SEMICONDUCTOR STRUCTURE INCLUDING ISOLATIONS
First Claim
1. A semiconductor structure comprising:
- a substrate comprising a first region and a second region defined thereon, wherein the substrate comprises a first material;
a first isolation comprising a first width in the first region;
a second isolation comprising a second width in the second region; and
a region surrounding the first isolation in the substrate and comprising the first material and a second material,wherein the first width is greater than the second width, a bottom and sidewalls of the first isolation are in contact with the region, and a bottom and sidewalls of the second isolation are in contact with the substrate.
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Abstract
A semiconductor structure includes a substrate having a first region and a second region defined thereon, a first isolation in the first region, a second isolation in the second region, and a region surrounding the first isolation in the substrate. The substrate includes a first material, and the region includes the first material and a second material. The first isolation has a first width, the second isolation has a second width, and the first width is greater than the second width. A bottom and sidewalls of the first isolation are in contact with the region, and a bottom and sidewalls of the second isolation are in contact with the substrate.
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20 Claims
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1. A semiconductor structure comprising:
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a substrate comprising a first region and a second region defined thereon, wherein the substrate comprises a first material; a first isolation comprising a first width in the first region; a second isolation comprising a second width in the second region; and a region surrounding the first isolation in the substrate and comprising the first material and a second material, wherein the first width is greater than the second width, a bottom and sidewalls of the first isolation are in contact with the region, and a bottom and sidewalls of the second isolation are in contact with the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A semiconductor structure comprising:
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a substrate comprising a first region and a second region defined thereon, wherein the substrate comprises a first material; a first isolation in the first region and comprising a first upper portion above a surface line of the substrate and a first lower portion under the surface line of the substrate; a second isolation in the second region and comprising a second upper portion above the surface line of the substrate and a second lower portion under the surface line of the substrate; and a region surrounding the first isolation in the substrate and comprising the first material and a second material, wherein a width of the first upper portion is substantially the same as a width of the first lower portion, and a width of the second upper portion is less than a width of the second lower portion. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A semiconductor structure comprising:
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a substrate comprising a first region and a second region defined thereon, wherein the substrate comprises a first material; a first isolation in the first region; a second isolation in the second region; a region surrounding the first isolation in the substrate and comprising the first material and a second material; a first gate structure covering the first isolation; and a second gate structure covering the second isolation, wherein the second isolation comprises a divot around a top corner, the first isolation comprises a divot-free top corner, and the divot of the second isolation is filled with the second gate structure. - View Dependent Claims (18, 19, 20)
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Specification