Patent ID: 6631935
Filing Date: 2003-10-14
Classification: H01L,Y10S

Abstract:
An end-effector suitable for picking up a deformed flexible wafer, wherein the wafer is to be positioned on a first side of the end-effector, and the end-effector has a second side opposite to the first side, the end-effector comprising:a surface on the first side, wherein said surface is to face the wafer when the wafer is supported by the end-effector; a plurality of vortex chucks for emitting gas vortices from said surface towards the wafer to support the wafer in the end-effector while impeding contact between the wafer and said surface, wherein at least some of said vortex chucks are located along the periphery of said surface, the vortex chucks impeding the wafer curling if the wafer is flexible; and a chamfered edge extending laterally outward from a boundary of said surface towards the second side of the end-effector, wherein the wafer is allowed to extend beyond the chamfered edge when the wafer is supported by the end-effector.