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SMTnet Express March 21, 2013, Subscribers: 26266, Members: Companies: 13317, Users: 34462

Low Cycle Fatigue Behaviour of Multi-joint Sample in Mechanical Testing

by: C.P. Hunt, O. Thomas, D. Di Maio, E. Kamara, H. Lu; National Physical Laboratory, University of Greenwich

This paper explores the behaviour of a copper test vehicle with multiple reflowed solder joints, which has direct relevance to ball grid arrays (BGA) and high density interconnect structures. The paper explores the relative stress conditions on the distributed joints and the sensitivity to ball joint shape. The joints were exposed to isothermal fatigue, which was produced by a mechanical load that induced a cyclic shear stress across all the joints.

First published in the 2012 IPC APEX EXPO technical conference proceedings.

read article »

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April 10 - 11

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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: Improving SMT Stencil Printing Yields - April 11 & 18

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/FED Conference on Embedded Components - June 4 - 5

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