Patent ID: 9156124
Filing Date: 2015-10-13
Classification: B24B,B24D,B32B,C08G

Abstract:
1. A method of fabricating a soft polishing pad for polishing a semiconductor substrate, the method comprising: mixing a pre-polymer, a primary curative, and a secondary curative different from the primary curative to form a mixture, wherein the primary curative is a diamine compound and the secondary curative is a diol compound, wherein mixing the pre-polymer, the primary curative, and the secondary curative to form the mixture comprises mixing with an approximate molar ratio of 100 parts of the pre-polymer, 85 parts of the primary curative, and 15 parts of the secondary curative; and curing the mixture to provide a homogeneous polishing body comprising a thermoset, closed cell polyurethane material having a hardness approximately in the range of 20 Shore D to 40 Shore D.