Patent ID: 8410597

Claim:
A three-dimensional semiconductor device comprising: a conductive plate defining four sides and four recesses formed in the four sides, respectively, wherein the conductive plate has first and second surfaces opposite to each other; a plurality of conductive leads located in the recesses, respectively, wherein the conductive leads have first and second surfaces opposite to each other; a semiconductor die attached onto a central area of the conductive plate; a plurality of conductive wires electrically connecting the semiconductor die to the conductive leads; and an encapsulant enclosing, as in a capsule, the conductive plate, the conductive leads, the semiconductor die, and the conductive wires in such a manner that the first and second surfaces of the conductive plate and the first and second surfaces of the conductive leads are exposed to outside; and wherein the conductive plate further has a third surface opposite to the first surface, located between the first and second surfaces, wherein the third surface connects the recesses with each other, wherein the semiconductor die is attached onto a central portion of the third surface.