Patent ID: 6485356
Filing Date: 2002-11-26
Classification: B24B,B24D,H01L,Y10S

Abstract:
A combination of a metal-containing substrate, a fixed abrasive polishing pad, and a planarizing liquid comprising:a microelectronic substrate having a first metal material and a second metal material different from the first metal material; a fixed abrasive polishing pad that includes a suspension medium having a planarizing surface for engaging the microelectronic substrate, the suspension medium including a plurality of abrasive elements distributed in the suspension medium proximate to the planarizing surface; and a planarizing liquid disposed on the planarizing surface to at least partially chemically remove at least one of the first metal material and the second metal material, the planarizing liquid and the abrasive elements together having a first removal rate of the first metal material when the planarizing surface is engaged with the microelectronic substrate and at least one of the microelectronic substrate and the suspension medium is moved relative to the other, and the planarizing liquid 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.