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. 05, 2009
Filed:
May. 23, 2006
Chang-sheng Chen, Taipei, TW;
Uei-ming Jow, Taichung, TW;
Ying-jiunn Lai, Pingtung County, TW;
Chin-sun Shyu, Pingtung County, TW;
Chang-Sheng Chen, Taipei, TW;
Uei-Ming Jow, Taichung, TW;
Ying-Jiunn Lai, Pingtung County, TW;
Chin-Sun Shyu, Pingtung County, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A multi-layered printed circuit board embedded with a filter, the multi-layered printed circuit board using a composite multi-layered printed circuit board formed of at least a high dielectric material stacked with at least a low dielectric material. A plurality of serial or parallel capacitors are disposed in the composite multi-layered printed circuit board so as to form a filter. At least one capacitor is an interdigital capacitor disposed on a low dielectric material. Metal electrodes of the interdigital capacitor are located on the same plane such that the area of the metal electrodes or the spacing between the metal electrodes can be adjusted in advance to precisely control the electrical properties such as the center frequency and the transmission loss of the filter. Problems resulting from alignment errors caused in manufacturing the composite multi-layered printed circuit board can also be prevented.