Same-chip multicharacteristic semiconductor structures
First Claim
1. A method comprising:
- providing a semiconductor-on-insulator substrate comprised of a top semiconductor layer overlying an insulation layer, where the insulation layer overlies a bottom silicon layer, where the top semiconductor layer has a first thickness, a first width and a first depth, where the top semiconductor layer comprises a first portion and a second portion;
removing part of the second portion of the top semiconductor layer to achieve at least one of a second width that is less than the first width, and a second depth that is less than the first depth, where the removed part of the second portion is less than an entirety of the second portion;
disposing a first insulator on the first portion of the top semiconductor layer and a second insulator on the second portion of the top semiconductor layer, where a total thickness of the first portion substantially equals a total thickness of the second portion;
forming at least one first device that at least partially overlies and is disposed upon the first insulator and the first portion of the top silicon layer; and
forming at least one second device that at least partially overlies and is disposed upon the second insulator and the second portion of the top silicon layer.
7 Assignments
0 Petitions
Accused Products
Abstract
In one exemplary embodiment, a semiconductor structure includes: a semiconductor-on-insulator substrate with a top semiconductor layer overlying an insulation layer and the insulation layer overlies a bottom substrate layer; at least one first device at least partially overlying and disposed upon a first portion of the top semiconductor layer, where the first portion has a first thickness, a first width and a first depth; and at least one second device at least partially overlying and disposed upon a second portion of the top semiconductor layer, where the second portion has a second thickness, a second width and a second depth, where at least one of the following holds: the first thickness is greater than the second thickness, the first width is greater than the second width and the first depth is greater than the second depth.
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Citations
18 Claims
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1. A method comprising:
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providing a semiconductor-on-insulator substrate comprised of a top semiconductor layer overlying an insulation layer, where the insulation layer overlies a bottom silicon layer, where the top semiconductor layer has a first thickness, a first width and a first depth, where the top semiconductor layer comprises a first portion and a second portion; removing part of the second portion of the top semiconductor layer to achieve at least one of a second width that is less than the first width, and a second depth that is less than the first depth, where the removed part of the second portion is less than an entirety of the second portion; disposing a first insulator on the first portion of the top semiconductor layer and a second insulator on the second portion of the top semiconductor layer, where a total thickness of the first portion substantially equals a total thickness of the second portion; forming at least one first device that at least partially overlies and is disposed upon the first insulator and the first portion of the top silicon layer; and forming at least one second device that at least partially overlies and is disposed upon the second insulator and the second portion of the top silicon layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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providing an extremely thin semiconductor-on-insulator substrate; disposing a first insulator on a first portion of the substrate and a second insulator on a second portion of the substrate, where a total thickness of the first portion substantially equals a total thickness of the second portion; forming at least one first device that at least partially overlies the substrate and is disposed on the first insulator and the first portion of the substrate, where the at least one first device comprises a first transistor with a first spacer having a first spacer thickness; forming at least one second device that at least partially overlies the substrate and is disposed on the second insulator and the second portion of the substrate, where the at least one second device comprises a second transistor with a second spacer having a second spacer thickness; and thinning the second spacer to reduce the second spacer thickness such that the first spacer thickness is greater than the second spacer thickness, where the first spacer thickness is about 7.5 nm and the thinned second spacer thickness is about 6 nm. - View Dependent Claims (10, 11, 12)
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13. A method comprising:
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providing a semiconductor-on-insulator substrate comprised of a top semiconductor layer overlying an insulation layer, where the insulation layer overlies a bottom silicon layer, where the top semiconductor layer has a first thickness, a first width and a first depth, where the top semiconductor layer comprises a first portion and a second portion; removing part of the second portion of the top semiconductor layer to achieve a second thickness that is less than the first thickness, where the removed part of the second portion is less than an entirety of the second portion; disposing a first insulator on the first portion of the top semiconductor layer and a second insulator on the second portion of the top semiconductor layer, where a total thickness of the first portion substantially equals a total thickness of the second portion; forming at least one first device that at least partially overlies and is disposed upon the first insulator and the first portion of the top silicon layer; and forming at least one second device that at least partially overlies and is disposed upon the second insulator and the second portion of the top silicon layer. - View Dependent Claims (14, 15, 16, 17)
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18. A method comprising:
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providing a semiconductor-on-insulator substrate comprised of a top semiconductor layer overlying an insulation layer, where the insulation layer overlies a bottom silicon layer, where the top semiconductor layer has a first thickness, a first width and a first depth, where the top semiconductor layer comprises a first portion and a second portion; removing part of the second portion of the top semiconductor layer to achieve;
a second thickness that is less than the first thickness, a second width that is less than the first width, and a second depth that is less than the first depth, where the removed part of the second portion is less than an entirety of the second portion;disposing a first insulator on the first portion of the top semiconductor layer and a second insulator on the second portion of the top semiconductor layer, where a total thickness of the first portion substantially equals a total thickness of the second portion; forming at least one first device that at least partially overlies and is disposed upon the first insulator and the first portion of the top silicon layer; and forming at least one second device that at least partially overlies and is disposed upon the second insulator and the second portion of the top silicon layer.
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Specification