What is diffusion and Ion Implantation ?

In summary, ion implantation is the process of accelerating material ions in an electric field and impacting them into a silicon wafer, while diffusion is the process of introducing impurities into a wafer surface by allowing atoms to move through heating. Doping is the act of adding impurities to a material to modify its conduction properties, and it can be achieved through both diffusion and ion implantation. The main difference between the techniques is the method of introducing the impurities into the material. Ion implantation involves a high-energy beam of ions, while diffusion relies on heating the material to allow atoms to move.
  • #1
vead
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Q1what is ion implantation in wafer fabrication ?
Ion implantation is process by which ion of material accelerated in electric field and impacted into silicon wafer

Q2what is diffusion in wafer fabrication ?
 
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  • #2
You seem to have answered Q1, what about Q2?
 
  • #3
Maybe a few videos on the subjects will help.

Ion Implantation 101:

 
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  • #4
I need to write Definition

look at this

Ion Implantation is process by which ion of material are accelerated in electric field and placed into wafer

diffusion is process by which impurity introduced into wafer surface

doping - adding impurity into wafer surface

I don't understand what is difference between doping, diffusion and ion Implantation?
 
  • #5
Doping is adding atoms to a material to modify the conduction properties, for example to make an N type conductor or a P type conductor.

Diffusion is allowing atoms of one material to move by heating it enough that the atoms can move to other positions. One can dope silicon by putting arsenic (or other dopants) on the silicon surface, and putting the silicon wafer in an oven at a temperature that allows the arsenic atoms to diffuse (or move) into the silicon and modify the conduction properties. By choosing the proper temperature and diffusion time it can be possible to control the depth and concentration of the arsenic in a way that is useful for making a desired semiconductor device.

Ion implantation is making a beam of energetic ions and allowing them to hit a surface made of some material -- a material different from the ions. It is used to modify the properties of the material being bombarded. It can also be used to dope semiconductors. The high energy of the ions can damage the lattice structure that is being doped, so it is usually necessary to anneal the semiconductor by heating to allow it to "heal itself". Ion implantation can also be used to harden metal surfaces or change their friction properties by choosing the right type of ions to implant.
 

1. What is diffusion?

Diffusion is a process in which molecules or atoms move from areas of higher concentration to areas of lower concentration. This movement is driven by the random thermal motion of particles and results in a net movement of particles from an area of high concentration to an area of low concentration, until equilibrium is reached.

2. How does diffusion occur?

Diffusion occurs due to the random movement of particles, which is a result of the thermal energy of the particles. The particles move from areas of higher concentration to areas of lower concentration, in an attempt to reach equilibrium.

3. What is Ion Implantation?

Ion implantation is a process used in semiconductor manufacturing to introduce impurities into a material, typically silicon. It involves accelerating ions to high energies and then implanting them into the material's surface, where they become embedded and alter the material's properties.

4. How does Ion Implantation work?

In Ion Implantation, ions are accelerated to high energies using an ion implanter. The ions are then directed towards the material's surface, where they penetrate and become embedded in the material. The implanted ions disrupt the crystal structure of the material, altering its properties.

5. What are the applications of diffusion and Ion Implantation?

Diffusion and Ion Implantation are widely used in the semiconductor industry for the production of electronic devices such as transistors, diodes, and integrated circuits. They are also used in other industries, such as in the production of solar cells, medical devices, and coatings for cutting tools.

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