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. 28, 1999
Filed:
Oct. 27, 1997
Applicant:
Inventors:
John Edwin Graebner, Short Hills, NJ (US);
Sungho Jin, Millington, NJ (US);
Wei Zhu, Warren, NJ (US);
Assignee:
Lucent Technologies Inc., Murray Hill, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H03H / ;
U.S. Cl.
CPC ...
3103 / ; 333201 ; 3103 / ;
Abstract
In accordance with the invention, the operating frequency of a SAW device is magnetically tuned. In a first embodiment, the SAW device comprises a piezoelectric layer mechanically coupled to a substrate or body of magnetostrictive material. Strains magnetically induced in the magnetostrictive substrate is coupled to the piezoelectric layer, altering the velocity at which it can transmit acoustic waves. In an alternative embodiment, surface waves are directly generated in a magnetostrictive material and the velocity is directly altered by an applied magnetic field.