Patent ID: 6405739
Filing Date: 2002-06-18
Classification: B05C,H01L,Y10S

Abstract:
A spin chuck for clamping and rotating a substrate in a chamber, said spin chuck comprising:at least three roller shafts; a planetary gear transmission mechanism coupled to said at least three roller shafts for rotating each of said at least three roller shafts separately, said planetary gear transmission mechanism including a gear shaft and an output shaft coupled to each of said at least three roller shafts, said planetary gear transmission mechanism being configured to allow said output shafts to be moved radially with respect to a central axis of said spin chuck; a drive means to rotate said gear shaft; and a clamping roller fixed on each of said at least three roller shafts and driven to rotate separately by the at least three roller shafts so as to rotatably clamp the substrate.