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:
Dec. 13, 2011
Filed:
Dec. 27, 2006
Ashot Melik-martirosian, Sunnyvale, CA (US);
Ashot Melik-Martirosian, Sunnyvale, CA (US);
Spansion LLC, Sunnyvale, CA (US);
Abstract
A dual-bit memory device is provided which includes trench isolation material disposed below a bit line that is shared by adjacent memory cells. The dual-bit memory device comprises a substrate, a first memory cell designed to store two bits of information, a second memory cell designed to store two bits of information, and an insulator region. The first memory cell is adjacent to the second memory cell. The first memory cell includes a first buried bit line and a second buried bit line. The first memory cell and the second memory cell share the second buried bit line. The insulator region is disposed in the substrate below the second buried bit line to prevent electrons from flowing between the first memory cell and the second memory cell.