Patent ID: 6165806
Filing Date: 2000-12-26
Classification: G01R,H01L,Y10T

Abstract:
A method for isolating a fault in an inner lead bond region of a .mu.BGA (micro-Ball Grid Array) package for holding an integrated circuit die, said inner lead bond region including at least one beam lead with each beam lead coupling a respective bond pad on said integrated circuit die to a respective solder ball, and said at least one beam lead being encapsulated with a seal material within said inner lead bond region, the method including the steps of:A. immersing said inner lead bond region of said .mu.BGA package into a dissolving bath to dissolve said seal material covering said at least one beam lead within said inner lead bond region;B. washing said inner lead bond region of said .mu.BGA package in a cleaning bath to remove acid and to remove dissolved seal material from said at least one beam lead within said inner lead bond region; andC. inspecting said inner lead bond region after said seal material is sufficiently removed from said at least one beam lead within said inner lead bond region to isolate said fault on said at least one beam lead within said inner lead bond region.