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:
Mar. 20, 2001
Filed:
Aug. 29, 1997
Mark I. Gardner, Cedar Creek, TX (US);
Mark C. Gilmer, Austin, TX (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A semiconductor device having a reduced polysilicon gate electrode width and a process for manufacturing such a device is provided. Consistent with the present invention a semiconductor device is formed by forming an insulating film selective to oxide etchant over a substrate. At least one polysilicon block is formed over the insulating film. The polysilicon block is oxidized to grow an oxide layer on exposed surfaces of the polysilicon block and thereby reduce the width of the polysilicon block. The oxide layer is then removed to form a gate electrode with the remaining portion of the polysilicon block. In this manner, gate electrodes having widths smaller than the resolution of current etching techniques can be formed. In accordance with one aspect of the invention, the polysilicon gate electrode has a width less than about 0.15 microns. In accordance with another aspect, the insulating layer selective to oxide etchant is formed from a high permittivity material, such as a barium strontium titanate oxide.