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. 22, 2008
Filed:
Jan. 19, 2006
Applicant:
Masato Ueno, Anjo, JP;
Inventor:
Masato Ueno, Anjo, JP;
Assignee:
DENSO CORPORATION, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01L 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pressure sensor includes a sensor chip in which a diaphragm is provided, and a case to which the sensor chip is directly mounted by an adhesive. A groove that surrounds the diaphragm is provided on the rear surface of the sensor chip between the bonded part and the diaphragm. The groove prevents thermal stress, which occurs at the bonded part, from reaching the diaphragm through the sensor chip, and thereby the accuracy of the sensor output is highly accurate. Further, the groove may store any excessive adhesive that may be applied when the sensor chip is bonded to the case to prevent the adhesive from flowing and adhering to the diaphragm.