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:
May. 05, 1992
Filed:
Sep. 18, 1990
Ikunori Takata, Fukuoka, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Disclosed herein is such multilayer electrode structure of transistor and thyristor that a second electrode region serving as an upper layer electrode region is formed on a second semiconductor region which is an active region and an insulating film which is formed on a first electrode region serving as an underlayer electrode region, whereby the second electrode region is directly in contact with the second semiconductor region for electrical connection. According to such electrode structure, the second electrode region is also formed on the insulating film while being in stable electrical connection with the second semiconductor region even if the same is formed by vacuum deposition. Thus, it is possible to obtain a semicondutor device having multilayer structure, which can be fabricated at a low cost and is excellent in electrode forming area efficiency.