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:
Mar. 11, 1997
Filed:
Jun. 18, 1996
Hidenori Watanabe, Hiratsuka, JP;
Junichi Hoshi, Hadano, JP;
Yutaka Yuge, Mishima, JP;
Akira Okita, Ayase, JP;
Hideshi Kuwabara, Zama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A bipolar transistor having a control electrode area of a semiconductor of a first conductive type, and first and second main electrode areas positioned in contact with the control electrode area and composed of a semiconductor of a second conductive type different from the first conductive type, comprises, for the purpose of preventing depletion of the surface of the control electrode area and suppressing or annulating the current generated in the surfacial depletion area, an electrode for controlling the surface state of the control electrode area, positioned, across an insulation film, on the surface of the control electrode area including the vicinity of the junction between the control electrode area and the above-mentioned first main electrode area.