Heterogeneous fluoropolymer mixture polishing pad

A polishing pad suitable for polishing at least one of semiconductor, optical, magnetic or electromechanical substrates comprising:

• a polyurea polishing layer, the polyurea polishing layer including a polyurea matrix, the polyurea matrix having a soft phase and a hard phase, the soft phase being formed from soft segments and the hard phase being formed from diisocyanate hard segments and a curative agent and wherein the hard phase is precipitated within the soft phase, the soft segment being a copolymer of aliphatic fluorine-free polymer groups and a fluorocarbon having a length of a least six carbons, the polyurea matrix being cured with the curative agent and including gas or liquid-filled polymeric microelements, the polymeric microelements having shell walls and a weight average diameter of less than 150 μm, the soft segments forming a fluorine depleted phase and a fluorine rich phase, wherein the fluorine rich phase concentrates adjacent the polymeric microelements and at the polishing layer during polishing wherein the polishing layer remains hydrophilic during polishing in shear conditions.