Semiconductor structure with airgap

A field effect transistor (FET) with an underlying airgap and methods of manufacture are disclosed. The method includes forming an amorphous layer at a predetermined depth of a substrate. The method further includes forming an airgap in the substrate under the amorphous layer. The method further inc...

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Bibliographische Detailangaben
Hauptverfasser: Joseph, Alvin J, Stamper, Anthony K, Liu, Qizhi, Jaffe, Mark D
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A field effect transistor (FET) with an underlying airgap and methods of manufacture are disclosed. The method includes forming an amorphous layer at a predetermined depth of a substrate. The method further includes forming an airgap in the substrate under the amorphous layer. The method further includes forming a completely isolated transistor in an active region of the substrate, above the amorphous layer and the airgap.