Get up in the morning, switch on the light, turn on the television. Then, make coffee and prepare breakfast.

For this sequence of actions to be performed, electricity, which is an essential component of each of them, must be delivered to each household in a stable manner.

From several thousand to 20,000 volts of electricity are generated at power plants and delivered to factories, buildings, railroads, households and others after undergoing power conversion at substations. The power conversion process, however, which uses power semiconductors to make the electricity easily useable, results in a loss of electricity. For this reason, not all the electricity generated at a given power plant ends up being used.


It is expected that the expanded use of silicon carbide (SiC) power semiconductors, which contain epitaxial wafers, will help reduce the aforementioned power loss. SiC power semiconductors allow more efficient power conversion than the silicon (Si) semiconductors now in use and can help achieve substantial energy conservation.

SiC power semiconductors also represent one of the main components of invertors that are used to control the revolution of train and automobile motors. Compared with Si products, SiC epitaxial wafers have superior features and can make more contributions in terms of reducing the weight and size of the components.

Showa Denko is developing SiC epitaxial wafers, on which the performance of SiC power semiconductors depends. We are committed to improving the quality of the wafers, with the ultimate aim of seeking to contribute to the expanded use of SiC power semiconductors in various fields.