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:
Jan. 29, 2002
Filed:
May. 27, 1999
Kiyoyuki Morita, Kyoto, JP;
Kiyoshi Morimoto, Osaka, JP;
Kiyoshi Araki, Osaka, JP;
Koichiro Yuki, Osaka, JP;
Kazuyasu Adachi, Osaka, JP;
Masayuki Endo, Osaka, JP;
Ichiro Yamashita, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A semiconductor device as a nonvolatile memory comprises dot elements which are formed out of the semiconductor or conductor fine particles and function as a floating gate. The dot elements are asymmetrically formed to a control gate and may be formed in a sidewall insulating film formed over the side face of the control gate or a select gate. When inclined or stepped portions having level differences are formed in a semiconductor substrate, the dot elements are formed on a specified portion of the inclined or stepped portions.