Paper Title:

Investigation of Additional States in the Silicon Carbide Surface after Diffusion Welding

Periodical Materials Science Forum (Volumes 717 - 720)
Main Theme Silicon Carbide and Related Materials 2011
Edited by Robert P. Devaty, Michael Dudley, T. Paul Chow and Philip G. Neudeck
Pages 275-278
DOI 10.4028/www.scientific.net/MSF.717-720.275
Citation János Mizsei et al., 2012, Materials Science Forum, 717-720, 275
Online since May, 2012
Authors János Mizsei, Oleg Korolkov, Natalja Sleptsuk, Jana Toompuu, Toomas Rang
Keywords Deep Level, Diffusion Welding, DLTS Measurements, Kelvin Probe, Surface States
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Abstract

This paper is a summary of the experimental study of deep levels in a SiC crystal lattice caused by diffusion welding (DW). Investigations were carried out by DLTS and Kelvin Probe methods. Investigations revealed that DLTS method is not applicable for identification of surface states. Research conducted by the Kelvin Probe method has shown an increase in the density of surface states after the diffusion welding from 2x1015 cm-2 to 3.5x1016 cm-2.