Patent ID: 7710133
Filing Date: 2010-05-04
Classification: G01R

Abstract:
1. A method of testing electrical characteristics of a semiconductor device having a ball-shaped external electrode on a rear surface thereof, said method comprising: preparing a plurality of cantilever-type contactors each including: pairing said cantilever-type contactors so that the respective tips of the paired contactors are in contact with said ball-shaped external electrode during testing; bringing at least one of said support plate and said semiconductor device toward the other so that said arc-shaped edges of said paired contactors are in contact with respective surface regions of said ball-shaped external electrode divided by an axis of said ball-shaped external electrode passing through a middle point between said two positions where said paired contactors are supported; and driving at least one of said support plate and said semiconductor device relative to the other so that both of said arc-shaped edges of said paired contactors are slidingly moved in a same direction that the rear surface of said semiconductor device extends along respective surface regions of said ball-shaped external electrode, whereby said flexible beam portions of said paired contactors flex to perform a wiping operation.