Semi COnductors / Dopping

Dear All,

SEMI CONDUCTORS: they are materials which at normal state they are insulators but under certain forces like VOLTAGE, they become conductors. When this force removed, these materials return to its normal state as insulators without causing any damage to the material itself.

They - Semi Conductors - can switch to both states hundred of thousands in a second. They are used in computer hardware. The most famous materials are

1-GERMANIUM
2-SILICON

When no voltage applied, there will be few hundred to few thousands of ohms but when voltage applied, the resistance will drop to zero.

The semi-conductors will become conductors when adding impurity atoms during the growing of crystal lattice. This is called DOPPING.

B.Regards
Ayman Shak'ah
Licensed Aircraft Maint. Engineer