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. 21, 2023
Filed:
Mar. 04, 2019
Daishinku Corporation, Kakogawa, JP;
Hiroki Fujiwara, Kakogawa, JP;
Daishinku Corporation, Kakogawa, JP;
Abstract
A through hole formed in an AT-cut crystal plate includes an inclined surface () that extends from a peripheral area toward a penetrating part () in a center part of the through hole. The inclined surface () includes: a first crystal surface Sthat extends from the penetrating part () toward the peripheral area of the through hole in a −Z' and a +X directions; a second crystal surface Sthat extends from the penetrating part () toward the peripheral area of the through hole in the −Z′ and the +X directions and that contacts with the first crystal surface Sin the +Z′ and the +X directions of the first crystal surface Sand a third crystal surface Sthat contacts with the second crystal surface Sin the +X direction of the second crystal surface Sand that contacts with the main surface of the AT-cut crystal plate. A compensation surface Sc is formed between the main surface of the AT-cut crystal plate and the three crystal surfaces Si to Sto prevent first and second ridge lines Land Lfrom reaching the main surface of the AT-cut crystal plate.