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:
Sep. 27, 1977
Filed:
Sep. 09, 1976
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Seikosha, , JA;
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
29 2535 ; 29593 ; 2191 / ; 310312 ;
Abstract
A method of adjusting the frequency and temperature coefficient of a GT cut quartz oscillator comprises starting with a blank of approximately the frequency desired. An electrode film is deposited on the front and rear faces of the blank. The side ratio between a longer side and a shorter side is adjusted to obtain a zero temperature coefficient. Thereafter portions of the electrode film along the longer sides of the oscillator are removed to reduce the area of the electrode film so as to obtain the desired frequency without changing the side ratio and thus without disturbing the zero temperature coefficient.