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:
Nov. 18, 2025
Filed:
Jan. 28, 2022
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Nagaokakyo, JP;
Abstract
A crystal vibrator that includes a crystal vibration element having a crystal piece and a pair of electrodes that face each other with the crystal piece interposed therebetween; and a holder that accommodates the crystal vibration element. At least one electrode of the pair of electrodes includes an upper layer containing gold and a lower layer between the crystal piece and the upper layer and containing chromium. A surface of the at least one electrode contains a plurality of crystal grains composed of gold and a chromium compound along grain boundaries between the plurality of crystal grains. An area percentage of the plurality of crystal grains is equal to or more than 35% and equal to or less than 60% when the surface of the at least one electrode is viewed in a plan view thereof.