Thyristor with main electrodes on anode and cathode sides - has conductor on substrate whose current flows in opposite direction to that in substrate

摘要

The main electrodes are provided on the thyristor semiconductor substrate. Each electrode is connected to a supply current electrode. To the semiconductor substrate (1) is associated a conductor whose current is of opposite direction, at least in the section (13) nearest to the substrate, to that flowing through the substrate. Preferably the conductor is formed by one of the supply current electrodes (5, 6). Alternately the conductor may carry auxiliary current. The near section of the conductor may be adjacent to the control electrode (7), centrally located on the substrate. Both the control electrode and substrate may have coaxial apertures (9, 10), through which passes the supply current electrode (6) for connection to the main electrode (2) at anode side.