Patent ID: 8992288
Filing Date: 2015-03-31
Classification: B24B

Abstract:
1. A polishing pad auxiliary plate adapted to be mounted on a rotating surface plate of a polishing device for detachably attaching a polishing pad on the rotating surface plate, the polishing pad auxiliary plate comprising: a lower auxiliary plate adapted for overlapping a top surface of the rotating surface plate; a first adhering member for adhering the lower auxiliary plate to the rotating surface plate; an upper auxiliary plate equipped with a pad support surface on which the polishing pad is overlapped and adhered, and adapted for overlapping a top surface of the lower auxiliary plate; a second adhering member for adhering the upper auxiliary plate to the lower auxiliary plate; and an alignment member for mutually aligning the lower auxiliary plate and the upper auxiliary plate and matching center axes thereof, wherein by removing the upper auxiliary plate from the lower auxiliary plate adhered to the rotating surface plate by means of the first adhering member, the polishing pad is removable from the rotating surface plate in a state still adhered to the pad support surface of the upper auxiliary plate, and the removed upper auxiliary plate is re-adhereable and attachable in an aligned state to the lower auxiliary plate by means of the alignment member, wherein: the alignment member is provided at a position further to an inner circumference side than an outer circumference surface of the lower auxiliary plate and the upper auxiliary plate, the alignment member comprises at least one engaging convex part provided on one of the lower auxiliary plate and the upper auxiliary plate and projecting facing an other, and at least one engaging concave part provided on the other of the lower auxiliary plate and the upper auxiliary plate and engaging with the engaging convex part, the engaging convex part and the engaging concave part are formed with engagement portions positioned at an outer circumference part of the lower auxiliary plate and the upper auxiliary plate, and the engagement portions of the engaging convex part and the engaging concave part are constituted by a ring shaped engaging outer circumference surface and engaging inner circumference surface which are fit to each other extending continuously in a circumference direction of the lower auxiliary plate and the upper auxiliary plate.