A semiconductor which has an excess of conducting holes. It is created by adding trace amounts of other elements to the original pure semiconductor crystal. Today's transistors all require sections of both N- type and P-type semiconductors.

A semiconductor with extra holes. (See dopants )

A semiconductor in which holes carry the current; produced by doping an intrinsic semiconductor with an electron acceptor impurity (e.g., boron in silicon).

A P-type semiconductor is obtained by carrying out a process of doping, that is adding a certain type of atoms to the semiconductor in order to increase the number of free (in this case positive) charge carriers.