Patent ID: 7372130

Claim:
A semiconductor device comprising: an insulating tape having a first surface, a second surface opposite the first surface, an opening penetrating the insulating tape, a plurality of holes, an elongated slit zone formed with a continuous slit or a plurality of serially arranged slits disposed between said opening and said plurality of holes, an inner area surrounded by said elongated slit zone, and an outer area separated from said inner area by said elongated slit zone, said opening being disposed at said inner area, said plurality of holes being disposed at said outer area along peripheries of the tape; a plurality of leads formed on one of the first and second surfaces of the tape so that each of said plurality of leads includes a portion suspended at said opening and reaches into a corresponding one of said plurality of holes; a semiconductor chip having a plurality of electrodes on a main surface thereof, the semiconductor chip being disposed within said inner area so that the electrodes are exposed to said opening and connected with the suspended portions of the corresponding leads at said opening; an encapsulant comprised of an insulating resin so as to cover the main surface of the semiconductor chip, the leads and a portion of the tape on said inner area and so as to fill said opening but to expose said slit zone and said plurality of holes; bump electrodes provided on the leads extending out of the holes so that the semiconductor chip and the bump electrodes are disposed on the same surface side of the leads and so that tops of the bump electrodes project from the holes over the thickness of the semiconductor chip; and at least one layer of an insulating material formed on the outer area of the tape in a manner to expose the slit zone and the surfaces of said leads in said holes on which surfaces said bump electrodes are not formed, wherein the semiconductor chip is rectangular-shaped, the encapsulant enclosing the semiconductor chip is also rectangular-shaped, and said elongated slit zone is provided in a manner to be bent along the corners of the encapsulant.