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SMTnet Express, May 16, 2019, Subscribers: 31,918, Companies: 10,765, Users: 26,116

Technical Library

Transient Solder Separation of BGA Solder Joint During Second Reflow Cycle

Credits: Cisco Systems, Inc.

As the demand for higher routing density and transfer speed increases, Via-In-Pad Plated Over (VIPPO) has become more common on high-end telecommunications products. The interactions of VIPPO with other features used on a PCB such as the traditional dog-bone pad design could induce solder joints to separate during the second and thereafter reflows. The failure has been successfully reproduced, and the typical failure signature of a joint separation has been summarized.

To better understand the solder separation mechanism, this study focuses on designing a test vehicle to address the following three perspectives: PCB material properties, specifically the Z-direction or out-of-plane Coefficient of Thermal Expansion (CTE); PCB thickness and back drill depth; and quantification of the driving force magnitude beyond which the separation is due to occur.

Forum search results for related keywords: solder joint separation.

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SMT / PCB Equipment Auctions

ETM Equipment From Leading RF Manufacturer

May 21 - 23 | X-Line Asset Management

Electronic Equipment Mart

Panasonic CM402L 8+3

Pick and Place/Feeders

Capital Equipment Exchange

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Universal Instruments GC120

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KD Electronics Ltd.

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Speedline Aquastorm 50

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LEL Semi

Agilent 8564E 40Ghz Spectrum Analyzer

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Events Calendar

eSMART Factory Conference | June 20 - 21 | SMTA

How IPC-2581 & IPC-CFX Together Enable Industry 4.0 - Webinar | May 22 | IPC

PCB Cleaning Webinar Series | ZESTRON Corporation

Training Courses

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


Used PCB Assembly Equipment - CE Exchange

Software for PCB Manufacturing - Unisoft

Delta Solder Materials from Qualitek for Ultra-Fine Pitch printing.

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

Improving Reliability of Circuit Assemblies Workshop

Experience the Blackfox Difference - Premier IPC Training & Certification Center

Custom SMT Nozzles and Tools - Count on Tools

Hioki 1240 Flying Probe Tester - ultra-high speed measuring, fine pitch inspection.

MIRTEC MV 6 OMNI High-Speed / High-Performance 3D AOI MACHINE. - Rework Tools

NEW Fully featured benchtop dispenser - GPD Global

Vacuum Tweezers - pick up small components with ease

KIC - Making Reflow Ovens Smarter

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

AccuStock��� Automatic Reel Component Storage (ASRS)

Used SMT Equipment - IBE

Quality Pre-Owned SMT Eequipment - Robo-Tek

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