Delta Doping in Si and SiGe by LP(RT)CVD

Tillack, Bernd; Schlote, J.; Ritter, G.; Krüger, D.; Morgenstern, G.; Gaworzewski, P.

doi:10.1051/jphyscol:19955132

Cited by 2 publications

(1 citation statement)

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“…It has been shown 11,54,72) that the B atomic layer process is not self-limited at temperatures of 350 C and higher. B atomic amount incorporated into the SiGe epitaxial films (B dose) increases with increasing B 2 H 6 partial pressure without saturation, and the B dose of several monolayers was obtained.…”

Section: Boron Atomic Layer Doping In Sige Epitaxial Growthmentioning

confidence: 99%

Atomically Controlled Processing for Group IV Semiconductors by Chemical Vapor Deposition

Murota

Sakuraba

Tillack

2006

jjap

112

153

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One of the main requirements for Si-based ultrasmall devices is atomic-order control of process technology. Here we show the concept of atomically controlled processing for group IV semiconductors based on atomic-order surface reaction control. By ultraclean low-pressure chemical vapor deposition using SiH 4 and GeH 4 gases, high-quality low-temperature epitaxial growth of Si, Ge, and Si 1Àx Ge x with atomically flat surfaces and interfaces on Si (100) is achieved, and atomic-order surface reaction processes on group IV semiconductor surface are formulated based on a Langmuir-type surface adsorption and reaction scheme. In in-situ doped Si 1Àx Ge x epitaxial growth on the (100) surface in a SiH 4 -GeH 4 -dopant (PH 3 , or B 2 H 6 or SiH 3 CH 3 )-H 2 gas mixture, the deposition rate, the Ge fraction and the dopant concentration are explained quantitatively assuming that the reactant gas adsorption/reaction depends on the surface site material and that the dopant incorporation in the grown film is determined by Henry's law. Self-limiting formation of 1-3 atomic layers of group IV or related atoms in the thermal adsorption and reaction of hydride gases on Si(100) and Ge (100) is generalized based on the Langmuir-type model. Si or SiGe epitaxial growth over N, P or B layer already-formed on Si(100) or SiGe(100) surface is achieved. Furthermore, the capability of atomically controlled processing for advanced devices is demonstrated. These results open the way to atomically controlled technology for ultralarge-scale integrations.

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Section: Boron Atomic Layer Doping In Sige Epitaxial Growthmentioning

confidence: 99%