System and method of vapor deposition
View Patent ↗Provided is a method and system for vapor deposition of a coating material onto a semiconductor substrate. In an embodiment, photoresist is deposited. An in-situ baking process may be performed with the vapor deposition. In an embodiment, a ratio of chemical components of a material to be deposited onto the substrate is changed during the deposition. Therefore, a layer having a gradient chemical component distribution may be provided. In an embodiment, a BARC layer may be provided which includes a gradient chemical component distribution providing an n,k distribution through the layer. Other materials that may be vapor deposited include pattern freezing material.
1. A method of fabrication of a semiconductor device, comprising:
providing a substrate;
vapor depositing a photoresist material onto the substrate; and
heating the substrate in-situ and concurrently with the vapor deposition of the photoresist.
2. The method of claim 1 , further comprising:
providing a vacuum during the vapor deposition of the photoresist;
wherein the photoresist includes a solvent that is removed by the vacuum.
3. The method of claim 1 , wherein the photoresist includes a chemical component selected from the group consisting of PAG (photo acid generator), quencher, surfactant, polymer resin, surface segregated additive, crosslinker, chromophore, solvent, and combinations thereof.
4. The method of claim 1 , wherein the photoresist includes a first chemical component and a second chemical component, wherein a ratio of the first and second chemical components of the photoresist is changed during the vapor deposition of the photoresist.
5. The method of claim 1 , wherein vapor depositing the photoresist forms a layer of photoresist including at least one chemical component gradient from the top surface of the photoresist layer to the bottom surface of the photoresist layer.
6. The method of claim 1 , further comprising:
providing a first chemical component;
providing a second chemical component;
mixing the first chemical component and the second chemical component at a first ratio to form the photoresist.
7. The method of claim 1 , further comprising:
forming a layer of photoresist using the vapor deposited photoresist, wherein the layer of photoresist includes a chemical gradient of acid producing components; and
patterning the layer of photoresist to provide a tapered profile feature.
8. The method of claim 1 , wherein the vapor depositing the photoresist includes providing a vapor to the substrate using a plurality of nozzles.
9. The method of claim 1 , further comprising:
vapor depositing a pattern freezing material.
10. A method of fabricating a semiconductor device, comprising:
providing a substrate;
providing a first coating material including a first chemical component and a second chemical component at a first ratio;
vapor depositing the first coating material onto the substrate;
modifying an amount of the first chemical component provided to form a second coating material having a second ratio of the first chemical component and the second chemical component; and
vapor depositing the second coating material onto the substrate.
11. The method of claim 10 , further comprising:
performing an in-situ baking process during the vapor depositing the first coating material.
12. The method of claim 10 , wherein the first coating material and the second coating material are selected from the group consisting of photoresist, BARC, top coat, adhesion layers, crosslinking materials, organic or inorganic etching stop layers, Si, Si 3 N 4 , SiON, Ti, TiN, Ta, TaN, or silicon oxide, and combinations thereof.
13. The method of claim 10 , wherein the first coating material and the second coating material each include a photoresist, wherein the first chemical component includes at least one of a polymer, an acid labile molecule, a PAG component, a Quencher component, a chromophore, a crosslinker, and a solvent.
14. The method of claim 10 , wherein the first coating material and the second coating material include an antireflective coating material.
15. The method of claim 10 , wherein the first coating material and the second coating material provide different reflectivities.
16. The method of claim 10 , wherein the vapor depositing the first coating material and the second coating material provides a bottom anti-reflective layer (BARC) having an n,k gradient.
17. A method, comprising:
providing a semiconductor substrate;
providing a first chemical component;
providing a second chemical component;
mixing the first chemical component and the second chemical component at a first ratio to form a photoresist material;
vapor depositing the photoresist material onto the semiconductor substrate; and
heating the semiconductor substrate in-situ with the vapor deposition of the photoresist material.
18. The method of claim 17 , wherein a ratio of the first and second chemical components of the photoresist is changed during the vapor depositing of the photoresist material.
19. The method of claim 17 , wherein vapor depositing the photoresist material forms a layer of photoresist on the semiconductor substrate including at least one chemical component gradient from the top surface of the photoresist layer to the bottom surface of the photoresist layer.