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:
Feb. 28, 2012
Filed:
Jun. 30, 2009
Jung Woo Park, Seoul, KR;
Sung Yoon Cho, Suwon-si, KR;
Jung Woo Park, Seoul, KR;
Sung Yoon Cho, Suwon-si, KR;
Hynix Semiconductor Inc., Icheon-si, KR;
Abstract
A method for fabricating a flash memory device includes forming a control gate having a hollow donut shape over an insulation layer formed over a substrate. The method also includes forming an inter-poly dielectric of a spacer shape on an inner wall of the control gate, filling a conductive layer for a floating gate between the spacer shaped inter-poly dielectrics, and forming an interlayer insulation layer over a resulting product formed with the conductive layer for a floating gate. The method further includes removing a center portion of the conductive layer for a floating gate to form an opening, forming a tunnel insulation layer on an inner face of the opening, and filling with a semiconductor layer the opening formed with the tunnel insulation layer to form an active region.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile