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. 23, 2009
Filed:
Jan. 12, 2005
Mitsumasa Koyanagi, Natori-shi, Miyagi, JP;
Masaaki Takata, Miyagi, JP;
Mitsumasa Koyanagi, Natori-shi, Miyagi, JP;
Masaaki Takata, Miyagi, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Other;
Abstract
A nonvolatile semiconductor memory device which can shorten data writing and erasing time, significantly improve the endurance characteristic and be activated with low power consumption includes an insulating layer with electric insulation, wherein, a charge retention layer formed adjacent to a tunnel insulating film contains nano-particles comprised of a compound which is constituted from at least one single-element substance or chemical compound having a particle diameter of at most 5 nm functions as a floating gate, and which are independently dispersed with a density of from 10to 10particles per square centimeter.