Compound semiconductors

How is silicon germanium (SiGe) classified?

  1. AA III-V compound semiconductor
  2. BAn alloy semiconductor of two group IV elements
  3. CA II-VI compound semiconductor
Show answer and explanation

Answer: B. An alloy semiconductor of two group IV elements

SiGe is an alloy semiconductor mixing silicon and germanium, both group IV elements, in any ratio. It is compatible with silicon processes and is used for heterojunction bipolar transistors (HBTs), channel strain engineering and pMOS channel materials.

  • A. III-V compounds consist of group III and group V elements.
  • B. Correct. It is an alloy of group IV elements.
  • C. II-VI compounds consist of group II and group VI elements.
Practice this topic Back to topic

More Compound semiconductors questions

  1. What is a high-frequency IC called that integrates transistors together with passive components such as inductors and capacitors on a substrate such as GaAs?
  2. What is the empirical rule called that says the lattice constant of an alloy semiconductor such as AlGaAs varies almost linearly with composition?
  3. Which configuration combines a normally-on GaN HEMT in series with a low-voltage silicon MOSFET so it can be used safely with normally-off behavior?
  4. When a strong field is applied to GaAs, electrons transfer to another valley with lower mobility, and negative differential resistance appears in which current decreases as the field rises. Which oscillator device uses this?
  5. What is the problem called in which LED external quantum efficiency is high for blue (InGaN) and red (AlGaInP) but low in the green-to-yellow range between them?