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What is difference between ohmic and rectifying contact?
A p-n junction (or a metal-semiconductor junction) with rectifying behaviour is an electronic device which allows a one-way only current flow (between the two semiconductor regions, or between the metal and the semiconductor). An ohmic contact in a metal-semiconductor junction is realized by lowering the potential barrier (allowing electrons to easily migrate into the metal) and by increasing the doping levels in the semiconductor (more than 10^18 cm^-3): this way the potential barrier, that should stop electrons from migrating into the semiconductor, is confined in a very small region making it possible for electrons with low energy to pass through it (tunneling effect). This means that in a ohmic contact current can flow both ways; such a device apparently works like a resistor with a low resistance, hence the "ohmic contact" name.
What is the difference between metal and semiconductor?
A semiconductor's resistivity decreases with increasing temperature. A metal's resistivity increases with increasing temperature.
Diffusion potential in p-n junction?
The built in potential in a pn junction. Due to the difference in carrier concentration between the sides of a pn junction. Diffusion potential increases with increase in doping levels.
What are the essential differences between a semiconductor junction diode and a tunnel diode?
A: The essential difference is while it will behave like a normal diode at some at .6 forward voltage it has a negative impedance area before this point is reached it is not a very stable area to maintain and has the tendency to switch from one mode [low level] to the other .6v and very fast endeed.
Difference between Schottky Barrier Diodes and PN junction diodes?
Difference between Schottky Barrier Diode and P-N Junction Diode is as following...Schottky Diode1) Usually using the aluminum metal which is trivalent element. 2) Depletion layer is thinner than the p-n junction diode.3) Forward threshold voltage is smaller than p-n junction diode(0.1V).4) The junction capacitance is lower than p-n junction diode.P-N Junction Diode1) Trivalent impurity is added to the pure silicon structure. 2) Depletion layer is wider than Schottky diode.3) Forward threshold voltage is higher than Schottky diode(0.6V)4) The junction capacitance is higher than Schottky diode.
What is the difference between central station and junction?
The difference between central and junction stations are their locations. A junction station is usually close to a junction station while central stations are not.
What is difference between ohmic and rectifying contact?
A p-n junction (or a metal-semiconductor junction) with rectifying behaviour is an electronic device which allows a one-way only current flow (between the two semiconductor regions, or between the metal and the semiconductor). An ohmic contact in a metal-semiconductor junction is realized by lowering the potential barrier (allowing electrons to easily migrate into the metal) and by increasing the doping levels in the semiconductor (more than 10^18 cm^-3): this way the potential barrier, that should stop electrons from migrating into the semiconductor, is confined in a very small region making it possible for electrons with low energy to pass through it (tunneling effect). This means that in a ohmic contact current can flow both ways; such a device apparently works like a resistor with a low resistance, hence the "ohmic contact" name.
What is the difference between metal and semiconductor?
A semiconductor's resistivity decreases with increasing temperature. A metal's resistivity increases with increasing temperature.
What is the difference between semiconductor and electronics?
A semiconductor is a device which is neither a Insulator nor a conductor. They behave like one in the right conditions.
Difference between NPN and PNP?
NPN and PNP are transistor types. The difference in the way the layers of semiconductor material are doped with impurities.
Is there a connection between a metalloid and a semiconductor?
What is the connection between a metaloid and a semiconductor
How can thermocouple measure the temperature?
Thermocouples are two junctions of two dissimilar metal conductors. One junction is the sensing junction and the other is the reference junction. The voltage between the two junctions depends on the temperature difference between the junctions (Seebeck effect). The voltage can be measured and the temperature difference determined based on known readings of the voltage produced by the metals. If the temperature of the reference junction is known, then the temperature of the sensing junction can be calculated.
Diffusion potential in p-n junction?
The built in potential in a pn junction. Due to the difference in carrier concentration between the sides of a pn junction. Diffusion potential increases with increase in doping levels.
Difference between intrinsic and exterinsic semiconductors?
Answer An intrinsic semiconductor is a pure semiconductor. An extrinsic semiconductor is doped with trivalent of pentavalent impurities. semiconductors allow only a little amount of electricity to pass through them.they are of two types - n type and p typeAre made of the semiconductor material in its purest from
What is difference between semiconductor and superconductor?
A semiconductor only allows some electrons to flow across its junction. It has some resistance, in fact more resistance than a conductor but less than an insulator. A superconductor has no resistance.
What is a difference between forbidden energy gap depletion region in semiconductor?
forbidden energy gap or energy gap or band gap or band or Eg is the gap between the top of the valance band and bottom of the conduction band. If we apply the energy equivalent to Eg then the electrons in valance band will jump to the conduction band. Ravinder kumar meena stpi n depletion region is the region in semiconductor where there is depletion of free charge carriers.Ravinder kumar meena stpi n
What is the difference between SIPs and DIPs?
A SIP (single inline package) is a semiconductor chip (monolith) that has one row of pins a DIP (dual inline package) is a semiconductor chip (monolith) that has two rows of pins
