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:
Jan. 31, 2017
Filed:
Oct. 18, 2012
Csem Centre Suisse D'electronique ET DE Microtechnique Sa—recherche ET Developpement, Neuchatel, CH;
Terunobu Akiyama, Neuchatel, CH;
Abstract
The invention concerns a pressure transducer comprising a deflecting membrane, said membrane comprising two piezoresistors () of different types, said piezoresistors being arranged such that a same stress or a same strain is applied on said piezoresistors and said piezoresistors () yield changes in resistance, wherein a piezoresistor of a first type () is positioned such that its current direction is perpendicular to the stress direction (trans verse) and a piezoresistor of a second type is parallel to the stress direction (longitudinal), allowing, when a tensile stress is applied to the transducer, said piezoresistor of the first type to increase its resistance and said piezoresistor of the second type to decrease the resistance; or when a compressive stress is applied to the transducer, said piezoresistor of the first type to decrease its resistance and said piezoresistor of the second type to increase the resistance; wherein said piezoresistor of the first type () has a specific width and a length as short as possible and said piezoresistor () of the second type has a width as short as possible and a length as long as possible.