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. 21, 2009
Filed:
Dec. 04, 2003
Applicants:
Robert Frederick Milsom, Redhill, GB;
Hans-peter Löbl, Monschau-Imgenbroich, DE;
Inventors:
Robert Frederick Milsom, Redhill, GB;
Hans-Peter Löbl, Monschau-Imgenbroich, DE;
Assignee:
NXP B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/13 (2006.01); H03H 9/15 (2006.01); H03H 9/54 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electro-acoustic resonator () of the membrane or FBAR type () or the solidly-mounted or SBAR type (), with electrodes comprising a single conducting layer or multiple conducting layers, i.e. sandwich construction () with an optimum coupling factor kr and thus an improved filter bandwidth. The optimum coupling factor kr is achieved by the arrangement that the top electrode () is thinner than the bottom electrode (). The coupling factor is independent of the resonator's layout defined by the mask.