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:
Feb. 12, 1991
Filed:
Nov. 17, 1989
Applicant:
Inventors:
Engel Gunter, Leitring, AT;
Peter W Krempl, Graz/Ragnitz, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310360 ;
Abstract
In order to improve the temperature stability of piezoelectric and elastic properties of piezoelectric crystal elements based on GaPO.sub.4, preferably for resonator applications, and to facilitate alignment when the crystal elements are cut from the raw crystal bars, the proposal is put forward that the principal plane H of the crystal element be parallel to a cutting plane, which is generated by rotating a hexagonal prism face of a raw crystal bar, which lies parallel to the optical axis, around one of the two-fold crystallographic symmetry axes a.sub.1, a.sub.2 or a.sub.3 through an angle .theta. of -5.degree. to -22.degree..