Patent ID: 7598588
Filing Date: 2009-10-06
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor material having a first surface and a second surface parallel to, or substantially parallel to, the first boundary; a plurality of pinwheel structures, wherein the plurality of pinwheel structures comprise silicon dioxide and extend from the first surface of the semiconductor material toward the second surface; and a dielectric structure disposed in said semiconductor material, said dielectric structure comprising said plurality of pinwheel structures, said pinwheel structures defining a plurality of voids formed therein to reduce a dielectric constant of the dielectric structure by about 30% or greater and wherein the plurality of pinwheel structures are patterned to comprise a plurality of orthogonally walled structures such that stress vectors from abutting cells of the dielectric structure are aligned in opposite directions to reduce stress in the dielectric structure.