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:
Dec. 05, 2023
Filed:
May. 18, 2021
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Tomoaki Matsushita, Nagaokakyo, JP;
Kazuhiro Ebara, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Nagaokakyo, JP;
Abstract
An ultrasonic sensor having a case including a bottom section and a peripheral wall section; a piezoelectric device on the bottom section inside the case; and a resin foam filler filling at least part of the case and covering the piezoelectric device. An inner surface of the case includes a first region and a second region, a surface roughness of the first region is higher than a surface roughness of the second region, the first region includes at least part of the bottom section and/or a portion of the peripheral wall section facing the piezoelectric device, the second region is on the peripheral wall section and is farther from the piezoelectric device than the first region, and the resin foam filler contacts each of the first region and the second region.