Patent ID: 7141997

Claim:
A method for performing at least one operation of a testing operation and a burn-in operation on an uncut wafer having two opposing surfaces using a first plate which includes a biasing mechanism, and a second rigid plate selectively engageable with the first plate, the second rigid plate having a plurality of contact elements extending therefrom and having a cavity for receiving the uncut wafer therein, the method comprising: providing a wafer having a plurality of semiconductor die thereon and a plurality of interconnects between a plurality of the semiconductor die on the wafer; placing the wafer, in a desired orientation, between the first plate and the second rigid plate with the plurality of contact elements on the second rigid plate engaging corresponding locations on the wafer; and biasing the plurality of contact elements of the second rigid plate against a surface of the wafer by applying an elastic force to an opposing surface to the surface of the wafer with the first plate, the force caused by the biasing mechanism, and the force applied to substantially the entirety of the opposing surface.