Patent ID: 7518391
Filing Date: 2009-04-14
Classification: G01R

Abstract:
1. A method for detecting defects in a test structure array using a probe card, said method comprising: (a) supplying, by the probe card, at least one electrical signal to a first set of test pads, said first set of test pads being electrically coupled to a first set of test structures, while imaging said first set of test structures; and (b) supplying, by the probe card, at least one electrical signal to a second set of test pads, said second set of test pads being electrically coupled to a second set of test structures, while imaging said second set of test structures, wherein while supplying the electrical signal to the first set of test pads, the probe card block at least a portion of the second set of test structures from being imaged, while not blocking the first set of test structures from being imaged.