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. 28, 2021
Filed:
Aug. 10, 2020
Aac Acoustic Technologies (Shenzhen) Co., Ltd., Shenzhen, CN;
AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD., Shenzhen, CN;
Abstract
The invention provides a piezoelectric micro-electromechanical systems (MEMS) microphone having a base with a cavity, a piezoelectric diaphragm, and a limit element. The base has a ring base, and a support column. The piezoelectric diaphragm includes diaphragm sheets. Each diaphragm sheet have a fixing end connected with the support column and a free end suspended above the cavity. The limit element includes a limit part arranged apart from the piezoelectric diaphragm to limit the free ends in vibration directions of the diaphragm sheets, and an edge fixing plate connected with the outer edge of the limit part and arranged on the ring base. When the diaphragm sheets greatly deform upwards under impact force, deformation of the diaphragm sheets can be controlled, and the diaphragm sheets are protected to prevent the diaphragm sheets from breaking, thereby improving the stability of the piezoelectric MEMS microphone.