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:
Oct. 10, 2006
Filed:
Aug. 02, 2002
Hans Peter Loebl, Monschau-Imgenbroich, DE;
Mareike Katharine Klee, Hueckelhoven, DE;
Robert Frederick Milsom, Redhill, GB;
Christof Metzmacher, Aachen, DE;
Wolfgang Brand, Aachen, DE;
Hans Peter Loebl, Monschau-Imgenbroich, DE;
Mareike Katharine Klee, Hueckelhoven, DE;
Robert Frederick Milsom, Redhill, GB;
Christof Metzmacher, Aachen, DE;
Wolfgang Brand, Aachen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a filter device equipped with at least one bulk acoustic wave resonator, which comprises a resonator unit and a reflection element () comprising several layers (). The layers () each comprise a mixture of at least two materials. Within each layer (), the composition of the mixture varies continuously and periodically relative to the layer thickness.