(under subclass 403) Subject matter wherein at least one path includes a three or more electrode semiconductor device of the type having at least two potential barriers and having a controlled current flow of both majority and minority carriers (i.e., holes and electrons).
(1) Note. Npn and pnp type transistors are conventional bipolar transistors; each has three regions, three electrodes and two junctions. Each of the three regions is connected externally by a terminal labeled emitter, base, or collector.
