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:
Feb. 22, 2011
Filed:
Mar. 11, 2008
Bang-hao Wu, Kaohsiung, TW;
Li-duan Tsai, Hsinchu, TW;
Min-lin Lee, Hsinchu, TW;
Cheng-liang Cheng, Hsinchu, TW;
Bang-Hao Wu, Kaohsiung, TW;
Li-Duan Tsai, Hsinchu, TW;
Min-Lin Lee, Hsinchu, TW;
Cheng-Liang Cheng, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A through hole capacitor at least including a substrate, an anode layer, a dielectric layer, a first cathode layer, and a second cathode layer is provided. The substrate has a plurality of through holes. The anode layer is disposed on the inner surface of at least one through hole, and the surface of the anode layer is a porous structure. The dielectric layer is disposed on the porous structure of the anode layer. The first cathode layer covers a surface of the dielectric layer. The second cathode layer covers a surface of the first cathode layer, and the conductivity of the second cathode layer is greater than that of the first cathode layer. The through hole capacitor can be used for impedance control, as the cathode layers of the through hole are used for signal transmission.