answersLogoWhite

0

you can't do that, silicon must mantain its crystalline structure without too many broken bonds.

that's the way a junction is made:

you take a lowly-doped silicon, say p, and then make n-ion implantation on its surface. (n-dopant is accelerated by a field and shooted against silicon surface, then a thermal annealing is done to re-estabilish crystalline structure of silicon surface). you stop when

p-dopant is negligible with respect to n. it's like sugar and coffee: if you put a lot of sugar, taste is sweet, and you don't perceive coffee bitter taste.

this is called dopant compensation: if you dope a semiconductor with Nn and Np (# of n and p dopant atoms / volume), the result will be same as having a Nx=Nn-Np doped semiconductor.

that's why in bipolar junction transistors base is doped more than collector but less than emitter (you start with collector, then you make the base and finally the emitter)

User Avatar

Wiki User

16y ago

What else can I help you with?

Related Questions

What are the distinguishing features of an n-channel JFET from a p-channel JFET?

diff. that in n channel & p channel two p type slab in fabricated n type semiconductor & vice -versa


What you understand by the term intrinsic semiconductor and how an intrinsic semiconductor is turned into either a p type or an n type material?

An intransic material is a material that have been used in doping process.There are two type of intrinsic material n type and p type.


How transistor is manufactured?

Transistor is manufactured by Sandwitching an N type semiconductor into two layers of P type or P type into two N type and each layers connection has taken out for applying voltages.


Diffrentiate n-type and p-type?

When pentavalent impurity is added to pure semiconductor, it is known as N-Type semiconductor. In N-type semiconductor electrons are majority carriers where as holes are minority carriers. impurities such as Arsenic, antimony are added. When trivalent impurity is added to pure semiconductor, it is know as P-type semiconductor. In P-type semiconductor holes are majority carriers whereas electrons are minority carriers. Impurities such as indium, galium are added.


What is an explanation of n-type and p-type semiconductors?

In n-type semiconductor, electricity is conducted by NEGATIVE charges (electrons). In a p-type semiconductor, electricity is conducted by POSITIVE charges (holes).


Draw energy band diagram of n type semiconductor?

band diagram of p type semiconductor


How is p type semiconductor formed?

p-type or n-type semiconductor alone is of very limited use in chips -- you can only make a thin-film resistor or parallel-plate capacitor with it. You also need the opposite type, the n-type semiconductor, to make junction diodes and MOS or bipolar transistors, which are essential components in an integrated circuit. ================================


What are the 2 types of semiconductor devices?

N- Type and P- Type :)


What is pnp resistor?

PNP stands forÊjunction transistor having an n-type semiconductorÊ setting between a p-type semiconductor as emitter and a p-type semiconductor as a collector.


How are transistors made?

when p-type and n-type semiconductor materials are joined p-n junction diode is formed


How do you check whether it is a n type or p type in Hall effect?

if hall voltage is positive then it is p-type & if it is negative then it is n-type semiconductor.


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