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:
Jun. 27, 2006
Filed:
Mar. 01, 2004
Kazuhiro Mochizuki, Tokyo, JP;
Isao Ohbu, Sagamihara, JP;
Tomonori Tanoue, Machida, JP;
Chisaki Takubo, Kodaira, JP;
Kenichi Tanaka, Kodaira, JP;
Kazuhiro Mochizuki, Tokyo, JP;
Isao Ohbu, Sagamihara, JP;
Tomonori Tanoue, Machida, JP;
Chisaki Takubo, Kodaira, JP;
Kenichi Tanaka, Kodaira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The gist of the present invention is as follows: In a monolithic microwave integrate circuit (MMIC) using a heterojunction bipolar transistor (HBT), via holes are respectively formed from the bottom of the MMIC for the emitter, base and collector. Of the via holes, one is located so as to face the HBT. The respective topside electrodes for the other via holes located so as not to face the HBT are provided in contact with the MMIC substrate.