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. 04, 2010
Filed:
Apr. 15, 2004
Naomi Yonemura, Shibukawa, JP;
Katsunori Yashima, Shibukawa, JP;
Yoshihiko Tsujimura, Shibukawa, JP;
Hidenori Ishikura, Shibukawa, JP;
Takashi Saiki, Shibukawa, JP;
Naomi Yonemura, Shibukawa, JP;
Katsunori Yashima, Shibukawa, JP;
Yoshihiko Tsujimura, Shibukawa, JP;
Hidenori Ishikura, Shibukawa, JP;
Takashi Saiki, Shibukawa, JP;
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A metal base circuit board to be used for a hybrid integrated circuit, including circuits provided on a metal plate via an insulating layer, a power semiconductor mounted on the circuit, and a control semiconductor to control the power semiconductor, provided on the circuit. A low capacitance portion is embedded under a circuit portion on which the control semiconductor is mounted, preferably. The low capacitance portion is made of a resin containing an inorganic filler and has a dielectric constant of from 2 to 9.