Patent ID: 7518237

Claim:
A microfeature workpiece system, comprising: a microfeature workpiece that includes a first microelectronic die having a first major surface, a second major surface facing away from the first major surface, and an edge surface between the first and second major surfaces; a support member positioned adjacent to the microfeature workpiece; a first adhesive assembly attached between the microfeature workpiece and the support member, the first adhesive assembly including a first layer forming a first adhesive bond with the microfeature workpiece at a first interface between the first adhesive assembly and the microfeature workpiece, the first layer having a first composition and a first generally uniform thickness, a second layer forming a second adhesive bond with the support member at a second interface between the first adhesive assembly and the support member, the second layer having a second composition different than the first composition and having a second generally uniform thickness, wherein the first adhesive bond and the second adhesive bond are stronger than an adhesive bond between the first layer and the second layer of the first adhesive assembly such that the first adhesive assembly fails at a location between the first interface and the second interface when the first adhesive assembly is subjected to a stress; and a second microelectronic die attached to the first microelectronic die with a second adhesive assembly having a composition generally the same as a composition of the first adhesive assembly.