Patent ID: 6354919
Filing Date: 2002-03-12
Classification: B24B,B24D

Abstract:
A web-format planarizing machine, comprising:a stationary planarizing table having a planarizing zone; at least one roller proximate to the table; a carrier assembly having a head for holding a microelectronic substrate assembly, the head being moveable over the table; and a polishing pad having an active section on the planarizing zone of the table and an inactive section wrapped around the roller, the polishing pad including 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, the polishing pad further having a first planarizing structure in the interior region of the planarizing medium and a second planarizing structure in each of the first and second side regions of the planarizing medium, the first planarizing structure having a first planarizing aggressiveness and the second planarizing structure having a second planarizing aggressiveness less than the first planarizing aggressiveness.