SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING THE SAME

A semiconductor device comprising a silicon substrate, a gate structure and a heteroatom-containing epitaxial structure is provided. The gate structure is disposed on a surface of the silicon substrate. The heteroatom-containing epitaxial structure is disposed adjacent to the gate structure and has...

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Bibliographische Detailangaben
Hauptverfasser: HUANG SHINUAN, WANG IANG, HWANG GUANG-YAW, HUNG YU-HSIANG, WANG HSIANG-YING
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A semiconductor device comprising a silicon substrate, a gate structure and a heteroatom-containing epitaxial structure is provided. The gate structure is disposed on a surface of the silicon substrate. The heteroatom-containing epitaxial structure is disposed adjacent to the gate structure and has a major portion and an extension portion, wherein the major portion virtual vertically extends downwards into the silicon substrate from the surface; and the extension portion further extends downwards into the silicon substrate with a tapered cross-section continuing with the major portion.