Patent ID: 7290813

Claim:
A rest pad for supporting a workpiece, the rest pad being mounted to an end effector, comprising: a support pad having a proximal end, a distal end, and a support surface, said support surface including an inclined surface that transitions to a substantially flat surface at said distal end; and an edge stop having a wafer contact surface, an edge stop proximal end, and an edge stop distal end, said edge stop being located adjacent to said distal end of said support pad, wherein the support pad and the edge stop are maintained in fixed positions on the rest pad and the wafer contact surface and the support pad remain proximal to each other to restrain the workpiece; wherein a first imaginary vertical plane is defined to pass through a central axis of said support pad and a second imaginary vertical plane is defined to pass through a central axis of said edge stop, the first and second imaginary vertical planes are offset by an angle so that said first imaginary vertical plane does not intersect said edge stop, said central axis of said support pad extending between said proximal end and said distal end of said support pad and said central axis of said edge stop extending between the edge stop proximal end and the edge stop distal end.