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Semiconductor device and method for manufacturing the same

Image Number 3 for United States Patent #7148158.

A semiconductor device includes a semiconductor device comprising a semiconductor substrate, source/drain regions formed in the semiconductor substrate, a gate insulation film formed on the semiconductor substrate, a gate electrode formed on the gate insulation film between the source/drain regions, and a gate sidewall spacer formed on side surfaces of the gate electrode, wherein the gate sidewall spacer is composed of silicon oxide containing 0.1 30 atomic % of chlorine.

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