Plasma source and methods for depositing thin film coatings using plasma enhanced chemical vapor deposition
View Patent ↗The present invention provides novel plasma sources useful in the thin film coating arts and methods of using the same. More specifically, the present invention provides novel linear and two dimensional plasma sources that produce linear and two dimensional plasmas, respectively, that are useful for plasma-enhanced chemical vapor deposition. The present invention also provides methods of making thin film coatings and methods of increasing the coating efficiencies of such methods.
1. A method of forming a coating using plasma enhanced chemical vapor deposition (PECVD), comprising:
a) providing a plasma that is linear that is made substantially uniform over its length in the substantial absence of Hall current;
b) providing precursor and reactant gases proximate to the plasma;
c) providing a substrate with at least one surface to be coated proximate the plasma;
d) energizing, partially decomposing, or fully decomposing the precursor gas; and
e) depositing the coating on the at least one surface of the substrate using PECVD;
wherein the depositing includes bonding or condensing a chemical fragment of the precursor gas containing a desired chemical element for coating on the at least one surface of the substrate.
2. The method of claim 1 , wherein the coating is deposited at a rate of deposition of at least 0.2 μm/second.
3. The method of claim 2 , wherein the coating is deposited at a rate of deposition of at least 0.3 μm/second.
4. The method of claim 3 , wherein the coating is deposited at a rate of deposition of at least 0.5 μm/second.
5. The method of claim 1 , further comprising:
providing at least one magnetic field which is proximate to the plasma;
wherein the at least one magnetic field is positioned to bend and/or densify the plasma.
6. The method of claim 5 , wherein the plasma that is linear is at least 0.5 meters in length.
7. The method of claim 1 , wherein the plasma that is linear is at least 0.5 meters in length.
8. A method of forming a coating using plasma enhanced chemical vapor deposition (PECVD), comprising:
a) providing a plasma that is two dimensional and is made substantially uniform in two dimensions in the substantial absence of Hall current;
b) providing precursor and reactant gases proximate to the plasma;
c) providing a substrate with at least one surface to be coated proximate the plasma;
d) energizing, partially decomposing, or fully decomposing the precursor gas; and
e) depositing the coating on the at least one surface of the substrate using PECVD;
wherein the depositing includes bonding or condensing a chemical fragment of the precursor gas containing a desired chemical element for coating on the at least one surface of the substrate.
9. The method of claim 8 , wherein the coating is deposited at a rate of deposition of at least 0.2 μm/second.
10. The method of claim 9 , wherein the coating is deposited at a rate of deposition of at least 0.3 μm/second.
11. The method of claim 10 , wherein the coating is deposited at a rate of deposition of at least 0.5 μm/second.
12. The method of claim 8 , wherein the plasma that is two dimensional is at least 0.5 meters in length.
13. A method of forming a coating using plasma enhanced chemical vapor deposition (PECVD), comprising:
a) providing a plasma that is linear that is made substantially uniform over its length in the substantial absence of Hall current;
b) providing precursor and reactant gases proximate to the plasma;
c) providing a substrate with at least one surface to be coated proximate the plasma;
d) energizing, partially decomposing, or fully decomposing the precursor gas; and
e) depositing the coating on the at least one surface of the substrate using PECVD;
wherein the energizing, partially decomposing, or fully decomposing the precursor gas forms condensable molecular entities which adhere to the at least one surface of the substrate.
14. The method of claim 13 , wherein the coating is deposited at a rate of deposition of at least 0.2 μm/second.
15. The method of claim 14 , wherein the coating is deposited at a rate of deposition of at least 0.3 μm/second.
16. The method of claim 15 , wherein the coating is deposited at a rate of deposition of at least 0.5 μm/second.
17. The method of claim 13 , further comprising:
providing at least one magnetic field which is proximate to the plasma;
wherein the at least one magnetic field is positioned to bend and/or densify the plasma.
18. The method of claim 17 , wherein the plasma that is linear is at least 0.5 meters in length.
19. The method of claim 13 , wherein the plasma that is linear is at least 0.5 meters in length.
20. A method of forming a coating using plasma enhanced chemical vapor deposition (PECVD), comprising:
a) providing a plasma that is two dimensional and is made substantially uniform in two dimensions in the substantial absence of Hall current;
b) providing precursor and reactant gases proximate to the plasma;
c) providing a substrate with at least one surface to be coated proximate the plasma;
d) energizing, partially decomposing, or fully decomposing the precursor gas; and
e) depositing the coating on the at least one surface of the substrate using PECVD;
wherein the energizing, partially decomposing, or fully decomposing the precursor gas forms condensable molecular entities which adhere to the at least one surface of the substrate.
21. The method of claim 20 , wherein the coating is deposited at a rate of deposition of at least 0.2 μm/second.
22. The method of claim 21 , wherein the coating is deposited at a rate of deposition of at least 0.3 μm/second.
23. The method of claim 22 , wherein the coating is deposited at a rate of deposition of at least 0.5 μm/second.
24. The method of claim 20 , wherein the plasma that is two dimensional is at least 0.5 meters in length.