LESSON-20.Diode

SEMI-CONDUCTOR DIODE

• C[T]VMo• TF,LDFYL"VM diode G] \construction, working

VG[ use lJX[ DFlCTL D[/JX[P• TF,LDFYL"VM diode GF JUL"SZ6 lJX[ DFlCTL

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CRYSTAL STRUCTURE

• Co-valent bond:

TYPES

Semi-conductor

Intrinsic Semi-conductor Extrinsic Semi-conductor

N-Type P-Type

N-TYPE SEMI-CONDUCTOR

• Penta-valent impurity• Construction• Electron current

P-TYPE SEMI-CONDUCTOR

• Tri-valent impurity• Construction• Hole current

P-N JUNCTION DIODE

• Construction of Diode• Diffusion• Depletion layer• Equolibrium potential• Barrier potential

CHARACTERISTICS OF DIODE

• Reverse bias:• Forward bias:

DIODE G]\ JUL"SZ6

• DiodeGL SZ\8 JCGq5FJZ C[g0,L\U SZJFGL 1FDTFGF VFWFZ[o

,M 5FJZ 0FIM0DL0LID 5FJZ 0FIM0CF. 5FJZ 0FIM0

• DiodeGL D]bIp5IMULTFGF VFWFZ[o;Ld5, 0FIM0:JLRL\U 0FIM0Z[S8LËFIZ 0FIM0

• AGFJ8G[ VFWFZ[o5M.g8 SMg8[S8 0FIM0

H\SXG 0FIM0

QUESTIONS

• What is the meaning of Intrinsic & Extrinsic Semi-conductor?

• Which type of impurity is added in the P-type semi-conductor?

• N-type semi-conductor consist of ______.• Write down the classification of diode.

CONCLUTION

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