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:
Aug. 06, 2013
Filed:
Oct. 22, 2010
Che-i Kao, Tainan County, TW;
Chih-kung Lee, Taipei, TW;
Wen-ching Ko, Kaohsiung, TW;
Chang-ho Liou, Changhua County, TW;
Ing-yih Leu, Taipei, TW;
Ming-daw Chen, Hsinchu, TW;
Yi-jen Chan, Taoyuan County, TW;
Chien-kai Tseng, Taipei, TW;
Che-I Kao, Tainan County, TW;
Chih-Kung Lee, Taipei, TW;
Wen-Ching Ko, Kaohsiung, TW;
Chang-Ho Liou, Changhua County, TW;
Ing-Yih Leu, Taipei, TW;
Ming-Daw Chen, Hsinchu, TW;
Yi-Jen Chan, Taoyuan County, TW;
Chien-Kai Tseng, Taipei, TW;
Industrial Technology Research Institute, Hsinchu, TW;
National Taiwan University, Taipei, TW;
Abstract
An electret diaphragm and a speaker using the same are provided. The electret diaphragm includes an electret layer, a bonding layer adhered to a surface of the electret layer, and an aluminum (Al) electrode layer adhered on the bonding layer. The electret layer at least includes ethylene group polymer. A material of the bonding layer is ethylene-ethyl-acrylate (EEA) or ethylene-vinyl acetate (EVA).