Patent ID: 6331135
Filing Date: 2001-12-18
Classification: B24B,B24D,H01L,Y10S

Abstract:
A combination of a metal-containing substrate and a fixed abrasive polishing pad, comprising:a microelectronic substrate having a feature with a first metal material having a first composition and a second metal material adjacent to the first metal material having a second composition different than the first composition;a fixed abrasive polishing pad that includes a suspension medium having a planarizing surface for planarizing the microelectronic substrate; anda plurality of abrasive elements distributed in the suspension medium proximate to the planarizing surface, the suspension medium and the abrasive elements together having a first removal rate of the first metal material when the suspension medium is engaged with the microelectronic substrate and at least one of the microelectronic substrate and the suspension medium is moved relative to the other, the suspension medium and the abrasive elements together having a second removal rate of the second metal material when the suspension medium body is engaged with the microelectronic substrate and at least one of the microelectronic substrate and the suspension medium is moved relative to the other, a ratio of the first removal rate to the second removal rate being less than or equal to approximately two.