Difference between electronic grade silicon and metallurgical grade silicon

Polycrystalline silicon

difference between electronic grade silicon and metallurgical grade silicon

Electronic-grade silicon (EGS or EG-Si) or semiconductor-grade silicon (SGS) is a highly-purified version of the metallurgical-grade silicon with.

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Electronic-grade silicon EGS or EG-Si or semiconductor-grade silicon SGS is a highly-purified version of the metallurgical-grade silicon with extremely low impurities suitable for microelectronic device applications. Electronic-grade silicon is the raw material used for the growth of single-crystal silicon in the manufacturing of silicon wafers. Creating EGS is expensive and is thus only usually justified for integrated circuits. For other applications such as solar cells and liquid crystal displays, EGS is cost prohibitive, making upgraded metallurgical-grade silicon UMG-Si a much more attractive alternative. While pure silicon referred to as metallurgical-grade silicon is of very good quality, it is still unsuitable for electronic device fabrication. Even impurities in the order of parts per million or less have significant impact on carrier mobility , reliability, and other aspects of the microelectronic device. Metallurgical-grade silicon must be furthered purified to levels of usually less than a part per billion in order to be called electronic-grade silicon which can be used in subsequent fabrication steps.

Addison Engineering provides Silicon wafers that are available with a wide range of characteristics specifications to select from. Click here to get wafer pricing. Elemental silicon also has a large impact on the modern world economy. Although most free silicon is used in the steel refining, aluminum-casting, and fine chemical industries, the relatively small portion Silicon chips are the basis of modern electronic and computing. The silicon must be ultrapure, although depending on final use it may be doped with part per million levels of arsenic, boron, gallium, germanium, or phosphorus. The use of silicon in semiconductor devices requires a much higher purity than metallurgical grade silicon. This method, known as early as , has the potential to directly produce solar-grade silicon without any carbon dioxide emission at much lower energy consumption.

MGS is not considered pure enough to be used for electronics and must be further purified into either extremely pure electronic-grade silicon.
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MGS is not considered pure enough to be used for electronics and must be further purified into either extremely pure electronic-grade silicon which can be used for integrated circuit fabrication or slightly purer upgraded metallurgical-grade silicon which can be used in cheaper electronic devices such as solar cells and liquid crystal displays. Despite being the second most abundant element in the Earth's crust, silicon is rarely found as the pure element. It is most commonly found as silica silicon dioxide , e. It's worth noting that this equation masks a more complex process. In reality, the reaction involves the formation of solid silicon carbide SiC and gaseous silicon monoxide SiO intermediates. The two gases then flow to the cooler area of the furnace where the silicon monoxide is further reacts with the carbon to form silicon carbide SiC.

As solar cell manufacturing continues to grow at a record-setting pace, increasing demands are placed on universities to educate students on both the practical and theoretical aspects of photovoltaics. As a truly interdisciplinary field, young professionals must be fluent with the science, engineering, policy, and market dimensions of this technology, in the context of a growing renewable energy economy. The best way to contact the authors is to leave a comment. You will need to create an account but I can then reply to you and it will be seen by others. We often have requests for the computer code behind all the calculators on the site. The code is in Javascript to run fast in the browser but the downside is that it is hard to share outside the site and not as useful for learning. To make the code more accessible it is now also in Python.



Solar Grade Silicon Production Union Carbide Process

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4 thoughts on “Difference between electronic grade silicon and metallurgical grade silicon

  1. In practice, when can I say that this material is solar grade or metallurgical grade ? Electronic grade silicon is also a grade of purity of silicon suitable for.

  2. Polycrystalline silicon , also called polysilicon or poly-Si , is a high purity, polycrystalline form of silicon , used as a raw material by the solar photovoltaic and electronics industry.

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