Abstract:
PROBLEM TO BE SOLVED: To provide a field effect transistor (FET) with a channel formed by a semiconductor nanowire (semiconductor nanowire channel) and doped semiconductor source and drain regions. SOLUTION: A FET structure with a semiconductor nanowire forming the FET channel and doped source and drain regions formed by radial epitaxy from the semiconductor nanowire body is disclosed. A top gated and a bottom gated nanowire FET structures are discussed. The source and drain fabrication can use either selective or non-selective epitaxy. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
A method for aligning a first set of features of a fabrication level of an integrated circuit chip to an electron beam alignment target including a high atomic weight layer formed in a substrate and forming the first set of features using electron beam lithography and for aligning a second set of features of the same fabrication level of the integrated circuit chip to an optical alignment target formed in the substrate and forming the second set of features using photolithography, the optical alignment target itself is aligned to the electron beam alignment target. Also a method of forming and a structure of the electron beam alignment target.
Abstract:
Techniques for embedding silicon germanium (e-SiGe) source and drain stressors in nanoscale channel-based field effect transistors (FETs) are provided. In one aspect, a method of fabricating a FET includes the following steps. A doped substrate having a dielectric thereon is provided. At least one silicon (Si) nanowire is placed on the dielectric. One or more portions of the nanowire are masked off leaving other portions of the nanowire exposed. Epitaxial germanium (Ge) is grown on the exposed portions of the nanowire. The epitaxial Ge is interdiffused with Si in the nanowire to form SiGe regions embedded in the nanowire that introduce compressive strain in the nanowire. The doped substrate serves as a gate of the FET, the masked off portions of the nanowire serve as channels of the FET and the embedded SiGe regions serve as source and drain regions of the FET.
Abstract:
Techniques for embedding silicon germanium (e-SiGe) source and drain stressors in nanoscale channel-based field effect transistors (FETs) are provided. In one aspect, a method of fabricating a FET includes the following steps. A doped substrate having a dielectric thereon is provided. At least one silicon (Si) nanowire is placed on the dielectric. One or more portions of the nanowire are masked off leaving other portions of the nanowire exposed. Epitaxial germanium (Ge) is grown on the exposed portions of the nanowire. The epitaxial Ge is interdiffused with Si in the nanowire to form SiGe regions embedded in the nanowire that introduce compressive strain in the nanowire. The doped substrate serves as a gate of the FET, the masked off portions of the nanowire serve as channels of the FET and the embedded SiGe regions serve as source and drain regions of the FET.
Abstract:
Es werden Techniken zur Einbettung von Silicium-Germanium(e-SiGe)-Source- und Drain-Stressoren in nanoskaligen kanalbasierten Feldeffekttransistoren (FETs) bereitgestellt. Nach einem Aspekt der Erfindung beinhaltet ein Verfahren zum Herstellen eines FET die folgenden Schritte. Ein dotiertes Substrat mit einem darauf befindlichen Dielektrikum wird bereitgestellt. Mindestens ein Silicium-(Si-)Nanodraht wird auf dem Dielektrikum platziert. Ein oder mehrere Teile des Nanodrahtes werden mit einer Maske abgedeckt, wobei andere Teile des Nanodrahtes freiliegend bleiben. Epitaktisches Germanium (Ge) wird auf den freiliegenden Teilen des Nanodrahtes aufgewachsen. Das epitaktische Germanium wird in das Si im Nanodraht eindiffundiert, um die im Nanodraht eingebetteten SiGe-Zonen auszubilden, die die Druckspannung in den Nanodraht einbringen. Das dotierte Substrat dient als Gate des FET, die durch Maske abgedeckten Teile des Nanodrahtes dienen als Kanäle des FET, und die eingebetteten SiGe-Zonen dienen als Source- und Drain-Zonen des FET.