Multi-chip package and method of providing die-to-die interconnects in same
A multi-chip package includes a substrate ( 110 ) having a first side ( 111 ), an opposing second side ( 112 ), and a third side ( 213 ) that extends from the first side to the second side, a first die ( 120 ) attached to the first side of the substrate and a second die ( 130 ) attached to the first side of the substrate, and a bridge ( 140 ) adjacent to the third side of the substrate and attached to the first die and to the second die. No portion of the substrate is underneath the bridge. The bridge creates a connection between the first die and the second die. Alternatively, the bridge may be disposed in a cavity ( 615, 915 ) in the substrate or between the substrate and a die layer ( 750 ). The bridge may constitute an active die and may be attached to the substrate using wirebonds ( 241, 841, 1141, 1541 ).
1. A multi-chip package comprising:
a substrate having a first side, an opposing second side, and a third side that extends from the first side to the second side, the third side constituting a portion of an outside perimeter of the substrate;
a first die attached to the first side of the substrate;
a second die attached to the first side of the substrate;
a third die attached to the first side of the substrate;
a fourth die attached to the first side of the substrate;
a bridge within an opening of the substrate, the bridge attached to the first die, to the second die, to the third die and to the fourth die, wherein the bridge creates a connection between the first die and the second die.
2. The multi-chip package of claim 1 , wherein the bridge further creates a connection between the first die and the third die.
3. The multi-chip package of claim 1 , wherein the bridge further creates a connection between the first die and the fourth die.
4. The multi-chip package of claim 1 , wherein the bridge comprises silicon.
5. The multi-chip package of claim 1 , wherein the opening of the substrate completely laterally surrounds the bridge.
6. The multi-chip package of claim 1 , wherein the bridge has an exposed backside opposite the first die, the second die, the third die and the fourth die.
7. The multi-chip package of claim 1 , wherein portions of the first die, the second die, the third die and the fourth die overhanging the bridge have interconnect structures with a smaller pitch than interconnect structures of portions of the first die, the second die, the third die and the fourth die not overhanging the bridge.
8. The multi-chip package of claim 1 , wherein the first die, the second die, the third die and the fourth die are flip chip or controlled collapse attached to the bridge.
9. The multi-chip package of claim 1 , wherein the bridge does not include a through silicon via.
10. The multi-chip package of claim 1 , further comprising one or more wire bonds coupling the bridge die to the substrate.
11. A multi-chip package comprising:
a substrate having a first side, an opposing second side, and a third side that extends from the first side to the second side, the third side constituting a portion of an outside perimeter of the substrate;
a first die attached to the first side of the substrate;
a second die attached to the first side of the substrate;
a third die attached to the first side of the substrate;
a fourth die attached to the first side of the substrate;
a bridge within a cavity within the substrate, the bridge attached to the first die, to the second die, to the third die and to the fourth die, wherein the bridge creates a connection between the first die and the second die.
12. The multi-chip package of claim 11 , wherein the bridge is surround by a protective material within the cavity, the protective material selected from the group consisting of an encapsulant, an underfill material, and an epoxy.
13. The multi-chip package of claim 11 , wherein the bridge further creates a connection between the first die and the third die.
14. The multi-chip package of claim 11 , wherein the bridge further creates a connection between the first die and the fourth die.
15. The multi-chip package of claim 11 , wherein the bridge comprises silicon.
16. The multi-chip package of claim 11 , wherein the cavity within the substrate completely laterally surrounds the bridge.
17. The multi-chip package of claim 11 , wherein portions of the first die, the second die, the third die and the fourth die overhanging the bridge have interconnect structures with a smaller pitch than interconnect structures of portions of the first die, the second die, the third die and the fourth die not overhanging the bridge.
18. The multi-chip package of claim 11 , wherein the first die, the second die, the third die and the fourth die are flip chip or controlled collapse attached to the bridge.
19. The multi-chip package of claim 11 , wherein the bridge does not include a through silicon via.
20. The multi-chip package of claim 11 , further comprising one or more wire bonds coupling the bridge die to the substrate.