Patent ID: 6305898
Filing Date: 2001-10-23
Classification: H01L

Abstract:
A transfer mechanism for transferring a workpiece to or from a storage section, comprising:(a) an arm member having a tip end portion for supporting a workpiece thereon, said tip end portion having at its distal end at least one projection adapted to be in contact with an edge of the workpiece for restricting movement of the workpiece toward the distal end;(b) a movement mechanism for reciprocally moving the arm member between its retracted position and its extended position, while supporting said workpiece on said arm member, to transfer said workpiece to or from said storage section; and(c) a positioning member for contacting an edge of the workpiece and moving the workpiece on the arm member in relation to the arm member toward the distal end when the arm member retracts, said positioning member being disposed in tracks of the arm member movement, at a fix position free from movement of the arm member,wherein when said arm member is moved by said movement mechanism toward said retracted position, the edge of said workpiece supported on said arm member contacts said positioning member to block the movement of said workpiece and to place the workpiece on said arm member at a prescribed position between the projection and the positioning member.