In this technique, a small piece of semiconductor material called the germ was brought into contact with the surface of a material like it in the liquid phase, and then be pulled slowly from the liquid. When the sprouts are pulled slowly, the solid appears between the liquid-solid contact class. Often the crystals are also slow when it is being pulled to the mix, resulting in a more uniform temperature. The impurity atoms, such as Boron or Phosphorus can be added to a semiconductor are melting
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