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Proceedings Paper

Rapid thermal annealing effects on radio-frequency magnetron-sputtered P-type GaN thin films and Al/P-type GaN Schottky diodes
Author(s): Ching-Wu Wang; BoShao Soong; Jing-Yu Chen; ChungTung Tzeng; ChihLiang Chen
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Paper Abstract

In this article, we report the effects of RTA on Mg-diffused GaN thin films and Al/Mg-diffused GaN Schottky diodes. After Mg-diffusion process, the samples were exposed to RTA treatment the temperature from 800 to 900 degree(s)C. The samples were studied by variable temperature Hall effect measurements, and PL spectroscopy. The reduced resistivity by higher RTA temperature is due to the increased activated acceptor. Evidence, showed that both near-band-edge emission and deep level luminescent in PL spectrum could be all enhanced by raising the RTA temperature. Considering the Al/Mg-diffused Schottky diodes, the higher RTA temperature resulting in the superior forward conduction characteristics are suggested to be due to the more concentrations of hole and lower resisivity of GaN thin film. However, the greater reverse leakage current and lower breakdown voltage were deduced to be the creation formation of Ga-Al compounds at the metal-semiconductor interface.

Paper Details

Date Published: 11 July 2000
PDF: 8 pages
Proc. SPIE 4078, Optoelectronic Materials and Devices II, (11 July 2000);
Show Author Affiliations
Ching-Wu Wang, I-Shou Univ. (Taiwan)
BoShao Soong, I-Shou Univ. (Taiwan)
Jing-Yu Chen, I-Shou Univ. (Taiwan)
ChungTung Tzeng, I-Shou Univ. (Taiwan)
ChihLiang Chen, I-Shou Univ. (Taiwan)

Published in SPIE Proceedings Vol. 4078:
Optoelectronic Materials and Devices II
Yan-Kuin Su; Pallab Bhattacharya, Editor(s)

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