Patent ID: 6328632
Filing Date: 2001-12-11
Classification: B24B,B24D

Abstract:
A web-format polishing pad for use with a web-format planarizing machine having a planarizing table to support a portion of the polishing pad in a planarizing zone, at least one roller to hold another portion of the polishing pad, and a carrier assembly for handling a microelectronic substrate assembly, the polishing pad comprising:a body having a planarizing medium, an elongated first side edge, an elongated second side edge opposite the first side edge, and a length sufficient to extend across the planarizing zone and wrap around the roller, the planarizing medium having an elongated interior region extending lengthwise along the body, an elongated first exterior side region extending lengthwise along the first side edge and an elongated second exterior side region extending lengthwise along the second side edge;a first planarizing structure in the interior region of the planarizing medium, the first planarizing structure having a first planarizing aggressiveness; anda second planarizing structure in each of the first and second side regions of the planarizing medium, the second planarizing structure having a second planarizing aggressiveness different than the first planarizing aggressiveness.