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. 25, 2006
Filed:
Jul. 26, 2005
Yorito Ota, Kobe, JP;
Kazuhiro Arai, Imaichi, JP;
Yasuyuki Toyoda, Mukoh, JP;
Shinichi Sonetaka, Ibaraki, JP;
Yorito Ota, Kobe, JP;
Kazuhiro Arai, Imaichi, JP;
Yasuyuki Toyoda, Mukoh, JP;
Shinichi Sonetaka, Ibaraki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
There is provided a bipolar transistor that enables a desirably enhanced high-frequency performance to be obtained when used as an oscillation amplifier of an oscillation circuit, and that is miniaturized and reduced in cost. A capacitance adjustment line () connected to a base pad () forms a parasitic capacitor with respect to an Ncollector substrate by interposing an insulating film () and an N collector substrate therebetween, thereby increasing collector-base capacitance C. This capacitor is incorporated into a bipolar transistor, which functions as an oscillation amplifier and has a small transistor operation region (), at least as a part of a balance capacitor constituting the oscillation circuit in the course of production of a semiconductor.