Semiconductor device

A semiconductor device, comprising:

• a first arm block including:
• a first circuit pattern that, in a plan view of the semiconductor device, has a first recess formed thereon that extends inward in a first direction from a side thereof, the first recess forming a first disposition area;
• a second circuit pattern having at least a part disposed in the first disposition area;
• and
• a plurality of first semiconductor chips formed on the first circuit pattern, each first semiconductor chip having
• a first positive electrode on a back surface thereof, and
• a first control electrode and a first negative electrode on a front surface thereof, the first negative electrode being electrically connected to the second circuit pattern by a first wiring member;
• and
• a second arm block including:
• a third circuit pattern that, in the plan view, has a second recess formed thereon that extends inward in a second direction from a side thereof, the second direction being opposite to the first direction, the second recess forming a second disposition area;
• a fourth circuit pattern having at least a part disposed in the second disposition area;
• and
• a plurality of second semiconductor chips formed on the third circuit pattern, each second semiconductor chip having
• a second positive electrode on a back surface thereof, and
• a second control electrode and a second negative electrode on a front surface thereof, the second negative electrode being electrically connected to the fourth circuit pattern by a second wiring member.