A composite susceptor for a radio frequency (RF) heated crystal growing furnace has a plurality of stacked electrically insulating and electrically conducting elements about the crucible area so that a proper temperature gradient is established and controlled....http://www.google.es/patents/US5134261?utm_source=gb-gplus-sharePatente US5134261 - Apparatus and method for controlling gradients in radio frequency heating
Apparatus and method for controlling gradients in radio frequency heating
