Patent ID: 6433565
Filing Date: 2002-08-13
Classification: G01R

Abstract:
A method for testing for defects in a ball grid array package comprising the following steps:placing a test ball grid array package in a coarse pitch socket for making electrical contact between a test device and a plurality of wafer bumps formed on a fine pitch surface of the test ball grid array package; coupling the plurality of wafer bumps formed on the fine pitch surface of the test ball grid array package to a first opposite surface of an interposer; placing a subject ball grid array package to be tested in a coarse pitch socket for making electrical contact between the test device and a plurality of contact pads formed on a coarse pitch surface of the subject ball grid array package; and coupling a plurality of wafer bumps formed on a fine pitch surface of the subject ball grid array package to a second opposite surface of the interposer for making electrical contact between the test device and the plurality of wafer bumps formed on the fine pitch surface of the subject ball grid array package.