What is SiC (silicon carbide)?

A wide-band-gap semiconductor with a band gap of about 3.3 eV. Its high breakdown field makes it suitable for high-voltage, low-loss power devices.

Field: Power semiconductors

SiC (silicon carbide) in the explanations

Questions that mention SiC (silicon carbide) (47)

  1. What is the main reason SiC (silicon carbide) is advantageous over Si for high-voltage power devices?
  2. What is the general term for semiconductors with a larger band gap than silicon, such as SiC and GaN?
  3. What is the main advantage of using SiC Schottky barrier diodes as freewheeling diodes in inverters and similar circuits?
  4. When SiC or GaN power devices switch at high speed, which problem particularly needs countermeasures?
  5. What is the main advantage of using SiC power devices in electric vehicle inverters?
  6. Which is a known challenge of SiC MOSFETs?
  7. In SiC power modules operating at high temperatures, which material is sometimes used instead of solder to bond the chips?
  8. Which is a known cause of degradation when current flows continuously through the body diode of a SiC MOSFET?
  9. Why is a negative gate voltage (for example, −3 to −5 V) sometimes applied to SiC MOSFETs or IGBTs in the off state?
  10. What is one main reason SiC is used as the substrate for GaN HEMTs?
  11. Which is one reason SiC wafers are difficult and expensive to manufacture?
  12. Why are epitaxial layers important in the fabrication of SiC power devices?
  13. In SiC epitaxial growth, what is the main reason for using substrates tilted a few degrees from the crystal axis (with an off-angle)?
  14. Which polytype is mainly used for SiC power devices?
  15. Which is closest to the typical growth temperature for SiC epitaxy (CVD)?

Related terms

GaN (gallium nitride) On-resistance GaAs (gallium arsenide) Ga2O3 (gallium oxide) Mobility InP (indium phosphide) Schottky barrier diode Yield Epitaxial growth 4H-SiC

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