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. 04, 2003
Filed:
Dec. 28, 2001
Seung Ho Chang, Choongcheongbuk-Do, KR;
Hynix Semiconductor, Inc., Kyoungki-Do, KR;
Abstract
In a multi-level flash memory including a plurality of flash memory cells having 2 levels represented by upper n bits and lower m bits, a device for programming or reading the flash memory, comprising: an upper bit reference cell block for supplying reference cell currents to construct n upper bits in (n+m) bits for representing multi-levels of a selected memory cell, a lower bit reference cell block supplying reference currents for constructing m lower bits in the (n+m) bits for representing multi-levels of the selected memory cel, and a memory cell program/read unit for reading or programming levels of the selected memory cell by comparing a first voltage of the selected memory cell to the reference currents.