The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 2024
Filed:
Aug. 25, 2021
Alps Alpine Co., Ltd., Tokyo, JP;
Hisayuki Yazawa, Niigata-ken, JP;
Hisanobu Okawa, Niigata-ken, JP;
Masahiko Ishizone, Niigata-ken, JP;
Toru Takahashi, Niigata-ken, JP;
Ayako Otsuka, Niigata-ken, JP;
ALPS ALPINE CO., LTD., Tokyo, JP;
Abstract
A pressure sensor includes a diaphragm on a silicon substrate and a plurality of piezoelectric element areas that change in resistance according the distortion of the diaphragm. The plurality of piezoelectric element areas of the pressure sensor include a first piezoelectric element area, a second piezoelectric element area, a third piezoelectric element area, and a fourth piezoelectric element area. The diaphragm has a maximum deflection area whose stress becomes 80% or more of a maximum stress when distorted by a predetermined pressure. The first piezoelectric element area, the second piezoelectric element area, the third piezoelectric element area, and the fourth piezoelectric element area are disposed in the maximum deflection area.