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Dislocation processes during SiC bulk crystal growth
- Source :
- Microelectronic Engineering. 83:142-145
- Publication Year :
- 2006
- Publisher :
- Elsevier BV, 2006.
-
Abstract
- Dislocation processes during physical vapor transport (PVT) growth of silicon carbide (SiC) single crystals were investigated by defect selective etching. It was found that foreign polytype inclusions introduced a high density of dislocations at the polytype boundary. In the polytype-transformed areas of the crystal, very few medium size hexagonal etch pits due to threading screw dislocations were observed, indicating that the polytype transformation ceased the propagation of threading screw dislocations. The oval-shaped etch pit arrays observed on the etched vicinal (0001)Si surface, indicative of the dislocation multiplication in the basal plane, showed characteristic distribution around micropipes. Based on the results, we have argued the dislocation behavior in PVT grown SiC crystals, suggesting that dislocation interaction and conversion are relevant processes to understanding the behavior.
- Subjects :
- Dislocation creep
Materials science
Condensed matter physics
Crystal growth
Condensed Matter Physics
Atomic and Molecular Physics, and Optics
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Crystal
chemistry.chemical_compound
Crystallography
chemistry
Etching (microfabrication)
Silicon carbide
Threading (manufacturing)
Electrical and Electronic Engineering
Dislocation
Vicinal
Subjects
Details
- ISSN :
- 01679317
- Volume :
- 83
- Database :
- OpenAIRE
- Journal :
- Microelectronic Engineering
- Accession number :
- edsair.doi...........97e54825ad3dd59abb5b7f4441f36672