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:
Apr. 29, 1997
Filed:
Mar. 31, 1994
Mariko Takagi, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A programmable device uses anti-fuse elements. The device has a wiring layer on an insulator film on a semiconductor substrate, and it is programmed by connected condition of this wiring. The wiring is separated, such as a first wiring line and a second wiring line on the same plane, beforehand so has been disconnected at separated nodes. A thin insulator film is formed on the disconnection nodes at least, and a further floating electrode, consisting of an aluminum alloy, is formed on the thin insulator film, so that an anti-fuse element is formed straddling the first and the second wiring. When it is programmed, in order to change the disconnected anti-fuse element into a conductive state, a destructive electric potential difference is impressed between the first and the second wiring lines through the thin insulator film. As a result, the thin insulator film is broken, so that the first and the second wiring lines are connected with the floating electrode.