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:
Jun. 25, 2013
Filed:
Oct. 07, 2011
Digh Hisamoto, Kokubunji, JP;
Kan Yasui, Kodaira, JP;
Tetsuya Ishimaru, Kokubunji, JP;
Shinichiro Kimura, Kunitachi, JP;
Daisuke Okada, Kunitachi, JP;
Digh Hisamoto, Kokubunji, JP;
Kan Yasui, Kodaira, JP;
Tetsuya Ishimaru, Kokubunji, JP;
Shinichiro Kimura, Kunitachi, JP;
Daisuke Okada, Kunitachi, JP;
Renesas Electronics Corporation, Kawasaki-shi, JP;
Abstract
An operation scheme for operating stably a semiconductor nonvolatile memory device is provided. When hot-hole injection is conducted in the semiconductor nonvolatile memory device of a split gate structure, the hot-hole injection is verified using a crossing point that does not change with time. Thus, an erased state can be verified without being aware of any time-varying changes. Also, programming or programming/erasure is conducted by repeating pulse voltage or multi-step voltage application to a gate section multiple times.