Patent ID: 9207276
Filing Date: 2015-12-08
Classification: G01R

Abstract:
1. Method for testing a semiconductor wafer, comprising: providing a semiconductor wafer comprising a protruding annular rim, a first redistribution structure disposed on the front side of the semiconductor wafer, a second redistribution structure disposed on the rear side of the semiconductor wafer within the protruding annular rim and a plurality of vias extending from the front side to the rear side; retaining the protruding annular rim between a first retaining member and a second retaining member, the first retaining member having an annular ring, the first and second retaining members being mutually co-operable to retain the protruding annular rim; applying compressive force to the first and second retaining members to prevent the semiconductor wafer from moving; contacting a first probe to the first redistribution structure on the front side; and contacting a second probe to the second redistribution structure on the rear side; wherein the first probe is in contact with the first redistribution structure and the second probe is in contact with the second redistribution structure at the same time.