1. Early quartz crucible Early quartz crucible is all transparent, the earliest quartz crucible is all the transparent structure, this transparent structure is easy to cause lead to uneven heat transfer conditions, increase the difficulty of crystal growth. So this crucible is basically eliminated.

     2. Modern quartz crucible Modern pull single crystal quartz crucible is generally produced by arc method, translucent, is to pull large diameter monocrystalline silicon, the development of large-scale integrated circuits essential basic materials of modern quartz crucible exists Two structures, the outside is a layer with a high bubble density of the region, known as the bubble composite layer, the inside is a layer of 3 ~ 5mm transparent layer, known as the bubble empty layer. The purpose of the bubble composite layer is to provide a radiant heat source provided by the heater with a uniform radiation. The purpose of the bubble empty layer is to reduce the bubble density in the contact area with the solution, and to improve the success rate of single crystal growth and the quality of the ingot.