Basal Plane Dislocations in 4H-SiC Epilayers with Different Dopings

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Abstract:

Morphologies of basal plane dislocations (BPDs) in 4H-SiC epilayers doped with nitrogen or aluminum are explained in detail. While BPDs in low N-doped or Al-doped epilayers show the morphology of gliding dislocations responding to stresses, BPDs in highly N-doped (≥1.0×1018 cm-3) epilayers appear different. Some of them are parallel to [11-20] while others are straight and tilt from [11-20]. Tilt BPDs were also studied by TEM. Factors that relate to such morphology are discussed.

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27-30

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July 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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