Patent ID: 7846776

Claim:
A method for processing a microfeature workpiece releasably attached to a first support member, the workpiece including a microelectronic substrate, a plurality of microelectronic dies on and/or in the substrate, and a sacrificial support member attached to an active side of the substrate over the dies, wherein the sacrificial support member comprises a plurality of openings extending at least partially through the sacrificial support member, and wherein the openings are formed before attaching the sacrificial support member to the active side of the substrate, the method comprising: separating individual dies from the workpiece by cutting through the sacrificial support member and the substrate while the workpiece is attached to the first support member; attaching a singulated die and corresponding portion of the sacrificial support member as a unit to a second support member; and removing the sacrificial support member from the die attached to the second support member with an aqueous removal solution that attacks a material of which the sacrificial support member is composed.