Patent ID: 8541889

Claim:
A probe card, comprising: a main circuit board electrically connected to a tester in order to test at least a first unpackaged set of chips and at least a second unpackaged set of chips; a frame provided on the main circuit board, the frame including at least a first socket configured to receive the first unpackaged set of chips and at least a second socket configured to receive the second unpackaged set of chips; and a cover plate positioned over the frame, the cover plate comprising: a first movable member configured to maintain a position of the first unpackaged set of chips in the first socket during testing of the first unpackaged set of chips; and a second movable member configured to maintain a position of the second unpackaged set of chips in the second socket during testing of the second unpackaged set of chips, wherein the first movable member is configured to move independently of the second movable member, and wherein the first unpackaged set of chips comprises: at least a first chip die including a through-via; and at least a second chip die stacked on the first chip die and electrically connected the first chip die, wherein the first chip and second chip die are not connected to a package substrate.