Patent ID: 9539694
Date: 2017-01-10
CPC Classifications: B24B,B29C,G02B,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 continuous non-fugitive polymeric phase; wherein the first continuous non-fugitive polymeric phase has a plurality of interconnected periodic recesses having an average recess depth, D wherein the average recess depth, D wherein the plurality of interconnected periodic recesses are occupied with the second continuous non-fugitive polymeric phase; wherein the first continuous non-fugitive polymeric phase has an open cell porosity of ≦6 vol %; wherein the first continuous non-fugitive polymeric phase has a plurality of hollow core polymeric materials; wherein the plurality of hollow core polymeric materials is incorporated in the first continuous non-fugitive polymeric phase at 1 to 58 vol %; wherein the second continuous non-fugitive polymeric phase contains an open cell porosity of ≧10 vol %; wherein the second continuous non-fugitive polymeric phase occupying the plurality of interconnected periodic recesses has an average height, H wherein an absolute value of a difference, ΔS, between the average thickness, T