Integrated circuit system employing alternating conductive layers
View Patent ↗An integrated circuit system that includes: providing a substrate including front-end-of-line circuitry; forming a first conductive level including a first conductive trace over the substrate; forming a second conductive level spaced apart from the first conductive level and including a second conductive trace; and connecting the first conductive level to a third conductive level with a viabar that passes through the second conductive level without contacting the second conductive trace.
1. A method of manufacturing an integrated circuit system comprising:
providing a substrate including front-end-of-line circuitry;
forming a first conductive layer including adjacent first conductive traces over the substrate;
forming a viabar with a horizontal via length at least twice as long as a horizontal via width to separate horizontally the adjacent first conductive traces in the first conductive layer;
forming a second conductive layer spaced apart from and not overlapping the first conductive layer, the second conductive layer including adjacent second conductive traces separated horizontally by another of the viabar; and
connecting third conductive layer to the first conductive layer by one of the viabar separating the adjacent second conductive traces, the viabar connecting the first conductive layer and the third conductive layer passing through the second conductive layer without contacting the adjacent second conductive traces as part of a vertical parallel plate capacitor structure.
2. The method as claimed in claim 1 wherein:
forming the second conductive layer spaced apart from the first conductive layer includes offsetting the second conductive traces within the second conductive layer vertically and horizontally from the first conductive traces within the first conductive layer.
3. The method as claimed in claim 1 wherein:
forming the first conductive traces and the second conductive traces include forming the first conductive traces of a first polarity and forming the second conductive traces of a second polarity.
4. The method as claimed in claim 1 wherein:
connecting the first conductive layer to the third conductive layer includes forming a first conductive plate.
5. The method as claimed in claim 1 further comprising:
connecting the second conductive layer to a fourth conductive by another of the viabar passing through the third conductive layer without contacting the first conductive traces within the third conductive layer.
6. A method for manufacturing an integrated circuit system comprising:
providing a substrate including a first region and a second region formed over the substrate, the substrate including front-end-of-line circuitry;
forming a first conductive layer including adjacent first conductive traces over the substrate;
forming a viabar with a horizontal via length at least twice as long as a horizontal via width to separate horizontally the adjacent first conductive traces in the first conductive layer;
forming a second conductive layer spaced apart from and not overlapping the first conductive layer, the second conductive layer including adjacent second conductive traces separated horizontally by another of the viabar;
forming a third conductive layer including the adjacent first conductive traces over the first conductive layer and connected to the first conductive layer by one of the viabar separating the adjacent second conductive traces to form a first conductive plate within the first region as part of a vertical parallel plate capacitor structure, the viabar connecting the first conductive layer and the third conductive layer passing through the second conductive layer without contacting the adjacent second conductive traces; and
forming a fourth conductive layer including the second conductive traces over the second conductive layer and connected to the second conductive layer by another of a viabar to form a second conductive plate within the first region.
7. The method as claimed in claim 6 wherein:
forming the first conductive plate and the second conductive plate includes forming the first conductive plate adjacent the second conductive plate.
8. The method as claimed in claim 6 wherein:
forming the first conductive plate and the second conductive plate includes forming the first conductive plate and the second conductive plate of opposite polarities.
9. The method as claimed in claim 6 wherein:
forming the first conductive plate and the second conductive plate includes forming the vertical parallel plate capacitor structure.
10. The method as claimed in claim 6 further comprising:
forming the second conductive traces spaced in-between and over two of the first conductive traces.
11. An integrated circuit system comprising:
a substrate including front-end-of-line circuitry;
a first conductive layer including adjacent first conductive traces over the substrate;
a viabar with a horizontal via length at least twice as long as a horizontal via width separating horizontally the adjacent first conductive traces in the first conductive layer;
a second conductive layer spaced apart from and not overlapping the first conductive layer, the second conductive layer including adjacent second conductive traces separated horizontally by another of the viabar; and
a third conductive layer connected to the first conductive layer by one of the viabar separating the adjacent second conductive traces, the viabar connecting the first conductive layer and the third conductive layer passing through the second conductive layer without contacting the adjacent second conductive traces as part of a vertical parallel plate capacitor structure.
12. The system as claimed in claim 11 wherein:
the second conductive traces within the second conductive layer are vertically and horizontally offset from the first conductive traces within the first conductive layer.
13. The system as claimed in claim 11 wherein:
the first conductive traces include a first polarity and the second conductive traces include a second polarity.
14. The system as claimed in claim 11 wherein:
the first conductive layer, the third conductive layer and the viabar separating the adjacent second conductive traces form a first conductive plate.
15. The system as claimed in claim 14 further comprising:
a fourth conductive layer connected to the second conductive layer by another of the viabar passing through the third conductive layer without contacting the first conductive traces within the third conductive layer, wherein the second conductive layer, the fourth conductive layer and the viabar passing through the third conductive layer form a second conductive plate.
16. The system as claimed in claim 15 wherein:
the first conductive plate is adjacent the second conductive plate.
17. The system as claimed in claim 15 wherein:
the first conductive plate is a first polarity and the second conductive plate is a second polarity.
18. The system as claimed in claim 15 wherein:
the first conductive plate and the second conductive plate form the vertical parallel plate capacitor structure.
19. The system as claimed in claim 11 wherein:
one of the second conductive trace is in-between and over two of the first conductive trace to achieve sub-design rule spacing.
20. The system as claimed in claim 11 wherein:
the substrate includes a first region with the vertical parallel plate capacitor structure and a second region with an interconnect area.