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:
Nov. 26, 2002
Filed:
Feb. 28, 2001
Applicant:
Inventors:
Fuh-Cheng Jong, Tainan, TW;
Kent Kuohua Chang, Taipei, TW;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 1/604 ;
U.S. Cl.
CPC ...
G11C 1/604 ;
Abstract
A method of reading two-bit information in Nitride Read only memory (NROM) cell simultaneously. According to outputted voltage in drain or source of the NROM, it can identify a logical two-bit combination massage of the NROM. The method includes: grounding the source of the NROM; inputting a voltage to the drain of the NROM; inputting a voltage to the gate of the NROM; measuring the outputted current of drain or source; and dividing the outputted current into four different zones, and each zone represents a specific logical two-bit information, which is “0 and 0”, “0 and 1”, “1 and 0”, or “1 and 1”.