Substrate for high speed semiconductor package and semiconductor package having the same

Abstract

The substrate for a semiconductor package includes a substrate body having a first surface and a second surface opposite to the first surface. Connection pads are formed near an edge of the first surface. Signal lines having conductive vias and first, second, and third line parts are formed. The first line parts are formed on the first surface and are connected to the connection pads and the conductive vias, which pass through the substrate body. The second line parts are formed on the first surface and connect to the conductive vias. The third line parts are formed on the second surface and connect to the conductive vias. The second and third line parts are formed to have substantially the same length. The semiconductor package utilizes the above substrate for processing data at a high speed.

1 . A substrate for a semiconductor package, comprising:
 a substrate body having a first surface and a second surface on the opposite side of the first surface;   a plurality of connection pads formed near an edge of the first surface; and   a plurality of signal lines, each signal line comprising:
 a first line part formed on the first surface and connected to a connection pad; 
 a conductive via connected to the first line part and formed to pass through the substrate body; 
 a second line part formed on the first surface and connected to the conductive via; and 
 a third line part formed on the second surface and connected to the conductive via, wherein the third line part and the second line part have substantially the same length. 
   
   
   
       2 . The substrate according to  claim 1 , wherein the each first line part is formed along a central portion of the first surface. 
   
   
       3 . The substrate according to  claim 1 , wherein each third line part is formed to connect to a predetermined one of the conductive vias and each third line part extends along the second surface, and the second line part connected to the predetermined one of the conductive vias extends along the first surface in the opposite direction. 
   
   
       4 . The substrate according to  claim 1 , further comprising:
 a plurality of first ball lands formed on the first surface, 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, wherein each second ball land is formed on an end of a predetermined one of third line parts.   
   
   
       5 . The substrate according to  claim 4 , further comprising:
 a first solder resist pattern formed on the first surface and having a plurality of first openings such that the first openings expose each of the connection pads and each of the first ball lands; and   a second solder resist pattern formed on the second surface and having a plurality of second openings such that the second openings expose each of the second ball lands.   
   
   
       6 . 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 near an 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; and 
 
   a main substrate supporting the sub-semiconductor package and having connection pads which are connected to the sub-connection pads.   
   
   
       7 . The semiconductor package according to  claim 6 , wherein each of the first line parts extend toward a central portion of first surface of the sub-substrate body. 
   
   
       8 . The semiconductor package according to  claim 6 , 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. 
   
   
       9 . The semiconductor package according to  claim 6 , 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.   
   
   
       10 . The semiconductor package according to  claim 9 , 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.   
   
   
       11 . The semiconductor package according to  claim 6 , wherein the sub-connection pads of the sub-substrate are connected to the connection pads of the main substrate by conductive connection members. 
   
   
       12 . The semiconductor package according to  claim 11 , wherein each conductive connection member comprises any one of a conductive wire, a conductive pin, a conductive ball and, a conductive bump. 
   
   
       13 . The semiconductor package according to  claim 6 , 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.   
   
   
       14 . The semiconductor package according to  claim 13 , wherein the gap-maintaining member comprises an adhesive element and beads, wherein each bead is formed to have a uniform size. 
   
   
       15 . The semiconductor package according to  claim 14 , wherein the beads are formed using any one of a metal, a ceramic, and a polymer. 
   
   
       16 . The semiconductor package according to  claim 6 , wherein the first and second semiconductor chips are the same kind of semiconductor chips. 
   
   
       17 . The semiconductor package according to  claim 6 , wherein the first and second semiconductor chips are different kinds of semiconductor chips. 
   
   
       18 . The semiconductor package according to  claim 6 , further comprising:
 a molding member for encapsulating the second semiconductor chip.   
   
   
       19 . The semiconductor package according to  claim 6 , wherein ball lands are formed on the main substrate and are connected to the connection pads. 
   
   
       20 . The semiconductor package according to  claim 6 , 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. 
   
   
       21 . The semiconductor package according to  claim 20 , 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. 
   
   
       22 . The semiconductor package according to  claim 6 , 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.