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SMTnet - where else would you meet over 500,000 industry professionals? Happy New Year 2016!

SMTnet Express, December 31, 2015, Subscribers: 23,946, Members: Companies: 14,865, Users: 39,660

Technical Library

Study on Solder Joint Reliability of Fine Pitch CSP

Yong Hill Liang, Hank Mao, YongGang Yan, Jindong (King) Lee; AEG, Flex (Flextronics International)

Today's consumer electronic product are characterized by miniatuization, portability and light weight with high performance, especially for 3G mobile products. In the future more fine pitch CSPs (0.4mm) component will be required. However, the product reliability has been a big challenge with the fine pitch CSP. Firstly, the fine pitch CSPs are with smaller solder balls of 0.25mm diameter or even smaller. The small solder ball and pad size do weaken the solder connection and the adhesion of the pad and substrate, thus the pad will peel off easily from the PCB substrate. In addition, miniature solder joint reduce the strength during mechanical vibration, thermal shock, fatigue failure, etc. Secondly, applying sufficient solder paste evenly on the small pad of the CSP is difficult because stencil opening is only 0.25mm or less. This issue can be solved using the high end type of stencil such as Electroforming which will increase the cost.

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Forum search results for related keywords: solder joint reliability, CSP, electroforming, fine pitch components, IMC, surface finish, NSMD, stencil opening, fixture, underfill.

SMT / PCB Products


Glenbrook Tech.



Pick & Place


Solder Paste Stencils

BEST, Inc.


ASC International












GPD Global



SMT / PCB Equipment Auctions

Surface Mount Semiconductor Facility Equipment Online Auction

January 14 - 18 | Tauber-Arons

Surplus Late Model SMT Equipment. 3 Complete SMT Lines - 30,000 Sq Ft Facility

January 19 - 20 | The Branford Group

Electronic Equipment Mart

Juki 2060L and 2050L

Pick and Place Equipment/Feeders

X-Line Asset Management


Chipshooters / Chip Mounters

Tekmart International Inc.

PCB Conveyors


JMW Enterprises

MVP Ultra 850G


GES Associates LLC

Mydata Agilis Inserts and Magazines

Pick and Place Equipment/Feeders

IBE SMT Equipment

Quad Parts

Pick and Place

PPM Parts

Mydata MY100SX-14

Pick and Place Equipment/Feeders

AdoptSMT Europe GmbH

Vitronics XPM820

Reflow Ovens

Capital Equipment Exchange

Panasonic RL-131

PTH Equipment


Events Calendar

NEPCON JAPAN 2016 - 45th Electronics R&D and Manufacturing Technology Expo

Conference, Trade Show/Exhibition | January 13 - 15 | Reed Exhibitions

Pan Pacific Microelectronics Symposium

Conference | January 25 - 28 | SMTA

5th EFY Expo India 2016

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

Career Center

Sales Manager

Woodridge, IL, USA

Navitas Systems LLC

Technical Sales Engineer

San Jose, CA, USA

YINCAE Advanced Materials, LLC.

Business Development

Appleton, WI, USA

Surface Mount Technology Corp.

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: Pan Pacific Microelectronics Symposium 2016 - January 25 - 28


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 APEX EXPO 2016 - March 13 - 17

Technical Editor - Davef (submit your technical articles)

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

Used PCB Assembly Equipment - CE Exchange

Vacuum Tweezers - pick up small components with ease

Custom SMT Equipment Nozzles - Count on Tools

Software for PCB Manufacturing - Unisoft

XQuik - compact benchtop X-ray inspection system

Surplus late model SMT equipment online auctions - X-Line Assets Management

ii-Feed tape feeding solution for Europlacer machines

HELLER - Choose an Oven for Your Reflow Needs

Mirtec MV-6 High Performance AOI - Under $100K! - While Supplies Last - Limited time offer.

Used SMT Equipment - IBE

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

PCB Cleaning products - Zestron

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

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