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. 23, 1996
Filed:
May. 30, 1995
Hidetoshi Nakanishi, Kawasaki, JP;
Satoshi Yanagisawa, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A plurality of segments of small-sized IGBT devices are arranged concentrically in a plurality of rows in a pellet substrate. Each segment has an independent polysilicon gate electrode layer. A gate electrode terminal lead-out portion is provided at a central portion of the pellet substrate. A metal gate electrode layer electrically connects the polysilicon gate electrode layer of at least one of the segments of a unit, which unit is constituted by at least one of the segments arranged radially from the central portion of the pellet substrate towards a peripheral portion of the pellet substrate, to the gate electrode terminal lead-out portion. The metal gate electrode layer includes a trunk wiring portion extending radially from the gate electrode terminal lead-out portion, and a branch wiring portion extending from the trunk wiring portion in a circumferential direction of the pellet substrate and electrically connected to the polysilicon gate electrode layer of each segment. The polysilicon gate electrode layer is rectangular, and the branch wiring portion is connected to the polysilicon gate electrode layer along three peripheral sides of the polysilicon gate electrode layer. The pellet substrate is clamped under pressure between an emitter pressure-contact plate and a collector pressure-contact plate.