Patent ID: 7387484
Filing Date: 2008-06-17
Classification: H01L,Y10S

Abstract:
1. A wafer positioning system, comprising: a wafer handling chamber having a shutter through which a wafer is introduced into the wafer handling chamber; a plurality of processing chambers disposed adjacent to the wafer handling chamber, each having an opening and a gate, wherein the openings allow the wafer to enter the processing chambers and the gates close the openings; a wafer transfer robot disposed in the wafer handling chamber for transferring the wafer into the processing chambers, wherein the wafer transfer robot has a tray supporting the wafer; a signal emitter disposed on a front end of the tray; a signal receiver disposed on the front end of the tray, —whereby the signal receiver receives the signal emitted from the signal emitter and outputs a wafer position signal; a control module electrically connected to the signal receiver, determining whether the wafer is in a predetermined position via the wafer position signal; and a plurality of planar mirrors disposed on the side walls above the openings between the wafer handling chamber and the processing chambers to reflect the light emitted from the signal emitter, wherein the planar mirrors have a plurality of holes.