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:
Feb. 24, 2004
Filed:
Oct. 11, 2002
Christoph Deml, Munich, DE;
Massimo Atti, Munich, DE;
Infineon Technologies AG, Munich, DE;
Abstract
A semiconductor memory device includes a semiconductor substrate having a first conductivity type and multiple parallel trenches extending in a first direction in the substrate. Each trench is filled with an isolation material and has an adjacent trench separated therefrom by a strip region. The device also includes multiple gate structures, for storing charge in a nonvolatile manner, arranged above the surface of the substrate and electrically isolated therefrom. The gate structures are arranged in parallel strips extending in a second direction that cross the strip regions. The device further includes multiple word lines, each of which is arranged on a corresponding gate structure from the multiple gate structures. The device also includes multiple active regions of a second conductivity type, each of which is arranged at one end of a corresponding strip region and each of which is electrically connectable to the gate structures of the corresponding strip region.