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. 24, 2006
Filed:
Aug. 02, 2005
Jun-ichi Kushibiki, Miyagi, JP;
Mototaka Arakawa, Miyagi, JP;
Yuji Ohashi, Miyagi, JP;
Yukihiro Shinozaki, Tokyo, JP;
Jun-ichi Kushibiki, Miyagi, JP;
Mototaka Arakawa, Miyagi, JP;
Yuji Ohashi, Miyagi, JP;
Yukihiro Shinozaki, Tokyo, JP;
Tohoku University, Miyagi, JP;
Chuo Precision Industrial Co., Ltd., Tokyo, JP;
Abstract
By measuring, for an ultra-low-expansion glass material, the frequency dependence of acoustic velocities and attenuation coefficients of bulk waves (longitudinal waves and shear waves), and the density, its fundamental acoustic properties are revealed, and a standard specimen for use in system calibration is prepared. By an absolute calibration method using the standard specimen, absolute values for both the LSAW and LSSCW velocities are obtained. Moreover, there are obtained relationships for the acoustic properties and the coefficient of thermal expansion to evaluate the coefficient of thermal expansion from the acoustic properties. In case there is a distribution of characteristics due to periodic striae, an accurate acoustic property distribution in the substrate can be ascertained and an evaluation performed, by selecting for the substrate a cutting angle with respect to the striae plane.