Patent · US Expired

Semiconductor pressure sensor including reference capacitor on the same substrate

US6051853A · kind A · utility

38Cited by
3References
27Claims
0Family size

Assignees

Inventors

Key dates

Filing dateOct 3, 1997
Grant dateApr 18, 2000
Priority date
Expiry dateOct 3, 2017

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01L9/125
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A semiconductor pressure sensor utilizing electrostatic capacitance has a plurality of pressure sensing electrostatic capacitances and a reference electrostatic capacitance formed on one side of a silicon chip. As a movable electrode, the pressure sensing electrostatic capacitances each have a diaphragm, which may have a displacement portion composed of a central area thereof, and a peripheral portion which is more deformable than the central portion.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.