Radially-increasing core power bus grid architecture
First Claim
1. An integrated circuit, comprising:
- a plurality of circuits provided on a substrate of semiconductor material; and
a power bus grid in electrical communication with the plurality of circuits, wherein the grid has a plurality of main bars and bus bars, the bus bars having a cross-sectional area that varies as a function of the distance from the nearest connection to a main bar.
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Accused Products
Abstract
A power bus grid architecture for an integrated circuit including a plurality of main bars assembled along the perimeter of the grid and a plurality of bus bars assembled within the perimeter of the grid. The bus bars are each composed of a plurality of segments with each segment having a substantially constant width. Each segment on certain bus bars has a different width from the next adjacent segment. The width of a particular segment is determined by the distance of the segment from the nearest main power bar. Because the current flow through the segments nearest to the main power bar tends to be greater than the current flow through the segments further from the main power bar, the segments nearest to the main power bar can be made much wider than the segments furthest from the main power bar without significant deleterious effects to the circuit from voltage drops or electromigration.
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Citations
12 Claims
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1. An integrated circuit, comprising:
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a plurality of circuits provided on a substrate of semiconductor material; and a power bus grid in electrical communication with the plurality of circuits, wherein the grid has a plurality of main bars and bus bars, the bus bars having a cross-sectional area that varies as a function of the distance from the nearest connection to a main bar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An integrated circuit, comprising:
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a plurality of circuits provided on a substrate of semiconductor material; and a power bus grid in electrical communication with the plurality of circuits, wherein the grid has a plurality of main bars and bus bars, the bus bars having portions that are relatively closer to the main bars and portions that are relatively further from the main bars, wherein the closer portions have a cross-sectional area that is relatively greater than a cross-sectional area of the further portions.
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12. An integrated circuit, comprising:
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a plurality of circuits provided on a substrate of semiconductor material; and a power bus grid including multiple, spaced-apart, substantially-planar layers, with each layer including a generally rectangular arrangement of main bars connectable to a power supply, each layer also including a plurality of bus bars arranged in the shape of a grid, wherein each bus bar includes a plurality of segments, the bus bars having segments that are relatively closer to the main bars and segments that are relatively further from the main bars, wherein the closer segments have a cross-sectional area that is relatively greater than a cross-sectional area of the further segments.
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Specification