CURRENT FLOW IN A P-TYPE MATERIAL conduction is by positive holes
instead of negative electrons. Unlike the electron, the hole moves from the
positive terminal of the P-type material to the negative terminal.
JUNCTION BARRIER - an electrostatic field that has been created by the joining
of a section of N-type material with a section of P-type material. Since holes
and electrons must overcome this field to cross the junction, the electrostatic
field is commonly called a BARRIER. Since there is a lack or depletion of free
electrons and holes in the area around the barrier, this area has become known
as the DEPLETION REGION.
23 June 2005