- Doping is breaking the regular crystal lattice or structure.
It can be performed on those material that have a regular structure.
- Obviously when we are speaking about doping we imagine to put very few defects.
So there is a perturbation of the electronic band structure not a complete mess up.
- We have intentional doping, and this is a process that is applied in the IC technology.
So when building integrated circuit we use intentional doping to change and to modify the electrical behavior of some particular and specific area of the crystals.
- Then you have unintentional doping.
So it’s like having it doped while preparing it, while growing the crystal.
So an unintentional doping is simply an imperfect control of the crystal production.