Plasma-enhanced cyclic layer deposition process for barrier layers
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01L-021/4763
H01L-021/02
H01L-021/44
출원번호
US-0458852
(2006-07-20)
등록번호
US-7473638
(2009-01-06)
발명자
/ 주소
Yang,Michael X.
Itoh,Toshio
Xi,Ming
출원인 / 주소
Applied Materials, Inc.
대리인 / 주소
Patterson & Sheridan, LLP
인용정보
피인용 횟수 :
12인용 특허 :
255
초록▼
In one embodiment, a method for forming a metal-containing material on a substrate is provided which includes forming a metal containing barrier layer on a substrate by a plasma-enhanced cyclical vapor deposition process, exposing the substrate to a soak process, and depositing a conductive material
In one embodiment, a method for forming a metal-containing material on a substrate is provided which includes forming a metal containing barrier layer on a substrate by a plasma-enhanced cyclical vapor deposition process, exposing the substrate to a soak process, and depositing a conductive material on the substrate by a second vapor deposition process. The substrate may be exposed to a silicon-containing compound (e.g., silane) during the soak process. In some examples, a metallic nitride layer may be deposited subsequent to the soak process and prior to the second vapor deposition process. In other examples, the metal containing barrier layer contains metallic titanium, the metallic nitride layer contains titanium nitride, and the conductive material contains tungsten or copper. The plasma-enhanced cyclical vapor deposition process may further include exposing the substrate to a nitrogen precursor, such as nitrogen, hydrogen, a nitrogen/hydrogen mixture, ammonia, hydrazine, or derivatives thereof.
대표청구항▼
The invention claimed is: 1. A method for forming a metal-containing material on a substrate, comprising: forming a titanium-containing layer on a substrate by a plasma-enhanced cyclical vapor deposition process; exposing the substrate to a silicon-containing compound during a soak process; and dep
The invention claimed is: 1. A method for forming a metal-containing material on a substrate, comprising: forming a titanium-containing layer on a substrate by a plasma-enhanced cyclical vapor deposition process; exposing the substrate to a silicon-containing compound during a soak process; and depositing a conductive material comprising copper on the substrate by a second vapor deposition process. 2. The method of claim 1, wherein a metal nitride layer comprising titanium is deposited subsequent to the soak process and prior to the second vapor deposition process. 3. The method of claim 1, wherein the silicon-containing compound is selected from the group consisting of silane, disilane, chlorosilane, dichlorosilane, trichlorosilane, tetrachlorosilane, hexachlorodisilane, derivatives thereof, and combinations thereof. 4. The method of claim 3, wherein the silicon-containing compound is silane. 5. The method of claim 1, wherein the titanium-containing layer comprises titanium nitride. 6. The method of claim 1, wherein the titanium-containing layer comprises titanium nitride formed by exposing the substrate to a nitrogen precursor during the plasma-enhanced cyclical vapor deposition process. 7. The method of claim 6, wherein the nitrogen precursor comprises a gas selected from the group consisting of nitrogen, hydrogen, a nitrogen/hydrogen mixture, ammonia, hydrazine, hydrazine compounds, derivatives thereof, and combinations thereof. 8. The method of claim 6, wherein the nitrogen precursor comprises ammonia. 9. The method of claim 6, wherein the nitrogen precursor comprises a nitrogen plasma. 10. A method for forming a metal-containing material on a substrate, comprising: forming a metal-containing barrier layer on a substrate by a plasma-enhanced cyclical vapor deposition process; exposing the substrate to a silicon-containing compound during a soak process to form a pretreated surface on the metal-containing barrier layer; and depositing a tungsten material on the substrate by a vapor deposition process. 11. The method of claim 10, wherein a metal nitride layer is deposited on the pretreated surface prior to depositing the tungsten material. 12. The method of claim 10, wherein the tungsten material is deposited by a cyclic layer deposition process. 13. The method of claim 10, wherein the tungsten material is deposited by a plasma-enhanced cyclic layer deposition process. 14. The method of claim 10, wherein the silicon-containing compound is selected from the group consisting of silane, disilane, chlorosilane, dichlorosilane, trichlorosilane, tetrachlorosilane, hexachlorodisilane, derivatives thereof, and combinations thereof. 15. The method of claim 14, wherein the silicon-containing compound is silane and the metal-containing barrier layer comprises titanium. 16. A method for forming a metal-containing material on a substrate, comprising: forming a metal-containing barrier layer on a substrate by a plasma-enhanced cyclical vapor deposition process, wherein the metal-containing barrier layer comprises titanium nitride formed by exposing the substrate to a nitrogen precursor during the plasma-enhanced cyclical vapor deposition process; exposing the substrate to a silicon precursor during a soak process to form a pretreated surface on the metal-containing barrier layer; and depositing a tungsten material on the substrate by a vapor deposition process. 17. The method of claim 16, wherein the nitrogen precursor comprises a gas selected from the group consisting of nitrogen, hydrogen, a nitrogen/hydrogen mixture, ammonia, hydrazine, hydrazine compounds, derivatives thereof, and combinations thereof. 18. The method of claim 17, wherein the nitrogen precursor comprises ammonia or nitrogen. 19. A method for forming a metal-containing material on a substrate, comprising: forming a metal-containing barrier layer on a substrate by a plasma-enhanced cyclical vapor deposition process; exposing the substrate to a soak process to form a pretreated surface on the metal-containing barrier layer; depositing a metal nitride layer on the pretreated surface; and depositing a copper material on the metal nitride layer by a vapor deposition process. 20. The method of claim 19, wherein the copper material is deposited by a plasma-enhanced vapor deposition process. 21. A method for forming a metal-containing material on a substrate, comprising: forming a metal-containing barrier layer on a substrate by a plasma-enhanced cyclical vapor deposition process; exposing the substrate to a silicon-containing compound during the soak process to form a pretreated surface on the metal-containing barrier layer; and depositing a material comprising copper on the substrate by a vapor deposition process. 22. The method of claim 21, wherein the silicon-containing compound is selected from the group consisting of silane, disilane, chlorosilane, dichlorosilane trichlorosilane, tetrachlorosilane, hexachlorodisilane, derivatives thereof, and combinations thereof. 23. The method of claim 22, wherein the silicon-containing compound is silane and the metal-containing barrier layer comprises titanium. 24. A method for forming a metal-containing material on a substrate, comprising: forming a metal-containing barrier layer on a substrate by a plasma-enhanced cyclical vapor deposition process, wherein the metal-containing barrier layer comprises titanium nitride formed by exposing the substrate to a nitrogen precursor during the plasma-enhanced cyclical vapor deposition process; exposing the substrate to a soak process to form a pretreated surface on the metal-containing barrier layer; and depositing a material comprising copper on the substrate by a vapor deposition process. 25. The method of claim 24, wherein the nitrogen precursor comprises a gas selected from the group consisting of nitrogen, hydrogen, a nitrogen/hydrogen mixture, ammonia, hydrazine, hydrazine compounds, derivatives thereof, and combinations thereof. 26. The method of claim 25, wherein the nitrogen precursor comprises ammonia or nitrogen. 27. A method for forming a metal-containing material on a substrate, comprising: forming a metal-containing barrier layer on a substrate by a plasma-enhanced cyclical vapor deposition process by sequentially exposing the substrate to a metal-containing precursor and a nitrogen precursor; exposing the substrate to a soak process to form a pretreated surface on the metal-containing barrier layer; and depositing a conductive material on the substrate by a vapor deposition process. 28. The method of claim 27, wherein the nitrogen precursor comprises a gas selected from the group consisting of nitrogen, hydrogen, a nitrogen/hydrogen mixture, ammonia, hydrazine, hydrazine compounds, derivatives thereof, and combinations thereof. 29. The method of claim 28, wherein the nitrogen precursor comprises ammonia or nitrogen, and the conductive material comprises tungsten or copper. 30. The method of claim 29, wherein the substrate is exposed to a silane during the soak process. 31. A method for forming a metal-containing material on a substrate, comprising: forming a metal-containing barrier layer on a substrate by a plasma-enhanced cyclical vapor deposition process by sequentially exposing the substrate to a metal-containing precursor and a nitrogen precursor, wherein the metal-containing precursor comprises methylamido or ethylamido ligands, and the nitrogen precursor comprises a gas selected from the group consisting of nitrogen, hydrogen, a nitrogen/hydrogen mixture, ammonia, hydrazine, hydrazine compounds, derivatives thereof, and combinations thereof; exposing the substrate to a soak process to form a pretreated surface on the substrate; and depositing a conductive material on the substrate by a vapor deposition process, wherein the conductive material comprises tungsten or copper. 32. The method of claim 31, wherein the metal-containing precursor comprises tetrakis(dimethylamido) titanium, tetrakis(diethylamido) titanium, or derivatives thereof. 33. The method of claim 31, wherein the nitrogen precursor comprises ammonia or nitrogen plasma, and the conductive material comprises copper. 34. The method of claim 31, wherein the substrate is exposed to a silicon-containing compound during the soak process. 35. The method of claim 34, wherein the silicon-containing compound is selected from the group consisting of silane, disilane, chiorosilane, dichlorosilane, trichlorosilane, tetrachiorosilane, hexachiorodisilane, derivatives thereof, and combinations thereof. 36. The method of claim 35, wherein the nitrogen precursor comprises ammonia or nitrogen plasma, and the silicon-containing compound comprises silane.
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