Patent ID: 7948091

Claim:
A mounting structure for a semiconductor element, comprising: a semiconductor element having a surface with an area; a die pad having a surface with a center, a peripheral edge and an area which is greater than the area of the semiconductor element to form a perimeter of the die pad extending beyond the semiconductor element, wherein the die pad includes a plurality of grooves formed radially in the surface thereof, each groove extending continuously from and including the center of the surface toward the peripheral edge and ending in the perimeter but spaced from the peripheral edge of the die pad, wherein each of the grooves has a shape of overlapping, substantial triangles each pointing toward the center of the die pad, and wherein the surface of the semiconductor element is bonded to the surface of the die pad through an adhesive film filling the grooves between the surface of the semiconductor element and the surface of the die pad and in the perimeter; and a wire extending between the semiconductor element and a terminal pad disposed around the die pad.