Patent ID: 6984839
Filing Date: 2006-01-10
Classification: G01V,H01L,Y10S

Abstract:
1. A wafer processing apparatus on which a pod is detachably mounted, having an access port through which a wafer is put in and out, the pod having a box having an opening, shelves for taking custody of wafers, and a lid for separably covering the opening, the wafer processing apparatus detecting whether the wafer is present on each of the shelves, the wafer processing apparatus comprising: a door unit, comprising: a mapping unit, comprising: a movable portion configured to support the door arm supporting member and the mapping frame arm supporting member and to move the door unit and the mapping frame, wherein the first emitter and the first detector are moved toward the access port and the opening and are plunged into the pod after the door is opened with the lid by the door unit, and, by a movement of the movable portion, the slot between the first emitter and the first detector crosses an edge portion of the wafer to be located when the wafer is present on each of the shelves.