Patent ID: 9202725
Filing Date: 2015-12-01
Classification: H01L

Abstract:
1. A substrate holding and rotary driving mechanism to rotate flat round objects, the substrate holding and rotary driving mechanism comprising: a hollow housing having a front wall, a rear wall, side walls, and an interior; at least three outer shafts rotatingly installed in the front wall, the outer shafts having axes of rotation, front ends that extend through the front wall to the outside of the housing, and rear ends that intend into the interior; at least three inner shafts that are rotatingly installed in the outer shafts, respectively, and have their front ends extending to the outside from the front ends of the outer shafts and their rear ends extending through the rear ends of the outer shafts, the inner shafts having axes of rotation that are eccentrically offset from the axes of rotation of the outer shafts; rotary drive members rigidly attached to the front ends of the inner shafts; contact members rigidly attached to the rear ends of the inner shafts; a mechanism to turn the at least three outer shafts in one direction and in a direction opposite to the one direction to move the contact members apart to release the flat object or toward each other to come into frictional contact with the flat object due to the eccentric offset the mechanism to turn the at least three outer shafts having a spider with at least three radial arms that is rotatingly installed in the front wall of the housing and outside the housing, the at least three radial arms having linking means for linking with the at least three outer shafts for turning the outer shafts in one direction and in a direction opposite to the one direction, the mechanism to turn the at least three outer shafts further having a drive means for turning the spider; and a mechanism to simultaneously rotate the at least three inner shafts together with the contact members to frictionally rotate the flat object when the contact members are moved toward each other, the flat object having a periphery, the contact members being contact rollers that rotate the flat object when the contact rollers are rotated by the mechanism for simultaneous rotation of the at least three inner shafts when the contact rollers come into contact with the periphery of the flat object.