Abstract: A heat sink includes a frame having an opening, the opening extending in a thickness direction of the frame, the opening having a first opening part and a second opening part, the second opening part being larger than the first opening part in a plan view perpendicular to the thickness direction, a wall standing on the frame at an edge of the opening, a groove formed in the frame beside the wall, and a plate member including a first plate disposed in the first opening part and a second plate disposed in the second opening part and larger than the first plate in the plan view, wherein the second opening part is larger than the second plate in the plan view to leave a gap therebetween, and the wall is bent toward the opening to be in contact with an edge along a perimeter of the second plate.

Abstract: A heat sink includes a frame having an opening, the opening extending in a thickness direction of the frame, the opening having a first opening part and a second opening part, the second opening part being larger than the first opening part in a plan view perpendicular to the thickness direction, a wall standing on the frame at an edge of the opening, a groove formed in the frame beside the wall, and a plate member including a first plate disposed in the first opening part and a second plate disposed in the second opening part and larger than the first plate in the plan view, wherein the second opening part is larger than the second plate in the plan view to leave a gap therebetween, and the wall is bent toward the opening to be in contact with an edge along a perimeter of the second plate.

Abstract: A heat radiating plate storage tray has a plate main body, and a plurality of first projection portions provided on a first surface of the plate main body. A heat radiating plate having a rectangular recessed portion on a surface thereof is capable of being mounted on the first surface of the plate main body, a top face of the first projection portion supports a bottom face of the recessed portion of the heat radiating plate, and a height of the first projection portion is larger than a depth of the recessed portion of the heat radiating plate.

Abstract: A heat radiating plate for a semiconductor package has a concave portion provided on a surface of the heat radiating plate, having an inner bottom face and an inner wall portion, a stepped portion provided on the inner wall portion of the concave portion and a plating portion covering an entire surface of the inner bottom portion of the concave portion.

Abstract: A heat radiating plate storage tray has a plate main body, and a plurality of first projection portions provided on a first surface of the plate main body. A heat radiating plate having a rectangular recessed portion on a surface thereof is capable of being mounted on the first surface of the plate main body, a top face of the first projection portion supports a bottom face of the recessed portion of the heat radiating plate, and a height of the first projection portion is larger than a depth of the recessed portion of the heat radiating plate.