Patent ID: 9156126
Filing Date: 2015-10-13
Classification: B24B,H01L

Abstract:
1. A polishing pad comprising a polishing region, a cushion layer, and a support film layered in this order, wherein a light-transmitting region is provided on the support film and in an opening part that passes through the polishing region and the cushion layer; the light-transmitting region is a window constituted by a light-transmitting resin passing through the polishing region and the cushion layer in the opening part, and has a peripheral part and a recessed part on a surface of a polishing platen-side, wherein a bottom surface of the peripheral part of the light-transmitting resin is flush with a bottom surface of the cushion layer; the support film is layered on and attached to the bottom surface of the peripheral part and the bottom surface of the cushion layer; and the support film is not layered on nor attached to a top surface of the recessed part, which remains open.