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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0842153 (2007-08-21) |
등록번호 | US-8471384 (2013-06-25) |
발명자 / 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 1 인용 특허 : 517 |
A method of closely interconnecting integrated circuits contained within a semiconductor wafer to electrical circuits surrounding the semiconductor wafer. Electrical interconnects are held to a minimum in length by making efficient use of polyimide or polymer as an inter-metal dielectric thus enabli
A method of closely interconnecting integrated circuits contained within a semiconductor wafer to electrical circuits surrounding the semiconductor wafer. Electrical interconnects are held to a minimum in length by making efficient use of polyimide or polymer as an inter-metal dielectric thus enabling the integration of very small integrated circuits within a larger circuit environment at a minimum cost in electrical circuit performance.
1. An integrated circuit chip comprising: a silicon substrate;multiple devices in and on said silicon substrate wherein said multiple devices comprise a transistor;a first dielectric layer over said silicon substrate;a first metallization structure over said first dielectric layer, wherein said firs
1. An integrated circuit chip comprising: a silicon substrate;multiple devices in and on said silicon substrate wherein said multiple devices comprise a transistor;a first dielectric layer over said silicon substrate;a first metallization structure over said first dielectric layer, wherein said first metallization structure comprises a first metal layer and a second metal layer over said first metal layer, wherein said first metallization structure comprises electroplated copper;a second dielectric layer between said first and second metal layers;a passivation layer over said first metallization structure and said first and second dielectric layers, wherein a first opening in said passivation layer is over a first contact point of said first metallization structure, and said first contact point is at a bottom of said first opening, and wherein a second opening in said passivation layer is over a second contact point of said first metallization structure, and said second contact point is at a bottom of said second opening, wherein said passivation layer comprises a nitride layer; anda second metallization structure over said passivation layer and on said first and second contact points, wherein said first contact point is connected to said second contact point through said second metallization structure, wherein said integrated circuit chip has a signal path for passing a signal from said first contact point, up through said first opening, over a distance in a direction of a horizontal plane of said second metallization structure, and down through said second opening to said second contact point. 2. The integrated circuit chip of claim 1, wherein said second metallization structure comprises electroplated copper. 3. The integrated circuit chip of claim 1, wherein said second metallization structure comprises aluminum. 4. The integrated circuit chip of claim 1, wherein said second metallization structure comprises nickel. 5. The integrated circuit chip of claim 1 further comprising a polymer layer on said passivation layer, wherein a third opening in said polymer layer is over said first contact point, and a fourth opening in said polymer layer is over said second contact point, wherein said second metallization structure is further on said polymer layer. 6. The integrated circuit chip of claim 5, wherein said polymer layer has a thickness between 2 and 30 micrometers. 7. The integrated circuit chip of claim 5, wherein said polymer layer comprises polyimide. 8. The integrated circuit chip of claim 5, wherein said polymer layer comprises benzocyclobutene (BCB). 9. The integrated circuit chip of claim 1, wherein said nitride layer has a thickness between 0.5 and 2 micrometers. 10. The integrated circuit chip of claim 1, wherein said passivation layer further comprises an oxide layer under said nitride layer. 11. An integrated circuit chip comprising: a silicon substrate;multiple devices in and on said silicon substrate, wherein said multiple devices comprise a transistor;a first dielectric layer over said silicon substrate;a first metallization structure over said first dielectric layer, and wherein said first metallization structure comprises a first metal layer and a second metal layer over said first metal layer;a second dielectric layer between said first and second metal layers;a passivation layer over said first metallization structure and said first and second dielectric layers, wherein a first opening in said passivation layer is over a first contact point of said first metallization structure, and said first contact point is at a bottom of said first opening, wherein a second opening in said passivation layer is over a second contact point of said first metallization structure, and said second contact point is at a bottom of said second opening, wherein said passivation layer comprises a nitride layer; anda second metallization structure over said passivation layer and on said first and second contact points, wherein said first contact point is connected to said second contact point through said second metallization structure, wherein said integrated circuit chip has a signal path for passing a signal from said first contact point, up through said first opening, over a distance in a direction of a horizontal plane of said second metallization structure, and down through said second opening to said second contact point, wherein said second metallization structure comprises an electroplated metal. 12. The integrated circuit chip of claim 11, wherein said first metallization structure comprises electroplated copper. 13. The integrated circuit chip of claim 11, wherein said first metallization structure comprises aluminum. 14. The integrated circuit chip of claim 11 further comprising a polymer layer on said passivation layer, wherein a third opening in said polymer layer is over said first contact point, and a fourth opening in said polymer layer is over said second contact point, wherein said second metallization structure is further on said polymer layer. 15. The integrated circuit chip of claim 14, wherein said polymer layer has a thickness between 2 and 30 micrometers. 16. The integrated circuit chip of claim 14, wherein said polymer layer comprises polyimide. 17. The integrated circuit chip of claim 14, wherein said polymer layer comprises benzocyclobutene (BCB). 18. The integrated circuit chip of claim 11, wherein said nitride layer has a thickness between 0.5 and 2 micrometers. 19. The integrated circuit chip of claim 11, wherein said passivation layer further comprises an oxide layer under said nitride layer. 20. An integrated circuit chip comprising: a silicon substrate;multiple devices in and on said silicon substrate, wherein said multiple devices comprise a transistor;a first dielectric layer over said silicon substrate;a metallization structure over said first dielectric layer, wherein said metallization structure comprises a first metal layer and a second metal layer over said first metal layer;a second dielectric layer between said first and second metal layers;a passivation layer over said metallization structure and said first and second dielectric layers, wherein said passivation layer comprises a nitride layer;a metal trace over said passivation layer;multiple power or ground pads arranged in an area array in a region of said integrated circuit chip, wherein said area array has at least four rows defined as multiple center rows and at least four columns, wherein no signal pad is arranged in said area array;multiple first peripheral pads arranged in at least three rows defined as multiple top rows along a first edge of said integrated circuit chip, wherein one of said multiple first peripheral pads is connected to said metal trace, wherein said multiple first peripheral pads in each of said multiple top rows comprise at least six continuously-arranged signal pads, wherein a first pitch between each neighboring two of said at least six continuously-arranged signal pads in one of said multiple top rows is different from a second pitch between neighboring two of said multiple power or ground pads in one of said multiple center rows;multiple second peripheral pads arranged in at least three rows defined as multiple bottom rows along a second edge of said integrated circuit chip, wherein said second edge is opposite to said first edge, wherein said multiple second peripheral pads in each of said multiple bottom rows comprise at least six continuously-arranged signal pads, wherein said multiple center rows are between said multiple top rows and said multiple bottom rows, wherein a third pitch between each neighboring two of said at least six continuously-arranged signal pads in one of said multiple bottom rows is different from said second pitch; andmultiple metal bumps on said multiple first and second peripheral pads. 21. The integrated circuit chip of claim 20, wherein said metallization structure comprises electroplated copper. 22. The integrated circuit chip of claim 20, wherein said multiple metal bumps comprise multiple solder bumps over said multiple first and second peripheral pads. 23. The integrated circuit chip of claim 20, wherein said nitride layer has a thickness between 0.5 micrometers and 2 micrometers. 24. The integrated circuit chip of claim 20, wherein said passivation layer further comprises an oxide layer under said nitride layer. 25. The integrated circuit chip of claim 20, wherein said area array has at least five rows and at least five columns. 26. The integrated circuit chip of claim 20, wherein said first pitch is smaller than said second pitch. 27. An integrated circuit chip comprising: a silicon substrate;multiple devices in and on said silicon substrate, wherein said multiple devices comprise a transistor;a first dielectric layer over said silicon substrate;a first metallization structure over said first dielectric layer, wherein said first metallization structure comprises a first metal layer, a second metal layer over said first metal layer, a first metal interconnect, a second metal interconnect and a third metal interconnect between said first and second metal interconnects, wherein said first metallization structure comprises electroplated copper;a second dielectric layer between said first and second metal layers;a separating layer over said first metallization structure and said first and second dielectric layers, wherein a first opening in said separating layer is over a first contact point of said first metal interconnect, and said first contact point is at a bottom of said first opening, and wherein a second opening in said separating layer is over a second contact point of said second metal interconnect, and said second contact point is at a bottom of said second opening, wherein said first opening has a width between 0.5 and 3 micrometers;a second metallization structure over said separating layer, over said third metal interconnect and on said first and second contact points, wherein said second metallization structure comprises aluminum in said first and second openings and over said separating layer, wherein said first contact point is connected to said second contact point through said second metallization structure; anda solder bump on said second metallization structure, wherein said solder bump is connected to said first contact point through said second metallization structure, and wherein said solder bump is connected to said second contact point through said second metallization structure. 28. The integrated circuit chip of claim 27 further comprising a polymer layer over said separating layer. 29. The integrated circuit chip of claim 27, wherein said separating layer comprises a nitride layer. 30. The integrated circuit chip of claim 27, wherein said separating layer comprises an oxide layer. 31. The integrated circuit chip of claim 11, wherein said electroplated metal of said second metallization structure comprises electroplated copper. 32. The integrated circuit chip of claim 20, wherein said at least six continuously-arranged signal pads in each of said multiple top rows comprise at least eight continuously-arranged signal pads, and wherein said at least six continuously-arranged signal pads in each of said multiple bottom rows comprise at least eight continuously-arranged signal pads. 33. An integrated circuit chip comprising: a silicon substrate;multiple devices in and on said silicon substrate, wherein said multiple devices comprise a transistor;a first dielectric layer over said silicon substrate;a first metallization structure over said first dielectric layer, wherein said first metallization structure comprises a first metal layer and a second metal layer over said first metal layer, wherein said first metallization structure comprises electroplated copper;a second dielectric layer between said first and second metal layers;a separating layer over said first metallization structure and said first and second dielectric layers, wherein a first opening in said separating layer is over a first contact point of said first metallization structure, and said first contact point is at a bottom of said first opening, and wherein a second opening in said separating layer is over a second contact point of said first metallization structure, and said second contact point is at a bottom of said second opening; anda second metallization structure over said separating layer and on said first and second contact points, wherein said first contact point is connected to said second contact point through said second metallization structure, wherein said integrated circuit chip has a signal path for passing a signal from said first contact point, up through said first opening, over a distance in a direction of a horizontal plane of said second metallization structure, and down through said second opening to said second contact point, wherein said second metallization structure comprises aluminum. 34. The integrated circuit chip of claim 33, wherein said separating layer comprises a nitride layer. 35. The integrated circuit chip of claim 33, wherein said separating layer comprises a nitride layer having a thickness between 0.5 and 2 micrometers. 36. The integrated circuit chip of claim 33 further comprising a polymer layer over said separating layer, wherein said polymer layer has a thickness between 2 and 30 micrometers. 37. The integrated circuit chip of claim 33 further comprising a polymer layer on said separating layer, wherein said polymer layer has a thickness between 2 and 30 micrometers, wherein said second metallization structure is further on a top surface of said polymer layer.
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