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:
Sep. 29, 1992
Filed:
Aug. 31, 1990
Munenari Kondo, Mie, JP;
Masahito Imai, Aichi, JP;
Ryoichi Narita, Aichi, JP;
Takushi Maeda, Aichi, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A semiconductor strain sensor having a stem with a lead hole in which a lead terminal is installed and electrically coupled to an external circuit. A sensor chip having piezo-resistors to a bride circuit is joined with a front surface of the stem. A shell is joined with the front surface of the stem by projection welding after the back surface of the stem is flattened to within a predetermined limit. A space formed by the shell and stem is filled with a damping liquid. The stem is integrally coupled to the sensor chip through an adhesive, and spacers are added to the adhesive to keep the thickness of the adhesive to a predetermined value. This arrangement can effectively prevent propagation of the welding strain of the stem from adversely affecting the sensor chip.