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:
May. 24, 2011
Filed:
Dec. 19, 2008
Mitsuo Iwatate, Chiba, JP;
Yoshifumi Nishino, Chiba, JP;
Mitsuo Iwatate, Chiba, JP;
Yoshifumi Nishino, Chiba, JP;
Seiko Instruments, Inc., , JP;
Abstract
A piezoelectric oscillator which can conduct fine trimming adjustment and adjust frequencies highly precisely, particularly with no use of an expensive laser trimming apparatus with a small spot diameter, and a method of the same are provided. The method includes: a first step wherein a first spot train is formed on a mass adjustment film at a pitch smaller than the diameter of a film removal spot matched with the spot diameter of laser, and a second step wherein a train space to the first spot train is adjusted in accordance with the target frequency of a tuning fork crystal vibrating piece to form a second train and after, and these steps are in turn conducted, whereby fine trimming adjustment is performed.