REDUCING EXTERNAL RESISTANCE OF A MULTI-GATE DEVICE BY SILICIDATION
First Claim
1. An apparatus comprising:
- a semiconductor substrate;
a multi-gate fin coupled with the semiconductor substrate, the multi-gate fin comprising a first surface, a second surface, and a third surface, the multi-gate fin further comprising a gate region, a source region, and a drain region, the gate region being disposed between the source and drain regions wherein the source and drain regions of the multi-gate fin are fully or substantially silicized with a metal silicide; and
a spacer dielectric material coupled to the first surface and the second surface wherein the spacer dielectric material substantially covers the first surface and the second surface in the source and drain regions.
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Abstract
Reducing external resistance of a multi-gate device by silicidation is generally described. In one example, an apparatus includes a semiconductor substrate, a multi-gate fin coupled with the semiconductor substrate, the multi-gate fin having a first surface, a second surface, and a third surface, the multi-gate fin also having a gate region, a source region, and a drain region, the gate region being disposed between the source and drain regions wherein the source and drain regions of the multi-gate fin are fully or substantially silicized with a metal silicide, and a spacer dielectric material coupled to the first surface and the second surface wherein the spacer dielectric material substantially covers the first surface and the second surface in the source and drain regions.
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Citations
15 Claims
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1. An apparatus comprising:
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a semiconductor substrate; a multi-gate fin coupled with the semiconductor substrate, the multi-gate fin comprising a first surface, a second surface, and a third surface, the multi-gate fin further comprising a gate region, a source region, and a drain region, the gate region being disposed between the source and drain regions wherein the source and drain regions of the multi-gate fin are fully or substantially silicized with a metal silicide; and a spacer dielectric material coupled to the first surface and the second surface wherein the spacer dielectric material substantially covers the first surface and the second surface in the source and drain regions. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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forming at least one multi-gate fin on a semiconductor substrate, the multi-gate fin comprising a first surface, a second surface, and a third surface, the multi-gate fin further comprising a gate region, a source region, and a drain region, the gate region being disposed between the source and drain regions; depositing a spacer dielectric material to substantially cover the first surface and the second surface in the source and drain regions; depositing epitaxial growth to the third surface in the source and drain regions; depositing a metal to the epitaxial growth; and thermally processing the metal to at least substantially silicidize the epitaxial growth and the multi-gate fin. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification