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. 01, 2002
Filed:
Feb. 28, 2001
Byung Gook Park, Seoul, KR;
Dae Hwan Kim, Seoul, KR;
Hyundai Electronics Industries Co., Ltd., Kyoungki-Do, KR;
Abstract
A fabrication method provides a single electron transistor with a reduced quantum dot size. The method includes the steps of forming a first gate insulating film on a semiconductor substrate, implanting impurity ions into source/drain regions of the semiconductor substrate to form source/drain impurity regions, forming a lower gate on the first gate insulating film over a channel region between the source/drain impurity regions, forming a second gate insulating film on the lower gate and the first gate insulating film, forming a third insulating film on the second gate insulating film, selectively removing a portion of the third insulating film over the channel region in a direction perpendicular to a direction between the source/drain impurity regions to define a groove in the third insulating film, and forming an upper gate in he groove of the third insulating film.