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:
Apr. 13, 2021
Filed:
Mar. 12, 2018
Sumitomo Electric Industries, Ltd., Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A layered body includes a ceramic substrate formed of a polycrystalline ceramic and having a supporting main surface and a piezoelectric substrate formed of a piezoelectric material and having a bonding main surface that bonds to the supporting main surface through Van der Waals force. The ceramic substrate includes a supporting main surface amorphous layer formed so as to include the supporting main surface. The piezoelectric substrate includes a bonding main surface amorphous layer formed so as to include the bonding main surface. The supporting main surface amorphous layer has a smaller thickness than the bonding main surface amorphous layer.