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The buried layer in an npn transistor fabricated on a p-type substrate in an IC is?
Wiki User
∙ 12y ago
The buried layer is for increasing the conductivity of the path the charges take to reach the collector terminal.
Wiki User
∙ 12y ago
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Different between power transistor and transistor that used in small signal?
Power transistor can conduct large amount of currents through it, more than small signal transistor. power transistor has a vertical structure and small signal transistor has horizontal structure.In power transistor quasi saturation region is present which is absent in the small signal transistor. In power transistor there is a inculsion of drift layer which is not there in the small signal transistor. Power dissipation is less in power transistor and it is more in small signal transistor. b.v.polytechnic,vasai pushkar vaity.
What is meaning of npn transistor?
It can be used any where and it is preferred over PNP transistor because mobility of electron is much greater than hole.Some applications of NPN transistorsSwitchingamplification(audio amplifiers)In manufacturing of several ICs(including 741,and TTL(74 series)).
What are Circuit diagrams for thin film transistor and thin film capacitor?
the main difference between the thick film and thin film ics is the method of deposting the layer but not the relative thickness........................
Working of npn transistor?
N-p-n transistor is made by sandwiching thin layer of p-type semiconductor between two layers of n-type semiconductor. It has three terminals, Emitter, Base and collector. The npn transistor has two supplies, one is connected through the emitter base and one through the collector base. The supply is connected such that emitter-base are forward biased and collector base are reverse biased. It means , Base has to be more positive than the emitter and in turn, the collector must be more positive than the base. The current flow in this type of transistor is carried through movement of electrons. Emitter emits electrons which are pulled my the base as it is more positive. these end up in the collector as it is yet more positive. In this way, current flows in the transistor. Transistor can be used as an amplifier, a switch etc.
What does NPN and PNP stand for in transistors?
A transistor is a three-terminal device consisting of 3 layers of semiconductor material. Two of them are one type of semiconductor and the third, a different type. For example, a PNP transistor consists of 2 layers of P-type semiconductor and a layer of N-type semiconductor between them. We can also have the NPN type transistor which has 2 layers of N-type semiconductor and a layer of P-type semiconductor between them. The three terminals are respectively referred to as emitter, base and collector. Transistors are widely used electronic components that perform the function of a switch or an amplifier. The semiconductor material used in transistors is generally silicon, germanium or gallium arsenide. Impurities are added to them in order to create electrically positive (P) or electrically negative (N) behavior. When these layers are joined together the contact potential creates a potential barrier across the PN or NP junction. This potential barrier maintains electrons on the N side and holes on the P side. NPN stands for negative positive negative PNP stands for positive negative positive. GALLIUM ARSENIDE is only used on LEDS manufacturing not transistors ANSWER: NPN negative positive negative SUBSTRATE PNP is opposite of NPN
Number of depletion regions in transistor?
two The transistor has one depletion layer.
What is a definition of substrate?
A substrate is a substance or layer that underlies something, or on which some process occurs, in particular.
How mosfet works inspite of insulator under the gate how the gate attracts or rpels the charge carriers from substrate to form a channel?
For the Proper operation of NMOS Transistor Substrate and Source are connected to the Lower potential, If we are applying a positive Gate voltage with respected to Source Similarly The gate voltage is positive to Substrate Hence due to the body voltage, electrons are accumulated under the oxide layer and forming a channel for conduction.
Why transistor have 4 wire?
The transistor is a three layer (or two junction) device, emitter, base, and collector (or other designations for variations such as FET's). Each layer is connected to a terminal. Three layers - three terminals.
What is another name for depletion mode transistor?
depletion layer depletion zone juntion region space charge region bipolar transistor field effect transistor variable capacitance diode
What is the definition of the term 'substrates'?
A substrate is a substance or layer that is beneath something else. A substrate can be a surface or material that organisms live, grow, or get nourishment from. In biochemistry a substrate isa substance that is acted on by enzymes.
Different between power transistor and transistor that used in small signal?
Power transistor can conduct large amount of currents through it, more than small signal transistor. power transistor has a vertical structure and small signal transistor has horizontal structure.In power transistor quasi saturation region is present which is absent in the small signal transistor. In power transistor there is a inculsion of drift layer which is not there in the small signal transistor. Power dissipation is less in power transistor and it is more in small signal transistor. b.v.polytechnic,vasai pushkar vaity.
What is small piece of semiconducting material on which integrated circuits are etched?
We don't generally "etch" integrated circuits, but, rather, we "grow" them layer by layer on a silicon substrate.
What is the difference between substrate and product?
The substrate is the substance (or substances) that attaches to the enzyme's active site before the reaction occurs.The product is the substance (or substances) that is formed after the enzyme has worked on the substrate.///
What is basic construction of JFET?
A Jfet stands for junction field effect transistor. It is a transistor also known for being the simpleist field effect transistor. The basic construction contains has three parts the P-type input the n-type input and a depletion layer.
What are the differences in the properties between the silicon substrate and the oxide layer?
Silicon Substrate Silicon substrates are mainly used for power semiconductors in automotive, electronics and HF front-end pa. silicon that can be fused with other materials, such as thermal oxide and or silicon nitrite. Oxide Layer An oxide layer is a thin layer or coating of an oxide, such as iron oxide. Such a coating may be protective, decorative or functional. It is a passivizing layer on the surface of the metal, preventing further corrosion.
How rocks layer useful in determining the age of the earth?
they are useful by showing where the fossil is buried then on that certain layer, it will be studied to know the age.
