Patent ID: 8319319

Claim:
A semiconductor package comprising: a chip pad on which a semiconductor device is disposed; lead terminals, wherein the chip pad and at least one of the lead terminals comprise a plurality of grooves, each of the grooves being between groove defining walls of a corresponding one of the chip pad and the at least one of the lead terminals; and an enveloping unit to cover the chip pad and the lead terminals, wherein the grooves are formed such that the grooves recede from a plane of an outermost boundary of the enveloping unit from a surface of the chip pad and the at least one of the lead terminals upon which the grooves are formed, the grooves being formed only partially through the chip pad and the at least one of the lead terminals, toward an opposite surface of the chip pad and the at least one of the lead terminals, and wherein areas of the surface of the chip pad and the at least one of the lead terminals between the receded grooves have a rectilinear shape.