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:
Jan. 20, 2026
Filed:
Mar. 22, 2024
Aac Technologies Pte. Ltd., Singapore, SG;
Chungmin Li, Taiwan, CN;
Kianheng Goh, Batu Pahat, MY;
Qiang Dan, Shenzhen, CN;
Kahkeen Lai, Singapore, SG;
AAC Technologies Pte. Ltd., Singapore, SG;
Abstract
Acoustic sensor and manufacturing method. The acoustic sensor includes: a base including a first silicon layer, a first oxide layer and a second silicon layer stacked, and a back cavity; a second oxide layer formed on the base; a piezoelectric unit formed on the second oxide layer and including a first electrode layer, a piezoelectric layer and a second electrode layer stacked; a first slit formed at a middle portion of the second electrode layer and passing the second electrode layer, the piezoelectric layer and the first electrode layer; a second slit formed at a middle portion of the second silicon layer and passing the second silicon layer and the second oxide layer; an additional membrane filled in the first slit and not filled in the second slit. The SPL and structural reliability are effectively improved, and the material type is not limited by dry film type materials.