1. LESSON-20. Diode

2. 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 D[/JX[P

3. CRYSTAL STRUCTURE Co-valent bond:

4. TYPES Semi- conductor Intrinsic Semi- conductor Extrinsic Semi- conductor N-TypeP-Type

5. N-TYPE SEMI-CONDUCTOR Penta-valent impurity Construction Electron current

6. P-TYPE SEMI-CONDUCTOR Tri-valent impurity Construction Hole current

7. P-N JUNCTION DIODE Construction of Diode Diffusion Depletion layer Equolibrium potential Barrier potential

8. CHARACTERISTICS OF DIODE Reverse bias:Forward bias:

9. DIODE G]\ JUL"SZ6 Diode GL SZ\8 JCGq5FJZ C[g0,L\U SZJFGL 1FDTFGF VFWFZ[o,M 5FJZ 0FIM0 DL0LID 5FJZ 0FIM0 CF. 5FJZ 0FIM0 Diode GL D]bIp5IMULTFGF VFWFZ[o ;Ld5, 0FIM0 :JLRL\U 0FIM0 Z[S8LËFIZ 0FIM0 AGFJ8G[ VFWFZ[o 5M.g8 SMg8[S8 0FIM0 H\SXG 0FIM0

10. 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.

11. CONCLUTION VF ZLT[ VFH[ VF56[ ;[DLS\0S8Z 0FIM0 lJX[ DFlCTL D[/JLP