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SMTnet Express August 29, 2013, Subscribers: 26233, Members: Companies: 13474, Users: 35110

Technical Library

Effect of Gold Content on the Microstructural Evolution of SAC305 Solder Joints Under Isothermal Aging

by Mike Powers, Jianbiao Pan, Julie Silk, Patrick Hyland; Agilent

Au over Ni on Cu is a widely used printed circuit board (PCB) surface finish, under bump metallization (UBM), and component lead metallization. It is generally accepted that less than 3 wt.% Au in Sn-Pb solder joints inhibits formation of detrimental intermetallic compounds (IMC). However, the critical limit for Au content in Pb-free solder joints is not well established.

Three surface-mount package platforms, one with a matte Sn surface finish and the others with Ni/Au finish, were soldered to Ni/Au-finished PCB using Sn-3.0Ag 0.5Cu (SAC305) solder, in a realistic manufacturing setting. The assembled boards were divided into three groups: one without any thermal treatment, one subjected to isothermal aging at 125°C for 30 days, and the third group aged at 125°C for 56 days...

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Forum search results for related keywords: Pb-free solder , Ni/Au, intermetallic compound, Sn-Ag-Cu

SMT / PCB Products

Dual-lane Dispenser
S-922N-LED Dispensers

System for LED cavity encapsulation...

by: Asymtek

VIGON® N 600
PCB Defluxing Agent
VIGON N 600 Cleaning and Defluxing Agent

Water-based and biodegradable...


BGA Rework Station
FINEPLACER� coreplus BGA rework station

The perfect blend of performance and cost...

by: Finetech

SM471 Flexible High
Speed Chip Shooter
SM471 Flexible High Speed Chip Shooter

Chip mounting speed of 75,000 CPH...


MTS500 Condor Flying Probe Tester
MTS500 Condor Flying Probe Tester

Fixtureless design, maximum flexibility...

by: Digitaltest

Stencil Printer
SP700avi Inline Stencil Printer

Utilising the most advanced drive...

by: Speedprint

MV-9 Series
In-Line AOI Machines
MV-9 Series AOI

Exclusive 15 Mpx ISIS Vision System...

by: Mirtec

Mark5 Series -
Reflow System
The Mark III Reflow System

Up to 40% reduction in nitrogen consumption...

by: Heller

SMT / PCB Equipment Auctions

X-Line Asset Management

Jabil - Surplus Equipment to Ongoing Operations

DEK 265 Horizon 02 Screen Printer, Fuji CP 742E Chipshooter and more...

September 9 - 10 | auction by: X-Line Asset Management

Electronic Equipment Mart

Orbotech VT-S22
Orbotech VT-S22 AOI

IBE SMT Equipment

all marketplace listings

Crown Simplimatic
Reflow Exit Conveyor
Crown Simplimatic Reflow Exit Conveyor


all marketplace listings

Fuji NXT M3s, M6s
Fuji Chipshooters


all marketplace listings

Screen Printer
MPM AP 25 HiE Screen Print


all marketplace listings

Events Calendar

productronica 2013
- 20th International Trade Fair

November 12-15 | by: Messe Munchen

Find the entire value chain for electronics production in the leading international trade fair.

Cleaning, Testing and Reliability Workshop
- Free Online Webinar

September 10 | by: ZESTRON

A guide to best practices on PCB cleaning, failure mechanisms, solder paste challenges, surface analytics, PCB test techniques, and low cost solutions.

Career Center


Business/Pricing Analyst

Austin, TX, USA | Nordson ASYMTEK

SMT Programmer/Lead

Franksville, WI, USA | BEI Electronics,LLC

Senior SMA Process Engineer

Lynchburg, VA, USA | AMTI Advanced Manufacturing


Customer Service Engineer

Suzhou, China

SMT Engineer

Chennai, India

SMT Test Ebgineer

Pune, India

Industry Associations Events


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: Webinar: Free Webinar: High Reliability and RoHS - September 17


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: electronica India 2013 - September 4 - 6

Technical Editor - Davef (submit your technical articles)

Newsletter Editor - Anna Girouard, 98 Elm Street, Portland, Maine 04101 USA, Tel.207-780-0887.

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Used PCB Assembly Equipment - CE Exchange

Software for PCB Manufacturing - Unisoft

SMT equipment auction

ii-Feed tape feeding solution for Europlacer machines

SMTAI 2013

Momentum Series Stencil Printers - Speedline

productronica 2013

Custom SMT Equipment Nozzles - Count on Tools

SP700avi Inline Stencil Printer - Speedprint

Mark5 SMT Reflow Oven - Heller

Zestron - cleaning products for the SMT industry

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