Semiconductor device with a surface of a semiconductor body exposed through an opening in a sealing resin

A semiconductor device comprising:

• a conductor having an obverse surface facing in a thickness direction;
• a semiconductor element including an element body and a plurality of electrodes, the plurality of electrodes being connected to the element body and bonded to the obverse surface;
• and
• a sealing resin covering the semiconductor element, wherein
• the sealing resin has a top surface and an opening, the top surface facing a same side as the obverse surface in the thickness direction, the opening penetrating the top surface in the thickness direction,
• the element body includes:
• a substrate made of a semiconductor material;
• and a semiconductor layer located closer to the obverse surface than is the substrate in the thickness direction and electrically connected to the plurality of electrodes,
• the substrate has a base surface facing the same side as the obverse surface in the thickness direction,
• the base surface is exposed through the opening,
• the conductor includes a plurality of first leads and a plurality of second leads,
• the plurality of first leads are elongated in a first direction orthogonal to the thickness direction and spaced apart from each other in a second direction orthogonal to the thickness direction and the first direction,
• the plurality of second leads are spaced apart from the plurality of first leads in the second direction,
• the plurality of first leads and the plurality of second leads each have a reverse surface opposite to the obverse surface in the thickness direction,
• the plurality of first leads include an input terminal to which direct voltage is applied,
• the input terminal includes a main section elongated in the first direction and a pair of side sections connected to opposite ends of the main section in the first direction,
• each of the side sections includes an end surface connected to the obverse surface and the reverse surface of the input terminal, the end surface facing in the first direction,
• each of the side sections is formed with a constriction, and
• in each of the side sections, the constriction causes a dimension of the end surface in the second direction to be smaller than a dimension of the reverse surface of the main section in the second direction.