Epitaxial growth
Which correctly describes epitaxial growth?
- AGrowing a single-crystal thin film on a single-crystal substrate with the same crystal orientation as the substrate
- BDepositing an amorphous film on a substrate
- CMelting the substrate at high temperature and recrystallizing it
Show answer and explanation
Answer: A. Growing a single-crystal thin film on a single-crystal substrate with the same crystal orientation as the substrate
In epitaxial growth, atoms stack up following the crystal arrangement of the substrate, forming a single-crystal film with the same orientation. Because layers with doping different from the substrate can be made precisely, it is used for high-resistivity layers of power devices and substrates for CMOS image sensors.