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Quartz crystals are found in a mined mineral formed as well as man-made fused quartz forms. Fused quartz is a high purity, crystalline form of silica used in specialized applications such as semiconductor wafer boats, furnace tubes, bell jars or quartzware, silicon melt crucibles, high performance...

...are then melted in the quartz crucibles of the rows of crystal pullers in the factory. Then crystal growth and the pulling of the ingots takes place, followed by the sawing of the silicon rods, edge rounding of the newly sliced wafers, grinding and lapping, polishing, and cleaning. The process concludes...

...us evaluate feedstocks and crystalgrowth techniques with less material and faster turnarounds, " says SPI Senior Casting Engineer Chenlei Wang. , Pittsburgh, Pa., provides the FEA software. The minicaster loads silicon into a vitreous-quartz crucible supported and shielded by graphite plates...

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