Patent ID: 8049297
Filing Date: 2011-11-01
Classification: H01L

Abstract:
1. A semiconductor structure, comprising: a semiconductor material; a first cavity that extends into the semiconductor material from a first surface of the semiconductor material at least about one micron or greater, having void space or an electrically non-conductive material inside the first cavity, or combinations thereof; a first protrusion extending from a first boundary of the first cavity a distance of at least about one micron or greater; a first dielectric material over the first cavity, over at least a portion of the first surface of the semiconductor material, and over at least a portion of a first surface of the first protrusion, wherein the first dielectric material has a first opening over a portion of the cavity, wherein the width of the first cavity is more than about two times (2×) the width of the first opening and the width of the first cavity is more than about two times (2×) the width of the first protrusion, wherein the first dielectric material is rigid or substantially rigid and further comprising: a second dielectric material over the first dielectric material, wherein a portion of the second dielectric is in the first opening of the first dielectric material to seal the first cavity; a third dielectric material over the second dielectric material, wherein the third dielectric material has a planar surface or a substantially planar surface; an electrically conductive material over at least a portion of the third dielectric material, and wherein the semiconductor material comprises silicon, the first protrusion comprises silicon or silicon dioxide, or combinations thereof, the first dielectric material comprises silicon dioxide (SiO