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. 07, 2009
Filed:
Dec. 06, 2005
Applicant:
IN NO Lee, Icheon-si, KR;
Inventor:
In No Lee, Icheon-si, KR;
Assignee:
Hynix Semiconductor Inc., Gyeonggi-do, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 21/76 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed herein is a method of manufacturing semiconductor devices. After first isolation trenches are formed in a cell region, second isolation trenches are formed in a peripheral region by an etch process using a photoresist as a mask. As such, top corner portions of an active substrate of the peripheral region are rounded. It is thus possible to fundamentally prevent a hump phenomenon incurred by thinning of the gate oxide film.