Monocrystalline Silicon Sheet Production for Solar Cells by Advanced Ingot Technology
Recent technological advances in Czochralski crystal growth and ingot wafering by I.D. slicing have improved the economic picture of mono-crystalline sheet material production considerably to the extent that ingot technology is now considered a viable approach to meeting near term cost goals for solar cell material fabrication. Through the introduction of a continuous melt replenishment system, a highly efficient CZ process with minimized operating material costs is achieved. With a solution to cost effective monocrystalline ingot production, efficient ingot slicing becomes the focal point of attention. Wafering the ingot with a conventional I.D. saw presents a major problem in the form of high kerf loss, inflicting a significant impact on cell material costs. Through a low kerf blade construction, dynamic cutting edge control and simultaneous multiple ingot cutting, a major cost reduction for slicing the ingot can be achieved.
KeywordsTransfer Tube Hexagonal Cross Section Thin Blade Stainless Steel Core Pull Speed
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