Semiconductor package

1. A semiconductor package comprising:

a silicon substrate stacked product formed by stacking a plurality of silicon substrates, the silicon substrate stacked product including a first single silicon substrate having a first cavity to be a through hole and a second single silicon substrate having a second cavity to be a bottomed hole, the first single silicon substrate being mounted to a side of the second single silicon substrate in which the second cavity is formed, and said silicon substrate stacked product having a first cavity side and a second cavity side; and

a plurality of electronic device chips stacked and mounted on the second cavity side of the silicon substrate stacked product, at least one of the electronic device chips is electrically connected to a through electrode formed in the second single silicon substrate via a bump.

2. The semiconductor package according to claim 1 , further comprising:

an airtight cover which covers an opening portion of the second cavity.

3. The semiconductor package according to claim 1 , wherein an opening of a bottom part of the bottomed hole of the second single silicon substrate is linked to the through hole of the first single silicon substrate.

4. A semiconductor package comprising:

a silicon substrate stacked product formed by stacking a plurality of silicon substrates, the silicon substrate stacked product including a first single silicon substrate having a first cavity to be a through hole and a second single silicon substrate having a second cavity to be a bottomed hole, the first single silicon substrate being bonded to a first face of the second single silicon substrate which is opposite to a second face of the second single silicon substrate from which the second cavity is formed;

a through electrode formed in the second single silicon substrate; and

an electronic device chip provided in one of the first cavity and the second cavity of the silicon substrate stacked product.

5. The semiconductor package according to claim 4 , wherein a first plurality of electronic device chips is mounted in the first cavity and a second plurality of electronic device chips is mounted in the second cavity.

6. The semiconductor package according to claim 5 , wherein a bottom part of the bottomed hole of the second single silicon substrate includes the first face and the second face, the first plurality of electronic device chips being provided on the first face, the second plurality of electronic device chips being provided on the second face.

7. The semiconductor package according to claim 6 , further including:

a first wiring pattern located on the first face and electrically connected to the first plurality of electronic device chips,

a second wiring pattern located on the second face and electrically connected to the second plurality of electronic device chips, and

the through electrode extending through the bottom part for electrically connecting the first wiring pattern to the second wiring pattern.

8. The semiconductor package according to claim 7 , further including a wiring provided on a sidewall of the first cavity and a back wiring located at a peripheral edge of the first cavity, the wiring electrically connecting the first wiring pattern and the back wiring.

9. The semiconductor package according to claim 5 , wherein one of the first cavity and second cavity is filled with resin.

10. The semiconductor package according to claim 4 , wherein the electronic device chip is electrically connected to the through electrode formed in the second single silicon substrate.

11. The semiconductor package according to claim 4 , wherein the first single silicon substrate has a tapered shape.

12. The semiconductor package according to claim 4 , wherein the second single silicon substrate has a tapered shape.

13. The semiconductor package according to claim 4 , wherein the through electrode formed in the second single silicon substrate has a tapered shape.