IPC 9704 PDF

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Active, Most Current. Look Inside. Complete Document. Detail Summary View all details. Price USD. Secure PDF. Single User. Add to Cart. View Full Details and Buy. Complementary Documents and Links:. This document is meant to be used as a methodology for strain gage placement and subsequent testing of Printed Circuit Assemblies PCAs using strain gages. The method describes specific guidelines for strain gage testing of PCAs during the printed board manufacturing process, including assembly, test, system integration, and other types of operations that may induce board flexure.

The suggested procedure enables printed board assemblers to conduct strain gage testing independently, and provides a quantitative method for measuring board flexure, and assessing risk levels. In certain cases, the described test approach may be used for non-area-array discrete SMT devices such as capacitors or resistors. Purpose Strain gage testing allows objective analysis of the strain and strain rate levels to which a surface mount component may be subjected during PCA assembly, test, and operation.

Characterization of worst-case PCA strain is critical due to the susceptibility of component interconnects to strain-induced failures.

Excessive strain can result in various failure modes for different solder alloys, package types, surface finishes, or laminate materials. Such failures include solder ball cracking, trace damage, laminate related adhesive failure pad lifting or cohesive failure pad cratering and package substrate cracking. Update Cart. Your Shopping Cart is empty.

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