Hybrid fin field-effect transistor structures and related methods
First Claim
Patent Images
1. A structure comprising:
- a substrate having an insulator layer disposed thereon; and
a fin field-effect transistor disposed over the substrate, the fin field-effect transistor including;
a source region and a drain region disposed in contact with the insulator layer;
at least one fin extending between the source and the drain regions and comprising a bilayer;
a gate disposed above the bilayer, extending over the at least one fin and between the source and the drain regions; and
a gate dielectric layer disposed between the gate and the fin,wherein the bilayer comprises a second semiconductor material disposed over a first semiconductor material, and the first semiconductor material is different from the second semiconductor material, and a sidewall surface of the at least one fin includes the first semiconductor material.
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Abstract
Semiconductor-on-insulator structures facilitate the fabrication of devices, including MOSFETs that are at least partially depleted during operation and FinFETs including bilayer fins and/or crystalline oxide.
615 Citations
15 Claims
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1. A structure comprising:
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a substrate having an insulator layer disposed thereon; and a fin field-effect transistor disposed over the substrate, the fin field-effect transistor including; a source region and a drain region disposed in contact with the insulator layer; at least one fin extending between the source and the drain regions and comprising a bilayer; a gate disposed above the bilayer, extending over the at least one fin and between the source and the drain regions; and a gate dielectric layer disposed between the gate and the fin, wherein the bilayer comprises a second semiconductor material disposed over a first semiconductor material, and the first semiconductor material is different from the second semiconductor material, and a sidewall surface of the at least one fin includes the first semiconductor material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A structure comprising:
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a substrate; a first crystalline insulator layer disposed over at least a first portion of the substrate; a second crystalline insulator layer disposed over at least a second portion of the substrate; a first fin field-effect transistor disposed over the substrate, the first fin field-effect-transistor including; a first source region and a first drain region disposed over and in contact with the first crystalline insulator layer; a first fin extending between the first source and the first drain regions, the first fin comprising a first semiconductor material disposed on at least one vertically oriented sidewall of the first fin; a first gate, disposed above the substrate, extending over the first fin and between the first source and the first drain regions; a first gate dielectric layer disposed between the first gate and the first fin; and a second fin field-effect transistor disposed over the substrate, the second fin field-effect-transistor including; a second source region and a second drain region disposed over and in contact with the second crystalline insulator layer; a second fin extending between the second source and the second drain regions and comprising a second semiconductor material disposed on at least one vertically oriented sidewall of the second fin; a second gate, disposed above the substrate, extending over the second fin and between the second source and the second drain regions; and a second gate dielectric layer disposed between the second gate and the second fin, wherein the first semiconductor material has a first crystalline orientation, the second semiconductor material has a second crystalline orientation, and the first and second crystalline orientations are different. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A structure comprising:
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a substrate; a crystalline insulator material disposed over the substrate; a first fin field-effect transistor disposed over the substrate; and a second fin field-effect transistor disposed over the substrate, at least one of the first fin field-effect transistor or the second field-effect transistor being disposed over the crystalline insulator material; wherein the first fin field-effect transistor comprises a first semiconductor material has a first crystalline orientation, the second fin field-effect transistor comprises a second semiconductor material has a second crystalline orientation, and the first and second crystalline orientations are different.
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Specification