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:
Jan. 25, 1977
Filed:
Apr. 15, 1976
Applicant:
Inventor:
Kenneth L Davis, Alexandria, VA (US);
Assignee:
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
333 / ; 310-8 ; 310-97 ; 357 23 ; 357 26 ;
Abstract
An electrically variable surface acoustic wave phase shifter including a strate upon which a piezoelectric layer is deposited and separated therefrom by an insulating layer. An electrode is deposited on the piezoelectric layer and on the bottom of the substrate with an electrical dc bias applied onto the electrodes which causes a charge accumulation or a depletion region at the silicon surface. This charge accumulation or depletion region causes the boundary conditions to change therefore causing a phase change in an acoustical wave propagating along the layered silicon surface.