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. 24, 1987
Filed:
Dec. 21, 1984
Ikunori Takata, Itami, JP;
Takayuki Kitamura, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention comprises a power semiconductor device in which a bipolar transistor and a diode are formed in antiparallel in a semiconductor chip with an emitter electrode (21) on one surface of the transistor (16) serving also as an anode electrode of the diode and a collector electrode (23) on another surface of the transistor serving also as a cathode electrode of the diode. A plurality of emitter lead wires (24) of the power transistor serving also as anode lead wires of the diode are connected in the anode region of the diode. Thus, electric current is made to flow from the anode region of the diode to the cathode thereof if a short circuit occurs, so that the lead wires can be prevented from being melted by large current.