Low selectivity deposition methods
A deposition method includes forming a nucleation layer over a substrate, forming a layer of a first substance at least one monolayer thick chemisorbed on the nucleation layer, and forming a layer of a second substance at least one monolayer thick chemisorbed on the first substance. The chemisorption product of the first and second substance may include silicon and nitrogen. The nucleation layer may comprise silicon nitride. Further, a deposition method may include forming a first part of a nucleation layer on a first surface of a substrate and forming a second part of a nucleation layer on a second surface of the substrate. A deposition layer may be formed on the first and second parts of the nucleation layer substantially non-selectively on the first part of the nucleation layer compared to the second part. The first surface may be a surface of a borophosphosilicate glass layer. The second surface may be a surface of a rugged polysilicon layer. The first and second part of the nucleation layer may be formed simultaneously.
1. A low selectivity deposition method comprising:
forming a nucleation layer comprising silicon and nitrogen substantially non-selectively on a first and a second surface of a substrate by non-selective chemical vapor deposition;
forming a monolayer of a first substance chemisorbed on the nucleation layer; and
forming a monolayer of a second substance chemisorbed on the first substance, wherein a chemisorption product of the first and second substances comprises silicon nitride.
2. The deposition method of claim 1 wherein the nucleation layer comprises silicon nitride and a nucleation layer part that is over the first surface further comprises oxygen.
3. The deposition method of claim 1 wherein a thickness of the nucleation layer comprises less than about 20 Angstroms.
4. The deposition method of claim 1 wherein a thickness of a nucleation layer part that is over the first surface is greater than 50% of a thickness of a nucleation layer part that is over the second surface.
5. The deposition method of claim 1 wherein the first surface of the substrate exhibits a property of chemisorbing the first substance at a slower rate compared to the second surface.
6. The deposition method of claim 1 wherein the first surface comprises an insulative oxide and the second surface comprises a semiconductive material.
7. The deposition method of claim 1 wherein a thickness of a nucleation layer part that is over the first surface is greater than 80% of a thickness of a nucleation layer part that is over the second surface.
8. The deposition method of claim 1 wherein a thickness of the nucleation layer comprises less than about 6 Angstroms.
9. A low selectivity deposition method comprising:
forming a nucleation layer comprising silicon nitride substantially non-selectively on a first and a second surface of a substrate, a nucleation layer part that is over the first surface further comprising oxygen;
forming a monolayer of a first substance chemisorbed on the nucleation layer; and
forming a monolayer of a second substance chemisorbed on the first substance, wherein a chemisorption product of the first and second substances comprises silicon nitride.
10. The deposition method of claim 9 wherein a thickness of the nucleation layer comprises less than about 20 Angstroms.
11. The deposition method of claim 9 wherein a thickness of a nucleation layer part that is over the first surface is greater than 50% of a thickness of a nucleation layer part that is over the second surface.
12. The deposition method of claim 9 wherein the first surface of the substrate exhibits a property of chemisorbing the first substance at a slower rate compared to the second surface.
13. The deposition method of claim 9 wherein a thickness of the nucleation layer comprises less than about 6 Angstroms.
14. The deposition method of claim 9 wherein forming the nucleation layer comprises non-selective atomic layer deposition.
15. The deposition method of claim 9 wherein a thickness of a nucleation layer part that is over the first surface is greater than 80% of a thickness of a nucleation layer part that is over the second surface.
16. The deposition method of claim 9 wherein the first surface comprises an insulative oxide and the second surface comprises a semiconductive material.