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:
Jul. 12, 1988
Filed:
Apr. 24, 1987
James A Greer, Andover, MA (US);
Raytheon Company, Lexington, MA (US);
Abstract
A surface acoustic wave device includes a substrate which supports surface acoustic wave propagation having a predetermined surface acoustic wave velocity characteristic and a pair of interdigitated transducers coupled to said surface wave propagation surface. The pair of interdigitated transducers are spaced by a region of said surface wave propagation surface. To adjust the surface wave velocity characteristic of said surface wave device, a thin layer of a nonconducting elastic material, such as aluminum oxide or zinc sulfide is deposited onto a portion of the region disposed between the pair of interdigitated transducers, to change the surface wave velocity characteristic of the surface wave device.