Semiconductor device and stacked semiconductor device that can increase flexibility in designing a stacked semiconductor device

1. A semiconductor device that includes a semiconductor element having a plurality of electrodes arranged on one principal surface thereof and a wiring substrate having a conductive layer provided on an insulating substrate,

wherein the wiring substrate includes the insulating substrate, the conductive layer formed on a surface of the insulating substrate, and an insulating protection layer selectively covering the conductive layer, and

wherein the wiring substrate is arranged in a substantially U-shape along an outer edge of the semiconductor element with the insulating protection layer being an inner side so that the conductive layer faces the electrodes of the semiconductor element and the wiring substrate selectively covers a part of the one principal surface and a part of the other principal surface, an end of the conductive layer of the wiring substrate is directly connected to the electrodes of the semiconductor element on the principal surface, and the other end of the conductive layer extends in a direction opposite to the semiconductor element from a surface of the insulating substrate to an opposite surface thereof via a throughhole formed in the insulation layer on the other principal surface side of the semiconductor element.

2. The semiconductor device as claimed in claim 1 , wherein the conductive layer is electrically connected to a contact portion of a mounting board mounting the semiconductor element thereon.

3. The semiconductor device as claimed in claim 1 , wherein the conductive layer is electrically connected to an electrode provided in another semiconductor element.

4. The semiconductor device as claimed in claim 1 , wherein the conductive layer is made of a metal material.

5. The semiconductor device as claimed in claim 1 , wherein the insulating substrate is made of polyimide.

6. The semiconductor device as claimed in claim 1 , wherein the insulating protection layer is made of polyimide.

7. A semiconductor device that includes a semiconductor element having a plurality of electrodes arranged on one principal surface thereof and a wiring substrate having a conductive layer provided on an insulating substrate,

wherein the wiring substrate is arranged in a substantially U-shape along an outer edge of the semiconductor element so that the conductive layer faces the electrodes of the semiconductor element, an end of the conductive layer of the wiring substrate is directly connected to the electrodes of the semiconductor element, and the other end of the conductive layer extends in a direction opposite to the semiconductor element on the other principal surface side of the semiconductor element,

wherein the wiring substrate includes the insulating substrate, the conductive layer formed on a surface of the insulating substrate, and an insulating protection layer selectively covering the conductive layer, wherein the insulating protection layer is adhesive, and the wiring substrate is fixed to the semiconductor element by the adhesive.

8. The semiconductor device as claimed in claim 7 , wherein the insulating protection layer is a double-faced tape made of an insulating resin.

9. A stacked semiconductor device formed by stacking a plurality of semiconductor elements by using the semiconductor device as claimed in claim 1 .

10. The semiconductor device as claimed in claim 7 , wherein the conductive layer extends from a surface of the insulating substrate to an opposite surface thereof via a throughhole formed in the insulating layer.

11. The semiconductor device as claimed in claim 1 , wherein the wiring substrate comprises a plurality of stacking components separately positioned along the outer edges of the semiconductor element.

12. The semiconductor device as claimed in claim 1 , wherein the wiring substrate is arranged in a substantially u-shape only along an outer edge of the semiconductor element.