- #1
Patrick Underwood
- 7
- 2
I’m using an inductive heater to try to melt some 99.85% polycrystalline silicon, as would occur in the Czochralski process, but the silicon workpiece is not melting let alone even getting hot. The silicon workpiece is about the size of a playing dice. It becomes conductive at 200 F and becomes fully conductive at 230 F. Even after preheating the workpiece well above the point at which it becomes conductive, the inductive heater still doesn’t “take over” to raise the temperature. The inductive heater works fine with other conductive materials such as iron, aluminum, and copper and heats them quite effectively. Heating silicon inductively is a well established process but due to confidentiality I have not come across any details regarding the frequency needed.
- The frequency of the heater I am using is 90KHz and was confirmed with an oscilloscope.
- The frequency of the heater I am using is 90KHz and was confirmed with an oscilloscope.