Semiconductor unit having a power semiconductor and semiconductor apparatus using the same

A semiconductor apparatus comprising:

• a plurality of the semiconductor units, each of the plurality of semiconductor units comprising:
• electrically conductive plates, each of the plates being in the shape of the letter L, having a flat body portion and a leg portion perpendicular to the flat body portion;
• a pair of a semiconductor chip and a spacer that are laminated and fixed with each other, the pair being sandwiched by a flat body portion of each of two of the electrically conductive plates, the electrically conductive plates being disposed opposing with each other;
• control terminals, one side end of one or more of the control terminals being connected to control electrodes of the semiconductor chip;
• and
• resin that seals off the flat body portions of the electrically conductive plates, the spacer, the semiconductor chip, and the one side ends of the control terminals;
• wherein the leg portions of the electrically conductive plates and ends of the control terminals opposite the one side ends are projecting out of the resin;
• the semiconductor apparatus further comprising:
• a wiring conductor connecting the leg portions of a plurality of the semiconductor units;
• lead out terminals each connected to a leg portion of the plurality of the semiconductor units;
• a cooling plate to which at least one of a lower surface of the leg portion, a lower surface of the wiring conductor, and a lower surface of the lead out terminal are fixed interposing an insulation layer;
• a casing fixed to the cooling plate and containing the semiconductor unit, the wiring conductors, and the lead out terminals, ends of the lead out terminals and ends of the control terminals being projecting out of the casing;
• and
• insulation material in the casing;
• a lid covering the casing at the top thereof;
• a drive circuit board that is disposed inside the casing, immersed in the insulation material, and connected to the control terminals of the semiconductor unit;
• and
• control conductors that are fixed to the drive circuit board and projecting out through the lid.