Patent ID: 9073172
Filing Date: 2015-07-07
Classification: B24B,C09G

Abstract:
1. A polishing pad useful for polishing at least one of semiconductor, magnetic and optical substrates comprising: a polymeric matrix, the polymeric matrix having a polishing surface; polymeric microelements distributed within the polymeric matrix and at the polishing surface of the polymeric matrix; the polymeric microelements having an outer surface and being fluid-filled for creating texture at the polishing surface; and alkaline-earth metal oxide-containing regions distributed within each of the polymeric microelements, the alkaline-earth metal oxide-containing regions being spaced to coat less than 50 percent of the outer surface of the polymeric microelements; and less than 0.1 weight percent total of the polymeric microelements being associated with i)alkaline-earth metal oxide-containing particles having a particle size of greater than 5 μm; ii) alkaline-earth metal oxide-containing regions covering greater than 50 percent of the outer surface of the polymeric microelements; and iii) polymeric microelements agglomerated with alkaline-earth metal oxide-containing particles to an average cluster size of greater than 120 μm.