Sheet resistance underneath the Au ohmic-electrode on hydrogen-terminated surface-conductive diamond (001)

The sheet resistance (R-sk) underneath ohmic Au-electrodes on hydrogen-terminated surface-conductive diamond (001) surfaces was examined by a special current-voltage measurement. It has been found that R-sk is about similar to 200 times larger than the sheet resistance, R-sh, in the open areas without Au-electrodes. The specific contact resistance, R-c, of ohmic Au-electrodes on H-terminated surface-conductive diamonds as determined by linear transmission line models must be corrected accordingly. As the results of this, R-c is suggested to be of the order of 1 x 10(-3)-1 X 10(-4) Omega CM2.