Patent ID: 7115891
Filing Date: 2006-10-03
Classification: H01L,Y10S

Abstract:
1. A wafer mapping device for recognizing existence of wafers along with descending and opening of a front door of a closed type clean container for mounting and housing wafers on any one of or a plurality of shelves among a plurality of internal shelves in a state where the front door of the closed type clean container is made tightly contact to a port door of a load port, comprising: a swinging member coupled to the port door so as to swing around a predetermined horizontal axis extending below the port door and parallel to the port door; a pair of sensor portions fixed to the swinging member and mutually separated as well as protruding towards the clean container from the swinging member above the port door; a light emitting device and light receiving device fixed one each to the pair of sensor portions and facing each other; and swinging drive means for rotating the swinging member around the predetermined horizontal axis to an angle where the wafers enter between the light emitting device and the light receiving device without the light emitting device and the light receiving device contacting the wafers, and inserting the pair of sensor portions into the clean container.