Chip embedded substrate and method of producing the same
A method of producing a chip embedded substrate is disclosed. This method comprises a first step of mounting a semiconductor chip on a first substrate on which a first wiring is formed; and a second step of joining the first substrate with a second substrate on which a second wiring is formed. In the second step, the semiconductor chip is encapsulated between the first substrate and the second substrate and electrical connection is made between the first wiring and the second wiring so as to form multilayered wirings connected to the semiconductor chip.
1. A chip embedded substrate, comprising:
a first substrate on which a first wiring is formed and a semiconductor chip is mounted so as to be connected to the first wiring; and
a second substrate on which a second wiring is formed, the second substrate being joined with the first substrate;
wherein a first connection layer that is connected to the first wiring and exposed from a solder resist layer formed in the first substrate and a second connection layer that is connected to the second wiring and exposed from a solder resist layer formed in the second substrate are electrically connected with each other by an electrical connection member,
wherein the semiconductor chip and the electrical connection member are encapsulated by an insulation layer between the first substrate and the second substrate, and the first substrate and the second substrate are adhered by the insulation layer,
wherein the first substrate has an electrically conductive layer provided in an entire inner layer of the first substrate when seen from above,
wherein an electrically conductive layer provided in the second substrate is electrically connected to the electrical connection member connected to the first substrate, and
wherein the semiconductor chip mounted on the first substrate is electrically shielded by the electrically conductive layer provided in the first substrate, the electrically conductive layer provided in the second substrate, and the electrical connection member.
2. The chip embedded substrate of claim 1 , wherein the electrical connection member is made by coating a solder layer on a surface of a metal ball.
3. The chip embedded substrate of claim 1 , wherein the electrical connection between the first wiring and the second wiring is made by an electrically conductive post.
4. The chip embedded substrate of claim 1 , wherein the electrical connection between the first wiring and the second wiring is made by a bump formed of a bonding wire.
5. The chip embedded substrate of claim 1 , wherein portions that connect the first wiring and the second wiring are arranged in a staggered manner when seen from above the portions.
6. The chip embedded substrate of claim 1 , wherein the encapsulating connection layer includes an anisotropic electrically conductive material.
7. The chip embedded substrate of claim 1 , wherein the electrical connection member is an electrically conductive post.
8. The chip embedded substrate of claim 1 , wherein the electrical connection member is a bump formed of a bonding wire.
9. The chip embedded substrate of claim 1 , wherein the first substrate includes an opening that allows an electronic part mounted on the second substrate to be exposed therethrough.
10. The chip embedded substrate of claim 9 , wherein the second substrate includes an opening that allows an electronic part mounted on the first substrate to be exposed therethrough.
11. The chip embedded substrate of claim 9 , wherein an electronic part is encapsulated along with the semiconductor chip in the insulation layer.
12. The chip embedded substrate of claim 9 , wherein the electronic part is stacked on the semiconductor chip.