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:
Sep. 02, 2025
Filed:
Jul. 10, 2023
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Koichiro Kawasaki, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A multiplexer includes first and second filters, a resin layer, and an electrically conductive layer. A pass band of the first filter is different from a pass band of the second filter. The first filter is in contact with an electrically conductive layer, and the second filter is not in contact with the electrically conductive layer. The second filter has a greater thermal resistance value than the first filter, and lowers the pass band in response to a temperature rise. A region of the piezoelectric substrate closer to the first filter is a first region, and a region of the piezoelectric substrate farther from the first filter is a second region. Areas in the first and second regions where an acoustic wave resonator included in a parallel-arm circuit is provided are first and second areas. The second area is greater than the first area.