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Study of the Thermal Stability of the Schottky Contacts on GaInP Grown by LP-MOCVD

Published online by Cambridge University Press:  22 February 2011

Edward Y. Chang ,
Yeong-Lin Lai ,
Kuen-Chyuan Lin ,
Chun-Yen Chang  and
F. Y. Juang
Edward Y. Chang
Affiliation:
National Chiao Tung University, Institute of Material Science and Engineering, Hsinchu, Taiwan, Republic of China
Yeong-Lin Lai
Affiliation:
National Chiao Tung University, Institute of Electronics, Hsinchu, Taiwan, Republic of China
Kuen-Chyuan Lin
Affiliation:
National Chiao Tung University, Institute of Electronics, Hsinchu, Taiwan, Republic of China
Chun-Yen Chang
Affiliation:
National Chiao Tung University, Institute of Electronics, Hsinchu, Taiwan, Republic of China
F. Y. Juang
Affiliation:
Chung Shan Institute of Science and Technology, Lungtan, Taiwan, Republic of China
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Abstract

Thermal stability of the Schottky contacts on Ga0.51In0.49P has been made. The Ga0.51In0.49P epitaxial layer was successfully grown on the GaAs substrate by LP-MOCVD to form a lattice-matched heterostructure. In this paper, materials aspects of the Ga0.51In0.49P layers were characterized and thermal stability of three different types of films, including single-layer metal (Pt, Ni, Pd, Au, Co, Mo, W, Cr, Ti, Al, Ta, and In), metal silicides (WSi2, W5Si3, PtSi, and Pt2i), and TiW nitrides (TiWNx ) as the Schottky contacts materials on Ga0.51In0.49P were studied. Due to the high bandgap nature of Ga0.51In0.49P, the Schottky contacts on Ga0.51In0.49P demonstrate good characteristics. The barrier heights range from 0.79 to 1.19 eV depending on the selection of the materials and the annealing conditions. For single-metal contacts, Pt film shows the best thermal stability, the barrier height of 1.09 eV and the ideality factor of 1.06 were obtained for the Pt Schottky diode with furnace annealing at 500 °C for 30 min. For refractory compound films, the TiWNx film shows the best thermal stability. The TiWNx Schottky contacts demonstrate excellent electrical as well as physical characteristics, even after high temperature annealing at 850°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 282: Symposium E – Chemical Perspectives of Microelectronic Materials III , 1992 , 253
Copyright
Copyright © Materials Research Society 1993

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References

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