Inverted Pyramid Defects in 4H-SiC Epilayers

Amitesh Shrivastava; Peter G. Muzykov; Tangali S. Sudarshan

doi:10.4028/www.scientific.net/MSF.615-617.125

Paper Titles

The Effect of 4H-SiC Substrate Surface Scratches on Chemical Vapor Deposition Grown Homo-Epitaxial Layer Quality
p.109

Control of the Surface Morphology on Low Off Angled 4H-SiC Homoepitaxal Growth
p.113

Extended Study of the Step-Bunching Mechanism during the Homoepitaxial Growth of SiC
p.117

Dislocations and Triangular Defect in Low-Temperature Halo-Carbon Epitaxial Growth and Selective Epitaxial Growth
p.121

Inverted Pyramid Defects in 4H-SiC Epilayers
p.125

PL Imaging Study of In-Grown Stacking Faults in 4H-SiC Epitaxial Layer
p.129

On-Axis Homoepitaxy on Full 2” 4H-SiC Wafer for High Power Applications
p.133

Liquid Phase Epitaxy of 4H-SiC Layers on On-Axis PVT Grown Substrates
p.137

LPE Growth of Low Doped n-Type 4H-SiC Layer on On-Axis Substrate for Power Device Application
p.141

HomeMaterials Science ForumMaterials Science Forum Vols. 615-617Inverted Pyramid Defects in 4H-SiC Epilayers

Inverted Pyramid Defects in 4H-SiC Epilayers

Abstract:

In this work we identified the nucleation sites of inverted pyramid defects in 4H-SiC epilayers using AFM and KOH etching and proposed a mechanism for its formation. Partial dislocations, bounding the stacking faults, mostly aligned along the <11-20> directions, were found at the base of the inverted pyramid defects. It is shown that the basal plane dislocations, serve as nucleation centers for stacking faults, and eventually the formation of inverted pyramid defects. A geometrical model is formulated to explain the formation mechanism of inverted pyramid defects.