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What is doping?...

What is doping?

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The process of introducing a small and controlled amount of specific impurity atoms, called dopants, to an intrinsic semiconductor to significantly change its electrical characteristics is called doping.
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Knowledge Check

  • What is amount of doping tansistor ?

    A
    Emitter is moderately doped, collector is heavily doped and base is lightly doped
    B
    Emitter is moderately doped, collector is lightly doped and base is heavily doped
    C
    Emitter is heavily doped, collector is lightly doped and base is moderately doped
    D
    Emitter is heavily doped, collector is moderatly doped and base is lightly doped

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    Give reason : ( a ) Why is Frenkel defect found in AgCl ? ( b ) What is the difference between phosphorus doped and Gallium doped semiconductors ?

    Pure silicon is an insulator. Silicon doped with phosphorus is a semi-conductor. Silicon doped with gallium is also a serni-conductor. What is the difference between two doped silicon semi- conductors ?

    Define the term doping. Pure silicon is an insulator. Silicon doped with phosphorus is a semiconductor. Silicon doped with gallium is also a semi-conductor. What is difference between the two types of semi-conductors ?

    Give reason: (a)Why is Frenkel defect found in AgCl but not in NaCl ? (b)What is the difference between Phosphorus doped and Gallium doped semiconductors ?

    Give reason : (a) Why is Frenkel defect found in AgCl but not in NaCl ? (b) What is the difference between phosphourus doped and Gallium doped semicoductors ?

    Give reason : (a) Why is Frenkel defect found in AgCl ? (b) What is the difference between silicon doped with phosphorus and doped with gallium semi-conductors ?

    What is the difference in the semi - conductors obtained by doping silicon with As or with Ga ?

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