-1R

World Equipment Source Assembleon MG-1R

World Equipment Source, LLC

PCB TEST

Agilent 3070

Lewis & Clark Agilent 3070

Lewis & Clark

PCB TEST

Agilent 3070

KD Electronics Agilent 3070

KD Electronics

Soldering - Reflow

Vitronics XPM 1240

Baja Bid

SEE Buyers' Used Assembly Equipment Wants

█ Electronics Manufacturing & Assembly Events Calendar

EVENTS

Silicon Valley Expo & Tech Forum | December 7

SMTA

Pan Pacific Strategic Electronics Symposium | January 29 to February 1, 2024

SMTA

█ Electronics Manufacturing Training Courses & PCB Assembly Training

FIND TRAINING FOR:

IPC Certification

Soldering & Rework

PCB Design

Electronics Assembly

Electronics Inspection

Online Training

TRAINING - Electronics Manufacturing and PCB Assembly Training Courses

IDEA-STD-1010 Essentials Online Live Training Course

Multiple dates and locations. Check the link for details

EPTAC Corporation

Idea Counterfeit Component Workshop Online Live Training

Multiple dates and locations. Check the link for details

EPTAC Corporation

TRAINING - PCB Inspection Electronics Manufacturing Training Courses

IPC-A-640 Interactive PCB Inspection Lab (CIT or CIS Option)

Multiple dates and locations. Check the link for details

EPTAC Corporation

TRAINING - PCB Rework and Hand Soldering Training Courses

Customizable Basic Hand Soldering

Multiple dates and locations. Check the link for details

Blackfox Training Institute, LLC

Advanced Surface Mount Micro Hand Soldering

Illinois, Schaumburg

Dec. 14 to Dec. 15, 2023

EPTAC Corporation

TRAINING - Online Electronics Manufacturing and Assembly Training Courses

Reflow Soldering 101 Training Course

Surface Mount Technology Association (SMTA)

IPC/WHMA-A-620 Expert (CSE) Certification Training Course

EPTAC Corporation

IPC Certified Electronics Program Manager (CEPM) Training and Certification Program

Association Connecting Electronics Industries (IPC)

Component Placement 101 Training Course

Surface Mount Technology Association (SMTA)

ESD Control for Electronics Assembly

Association Connecting Electronics Industries (IPC)

MORE TRAINING COURSES...

█ Electronics Manufacturing & PCB Assembly Career Center

Job Needs & Wants

JOBS

YOUR job openings

Overseas SMT Engineer

All over the world, Alabama, USA

I.C.T ( Dongguan Intercontinental Technology Co., Ltd. )

SMT Engineer, Marketing Representative, Sales Representative, Business Assistant

All over the world, California, USA

I.C.T ( Dongguan Intercontinental Technology Co., Ltd. )

AOI Engineer

Hai Phong, Vietnam

Dongguan RuiHengHuaTai Electronic Co., Ltd

SMT Process Technician III

Racine, Wisconsin, USA

Cree Lighting

Experienced SAKI AOI programmer

All US, USA

AirDataIOT,LLC

Engineering Project Manager

Strongsville, Ohio, USA

Spartronics

Senior Quality Engineer

Williamsport, Pennsylvania, USA

Spartronics

Senior Systems Engineer

Strongsville, Ohio, USA

Spartronics

Procurement Specialist

Brooksville, Florida, USA

Spartronics

Buyer/Planner

Williamsport, Pennsylvania, USA

Spartronics

Corporate Director of Quality

Williamsport, Pennsylvania, USA

Spartronics

Automotive service Technician

Golden, CO, USA

Engage2excel

Program Manager

Williamsport, Pennsylvania, USA

Spartronics

RESUMES

YOUR resume

POSITION: Technician

JOB CATEGORY: Engineering Maintenance

CURRENT LOCATION: Port Harcourt, Nigeria

WILLING TO RELOCATE?: Yes

SUMMARY OF QUALIFICATIONS: Electrical installation, troubleshooting, ms word, voltage regulation.

POSITION: Automated assembly machine operation technician

JOB CATEGORY: Production

CURRENT LOCATION: Doha, Qatar

WILLING TO RELOCATE?: Yes

SUMMARY OF QUALIFICATIONS: Technician for assembling electronic boards on automatic assembly machines, Samsung, Panasonic, Quad, Universal, Sanyo, Hatishi

YOUR next job ... YOUR next employee ...

█ PCB Design & Assembly Industry Associations

Surface Mount Technology Association (SMTA)

SMTA is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies.

Membership Info | SMTA Certification | Bookstore | Upcoming Events

Association Connecting Electronics Industries (IPC)

IPC is a US-based trade association dedicated to the competitive excellence and financial success of its nearly 2,600 member companies which represent all facets of the electronic interconnection industry, including design, printed wiring board manufacturing and electronics assembly.

Membership Info | Training & Certification | Online Store | Upcoming Events

Editor - Dave "davef" Fish (submit your technical articles)

SMTnet.com, 98 Elm Street, Portland, Maine 04101 USA, Tel.207-780-0887.

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