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:
Mar. 25, 2014
Filed:
Aug. 07, 2013
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Hiroomi Nakajima, Yokkaichi, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor memory device, including: plural parallel first lines; plural second lines disposed to intersect the first lines; and a memory cell array including memory cells, disposed at intersections of the first lines and the second lines, each of the memory cells configured by a rectifier element and a variable resistor connected in series. The rectifier element includes: a first semiconductor region including an impurity of a first conductivity type at a first impurity concentration; and a second semiconductor region including an impurity of a second conductivity type at a second impurity concentration lower than the first impurity concentration and including an impurity of the first conductivity type at a third impurity concentration lower than the second impurity concentration, the first and second semiconductor regions being formed by silicon.