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:
Nov. 21, 2000
Filed:
May. 25, 1999
Shuji Sone, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A thin-film capacitor having a perovskite-structured polycrystalline oxide thin-film as its dielectric, that exhibits an excellent insulation property is provided. This capacitor comprises a perovskite-structured, polycrystalline oxide thin-film, and top and bottom electrodes located at each side of the thin-film The perovskite-structured, polycrystalline oxide thin-film has a general formula of ABO.sub.3, where A is at least one element selected from the group consisting of bivalent metallic elements, lead, and lanthanum, and B is at least one element selected from the group consisting of quadrivalent metallic elements. A ratio of (A/B) is in a range from 1.1 to 2.0. The oxide thin-film has granular crystal grains. The perovskite-structured, polycrystalline oxide thin-film is formed by forming a perovskite-structured, amorphous oxide thin-film and by crystallizing the perovskite-structured, amorphous oxide thin-film due to heat treatment.