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:
Jul. 08, 2008
Filed:
Oct. 28, 2004
Keiichi Nakao, Osaka, JP;
Yukio Mizukami, Fukui, JP;
Keiichi Nakao, Osaka, JP;
Yukio Mizukami, Fukui, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A load sensor includes a substrate, a glass layer provided on the substrate, a wiring provided on the glass layer, an adjusting layer provided on the glass layer, and a strain-sensitive resistor element provided on the adjusting layer and connected to the wiring. A thermal expansion coefficient of the adjusting layer is closer to that of the strain-sensitive resistor element than that of the glass layer. In this load sensor, a stress remaining inside the resistor element is reduced, and the change over time of the resistance of the element is accordingly suppressed. Therefore, a single kind of the resistor element can be formed on substrates having respective thermal expansion coefficients, shapes, and thicknesses, thereby providing various load sensors having respective specifications.