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. 27, 2010
Filed:
Jul. 16, 2004
Morio Onoe, Tokyo, JP;
Hitoshi Sekimoto, Kanagawa, JP;
Morio Onoe, Tokyo, JP;
Hitoshi Sekimoto, Kanagawa, JP;
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
The outer shape of a quartz crystal blank is processed to have a predetermined shape, thereby providing an SC cut crystal resonator capable of reliably and reproducibly suppressing B mode resonance. In this SC cut crystal resonator, the surface of the quartz crystal orthogonal to the Y axis is rotated through 33° to 35° about the X axis and is then rotated from this rotated position through 22° to 24° about the Z axis, and a slender quartz crystal blank oblong in an X' axis direction is cut from the rotated surface. The end surface of the quartz crystal blank orthogonal to the Z′ axis is tilted in a direction rotated through +7° to +13° or −7° to −13° about the X′ axis.