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:
Apr. 15, 2008
Filed:
Dec. 21, 2005
Applicant:
Keun Woo Lee, Yongin-Si, KR;
Inventor:
Keun Woo Lee, Yongin-Si, KR;
Assignee:
Hynix Semiconductor Inc., Kyoungki-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/76 (2006.01); H01L 21/336 (2006.01);
U.S. Cl.
CPC ...
Abstract
A floating gate of a flash memory device is formed in a moat formed in an isolation film. Therefore, an electric field applied between a control gate and a channel region upon cycling can be precluded or mitigated. A distance between the control gate and the channel region is set greater than a predetermined value. Therefore, an electric field applied between the control gate and the channel region upon cycling can be mitigated. As a result, a data retention characteristic and an endurance characteristic can be improved.