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. 20, 2021
Filed:
Sep. 28, 2020
Ngk Insulators, Ltd., Nagoya, JP;
NGK INSULATORS, LTD., Nagoya, JP;
Abstract
A bonded body includes a supporting substrate, a piezoelectric single crystal substrate and a bonding layer provided between the supporting substrate and piezoelectric single crystal substrate. The bonding layer has a composition of SiO(x represents an oxygen ratio). The oxygen ratio x at a central part in a thickness direction of the bonding layer is higher than an oxygen ratio x at an end part of the bonding layer on a side of the piezoelectric single crystal substrate and an oxygen ratio x at an end part of the bonding layer on a side of the supporting substrate. The oxygen ratio at the central part in the thickness direction of the bonding layer is 0.013 or higher and 0.666 or lower.