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:
Jan. 04, 2000
Filed:
Dec. 22, 1997
Kenji Katori, Kanagawa, JP;
Nicolas Nagel, Kanagawa, JP;
Koji Watanabe, Kanagawa, JP;
Masahiro Tanaka, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An electronic material is expressed by the composition formula M.sub.Ia M.sub.IIb O.sub.c (where a, b and c are compositions in atomic %, M.sub.I is at least one sort of noble metal selected from the group consisting of Pt, Ir, Ru, Rh and Pd, and M.sub.II is at least one sort of transition metal selected from the group consisting of Hf, Ta, Zr, Nb, V, Mo and W) having a composition within the range of 90.gtoreq.a.gtoreq.40, 15.gtoreq.b.gtoreq.2, 4.ltoreq.c and a+b+c=100. A dielectric capacitor comprises: a diffusion preventing layer made of the material expressed by the composition formula M.sub.ia M.sub.IIb O.sub.c ; a lower electrode on the diffusion preventing layer; a dielectric film on the lower electrode; and an upper electrode on the dielectric film. Another dielectric capacitor comprises: a diffusion preventing layer made of a material expressed by the composition formula M.sub.Ia M.sub.IIb O.sub.c (where a, b and c are compositions in atomic %, M.sub.II is at least one sort of noble metal selected from the group consisting of Pt, Ir, Ru, Rh and Pd, and M.sub.II is at least one sort of rare earth element) having a composition within the range of 90.gtoreq.a.gtoreq.40, 15.gtoreq.b.gtoreq.2, 4.ltoreq.c and a+b+c=100; a lower electrode on the diffusion preventing layer; a dielectric film on the lower electrode; and an upper electrode on the dielectric film.