Patent ID: 7125318
Filing Date: 2006-10-24
Classification: B24B

Abstract:
1. A polishing pad useful for polishing a surface of a semiconductor substrate, the polishing pad comprising: (a) a rotational axis; (b) a polishing layer that includes: (c) a first plurality of grooves in the polishing layer, each groove of the first plurality of grooves having a first end located within the central region and a second end located within the polishing region, the second end being radially inward of the outer peripheral edge and radially outward of the rotational axis; and (d) a second plurality of grooves in the polishing layer, each groove of the second plurality of grooves spaced from ones of the first plurality of grooves and having a first end located within the polishing region and a second end located radially outward of the second end of the first plurality of grooves in at least one of: