INTEGRATED CIRCUIT INDUCTOR WITH DOPED SUBSTRATE
First Claim
1. An integrated circuit, comprising:
- a spiral inductor; and
a p-type substrate that has n-type doped regions, wherein the n-type doped regions are arranged in a triangular comb-shaped pattern of strips on the p-type substrate, wherein the strips are perpendicular to the spiral of the inductor, and wherein the n-type doped regions are positively biased such that the p-type substrate is depleted between the strips of n-type doped regions.
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Accused Products
Abstract
An integrated circuit inductor and a substrate with doped regions are provided. The substrate may be a p-type substrate and the substrate may have n-type doped regions. The n-type doped regions may include n-type wells, deep n-type wells, and n+ regions. The n-type doped regions may be formed in a pattern of strips such as a triangular comb pattern of strips or a series of L-shaped strips. The strips may be oriented perpendicular to the spiral of the inductor. A positive bias voltage may be applied to the n-type doped regions to create a depleted region in the substrate between the n-type doped regions. The depleted region may increase the effective distance between the inductor and the substrate, minimizing undesired coupling effects between the inductor and the substrate and increasing the effectiveness of the inductor.
52 Citations
22 Claims
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1. An integrated circuit, comprising:
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a spiral inductor; and a p-type substrate that has n-type doped regions, wherein the n-type doped regions are arranged in a triangular comb-shaped pattern of strips on the p-type substrate, wherein the strips are perpendicular to the spiral of the inductor, and wherein the n-type doped regions are positively biased such that the p-type substrate is depleted between the strips of n-type doped regions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An integrated circuit, comprising:
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a spiral inductor; and a p-type substrate below the spiral inductor that has n-type doped regions, wherein the n-type doped regions are arranged in L-shaped strips on the p-type substrate. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An integrated circuit, comprising:
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a spiral inductor; and a p-type substrate below the spiral inductor that has n-type doped regions, wherein the n-type doped regions are positively biased such that the p-type substrate is completely depleted between the n-type doped regions. - View Dependent Claims (20, 21, 22)
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Specification