Methods of forming semiconductor devices

Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having insulated gate

Reexamination Certificate

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Details

C438S201000, C438S257000, C438S591000, C257SE21179, C257SE21422, C257SE21679

Reexamination Certificate

active

08039345

ABSTRACT:
A method of forming a semiconductor device may include forming a first pattern on a substrate, and forming a first dielectric layer on the first pattern. The first pattern may be between portions of the first dielectric layer and the substrate. A second dielectric layer may be formed on the first dielectric layer, and the first dielectric layer may be between the first pattern and the second dielectric layer. A second pattern may be formed on the second dielectric layer. Portions of the second dielectric layer may be exposed by the second pattern, and the first and second dielectric layers may be between portions of the first and second patterns. The exposed portions of the second dielectric layer may be isotropically etched.

REFERENCES:
patent: 7122415 (2006-10-01), Jang et al.
patent: 2005/0287812 (2005-12-01), Wang et al.
patent: 2008/0085584 (2008-04-01), Noh et al.
patent: 1020050070708 (2005-07-01), None
patent: 1020080040214 (2008-05-01), None

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