Patent ID: 8625076

Claim:
A wafer edge exposure module configured to connect to a semiconductor wafer track system, comprising: a wafer spin device configured to support a wafer, the wafer coated with a photosensitive material; an optical system configured to direct exposure light on a respective edge portion of the wafer; a scanner interface module configured to send or receive dummy edge exposure information from a scanner via a computer network; a controller configured to control the optical system using the dummy edge exposure information from the scanner; a light source configured to emit the direct exposure light; a focusing lens configured to focus the direct exposure light received from the light source; and an exposure mask configured to shape the direct exposure light to impinge on an develop the photosensitive material at the circumferential edge of the wafer, wherein the optical system includes N light sources, where N is an integer greater than one, the N light source spaced apart from each other by an angle of approximately 360/N degrees between each pair of successive light sources.