HORTICULTURE SCIENCE
APPLICATION OF NANO TECHNOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the purity allows the wafer to be thin
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the purity and crystal structure affect the melting point
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the purity and crystal structure affect the properties
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the purity makes the wafer shiny
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Detailed explanation-1: -For example, it is well-known that silicon wafers need to be refined to a purity of 99.9999999% (wt %) (nine nines) for integrated cir-cuits.
Detailed explanation-2: -Silicon used in a semiconductors such as an integrated circuits (IC) requires a single crystal structure of ultra-high-purity “99.999999999%” (the so-called “eleven nines”) and is refined using various processes after extraction.
Detailed explanation-3: -Float-zone silicon is a high-purity alternative to crystals grown by the Czochralski process. The concentrations of light impurities, such as carbon and oxygen, are extremely low.
Detailed explanation-4: -The pure form of silicon has an atomic structure that makes it highly effective as a semiconductor. This means it has the conductive properties of metal as well as being an insulator, so silicon can conduct and block electricity. This ability makes silicon ideal as a switching mechanism.