Semiconductor package having substrate for high speed semiconductor package

1. A semiconductor package comprising:

a sub-semiconductor package including semiconductor chips and a sub-substrate, the semiconductor chips comprising:

a first semiconductor chip which has first bonding pads facing a first surface of the sub-substrate; and

a second semiconductor chip which has second bonding pads facing a second surface of the sub-substrate, wherein the second bonding pads are formed to directly correspond and align with the first bonding pads;

the sub-substrate comprising:

a sub-substrate body having a first surface and a second surface on the opposite side of the first surface wherein the sub-substrate body is interposed between the first and second bonding pads

a plurality of sub-connection pads formed along a first edge of the first surface of the sub-substrate body;

a plurality of signal lines, each signal line comprising:

a first line part formed on the first surface of the sub-substrate body and connected to a sub-connection pad;

a conductive via connected to the first line part and passing through the sub-substrate body;

a second line part formed on the first surface of the sub-substrate body connected to a first bonding pad and the conductive via; and

a third line part formed on the second surface of the sub-substrate body connected a second bonding pad and the conductive via;

a power line formed such that a first portion of the power line extends laterally along a second edge of the first surface of the sub-substrate body which is adjacent and connected to the first edge of the first surface of the sub-substrate body, a second portion of the power line extends laterally along a third edge of the first surface of the sub-substrate body opposite the second edge, and a third portion of the power line connects the first portion of the power line and the second portion of the power line such that the power line has an “H” shape; and

a main substrate supporting the sub-semiconductor package and having connection pads which are connected to the sub-connection pads.

2. The semiconductor package according to claim 1 , wherein each of the first line parts extend toward a central portion of first surface of the sub-substrate body.

3. The semiconductor package according to claim 1 , wherein each second line part is formed to connect to a predetermined one of the conductive vias and each second line part extends along the first surface of the sub-substrate body, and the third line part connected to the predetermined one of the conductive vias extends along the second surface of the sub-substrate body in the opposite direction.

4. The semiconductor package according to claim 1 , wherein the sub-semiconductor package further includes:

a plurality of first ball lands formed on the first surface of the sub-substrate body, wherein each first ball land is formed on an end of a predetermined one of the second line parts; and

a plurality of second ball lands formed on the second surface of the sub-substrate body, wherein each second ball land is formed on an end of a predetermined one of the third line parts.

5. The semiconductor package according to claim 4 , wherein the sub-semiconductor package further includes:

a first solder resist pattern formed on the first surface of the sub-substrate body and having first openings formed to correspond to each of the sub-connection pads and each of the first ball lands; and

a second solder resist pattern formed on the second surface of the sub-substrate body and having second openings formed to correspond to each of the second ball lands.

6. The semiconductor package according to claim 1 , wherein the sub-connection pads of the sub-substrate are connected to the connection pads of the main substrate by conductive connection members.

7. The semiconductor package according to claim 6 , wherein each conductive connection member comprises any one of a conductive wire, a conductive pin, a conductive ball and, a conductive bump.

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

a gap-maintaining member interposed between the main substrate and the sub-semiconductor package to prevent the semiconductor chips of the sub-semiconductor package from being tilted or warped with respect to the main substrate.

9. The semiconductor package according to claim 8 , wherein the gap-maintaining member comprises an adhesive element and beads, wherein each bead is formed to have a uniform size.

10. The semiconductor package according to claim 9 , wherein the beads are formed using any one of a metal, a ceramic, and a polymer.

11. The semiconductor package according to claim 1 , wherein the first and second semiconductor chips are the same kind of semiconductor chips.

12. The semiconductor package according to claim 1 , wherein the first and second semiconductor chips are different kinds of semiconductor chips.

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

a molding member for encapsulating the second semiconductor chip.

14. The semiconductor package according to claim 1 , wherein ball lands are formed on the main substrate and are connected to the connection pads.

15. The semiconductor package according to claim 1 , wherein first bumps are interposed between the second line parts and the first bonding pads, and second bumps are interposed between the third line parts and the second bonding pads.

16. The semiconductor package according to claim 15 , wherein any one of an anisotropic conductive paste, a non-conductive film, an anisotropic conductive film, and a polymer is interposed between each of the semiconductor chips and the sub-substrate body.

17. The semiconductor package according to claim 1 , wherein the sub-substrate body comprises a flexible substrate for tap-bonding the sub-connection pads formed on the sub-substrate body to the connection pads of the main substrate, by bending a portion of the sub-substrate body.