Patent ID: 6265238
Filing Date: 2001-07-24
Classification: G01P

Abstract:
A manufacturing method for an electrostatic capacitive sensor, comprising the steps of:forming an electrically conductive region in part of a semiconductor single-crystal silicon layer which forms a silicon-on-insulator substrate;decreasing the thickness of a semiconductive region of said single-crystal silicon layer and the thickness of part of said electrically conductive region located adjacent to said semiconductive region;separating said semiconductive region and said electrically conductive region of said single-crystal silicon layer by forming a clearance at or in the vicinity of the interface therebetween;forming an insulating portion inside said clearance;forming a CV conversion circuit in said semiconductive region;electrically connecting an input terminal of said CV conversion circuit to said electrically conductive region via a lead line; andforming a sensing unit in said electrically conductive region, said sensing unit being electrically connected to said lead line.