Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having insulated gate
Reexamination Certificate
2007-08-21
2007-08-21
Nguyen, Tuan H. (Department: 2813)
Semiconductor device manufacturing: process
Making field effect device having pair of active regions...
Having insulated gate
C438S737000
Reexamination Certificate
active
11010986
ABSTRACT:
Disclosed herein is a method for forming a gate electrode of a non-volatile memory device. In an etch process of a gate electrode for defining the gate electrode, the etch process is performed by selectively adding an addition gas containing carbon. This prevents undercuts from being formed on a sidewall of a control gate when a floating gate is etched. It is thus possible to form the gate electrode having a vertical profile.
REFERENCES:
patent: 2005/0095783 (2005-05-01), Haselden et al.
patent: 1020000043917 (2000-07-01), None
Official Action in Corresponding KR Application No. 2004-0073679 dated Apr. 6, 2006.
Hynix / Semiconductor Inc.
Marshall & Gerstein & Borun LLP
Nguyen Tuan H.
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