Epitaxial growth

Which research-stage technique grows a crystal on a substrate covered with a 2D material such as graphene so that the grown film can be peeled off and the substrate reused?

  1. ARemote epitaxy
  2. BThermal diffusion
  3. CAnodic bonding
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Answer: A. Remote epitaxy

In remote epitaxy, the substrate is covered with a few atomic layers of graphene or similar, and the crystal is grown on top. The substrate's crystal information passes through the graphene, giving a single crystal, while the film and substrate do not bond strongly, so the grown film is expected to be removable and the substrate reusable.

  • A. Correct. Growth through a 2D material allows the film to be peeled off.
  • B. Thermal diffusion is a process that spreads dopants by heat.
  • C. Anodic bonding joins silicon and glass with voltage and heat.
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More Epitaxial growth questions

  1. In epitaxial structures for GaN HEMTs, what is the main purpose of adding carbon or iron to the GaN buffer layer beneath the channel?
  2. When a polar compound semiconductor such as GaAs is grown on a non-polar silicon substrate, what is the boundary called between regions in which the Ga and As positions are inverted?
  3. In SiC epitaxy, what is the phenomenon called in which many atomic surface steps gather into large steps, roughening the surface?
  4. Which correctly describes epitaxial growth?
  5. Which is an example of heteroepitaxial growth?