Patent ID: 9018099
Filing Date: 2015-04-28
Classification: B24B,H01L

Abstract:
1. A polishing pad, comprising a polishing layer comprising a polishing region having an aperture and a light-transmitting region inserted into the aperture in the polishing region, wherein a polishing side surface of the light-transmitting region is, prior to polishing, subjected to a surface roughness treatment so as to have a surface roughness, and the light-transmitting region has a light transmittance of 40% to 60% at a wavelength of 600 nm before use, wherein the surface roughness of the polishing side surface of the light-transmitting region is an arithmetic mean surface roughness (Ra) of 1 μm to 2.2 μm, and the light-transmitting region is made only of a thermoset resin material having a light transmittance of 75% or more at the wavelength of 600 nm.