Controlling CoSi2 formation temperature by reactive deposition - Ali Ahmed, Hind
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When cobalt is evaporated under ultra high vacuum conditions conditions onto a heated silicon substrate, the cobalt reacts with the silicon and cobalt silicides are formed directly - a process which is referred to as reactive deposition. If the substrate temperature is maintained above 550°C a CoSi2 film is produced, while at substrate temperatures below 500°C the film is in the form of CoSi. At intermediate temperatures a mixed mono/di-silicide film is produced. A combination of real-time RBS and real-time XRD has been used to study the effect of the temperature of reactive deposition used to…mehr

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Produktbeschreibung
When cobalt is evaporated under ultra high vacuum conditions conditions onto a heated silicon substrate, the cobalt reacts with the silicon and cobalt silicides are formed directly - a process which is referred to as reactive deposition. If the substrate temperature is maintained above 550°C a CoSi2 film is produced, while at substrate temperatures below 500°C the film is in the form of CoSi. At intermediate temperatures a mixed mono/di-silicide film is produced. A combination of real-time RBS and real-time XRD has been used to study the effect of the temperature of reactive deposition used to produce CoSi on the subsequent formation temperature of CoSi2. Real-time XRD proved to be a very convenient method for determining the temperature of onset of CoSi2 formation, while real-time RBS is able to provide detailed information about the rate of disilicide formation. The results of the investigation show that the temperature at which the reactive deposition was carried out had a significant effect on the formation temperature of CoSi2: the lower the reactive deposition temperature used to form the CoSi film, the higher the subsequent formation temperature of CoSi2.
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Autorenporträt
Borne in Sudan Oct 1982. B.Sc.in Mathematics and Physics (1999¿2004) Uni. of Khartoum, Sudan. PGD in Mathematical Sciences (2005¿2006) Uni. of Stellenbosch/African Institute for Mathematical Science, South Africa. M.Sc. in Physics (2006¿2008), Uni. of Cape Town, South Africa , Professional Master in NEMS/MEMS (2008-2009), Uni. of Trento, Italy.