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:
Sep. 18, 2001
Filed:
Aug. 11, 1999
Richard J. Huang, Cupertino, CA (US);
Lewis Shen, Cupertino, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
An oxide buffer layer is formed between an underlying silicon layer and overlying ARC to prevent damage to the silicon layer when removing the ARC. Embodiments include depositing a silicon oxide buffer layer on an amorphous or polycrystalline silicon layer by PCVD, LPCVD or high temperature CVD, forming a SiON or Si-rich SiN ARC on the silicon oxide buffer layer, forming a photoresist mask on the ARC, patterning the underlying silicon layer to form a conductive line or gate electrode, stripping the photoresist mask and then stripping the ARC with hot phosphoric acid while the silicon oxide buffer layer protects the underlying silicon feature from pitting.