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:
Jul. 10, 2012
Filed:
Apr. 28, 2009
Applicants:
Hsin-li Lee, Hsinchu County, TW;
Chin-horng Wang, Hsinchu, TW;
Cheng-hsin Chuang, Tainan, TW;
Jin-yao Lai, Taichung, TW;
Inventors:
Hsin-Li Lee, Hsinchu County, TW;
Chin-Horng Wang, Hsinchu, TW;
Cheng-Hsin Chuang, Tainan, TW;
Jin-Yao Lai, Taichung, TW;
Assignee:
Industrial Technology Research Institute, Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 25/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A micro-speaker and a manufacturing method thereof are provided. The micro-speaker has a sandwich structure. The micro-speaker includes two piezoelectric material layers and a diaphragm disposed between the two piezoelectric material layers, where the piezoelectric material layers have a ring-shaped structure. The problem of insufficient sound pressure at low frequency is resolved, and the flexibility of the micro-speaker is improved.