Patent ID: 6319743
Filing Date: 2001-11-20
Classification: G01L

Abstract:
A method of forming a piezoresistive semiconductor sensor gauge comprising the steps of:preparing at least a first surface of a substrate having two opposed surfaces;depositing a dielectric insulative layer on the first surface of the substrate;depositing a doped semiconductor layer on top of the dielectric insulated layer, said semiconductor layer having a high resistivity as deposited;annealing the doped semiconductor layer in one or more selected regions to lower resistivity of the semiconductor layer in the one or more selected regions and define therein one or more sensor gauges comprised of the annealed semiconductor material;removing surface oxidation and/or contaminants caused by the annealing step; andapplying electrical contacts adjacent to annealed semiconductor material, said contacts overlying at least a portion of said annealed semiconductor material.