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SMTnet - where else would you meet over 500,000 industry professionals? Late Model SMT Equipment. Complete Circa 32,000 Sq Meters SMT Facility. Over 1,000 Lots

SMTnet Express, November 19, 2015, Subscribers: 23,763, Members: Companies: 14,760, Users: 39,366

Technical Library

HALT Testing of Backward Soldered BGAs on a Military Product

B. Gumpert, B. Fox, L. Woody; Lockheed Martin Corporation

The move to lead free (Pb-free) electronics by the commercial industry has resulted in an increasing number of ball grid array components (BGAs) which are only available with Pb-free solder balls. The reliability of these devices is not well established when assembled using a standard tin-lead (SnPb) solder paste and reflow profile, known as a backward compatible process. Previous studies in processing mixed alloy solder joints have demonstrated the importance of using a reflow temperature high enough to achieve complete mixing of the SnPb solder paste with the Pb-free solder ball. Research has indicated that complete mixing can occur below the melting point of the Pb-free alloy and is dependent on a number of factors including solder ball composition, solder ball to solder paste ratio, and peak reflow times and temperatures. Increasing the lead content in the system enables full mixing of the solder joint with a reduced peak reflow temperature, however, previous research is conflicting regarding the effect that lead percentage has on solder joint reliability in this mixed alloy solder joint.

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Forum search results for related keywords: lead-free BGA, reflow temperature, accelerated aging.

SMT / PCB Products

Cleaning

Kyzen

Reflow

Heller

Dispensing

GPD Global

Inspection

Mirtec

Printing

Speedprint

Dispensing

Nordson Asymtek

Pick & Place

Europlacer

Inspection

SEC

Inspection

Scienscope

Rework

BEST, Inc.

Cleaning

ZESTRON

Pick & Place

ESSEMTEC

SMT / PCB Equipment Auctions

Late Model SMT Equipment. Complete 300,000SF SMT Facility. Over 1,000 Lots

December 8 - 10 | The Branford Group

Online SMT Auction - Fuji, MPM, Heller and others.

December 1 - 3 | Baja Bid

Electronic Equipment Mart

Universal Genesis G14 4988C

Pick and Place Equipment/Feeders

X-Line Asset Management

SCS Ionograph 500M SMD II

Cleaning Equipment & Supplies

IBE SMT Equipment

MVP Ultra 850G

AOI / Automated Optical Inspection

GES Associates LLC

PCB Conveyors

Conveyors

JMW Enterprises

Fuji QP351E-MM

Pick and Place Equipment/Feeders

Baja Bid

Vitronics XPM3 1240

Reflow Ovens

Capital Equipment Exchange

Panasonic RL-131

PTH Equipment

Robo-Tek

DEK Photon

Screen Printing Equipment

Tekmart International Inc.

Quad Parts, Feeders, Nozzles

Pick and Place Equipment

PPM Parts

Events Calendar

International Printed Circuit and APEX South China Fair 2015 (HKPCA & IPC Show)

Trade Show/Exhibition | December 2 - 4 | IPC

Electronics Packaging Technology Conference - EPTC 2015

Conference | December 2 - 4 | Institute of Electrical and Electronics Engineers (IEEE)

5th EFY Expo India 2016

Conference, Trade Show/Exhibition | January 11 - 13 | EFY Enterprises Pvt Ltd

Career Center

Technical Support Specialist

North Billerica, MA, United States | BTU International

Process Engineer

Meridian, ID, United States | Western Electronics

Sales and Marketing

West Caldwell, NJ, United States | JRE Incorporated

Industry Associations Events

SMTA

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

Next Event: SMTA Webtorial: Reballing of Devices-The "How To" as well as "How Do I Know My Supplier Has Done Good Work" - December 3 - 10

IPC

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 Programs | Standards & Publications - Online Store

Next Event: IPC Technical Education Professional development courses for engineering staff and managers - December 2 - 3

Technical Editor - Davef (submit your technical articles)

Newsletter Editor - Anna Girouard

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

Used PCB Assembly Equipment - CE Exchange

All you want to know about BOUNDARY-SCAN

VisionPro Series Bench Top 3D SPI - the ultimate in flexibility

Custom SMT Nozzles - Count on Tools

DownStream Technologies - software for post processing PCB designs.

Software for PCB Manufacturing - Unisoft

SMT Equipment Auctions & Exchanges

Essemtec Paraquda Multifunctional SMT Center � One Machine Platform for All Tasks

PCB Cleaning products - Zestron

ii-Feed intelligent pick and place feeder

Fluid Pressure Control - a breakthrough in uniform fluid dispensing - GPD Global

HELLER - Choose an Oven for Your Reflow Needs

MIRTEC - the Global Leader in PCB INSPECTION Technology.

Speedprint SP700avi inline SMT screen printer

Used SMT Equipment - IBE

SMTnet - Electronic Industry Hub

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