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. 18, 2003
Filed:
Feb. 16, 2001
Applicant:
Inventors:
Tomoko Ogura, Wappingers Falls, NY (US);
Masaharu Kirihara, Beacon, NY (US);
Assignee:
Halo, Inc., Wappingers Falls, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 1/606 ;
U.S. Cl.
CPC ...
G11C 1/606 ;
Abstract
A wordline decoder for high density flash memory is described with negative voltage capability for memory operations such as erase. A main decoder is shared with a plurality of wordline driver circuits to reduce wiring congestion and overall layout size. In a second embodiment, a wordline decoder for fast read access is provided in which a high speed positive voltage decoder is separate from the negative voltage decoder with the addition of a triple well NMOS transistor into the inverter driver circuits. The use of triple well NMOS transistors reduces circuit and layout complexity.