Patent ID: 8377351

Claim:
A method of forming a chemical-mechanical planarization polishing pad comprising: providing a composition, the composition including a network of elements in the form of a fabric and at least one of a polymer or a reactive prepolymer wherein said polymer or prepolymer is dispensed over said elements in a mold; introducing a first gas to the composition; using the gas to produce a plurality of voids in the composition wherein said voids define a space of 0.1 μm 3 to 1,000,000 μm 3 ; and forming a polishing pad including said network of elements in the form of said fabric dispersed within said polymer or said reactive prepolymer including said plurality of voids formed in the pad, wherein at least a portion of said network of elements is connected to at least a portion of said voids and wherein said network of elements comprises a plurality of soluble fibers wherein said fibers have a length in the range of 0.1 mm to 500 mm and a diameter in the range of 0.1 μm to 100 μm and are present at a level of 2% to 75% by volume of the polishing.