Wide-gap Material

“The wide gap semiconductors” are semiconductor materials with a wide "energygap", which brings high semiconductor properties, such as high breakdownfield, saturation velocity, and excellent thermal properties. Those characteristics contribute to the ability to operate at higher temperatures, and for some applications allow devices to switch faster and larger voltages. Silicon, which is the most popular semiconductor material, has an energy gap of 1.1 eV. On the other hand, representative wide gap semiconductors such as silicon carbide (SiC) and gallium nitride (GaN) have energy gaps of larger than 3.0 eV. The wide gap semiconductors are transparent crystals due to these large band gaps, and because of the difficulty for crystal synthesis it has been considered difficult to realize wide gap semiconductor devices. However, in the past decades, progress in the field of crystal growth of these materials has been made, which evoked a more aggressive research approach for wide gap semiconductor devices.

Main type of wide-gap semiconductors

1. SiC (Silicon Carbide)
2. GaN (Gallium Nitride)
3. AlN (Aluminium Nitride)
4. Diamond
5. ZnO (Zinc Oxide)
6. BN (Boron Nitride)

Today, Ceramicforum Co., Ltd. is dealing with SiC & GaN wafers and devices which are regarded as high reliable quality from the market.

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