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. 11, 2008
Filed:
Jan. 11, 2006
Isamu Asano, Tokyo, JP;
Tsuyoshi Kawagoe, Tokyo, JP;
Yukio Fuji, Tokyo, JP;
Kiyoshi Nakai, Tokyo, JP;
Kazuhiko Kajigaya, Tokyo, JP;
Isamu Asano, Tokyo, JP;
Tsuyoshi Kawagoe, Tokyo, JP;
Yukio Fuji, Tokyo, JP;
Kiyoshi Nakai, Tokyo, JP;
Kazuhiko Kajigaya, Tokyo, JP;
Elpida Memory, Inc., Tokyo, JP;
Abstract
A phase-change memory device includes a plurality of bit lines extending in a row direction, a plurality of selection lines extending in a column direction, and an array of memory cells each disposed at one of intersections between the bit lines and selection lines. Each memory cell includes a chalcogenide element and a diode connected in series, and an n-type contact layer underlying the n-type layer of the diode. Adjacent two of memory cells share a common bit-line contact plug connecting the n-type contact layers and the bit line.