Semiconductor device

1. A semiconductor device, comprising:

a semiconductor module;

a cooler;

a spring member configured to press the semiconductor module against the cooler;

a strut fixed to the cooler; and

a beam member that is connected with the strut and configured to compress the spring member, wherein

the cooler includes a pressed part to which the semiconductor module is pressed, and a strut fixing part to which the strut is fixed, and

the strut fixing part has higher rigidity than the pressed part.

2. The semiconductor device according to claim 1 , wherein

the cooler includes a cooling fin, and

dimensional data of a part of the cooling fin located in a region corresponding to the strut fixing part is different from dimensional data of a part of the cooling fin located in a region corresponding to the pressed part.

3. The semiconductor device according to claim 1 , wherein

the cooler includes a cooling fin;

the cooling fin includes a first cooling fin corresponding to the pressed part, and a second cooling fin corresponding to the strut fixing part, and

a shape of the first cooling fin is different from a shape of the second cooling fin.

4. The semiconductor device according to claim 3 , wherein

the cooling fin has a bellows shape having a plurality of gaps in a plane perpendicular to a lamination direction of the semiconductor device, and

a length of the second cooling fin is larger than a length of the first cooling fin in a direction perpendicular to a width direction of the gaps on the plane.

5. The semiconductor device according to claim 4 , wherein

a sum of a gap of the second cooling fin and a thickness of a plate that constitutes the second cooling fin is smaller than a sum of a gap of the first cooling fin and a thickness of a plate that constitutes the first cooling fin.