Patent ID: 9630293
Date: 2017-04-25
CPC Classifications: B24B,B29C,G02B,H01F,H01L

Claim:
1. A chemical mechanical polishing pad, comprising: a polishing layer having a polishing surface, a base surface and an average thickness, T wherein the polishing layer comprises a first continuous non-fugitive polymeric phase and a second non-fugitive polymeric phase; wherein the first continuous non-fugitive polymeric phase has a plurality of periodic recesses having an average recess depth, D wherein the average recess depth, D wherein the plurality of periodic recesses are occupied with the second non-fugitive polymeric phase; wherein the first continuous non-fugitive polymeric phase is a reaction product of a first continuous phase isocyanate-terminated urethane prepolymer having 8 to 12wt % unreacted NCO groups and a first continuous phase curative; wherein the second non-fugitive polymeric phase is selected from a second continuous non-fugitive polymeric phase and a second discontinuous non-fugitive polymeric phase; wherein the second non-fugitive polymeric phase is formed by combining a poly side (P) liquid component and an iso side (I) liquid component; wherein the poly side (P) liquid component comprises at least one of a (P) side polyol, a (P) side polyamine and a (P) side alcohol amine; wherein the iso side (I) liquid component, comprising at least one (I) side polyfunctional isocyanate; wherein the first continuous non-fugitive polymeric phase has an open cell porosity of ≦6 vol %; wherein the second non-fugitive polymeric phase contains an open cell porosity of ≧10 vol %; and, wherein the polishing surface is adapted for polishing a substrate so that the first continuous non-fugitive polymeric phase and the second non-fugitive polymeric phase wear evenly from the polishing surface.