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:
May. 05, 2026
Filed:
Feb. 08, 2021
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Abstract
An ultrasonic sensor that is less affected by humidity change is obtained. Ultrasonic sensor () is configured by sequentially laminating piezoelectric element (), metal housing (), first acoustic matching layer (), and second acoustic matching layer (). First acoustic matching layer () adjacent to piezoelectric element () with metal housing () interposed therebetween includes a thermoplastic resin and an inorganic filler. The weight fraction of the inorganic filler in first acoustic matching layer () is set to less than or equal to 30% and the weight fraction of the hollow structure filler in the inorganic filler is set to less than or equal to 50%.
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