Design Guideline for Ball Impact Test Apparatus

Abstract

The ball impact test is developed as a package-level measure of the board-level reliability of solder joints in the sense that it leads to brittle intermetallic fracturing, similar to that from a board-level drop test. Following classical structural dynamics principles, the ball impact test process is analyzed to provide insights into transient characteristics of this particular test methodology. A design guideline for the ball impact test apparatus based on characteristics of the measured impact force profile is proposed.