Patent ID: 7704853

Claim:
A method of making a semiconductor device, the method comprising: providing a semiconductor wafer, the wafer including a plurality of cavities adjacent to a surface of the semiconductor wafer, the plurality of cavities comprising crystal defects; forming a first insulation layer over the surface of the semiconductor wafer and in the plurality of cavities adjacent to the surface, the first insulation layer extending over a top surface of the semiconductor wafer and in the plurality of cavities; covering the first insulation layer with a sacrificial layer, the sacrificial layer extending over the first insulation layer over the top surface of the semiconductor wafer and in the plurality of cavities; selectively etching back the sacrificial layer in such a manner that the plurality of cavities adjacent to the surface remains filled with the sacrificial layer; forming a second insulation layer directly on the first insulation layer; and forming a conductive layer over the second insulation layer.