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:
Oct. 06, 1998
Filed:
Jun. 11, 1996
Atsushi Noma, Osaka, JP;
Daisuke Ueda, Osaka, JP;
Matsushita Electronics Corporation, Osaka, JP;
Abstract
A ferroelectric capacitor comprising a lower electrode, a ceramic capacity film made of a ferroelectric substance and an upper electrode is provided on a substrate insulating film formed on a semiconductor substrate. A layer insulating film is formed on the semiconductor substrate so as to cover the ferroelectric capacitor. An electrode wiring is formed on the layer insulating film. A length L of the surface of the ceramic capacity film which is present between an intersection of the side of the upper electrode and the upper face of the ceramic capacity film and an intersection of the side of the ceramic capacity film and the upper face of the lower electrode and a thickness D of the ceramic capacity film have a relationship of L.gtoreq.2D.