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. 21, 1992
Filed:
May. 13, 1991
Tsuneo Ogura, Yokohama, JP;
Katsuhiko Takigami, Yokohama, JP;
Akio Nakagama, Hiratsuka, JP;
Tomokazu Domon, Yokosuka, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
There is disclosed a double gate GTO thyristor having a high gate gain and a high gate sensitivity, and capable of high speed turn-off. The double gate GTO thyristor comprises an anode/emitter layer, first and second base layers and cathode/emitter layer. A semiconductor layer having a conductivity type opposite to that of the anode/emitter layer is formed in the anode/emitter layer and located at a surface portion of the anode/emitter layer. A first gate electrode is connected to the first base layer, and a second gate electrode to the second base layer. An anode electrode is connected to the anode/emitter layer and all the surface of the semiconductor layer. A cathode electrode is connected to the cathode/emitter layer.