Express Newsletter

The SMTnet Express newsletter is sent weekly to over 25,000 subscribers.

SMTnet
»
Express Newsletter

Influence of Pd Thickness on Micro Void Formation of Solder Joints in ENEPIG Surface Finish

SMTnet Express December 13, 2012, Subscribers: 26067, Members: Companies: 9068, Users: 34058

Influence of Pd Thickness on Micro Void Formation of Solder Joints in ENEPIG Surface Finish

by: Dong-Won Shin, Jin-Woo Heo, Yeonseop Yu, Jong-Soo Yoo, Pyoung-Woo Cheon, Seon-Hee Lee; Samsung Electro-Mechanics Co., Ltd.

We investigated the micro-void formation of solder joints after reliability tests such as preconditioning (precon) and thermal cycle (TC) by varying the thickness of Palladium (Pd) in Electroless Nickel / Electroless Palladium / Immersion Gold (ENEPIG) surface finish. We used lead-free solder of Sn-1.2Ag-0.5Cu-Ni (LF35). We found multiple micro-voids of less than 10 µm line up within or above the intermetallic compound (IMC) layer. The number of micro-voids increased with the palladium (Pd) layer thickness. Our results revealed that the micro-void formation should be related to (Pd, Ni)Sn4 phase resulted from thick Pd layer. We propose that micro-voids may form due to either entrapping of volatile gas by (Pd, Ni)Sn4 or creeping of (Pd, Ni)Sn4.

read article »

Forum search results for related keywords: surface finish, reliability test, solder joints

INSITE B
Bench Top AOI
INSITE B - Bench Top AOI

Small, manually operated, and cost effective system...

by: ORPRO Vision

Mark5 Series -
Reflow System
The Mark III Reflow System

Up to 40% reduction in nitrogen and electrical consumption...

Offered by: Heller

ProntoVIEW-MARKUP - Assembly Viewer Software
ProntoVIEW-MARKUP Assembly viewer software

Full electronics manufacturing process software... Trial

Offered by: Unisoft

SP210avi 23" Inline Stencil Printer
SP210avi Inline Stencil Printer

Retains reputation as the smallest printer in the market

by: Speedprint

iineo II Pick & Place System

Extremely high feeder count, largest industry board size...

by: Europlacer

HYDRON® WS 325
Cleaning and Defluxing Agent
HYDRON WS 325 Cleaning and Defluxing Agent

Developed for cleaning water soluble flux residues...

Offered by: ZESTRON

GE Intelligent Platforms - Dec. 18-19

SMT Assembly Equipment...

by: Cardinal Circuit Auctions

Electronic Manufacturing Exchange #162 - Dec. 19-20

Semiconductor & Test Equipment

by: GoIndustry DoveBid

Vitronics XPM-820
Reflow Oven
Vitronics XPM-820 Reflow Oven

JMW Enterprises

all marketplace listings

Camalot 5000
Adhesive Dispenser
Camalot 5000 Adhesive Dispenser

PPM

all marketplace listings

Assembleon Topaz Xi
Pick and Place
Assembleon Topaz Xi Pick and Place

CE Exchange

all marketplace listings

Internet Marketing tip of the week

Search. Be in the top 5 of search results. Why?

Search is the #1 way people find new products and services. However, those same people don't go past the first two pages of search results and many stay on the first page only.

Search engines are now suggesting queries while you type in your search phrase. This has led to users staying on the first page of results more often.

A recent study shows 87% of searchers click a top 5 result!

SMTnet Power Membership allows your company to add links to your website which in turn will help your search engine rankings and ensure your content has the chance to get indexed more frequently. Read more about linking directly from your company catalog on SMTnet to your website.

NEPCON JAPAN 2013 � 42nd Electronics R&D and Manufacturing Technology Expo
Jan. 16., Tokyo, Japan

APEX Expo 2013
Feb. 19., San Diego, CA, USA

Jobs:

MPM technician/ field service

Tampa, FL, USA | Cardinal Circuit

Product Manager

Carlsbad, CA, USA | Nordson ASYMTEK

Manager FP&A Manufacturing

Orange County, CA, USA | David Anthony Group

Resumes:

Process Specialist

Fort Worth, TX, USA

Electronic Process Engineer

Brampton, Orlando, Canada

SMT Process Engineering Specialist

Kitchener, Ontario, Canada

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: Webtorial - Design and Assembly Process Challenges for Bottom Terminations Components (BTCs) such as QFN, DFN and MLF in Tin-Lead & Lead Free World - January 15 & 22

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: Printed Board Assembly Cleaning and Contamination Defect FREE webinar - January 10

Technical Editor - Davef (submit your technical articles)

Newsletter Editor - Anna Girouard

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

Unsubscribe. | Contact customer service