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:
Aug. 01, 2000
Filed:
May. 16, 1998
Farrokh Omid-Zohoor, Sunnyvale, CA (US);
Advanced Micro Devices, Sunnyvale, CA (US);
Abstract
An integrated circuit device includes a substrate having a planar surface and isolating trenches etched from the substrate. The isolating trenches form edges and corners with the surface of the substrate. An oxide covers the surface and fills the isolating trenches. The oxide has a thickness at the edges and corners which is greater than its thickness in other areas of the surface of the substrate. Field effect transistors having gate electrodes disposed on the oxide over the edges and corners and over a portion of the other areas of the surface are formed. Formation of parasitic edge transistors is suppressed and thinning of the oxide at the trench edges and corners is prevented because the oxide at the edges and corners is raised with respect to the other areas of the surface, thereby elevating the gate electrode at the edge and corner.