By scratching the (0001)Si surface of 6H-SiC followed by annealing, dislocations were introduced in
the crystal that were subsequently characterized by Transmission Electron Microscopy (TEM).
Schottky diodes were then manufactured from the dislocated crystal and their electrical properties
were studied by capacitance-voltage (C−V), current-voltage (I−V), and thermally-stimulated
capacitance (TSCap) measurements. It was found that the deformation introduces deep traps Maynly
located in the upper third of the bandgap promoting a significant increase in the series resistance of
the diodes. The as-introduced dislocations were predominantly 30°
partials and their core nature was
determined to be Si(g) by the technique of Large Angle Convergent Beam Electron Diffraction
(LACBED). The compensation effects observed after deformation are presumed to be caused not only
by Si(g) dislocations but also by the other defects generated during the deformation step.