Stress memorization process improvement for improved technology performance
First Claim
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1. A method of fabricating a semiconductor structure, comprising:
- providing a semiconductor substrate;
forming a gate structure on the semiconductor substrate by forming a polycrystalline gate material in direct contact with the semiconductor substrate;
forming a source-drain implant region adjacent to the gate structure and in direct contact with both the polycrystalline gate material and the semiconductor substrate;
forming a compressive stress-transmitting dielectric layer on the source-drain implant region and the gate structure and permanently deforming an underlying channel region located between the source and drain regions and below the polycrystalline gate material by elongating the channel region perpendicular to the semiconductor substrate;
removing the stress-transmitting dielectric layer; and
performing an annealing step after the removing of the stress-transmitting dielectric layer.
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Abstract
Semiconductor substrate with a deformed gate region and a method for the fabrication thereof. The semiconductor substrate has improved device performance compared to devices without a deformed gate region and decreased dopant loss compared to devices with deformed source/drain regions.
22 Citations
16 Claims
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1. A method of fabricating a semiconductor structure, comprising:
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providing a semiconductor substrate; forming a gate structure on the semiconductor substrate by forming a polycrystalline gate material in direct contact with the semiconductor substrate; forming a source-drain implant region adjacent to the gate structure and in direct contact with both the polycrystalline gate material and the semiconductor substrate; forming a compressive stress-transmitting dielectric layer on the source-drain implant region and the gate structure and permanently deforming an underlying channel region located between the source and drain regions and below the polycrystalline gate material by elongating the channel region perpendicular to the semiconductor substrate; removing the stress-transmitting dielectric layer; and performing an annealing step after the removing of the stress-transmitting dielectric layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification