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SMTnet Express, July 28, 2022, Subscribers: 25,269, Companies: 11,590, Users: 27,367

█ Electronics Manufacturing Technical Articles

How to Manage Material Outgassing in Reflow Oven

In a lead-free reflow process, temperatures are higher, and materials use outgasses more than in a leaded reflow process. The trends toward higher density populated boards and more pin-in-paste technology also increase solder paste use. More components and more solder paste result in more outgassing of chemistry during the reflow process. Some assemblies report condensation of vapors when the cold printed circuit board enters the oven. Little is known about the interaction between these condensed materials in terms of the interaction between these condensed materials and the reliability of the assembly. Apart from the question of reliability, a printed circuit board contaminated with a small film of residues after reflow soldering is not desirable.

Credit: Vitronics Soltec

Minimizing Voiding In QFN Packages Using Solder Preforms

First published in the 2012 IPC APEX EXPO technical conference proceedings. The focus of this paper will quantify the preform requirements and process adjustments needed to use preforms in a standard SMT process. In addition, experimental data showing vo

Credit: Indium Corporation

Effects of Assebly Process Variables on Voiding at a Thermal Interface.

The present work offers a discussion and a first case study to identify and illustrate voiding mechanisms for a particular TIM between a heat spreader and the back of a flip chip. Pronounced differences were observed between stencil printing and dispensing in terms of initial void formation, apparently related to the specific properties of the material. Measurements of the effects of heat ramp rate and peak temperature showed the subsequent evolution and final void size distribution to be determined by the initial part of the cure profile up to the material gelling temperature.

Credit: Universal Instruments Corporation

Novel Approach to Void Reduction Using Microflux Coated Solder Preforms for QFN/BTC Packages that Generate Heat

The requirement to reconsider traditional soldering methods is becoming more relevant as the demand for bottom terminated components (QFN/BTC) increases. Thermal pads under said components are designed to enhance the thermal and electrical performance of the component and ultimately allow the component to run more efficiently. Additionally, low voiding is important in decreasing the current path of the circuit to maximize high speed and RF performances. The demand to develop smaller, more reliable, packages has seen voiding requirements decrease below 15 percent and in some instances, below 10 percent.

Credit: Alpha Assembly Solutions

Fill the Void V - Mitigation of Voiding for Bottom Terminated Components

Voiding in solder joints has been studied extensively, and the effects of many variables compared and contrasted with respect to voiding performance. Solder paste flux, solder powder size, stencil design, circuit board design, via-in-pad design, surface finish, component size, reflow profile, vacuum reflow, nitrogen reflow and other parameters have been varied and voiding quantified for each. The results show some differences in voiding performance with respect to most of these variables but these variables are not independent of each other. Voiding in solder joints is a complex issue that often requires multiple approaches to reduce voiding below required limits. This paper focuses on solutions to voiding for commonly used bottom terminated components (BTCs).

Credit: FCT ASSEMBLY, INC.

The Morphology Evolution and Voiding of Solder Joints on QFN Central Pads with a Ni/Au Finish

First published in the 2012 IPC APEX EXPO technical conference proceedings. In this paper, we report on a comprehensive study regarding the morphology evolution and voiding of SnAgCu solder joints on the central pad of two different packages - QFN and an Agilent package called TOPS - on PCBs with a Ni/Au surface finish.

Credit: Agilent Technologies, Inc.

See Forum results for related keywords - voiding : 1157

LEARN MORE in the Technical Library... Submit Your Technical Paper...

█ Printed Circuit Board Assembly & PCB Design Forum

GSM Spindle Runout Error -- We are in process of calibrating one of our GSM machines; we were able to successfully calibrate the front and rear ULC's but when we moved on to calibrate the head we get a spindle runout error midway through the routine (pic attached.) The spindles do not appear bent and we've never had placement issues before. Does anyone know any common causes of the spindle runout error?

Rotten smell from Electrovert Aquastrom 100 -- Hello Forum, My washing machine have this rotten smell that I'm not sure where it comes from. I cleaned all the filters, changed new water, pretty much cleaned the whole machine but the smell still there. If anyone had this problem please advice. Thank you in advance.

Search the PCB Assembly Forum Visit the PCB Assembly Forum...

█ SMT, PCB Electronics Assembly Manufacturing News

North American EMS Industry Down 7.6 Percent in June

IPC Releases EMS Industry Results for June 2022...

Association Connecting Electronics Industries (IPC)

IPC - North American EMS Industry Down 7.6 Percent in June

Altus Introduces Heller Industries Latest Technology to the industry

Since partnering with Heller Industries last year, Altus Group, a leading supplier of capital equipment for the electronics industry, has seen growing interest in the company's reflow oven technology including its latest innovation, the MK7....

Altus Group

Altus - Heller Industries MK7 Reflow Oven

Fairstock HK Limited: Broadcom to Buy VMware for $61 Billion in Record Chip Deal

CEO expands software strategy with cloud-computing provider...

Fairstock hk limited

Fairstock hk limited - Broadcom Inc. agreed to buy cloud-computing company VMware Inc.

GET more Electronics Assembly Manufacturing News...

█ SMT / PCB Products & Services

NEW SMT / PCB EQUIPMENT & SERVICES - For Sale

PCB REFLOW OVEN

Flux-Free Formic Acid Reflow Oven

Reflow

Heller

PCB DISPENSING

MAX II (Heated) High Precision Dispensers

Dispensing

GPD Global

PCB COATING

I.C.T. PCBA Conformal Coating Machine

Coating Equipment

I.C.T.

Cleaning Agents

pH Neutral & Alkaline Cleaning Agents

Cleaning Agents

ZESTRON Americas

Selective Soldering

Pillarhouse Jade Handex

Selective Soldering

Pillarhouse USA

PCB CLEANING

Purbest - Hydro-Clean LDS Cleaning Machine

Cleaning Equipment

Purbest Tech

PCB INSPECTION

MV-3 FIVE CAMERA In-Line AOI System

Inspection

Mirtec

PCB SOFTWARE

ProntoVIEW-MARKUP Assembly Viewer...

Software

Unisoft

View More New Electronic Manufacturing Products...

█ SMT / PCB Assembly Equipment Auctions

AUCTION | Online Auction - Featuring Assets from Jabil Hungary

AUCTIONEER | Lewis & Clark

TYPE | Online Auction

FEATURING | Please join us for our upcoming online auction featuring assets from Jabil Hungary - Bidding Opens July 27, 2022 7:00 AM EST / 1:00 PM CEST First Lot Begins Closing: August 3, 2022 7:00 EST / 1:00 PM CEST Auction Link: https://bit.ly/3z8JG6L Featuring: 2014 Vi Technology PI Primo Solder Paste Inspection 2016 Vi Technology PI Primo Solder Paste Inspection 2016 Vi Technology PI Primo Solder Paste Inspection 2005 IPTE NTM 4133 SpeedRouter 2007 Ferromatik K-TEC 275 S Injection Moulding In conjunction with our partners at The Branford Group & Hilco Industrial

SCHEDULE | Wed, Jul 27 to Wed, Aug 3, 2022

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AUCTION | Online Auction Featuring Assets from Jabil Wuhan

AUCTIONEER | Lewis & Clark

TYPE | Online Auction

FEATURING | Please Join us for our upcoming Online Auction featuring assets from Jabil Wuhan Bidding Opens July 28, 2022 8:00 PM EST / 8:00 AM China Standard Time. Bid closing begins: August 2, 2022 at 9:00 PM EST in US / August 3, 2033 at 9:00 AM China Standard Time in China Auction Link: https://bit.ly/3zynHYq Featuring: 2014 GKG, G5 Automatic Screen Printer Pfeiffer HLT-270 Helium Leak Detector Temperature Chamber GDWS-300L Wire Bonders V Cut PCB Separator Wire Bond Pull Testers Vacuum Pumps UV Curing Units Ultrasonic Cleaner Fiber Winder FS-230

SCHEDULE | Thu, Jul 28 to Tue, Aug 2, 2022

Visit the Assembly Equipment Auctions Calendar...

█ Electronic Equipment Mart

MART - Used Electronic Assembly Machines For Sale

PCB PRINTING

DEK NEOHORIZON 03iX

SMTUnion - DEK NEOHORIZON 03iX

Screen Printing Equipment

SMTUnion

P&P / Feeders

Assembleon AX201

Pick and Place/Feeders

KD Electronics

SELECTIVE SOLDERING

Ersa Versaflow 3/45

Baja Bid - Ersa Versaflow 3/45

Selective Solder Equipment

Baja Bid

PCB INSPECTION

Viscom S3088 Ultra Chrome 3D AOI

Lewis & Clark Viscom S3088 AOI

AOI / Automated Optical Inspection

Lewis & Clark

P&P / FEEDERS

Assembleon Yamaha MG1R Pick and Place

World Equipment Source - Assembleon /Yamaha MG1Rl P&P

Pick and Place/Feeders

World Equipment Source, LLC

P&P / FEEDERS

Panasonic NPM-W P&P

AllSurplus Panasonic NPM-W P&P

Pick and Place/Feeders

AllSurplus

View More Used Equipment For Sale... Send a RFQ to Equipment Suppliers ....

MART - Used PCB Assembly Equipment Wanted To Buy

P&P / FEEDERS

Assembleon MG-1R

World Equipment Source Assembleon MG-1R

Pick & Place/Feeders

World Equipment Source, LLC

PCB TEST

Agilent 3070

Lewis & Clark Agilent 3070

In-Circuit Testers

Lewis & Clark

PCB TEST

Agilent 3070

KD Electronics Agilent 3070

In-Circuit Testers

KD Electronics

P&P /FEEDERS

Mydata SMT P&P

Baja Bid - Mydata SMT Placement Machine

Pick & Place /Feeders

Baja Bid

See Buyers' Used Assembly Equipment Wants

█ Electronics Manufacturing & Assembly Events Calendar

EVENTS

Wisconsin Chapter: 4th Annual Golf Outing | August 16

SMTA

Queretaro Expo & Tech Forum | August 18

SMTA

Stencil, Underside Wipe and Misprint Cleaning Aug 23rd | August 23

ZESTRON

█ 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 For Counterfeit Component Identification Online Live

New Hampshire, Manchester

Aug. 01 to Aug. 02, 2022

EPTAC Corporation

Counterfeit Components Workshop Online Live Training

New Hampshire, Manchester

Aug. 03, 2022

EPTAC Corporation

Component Identification Online Live Certification

New Hampshire, Manchester

Oct. 28, 2022

EPTAC Corporation

TRAINING - PCB Inspection Electronics Manufacturing Training Courses

SMT Processes Certification Course - Chihuahua

Alabama, Mexico, To Be Determined

Aug. 23 to Aug. 25, 2022

Surface Mount Technology Association (SMTA)

SMT Processes Certification Course - Guadalajara

Alabama, Mexico, Guadalajara, Jalisco

Sep. 19 to Sep. 21, 2022

Surface Mount Technology Association (SMTA)

610 Interactive Inspection Lab

Connecticut, Watertown

Oct. 07, 2022

EPTAC Corporation

TRAINING - PCB Rework and Hand Soldering Training Courses

Customizable Basic Hand Soldering

Arizona, Phoenix

Aug. 29 - Aug. 31, 2022

Sep. 19 - Sep. 21, 2022

Blackfox Training Institute, LLC

Hand Solder Rev 8 Certification Course

California, Anaheim

Nov. 28 to Dec. 02, 2022

EPTAC Corporation

TRAINING - Online Electronics Manufacturing and Assembly Training Courses

IPC J-STD-001 Trainer (CIT) Certification Online Live Training Course

Online/On-Demand

EPTAC Corporation

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

Online/On-Demand

ACI Technologies, Inc.

Live Online Training - IPC/WHMA-A-620 Trainer (CIT) Certification Training Course

Online/On-Demand

ACI Technologies, Inc.

Live Online Training - IPC-A-610 (CIT) Recert.

Online/On-Demand

ACI Technologies, Inc.

Reflow Soldering 101 Training Course

Online/On-Demand

Surface Mount Technology Association (SMTA)

Visit All Electronics Manufacturing Training Courses...

█ Electronics Manufacturing & PCB Assembly Jobs

CAREER CENTER - Job Needs & Wants

JOBS - Post your job openings now

Lead Application Laboratory Technician

Manassas, VA

ZESTRON

Field Service Engineer

Florham Park, NJ

Heller Industries Inc.

Administrative Services / Customer Service

Acton, Massachusetts, USA

CAMI Research Inc.

Electrical Engineer

Acton, Massachusetts, USA

CAMI Research Inc.

SMT Process Engineer

Milwaukee, WI

Cree Lighting

Soldering Technician, Touch-up for PCBAs

Santa Cruz, CA

Dynamic Engineering

Business Development Sales Manager, Microelectronics

Suwanee, GA

MacDermid Alpha Electronics Solutions

Solderer

Nashville, NC

ACDi

RESUMES - Post your resume now

Posiition: Assembly Operator

Currrent Location: India, Trivandrum

Summary of Qualifications: Reads instructions, such as work orders, drawing, and wire lists to determine materials needed and sequence of assembly, Manual Hand tool using for Wire cutting, stripping, crimping. Soldering, Splicing, Assembling PCB Boards, Boot Shrinking, Heat Shrink coating, Potting,5S Trained]

Posiition: Engineer

Currrent Location: India, Palakkad

Summary of Qualifications: I had 4 years experience 3 years in SMT Field and 1 year in Stock Market I have well experience in SMT process and machine Knowledge personally I have well knowledge on reflow, SPI,DEK AOI I can handle the process related issues and tackle the situation

Post your resume on SMTnet

Find your next job now... Find your next employee now...

█ 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.