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:
Mar. 23, 2004
Filed:
Sep. 28, 2000
Applicant:
Inventor:
John Hong, Thousand Oaks, CA (US);
Assignee:
Rockwell Technologies, LLC., Thousand Oaks, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 4/108 ;
U.S. Cl.
CPC ...
H01L 4/108 ;
Abstract
Acoustic wave characteristics varied by illumination of the acoustic wave propagation medium. An acoustic wave is generated and propagated on or through a medium, typically a piezoelectric substrate. The medium is illuminated, creating a charge grating. The velocity of the acoustic wave is altered and certain frequency components of the acoustic wave are reflected. Transducers may be used to extract the selected frequency. The characteristics of the illumination, including, among others, the wavelength and the intensity, may be varied to produce various acoustic wave velocities and to select particular acoustic wave frequency components.