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:
Apr. 19, 2005
Filed:
Jul. 08, 2004
Mark J. Beck, Los Gatos, CA (US);
Richard B. Vennerbeck, Los Gatos, CA (US);
Raymond Y. Lillard, Redwood City, CA (US);
Eric G. Liebscher, San Jose, CA (US);
Mark J. Beck, Los Gatos, CA (US);
Richard B. Vennerbeck, Los Gatos, CA (US);
Raymond Y. Lillard, Redwood City, CA (US);
Eric G. Liebscher, San Jose, CA (US);
Product Systems Incorporated, Campbell, CA (US);
Abstract
A transducer comprising an acoustic energy generating means and a resonator. The acoustic energy generating means generates acoustic energy and is adapted for delivering an approximately uniform amount of acoustic energy to each unit of surface area on a substrate in a given time period when the substrate is rotating. The acoustic energy generating means has a surface area that is less than the surface area of the substrate, and may comprise a wedge shaped piezoelectric crystal. A resonator is attached to the acoustic energy generating means for transmitting the acoustic energy to the substrate.