1. (a) The phosphorus atom is called aim purity. (Ipts) (b) The boron atom is ca
ID: 1766253 • Letter: 1
Question
1. (a) The phosphorus atom is called aim purity. (Ipts) (b) The boron atom is called a () impurity.(1pts) (c) Among two basic processes that cause electrons and holes to move in a semiconductor, what is the name of the process due to the variations in the concentration of carriers? (2pts) (d) In the pn-junction, what is the name of region that does not have any carriers when there is no bias? (2pts) (e) In an n-channel MOSFET, the ) layer exists when the gate (2pts) voltage is greater than the threshold voltage of VTN. )-mode MOSFET when the (0 Among n-channel MOSFETs, it is called a channel exists when zero volts are applied to the gate generating drain to source current. (2pts)Explanation / Answer
a) pentavalent impurity: because it has 5 valence electrons
b)trivalent impurity ( boron has three valence electrons)
c)Doping is the process which changes the concentration of carriers
d)depletion region has no charge carriers
e) conduction layer will exist near the oxide layer
f)Depletion mode mosfet : it is normally switched on without the application of Gate bias voltage
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