Patent ID: 8610261

Claim:
A power semiconductor device comprising: a power semiconductor module sealed with transfer molding resin; and an insert case for setting the power semiconductor module to a cooling fin, wherein the power semiconductor module includes: power semiconductor elements mounted on a wiring pattern of a circuit substrate; and cylindrical conductors, having openings, joined to the wiring pattern so as to be substantially perpendicular to the wiring pattern, the openings being exposed at a surface of the transfer molding resin and configured to face an inner surface side of a ceiling portion of the insert case, wherein the insert case includes: the ceiling portion and peripheral walls; and a plurality of external terminals embedded in the ceiling portion such that the plurality of external terminals penetrate through the ceiling portion; outer-surface-side connecting portions of the plurality of external terminals for connecting the power semiconductor device with an external wiring being formed so as to protrude at a top surface side of the ceiling portion, inner-surface-side connecting portions of the plurality of external terminals for connecting with the cylindrical conductors exposing at the surface of the transfer molding resin being formed so as to protrude at the inner surface side of the ceiling portion, and the inner-surface-side connecting portions having the same length; the ends of the inner-surface-side connecting portions of the external terminals having press fit structures; the insert case is configured to be pressed toward the power semiconductor module, whereby each of the inner-surface-side connecting portions of the plurality of external terminals embedded in the ceiling portion is connected into the respective cylindrical conductors formed in the power semiconductor module sealed with the transfer molding resin all together by press-fitting, and the insert case is connected with the power semiconductor module.