Treatment to control deposition rate
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsWan-Yi Kao, Kuang-Yuan Hsu
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Abstract
A treatment, structure and system are provided that modify the deposition process of a material that can occur over two differing materials. In an embodiment the deposition rates may be adjusted by the treatment to change the deposition rate of one of the materials to be more in line with the deposition rate of a second one of the materials. Also, the deposition rates may be modified to be different from each other, to allow for a more selective deposition over the first one of the materials than over the second one of the materials.
Claims20
A method of manufacturing a semiconductor device, the method comprising:
- depositing a mask over a semiconductor substrate;
- using the mask to form a fin from the semiconductor substrate, the fin comprising a first sidewall;
- after the using the mask to form the fin, treating exposed surfaces to reduce an atomic deposition growth rate difference of a dielectric material between the mask and the fin, wherein the treating exposed surfaces is performed at a pressure of between about 1 mtorr and about 5 mtorr;
- and
- depositing the dielectric material on the first sidewall and the mask using an atomic layer deposition process.
A method of manufacturing a semiconductor device, the method comprising:
- providing a fin over a substrate, the fin comprising:
- a first semiconductor fin;
- a first mask over the first semiconductor fin;
- a second mask over the first mask, the second mask being a different material than the first mask;
- treating each of the first semiconductor fin, the first mask, and the second mask to minimize differences in atomic layer deposition rates of a first dielectric material, wherein the treating forms SiNF2;
- and
- after the treating, depositing the first dielectric material using an atomic layer deposition process.
A method of manufacturing a semiconductor device, the method comprising:
- depositing silicon nitride onto a semiconductor substrate;
- patterning the silicon nitride and the semiconductor substrate to form a fin, the fin comprising both silicon nitride and silicon;
- adding nitrogen to the silicon without significantly reacting with the silicon nitride to reduce an atomic deposition growth rate to below 1 Å/cycle, wherein after the adding nitrogen the fin has terminal groups which are the same across the silicon nitride and the silicon;
- and
- reacting a precursor with the terminal groups to deposit a dielectric material on both the silicon nitride and the silicon.
Dependencies are inferred from the claim text.