A professional who sets up and operates furnaces to grow semiconductor crystals from materials, such as silicon, quartz, or gallium arsenide. Respnsibilities include:

• Loads furnace with seed crystal, dopant, and crystal growing materials, such as polysilicon, quartz, gallium arsenide, or remelt.
• Reads work order and adjusts furnace controls to regulate operating conditions, such as power level, temperature, vacuum, and rotation speed, according to crystal growing specifications.
• Monitors meltdown of growing material and crystal growth, and adjusts furnace controls.
• Shuts down furnace and unloads crystal ingot after cooling.
• May clean inside furnace, using vacuum cleaner and cleaning supplies, and replace furnace liner and other parts.
• May weigh and crop crystal ingot, slice sample wafer, measure and test ingot for resistivity, and determine crystal orientation.
• May operate computer controls to regulate furnace conditions.