Basic ELECTRONICS

(2+1)ENGR MUHAMMAD SHAKEEL AKRAM

ELECTRONICS ENGINEERING FICT, BUITEMS.

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CHAPTER 1

INTRODUCTION TO

SEMICONDUCTORS

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COMPARISSON OF Si and C

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Silicon and Germanium

• Germanium is unstable at high temperature

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Covalent bond of Si and Ge

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ENERGY BANDS

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Current in Semiconductor

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Electrons And Hole Conduction

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Electrons And Hole Conduction

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Electrons And Hole Conduction

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Intrinsic and Extrinsic semiconductors

Intrinsic

• Silicon and Germanium in its neutral form

Extrinsic

• Adding impurities using doping in silicon • Makes it either N-type or P- type

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Intrinsic and Extrinsic semiconductors

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Intrinsic and Extrinsic semiconductors

N- type • Electrons in majority carriers• Holes in minority carriers

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Intrinsic and Extrinsic semiconductors

P- type • Electrons in minority carriers• Holes in majority carriers

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Diode

• PN junction is formed between N-type and P-type portion

• Diode conduct in only one Direction.

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Diode

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Diode

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Diode

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Diode

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Diode

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Diode

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Diode

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