Patent ID: 6211772
Filing Date: 2001-04-03
Classification: G01L

Abstract:
A semiconductor composite sensor comprising:at least two detection regions, each detection region including:a sensor substrate having a first p-type semiconductor region and a first n-type semiconductor region formed on said first p-type semiconductor region;a piezo-resistive element having a second p-type semiconductor region formed in a part of said first n-type semiconductor region and having a resistance value which changes in accordance with a pressure applied thereto;an isolating means surrounding said piezo-resistive element formed to extend through said first n-type semiconductor region and communicate with said first p-type semiconductor region;the piezo-resistive elements in said detection regions being serially interconnected; andeach piezo-resistive element having a first electrode adapted for connection to a higher potential and a second electrode adapted for connection to a lower potential, said first electrode also contacting said first n-type semiconductor region in its associated detection region.