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In situ laser recrystallization of Si layers during low-pressure chemical vapor deposition: Recrystallization dynamics and influence of the seed layer

Published online by Cambridge University Press:  31 January 2011

D. Della Sala ,
A. Santoni ,
L. Fornarini ,
J. Lancok ,
S. Loreti ,
I. Menicucci  and
C. Minarini
D. Della Sala
Affiliation:
ENEA–Casaccia, Via Anguillarese 301, 00060 S. Maria di Galeria, Italy
A. Santoni
Affiliation:
ENEA–Frascati, Via E. Fermi 45, 00040 Frascati, Italy Lab. TASC-INFM, Area Science Park, Basovizza S.S. 14, Km. 163, 5, I-34012 Trieste, Italy
L. Fornarini
Affiliation:
ENEA–Frascati, Via E. Fermi 45, 00040 Frascati, Italy
J. Lancok
Affiliation:
Academy of Science, Institute of Physics, Na Slovance 2, 182 21 Prague 8, Czech Republic
S. Loreti
Affiliation:
ENEA–Frascati, Via E. Fermi 45, 00040 Frascati, Italy
I. Menicucci
Affiliation:
ENEA–Frascati, Via E. Fermi 45, 00040 Frascati, Italy
C. Minarini
Affiliation:
ENEA–Portici, Localita‘Granatello, 80055 Portici, Italy
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Abstract

The growth of polycrystalline silicon on glass by low-pressure chemical vapor deposition and in situ laser induced recrystallization was investigated with the aim to study the influence of the seed layer and the mechanism of the recrystallization dynamics on the structural and morphological properties of the grown film. A seed layer was used to trigger the solidification process of many additional in situ laser-crystallized overlayers. One-dimensional calculations of the thermal flow produced by laser irradiation were used to clarify the complex interaction between the substrate and the molten silicon surface layer during nucleation and growth. The experiments show the relevant role played by the seed layer and the peculiar shaping of the film surface due to the preferential aggregation of molten silicon. Compact polysilicon films with thicknesses up to 4 μm with almost monocrystalline grains of 1–2-μm size were obtained.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 11 , November 2002 , pp. 2966 - 2973
Copyright
Copyright © Materials Research Society 2002

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References

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