2. I II III IV

4. Solid State Device Conductor Semiconductor Anti-conductor Elemental Semiconductor Compound Semiconductor Extrinsic (Doped) N-type, P-type Intrinsic (Undoped) Si, Ge Diodes Transistors General Special U-wave Point-contact diode Zener diode Light emitting diode Schottky diode Varactor diode Photo diode Tunnel diode Gunn diode PIN diode BJT FET (unipolar) NPN transistor PNP transistor Binary semiconductor GaAs, ZnS, InP Trinary semiconductor GaAsP, AlGaAs Quaternary semiconductor InGaAsP HBT/HEMT JFET MOSFET MESFET NMOS PMOS CMOS PHEMT MHEMT The Flowchart of Solid State Device Insulator

5. Silicate Single crystal Si Poly crystal silicon Silicate

6. Doping: adding of impurities (i.e., dopants) to the intrinsic semi-conductor material. N-type: adding Group V dopant (or donor) such as As, P, Sb,… P-type: adding Group III dopant (or acceptor) such as Al, B, Ga,…

7. There is no movement of charge through a pn-junction at equilibrium  The pn-junction form a diode which allows current in only one direction and prevent the current in the other direction as determined by the bias.

8. dc voltage positive terminal connected to the p region and negative to the n region. It is the condition that permits current through the pn-junction of a diode.

10. dc voltage negative terminal connected to the p region and positive to the n region. Depletion region widens until its potential difference equals the bias voltage, majori ty-carrier current ceases.

11. majority-carrier current ceases. * However, there is still a very small current produced by minority carriers.

12. As reverse voltage reach certain value, avalanche occurs and generates large current

18. https://www.youtube.com/watch?v=cyhzpFqXwdA Diode Tutorial & How to build an AC to DC power supply How a PN-junction semiconductor works https://www.youtube.com/watch?v=OyC02DWq3mI What is a zener diode? https://www.youtube.com/watch?v=bXEyCf1P0UU What is a schottky diode? https://www.youtube.com/watch?v=xSQHfsHTS88

19. The datasheets of Diode 1N4004, 1N4733A are uploaded in u-campus. PPT files in Korean and English language are uploaded in u-campus. A supplement PPT file including detailed diode analysis is uploaded in u-campus.

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