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. 19, 2026
Filed:
Apr. 11, 2022
Aac Acoustic Technologies (Shenzhen) Co., Ltd., Shenzhen, CN;
AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD., Shenzhen, CN;
Abstract
The invention provides a MEMS acoustic sensor, including: a base with a back cavity; a capacitance system fixed to the base, including a diaphragm that reciprocates in a vibration direction, a back plate spaced from the diaphragm; a first capacitor and a second capacitor formed cooperatively by the diaphragm and the back plate; and a number of through holes in the back plate facing the back cavity. The diaphragm includes a main body part opposite to the back plate for forming the first capacitor, and a plurality of combining parts recessed from the main body part. A projection of the combining part along the vibration direction completely falls into the through hole. The combining part is spaced from an inner wall of the through hole for forming the second capacitor. Due to the configuration of the invention, the acoustic sensor has improved capacitor value.