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. 02, 2012
Filed:
Aug. 05, 2010
Noboru Ooike, Kawasaki, JP;
Noboru Ooike, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
In one embodiment, a semiconductor memory device includes a semiconductor substrate, and isolation layers formed in a surface of the semiconductor substrate, and separating the semiconductor substrate into active areas, the isolation layers and the active areas being alternately arranged along a predetermined direction parallel to the surface of the semiconductor substrate, a height of upper surfaces of the isolation layers being lower than a height of an upper surface of the semiconductor substrate. The device further includes diffusion layers formed on surfaces of the active areas, and a stress liner formed on upper surfaces and side surfaces of the diffusion layers, and formed of a material having a lattice constant smaller than a lattice constant of a material formed of the semiconductor substrate.