Post passivation interconnection schemes on top of the IC chips
A new method is provided for the creation of interconnect lines. Fine line interconnects are provided in a first layer of dielectric overlying semiconductor circuits that have been created in or on the surface of a substrate. A layer of passivation is deposited over the layer of dielectric, a thick second layer of dielectric is created over the surface of the layer of passivation. Thick and wide interconnect lines are created in the thick second layer of dielectric. The first layer of dielectric may also be eliminated, creating the wide thick interconnect network on the surface of the layer of passivation that has been deposited over the surface of a substrate.
1. A chip structure comprising:
a silicon substrate;
a first repeater in and on said silicon substrate;
a first metallization structure over said silicon substrate, wherein said first metallization structure comprises a first interconnecting structure connected to said first repeater, and wherein said first metallization structure comprises a first metal layer and a second metal layer over said first metal layer;
a dielectric body over said silicon substrate, wherein said first interconnecting structure is in said dielectric body, and wherein said dielectric body comprises a dielectric layer between said first and second metal layers;
a passivation layer over said first metallization structure and over said dielectric body, wherein said passivation layer comprises a nitride layer;
a first via in said passivation layer, wherein said first via is connected to said first interconnecting structure; and
a second metallization structure over said passivation layer and over said first via, wherein said second metallization structure is connected to said first repeater through, in sequence, said first via and said first interconnecting structure.
2. The chip structure of claim 1 , wherein said nitride layer has a thickness greater than 0.4 micrometers.
3. The chip structure of claim 1 further comprising a polymer layer between said passivation layer and said second metallization structure, wherein said polymer layer has a thickness between 2 and 150 micrometers.
4. The chip structure of claim 3 , wherein said polymer layer comprises polyimide.
5. The chip structure of claim 3 further comprising a polymer layer over said second metallization structure, wherein said polymer layer has a thickness between 2 and 150 micrometers.
6. The chip structure of claim 5 , wherein said polymer layer comprises polyimide.
7. The chip structure of claim 1 further comprising a second repeater in and on said silicon substrate and a second via in said passivation layer, wherein said first metallization structure further comprises a second interconnecting structure over said silicon substrate and in said dielectric body, wherein said second interconnecting structure is connected to said second repeater and to said second via, and wherein said first repeater is connected to said second repeater through, in sequence, said first interconnecting structure, said first via, said second metallization structure, said second via and said second interconnecting structure.
8. The chip structure of claim 1 , wherein said second metallization structure comprises electroplated copper.
9. The chip structure of claim 1 , wherein said second metallization structure comprises electroplated gold.
10. The chip structure of claim 1 , wherein said second metallization structure comprises an electroplated metal.
11. The chip structure of claim 1 , wherein said first repeater comprises a driver and a receiver connected to said driver.
12. A chip structure comprising:
a silicon substrate;
a first transceiver in and on said silicon substrate;
a first metallization structure over said silicon substrate, wherein said first metallization structure comprises a first interconnecting structure connected to said first transceiver, and wherein said first metallization structure comprises a first metal layer and a second metal layer over said first metal layer;
a dielectric body over said silicon substrate, wherein said first interconnecting structure is in said dielectric body, and wherein said dielectric body comprises a dielectric layer between said first and second metal layers;
a passivation layer over said first metallization structure and over said dielectric body, wherein said passivation layer comprises a nitride layer;
a first via in said passivation layer, wherein said first via is connected to said first interconnecting structure; and
a second metallization structure over said passivation layer and over said first via, wherein said second metallization structure is connected to said first transceiver through, in sequence, said first via and said first interconnecting structure.
13. The chip structure of claim 12 , wherein said nitride layer has a thickness greater than 0.4 micrometers.
14. The chip structure of claim 12 further comprising a polymer layer between said passivation layer and said second metallization structure, wherein said polymer layer has a thickness between 2 and 150 micrometers.
15. The chip structure of claim 14 , wherein said polymer layer comprises polyimide.
16. The chip structure of claim 14 further comprising a polymer layer over said second metallization structure, wherein said polymer layer has a thickness between 2 and 150 micrometers.
17. The chip structure of claim 16 , wherein said polymer layer comprises polyimide.
18. The chip structure of claim 12 further comprising a second transceiver in and on said silicon substrate and a second via in said passivation layer, wherein said first metallization structure further comprises a second interconnecting structure over said silicon substrate and in said dielectric body, wherein said second interconnecting structure is connected to said second transceiver and to said second via, and wherein said first transceiver is connected to said second transceiver through, in sequence, said first interconnecting structure, said first via, said second metallization structure, said second via and said second interconnecting structure.
19. The chip structure of claim 12 , wherein said second metallization structure comprises electroplated copper.
20. The chip structure of claim 12 , wherein said second metallization structure comprises electroplated gold.
21. The chip structure of claim 12 , wherein said second metallization structure comprises an electroplated metal.
22. The chip structure of claim 12 , wherein said first transceiver comprises a driver and a receiver connected to said driver.
23. The chip structure of claim 3 , wherein said polymer layer comprises benzocyclobutene (BCB).
24. The chip structure of claim 5 , wherein said polymer layer comprises benzocyclobutene (BCB).
25. The chip structure of claim 14 , wherein said polymer layer comprises benzocyclobutene (BCB).
26. The chip structure of claim 16 , wherein said polymer layer comprises benzocyclobutene (BCB).
27. The chip structure of claim 1 , wherein said passivation layer further comprises an oxide layer.
28. The chip structure of claim 12 , wherein said passivation layer further comprises an oxide layer.