Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1989-03-06
1990-08-07
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Diaphragm
338 4, G01L 708, G01L 906
Patent
active
049457691
ABSTRACT:
A pressure sensor uses a monocrystalline silicon chip that has a diaphragm portion in which strain gages are formed that overlie a buried cavity. The cavity is formed by a single sided semiconductor fabrication process that includes a pair of preferential etching steps and an epitaxial deposition step.
REFERENCES:
patent: 4766666 (1988-08-01), Sugiyama et al.
patent: 4771638 (1988-09-01), Sugiyama et al.
patent: 4823605 (1989-04-01), Stein
Moss David E.
Sidner Diane W.
Yoder Douglas J.
Delco Electronics Corporation
Wallace Robert J.
Woodiel Donald O.
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