SEMICONDUCTOR DEVICE, INVERTER DEVICE PROVIDED WITH SEMICONDUCTOR DEVICE, AND IN-VEHICLE ROTATING ELECTRICAL MACHINE PROVIDED WITH SEMICONDUCTOR DEVICE AND INVERTER DEVICE

摘要

Provided is a semiconductor device including: a first MOS-FET (21) joined to a first base plate (11) via solder (61); a second MOS-FET (22) joined to a second base plate (12) via solder (64); a first lead (31) joining the first base plate (11) and the second MOS-FET (22); and a second lead (32) joining the second MOS-FET (22) and a current path member (13) that gives and receives current flowing through the MOS-FETs (21, 22) to and from the outside. The second base plate (12) is more rigid than both the leads (31, 32), a boundary line (D-D) intersects the second base plate (12) without intersecting both the leads (31, 32), the boundary line including a gap portion (52) along which both the MOS-FETs (21, 22) are opposed to each other, extending in the direction in which both the MOS-FETs (21, 22) are not opposed to each other.