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SMTnet Express, June 20, 2019, Subscribers: 32,068, Companies: 10,815, Users: 24,854

Technical Library

Dissolution in Service of the Copper Substrate of Solder Joints

Credits: Nihon Superior Co., Ltd.

It is well known that during service the layer of Cu6Sn5 intermetallic at the interface between the solder and a Cu substrate grows but the usual concern has been that if this layer gets too thick it will be the brittleness of this intermetallic that will compromise the reliability of the joint, particularly in impact loading. (...)

This paper reports an investigation into the kinetics of the growth of the interfacial intermetallic, and the consequent reduction in the thickness of the Cu substrate in solder joints made with three alloys, Sn-3.0Ag-0.5Cu, Sn-0.7Cu-0.05Ni and Sn-1.5Bi-0.7Cu-0.05Ni.

Forum search results for related keywords: Cu thickness.

SMT / PCB Products

PCB ASSEMBLY

Board Handling - Pallets, Carriers, Fixtures

Count On Tools

Solder Paste Stencils

BEST, Inc.

Prototyping

SlingShot Assembly

Dispensing

GPD Global

Reflow

Heller

Hand Assembly

Virtual Industries

PCB CLEANING

PCB STORAGE

Cleaning

ZESTRON

Cleaning Agents

Kyzen

Board Handling - Storage

Seika Machinery

PCB TEST & INSPECTION

PCB REWORK

Inspection

Mirtec

Inspection

ASC International

Rework

Metcal

PCB SOFTWARE

Software

Unisoft

Software

KIC

SMT / PCB Equipment Auctions

Surplus Equipment to Ongoing Operations of Jabil Malaysia

June 25 - 27 | X-Line Asset Management

Electronic Equipment Mart

Austin American Tech X30A

Stencil Cleaners

IBE SMT Equipment

Nordson Asymtek C-740

Coating and Encapsulation

LEL Semi

Vi Technology 9K Spectro

AOI / Automated Optical Inspection

X-Line Asset Management

Koh Young KY 8030-3L

SPI / Solder Paste Inspection

Qinyi Electronics Co.,Ltd

Assembleon AX-501

Pick and Place/Feeders

Capital Equipment Exchange

DEK Horizon 03iX

Screen Printers

KD Electronics Ltd.

Events Calendar

eSMART Factory Conference | June 20 - 21 | SMTA

Wisdom Wednesday Webinar: R&D Tax Breaks for IPC Members | June 26 | IPC

PCB Cleaning Webinar Series | ZESTRON Corporation

Training Courses

IPC Training & Certification Courses

Soldering & PCB Rework Courses

Career Center

Electronics Experts Needed - Contract Jobs

offered by: Performance Review Institute

An excellent contract job opportunity for consultants or recent retirees

Do you have experience in some or all of these processes: Printed Boards, or Printed Board Assemblies, or Cable and Wire Harness Assemblies? We have ELECTRONICS AUDITOR positions available now!

US and International Travel, Flexible scheduling, Competitive compensation and travel expenses...

Click for more information »»

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 | Upcoming Events

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 | Online Store | Upcoming Events

Technical Editor - Davef (submit your technical articles)

Newsletter Editor - Anna Girouard

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

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Used PCB Assembly Equipment - CE Exchange

AccuStock��� Automatic Reel Component Storage (ASRS)

Dual Mode 3D AOI/SPI

SMT Parts Store Online - MPM, Camalot, Quad, Mirae - nozzles, feeders, accessories.

Unused Equipment? - let BajaBid turn your EXCESS ASSETS into cash!

KIC - Making Reflow Ovens Smarter

Improving Reliability of Circuit Assemblies Workshop

Metcal CV-5200 Connection Validation Soldering System

Selective Conformal Coating System - GPD impleCoat

Experience the Blackfox Difference - Premier IPC Training & Certification Center

Kyzen Free PCB Cleaning Audit

Soldertools.net - Rework Tools

Vacuum Tweezers - pick up small components with ease

Turn-Key PCB Prototypes - On Your Bench in 5 Days

Late Model SMT equipment ONLINE AUCTIONS

KD Electronics - High quality SMT nozzles, feeders, cutters, filters, etc

Quality Pre-Owned SMT Eequipment - Robo-Tek

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