Co. The resulting higher threshold to avalanche breakdown makes SiC an attractive alternative to silicon substrates for high power applications. Because of the mismatch, SiC layers on Si substrates can warp. According to Sullivan, SiC substrates open the door to high power 15 kV devices for electric motors not currently addressed by solid state devices. What remains to be sorted out is the selection of the most effective SiC material phase, alpha or beta. Alpha material consists of 170 polyforms separated by thermal dynamic differences, and many are available in single crystal form.
Beta is the only cubic form of SiC, but is only available as a polycrystal.
Which will endure, only time will tell. Copyright 2000 Cahners Business Information , A Division of Reed Elsevier, Inc . Privacy Policy .