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. 14, 1981
Filed:
Jan. 21, 1980
Applicant:
Inventors:
Peter S Cross, Palo Alto, CA (US);
William R Shreve, Sunnyvale, CA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B44C / ; C03C / ; C03C / ; C23F / ;
U.S. Cl.
CPC ...
156627 ; 156643 ; 156646 ; 156656 ; 156657 ; 2041 / ; 324 56 ;
Abstract
A process is provided for trimming a SAW device while the device is energized and operating at its center frequency. By essentially selectively sputter-etching the substrate or the transducer material only, without requiring a masking operation, the center frequency and other electrical characteristics of the SAW device are trimmed in a precise and controlled manner.
Cross, Peter. (1981). Frequency trimming of surface acoustic wave devices (U.S. Patent No. 4278492). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4278492
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile