GaN-based multi-two-dimensional-electron-gas-channel diodes on sapphire substrates with breakdown voltage of over 3 kV

Autor:	Akihisa Terano, Tohru Nakamura, Shigehisa Tanaka, Tomonobu Tsuchiya, Kazuhiro Mochizuki
Rok vydání:	2015
Předmět:	Materials science Physics and Astronomy (miscellaneous) business.industry General Engineering General Physics and Astronomy Schottky diode Cathode law.invention Anode law Electrode Sapphire Optoelectronics Breakdown voltage business Ohmic contact Diode
Zdroj:	Japanese Journal of Applied Physics. 54:066503
ISSN:	1347-4065 0021-4922
DOI:	10.7567/jjap.54.066503
Popis:	We investigated the achievability of low specific on-resistance and high breakdown voltage by GaN diodes consisting of three, five, and eight two-dimensional-electron-gas (2DEG) channels. The anode Schottky electrode and cathode Ohmic electrode were formed on each side wall of the multi-2DEG-channel and the n-type region was formed by Si-ion implantation in the cathode electrode-formation area of each multi-2DEG-channel. With increasing number of 2DEG channels of the diodes, specific on-resistance (RonA) showed a tendency to decrease; RonA of eight-2DEG-channel diodes was as low as 12.1 mΩ cm2. The breakdown voltage of all the fabricated diodes exceeded 3 kV. Although the electrical characteristics of the multi-2DEG-channel diodes fabricated on sapphire substrates were demonstrated, the number of cracks appearing on the epitaxial layer surface was found to increase with increasing number of 2DEG channels. Such crack formation was concluded to govern the practical limit for the number of 2DEG channels.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::99197a84726fd0264656243d5de1adfc https://doi.org/10.7567/jjap.54.066503 Zobrazit plný text záznamu