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GPD Global - Selective Conformal Coating System - SimpleCoat

SMTnet Express, April 7, 2022, Subscribers: 25,732, Companies: 11,564, Users: 27,174

Effect Of Vacuum Reflow On Solder Joint Voiding In Bumped Components

Voids affect the thermal characteristics and mechanical properties of a solder joint, thereby affecting the reliability of the solder interconnect. The automotive sector in particular is requiring the mitigation of solder voids in various electronic control modules to the minimum possible level. Earlier research efforts performed to decrease voids involved varying the reflow profile, paste deposit, paste alloy composition, stencil aperture, and thickness. Due to the various advantages ...

Credits: Auburn University

Void Reduction in Bottom Terminated Components Using Vacuum Assisted Reflow

Pockets of gas, or voids, trapped in the solder interface between discrete power management devices and circuit assemblies are, unfortunately, excellent insulators, or barriers to thermal conductivity. This resistance to heat flow reduces the electrical efficiency of these devices, reducing battery life and expected functional life time of electronic assemblies. There is also a corresponding increase in current density (as the area for current conduction is reduced) that generates additional heat, further leading to performance degradation.

Credits: Heller Industries Inc.

Optimising Solder Paste Volume for Low Temperature Reflow of BGA Packages

The need to minimise thermal damage to components and laminates, to reduce warpage-induced defects to BGA packages, and to save energy, is driving the electronics industry towards lower process temperatures. For soldering processes the only way that temperatures can be substantially reduced is by using solders with lower melting points. Because of constraints of toxicity, cost and performance, the number of alloys that can be used for electronics assembly is limited and the best prospects appear to be those based around the eutectic in the Bi-Sn system, which ...

Credits: Nihon Superior Co. Ltd

Operation of a Vacuum Reflow Oven with Void Reduction Data

Credits: BTU International

The Effect Of Vacuum Reflow Processing On Solder Joint Voiding And Thermal Fatigue Reliability

A test program was developed to evaluate the effectiveness of vacuum reflow processing on solder joint voiding and subsequent thermal cycling performance. Area array package test vehicles were assembled using conventional reflow processing and a solder paste that generated substantial void content in the solder joints. Half of the population of test vehicles then ...

Credits: Nokia Bell Labs

See Forum results for related keywords - vacuum reflow : 134

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Strange reaction with Selective Solder alloy -- A while back, we had a yellow coating showing up on some solder joints at Selective Solder (LEAD alloy). I contacted the company for our machine and he looked into it. One change we had made not too long before is we switched from Superior 75 to Superior 515 flux for cleaning nozzles. But that doesn't really explain how the yellow stuff got on the board. Now the problem has cropped up again. We had a few boards showing a yellow substance on the joints roughly 24 hours after soldering. We also did a big cleaning and re-tinning of nozzles, which involves soaking them in the Superior flux and then re-tinning them. Some of the soaked nozzles didn't get tinned yesterday, and they also show signs of yellow. The LEAD FREE nozzles did not. So I am thinking that the Superior 515 is somehow reacting to the LEAD alloy. Has anyone experienced this or can shed some light on it?

cutting shrink tube -- We cut a lot of heat shrink tubing to length by hand. It is mainly short pieces up to a few inches. Size goes up to 3/4" or so. We currently us a paper cutter. What machines can any of you recommend? We would prefer something serviceable with easy to obtain spares. Thanks!

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ZESTRON Academy to Host FREE "Defluxing of Copper Pillar Bumped Flip-Chips" Webinar
ZESTRON is pleased to announce that it will host "Defluxing of Copper Pillar Bumped Flip-Chips" on Tuesday, April 26th, from 11:00 AM to 12:00 PM EST.... | ZESTRON
Global Supply Chains Feeling Impacts of Russia-Ukraine War
New data from IPC show that the electronics manufacturing supply chain is already feeling the impact of the Russia-Ukraine War.... | IPC
Waste Water Treatment Machine RWT-1000
RWT-1000 is used to treat rinsed DI water from PCBA cleaning machine which makes DI water reuse and discharge reaches local environment laws. RWT-1000 is an .... | HJS Automation International Limited

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NEW EQUIPMENT - For Sale

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PCB INSPECTION

PCB SOFTWARE

I.C.T. PCBA Conformal Coating Machine

Coating Equipment

I.C.T.

SIR Testing for Process Qualification and Verification

Test Services

Zestron

MV 7 OMNI 2D/3D In-Line AOI System

Inspection

Mirtec

ProntoTEST-FIXTURE - ATE Programming

Software

Unisoft

PCB ASSEMBLY

PCB ASSEMBLY

Flux-Free Formic Acid Reflow Oven

Reflow

Heller

Island Series Table Top Dispensers

Dispensing

GPD Global

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FEATURED AUCTIONS

AUCTION | Surplus SMT Equipment From Jabil Penang

AUCTIONEER | The Branford Group

TYPE | On-Line Auction

FEATURING | High-Speed Fuji Placement Machines: NXT, AIM & XPF-W, Reflow Ovens, Screen Printers, SPIs and AOIs!

SCHEDULE | April 10-13, 2022

AUCTION | Bay Area EMS Prototype Facility

AUCTIONEER | The Branford Group

TYPE | On-Line Auction

FEATURING | Complete Juki Line �� Very Low Hours & Usage! (100+) Juki Feeders (8mm to 54mm) X-Ray, Microscopes, ESD Work Benches & Soldering

SCHEDULE | April 19-28, 2022

AUCTION | Surplus to the Ongoing Operation of Global EMS Provider (Intervala)

AUCTIONEER | The Branford Group

TYPE | On-Line Auction

FEATURING | (2) Lines: Siemens & Assembleon Placement Machines Including (500+) Feeders and Accessories! SMT Support and Complete Thru-Hole Department

SCHEDULE | Apr 28 to May 4, 2022

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MART - Used Equipment For Sale

Assembleon /Yamaha Opal-X II Pi

Pick and Place Equipment/Feeders

World Equipment Source, LLC

Panasonic NPM-W P&P

Pick and Place/Feeders

AllSurplus

ASM Siemens Parts

Pick and Place/Feeders

KD Electronics

Panasonic DT401=M

Chipshooters

Qinyi Electronics

Ersa Versaflow 3/45

Selective Solder Equipment

Baja Bid

Viscom S3088 Ultra Chrome 3D AOI

AOI / Automated Optical Inspection

Lewis & Clark

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

MART - Used Equipment Wanted

Mydata SMT P&P

Pick & Place /Feeders

Baja Bid

Assembleon MG-1R

Pick & Place/Feeders

World Equipment Source, LLC

Agilent 3070

In-Circuit Testers

Lewis & Clark

Agilent 3070

In-Circuit Testers

KD Electronics

See Buyers' Used Equipment Wants

EVENTS

Space Coast Chapter Technical Meeting: Printed Wiring Board Fabrication Design Attributes | April 7 | SMTA

Huntsville Expo & Tech Forum | April 12 | SMTA

Virtual Course: Selection Criteria of Surface Finish for Next Generation PCB Technologies | April 20 | SMTA

Defluxing of Copper Pillar Bumped Flip-Chips | April 26 | ZESTRON

SPONSORED BY

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Electronics Assembly

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Online Training

Electronics Manufacturing and PCB Assembly Training Courses

IDEA-STD-1010 Essentials For Counterfeit Component Identification Online Live

Apr 13, 2022 | New Hampshire, Manchester | EPTAC Corporation

Counterfeit Components Workshop Online Live Training

Apr 15, 2022 | New Hampshire, Manchester | EPTAC Corporation

SMT Processes Certification Course

Apr 19, 2022 | Wisconsin, Germantown | Surface Mount Technology Association (SMTA)

Component Identification Online Live Certification

Jun 17, 2022 | New Hampshire, Manchester | EPTAC Corporation

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JOBS - Post your job openings now

RESUMES - Post your resume now

Field Service Engineer
Florham Park, NJ | Heller Industries 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

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SMTA - Surface Mount Technology Association 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

IPC - Association Connecting Electronics Industries 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)

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