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Excimer Laser Induced Crystallization of AmorphousSilicon-Germanium Films
Published online by Cambridge University Press: 15 February 2011
Abstract
Application of excimer laser crystallization of Amorphous silicon (a-Si) hasintroduced a new, interesting potential technology for the fabrication ofpolycrystalline (poly-Si) thin film transistors. We are currently studyingpolycrystalline Si1−xGex thin films in order todetermine whether this material can lead to improved electrical propertiesor to better processing requirements when compared with polycrystalline Sifilms. In this work we analyze by RBS, TEM, Raman spectroscopy and surfacereflectance, the structure of thin Amorphous Si1−xGexfilms after irradiation with a XeCl excimer laser. The Amorphous SiGe filmswere prepared by evaporation of Si and Ge onto oxidized Si substrates usingan electron gun in vaccum. The effects of laser energy fluence duringirradiation are investigated. The Amorphous to crystalline transition isfollowed by in-situ measurement of time-resolved reflectivity.
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- Copyright © Materials Research Society 1994