Process for production of SOI substrate and process for production of semiconductor device
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01L-021/84
H01L-021/00
출원번호
US-0705994
(2010-02-16)
등록번호
US-8642405
(2014-02-04)
우선권정보
JP-10-214125 (1998-07-29)
발명자
/ 주소
Fukunaga, Takeshi
출원인 / 주소
Semiconductor Energy Laboratory Co., Ltd.
대리인 / 주소
Nixon Peabody LLP
인용정보
피인용 횟수 :
1인용 특허 :
183
초록▼
A process for producing an adhered SOI substrate without causing cracking and peeling of a single-crystal silicon thin film. The process consists of selectively forming a porous silicon layer in a single-crystal semiconductor substrate, adding hydrogen into the single-crystal semiconductor substrate
A process for producing an adhered SOI substrate without causing cracking and peeling of a single-crystal silicon thin film. The process consists of selectively forming a porous silicon layer in a single-crystal semiconductor substrate, adding hydrogen into the single-crystal semiconductor substrate to form a hydrogen-added layer, adhering the single-crystal semiconductor substrate to a supporting substrate, separating the single-crystal semiconductor substrate at the hydrogen-added layer by thermal annealing, performing thermal annealing again to stabilize the adhering interface, and selectively removing the porous silicon layer to give single-crystal silicon layer divided into islands.
대표청구항▼
1. A method of manufacturing a semiconductor device, said method comprising the steps of: forming a first silicon oxide film on a first single crystal semiconductor substrate, the first single crystal semiconductor substrate comprising silicon;adding hydrogen to the first single crystal semiconducto
1. A method of manufacturing a semiconductor device, said method comprising the steps of: forming a first silicon oxide film on a first single crystal semiconductor substrate, the first single crystal semiconductor substrate comprising silicon;adding hydrogen to the first single crystal semiconductor substrate through the first silicon oxide film to form a hydrogen added layer in the first single crystal semiconductor substrate;bonding the first single crystal semiconductor substrate to a second substrate with the first silicon oxide film disposed between the first single crystal semiconductor substrate and the second substrate;separating the first single crystal semiconductor substrate at the hydrogen added layer by a heat treatment so that a semiconductor layer is formed over the second substrate;forming a single crystal semiconductor island by etching a portion of the semiconductor layer;heating the single crystal semiconductor island at a temperature within a range of 900 to 1200° C.;forming a gate electrode over the single crystal semiconductor island;forming a metal silicide layer on the gate electrode; andforming an interlayer insulating film over the metal silicide layer, the interlayer insulating film comprising silicon nitride,wherein the interlayer insulating film is in contact with an upper surface of the metal silicide layer. 2. The method according to claim 1, wherein the second substrate is a glass substrate. 3. The method according to claim 1, wherein the second substrate is a semiconductor substrate. 4. The method according to claim 1, further comprising a step of anodizing a portion of the first single crystal semiconductor substrate, wherein the portion of the first single crystal semiconductor substrate corresponds to the etched portion of the semiconductor layer in the step of forming the single crystal semiconductor island. 5. The method according to claim 1, wherein the step of heating the single crystal semiconductor island is performed in a reducing atmosphere. 6. The method according to claim 1, further comprising a step of flattening the semiconductor layer by chemical mechanical polishing. 7. The method according to claim 1, wherein the step of forming the first silicon oxide film on the first single crystal semiconductor substrate is performed by oxidation of a surface of the first single crystal semiconductor substrate. 8. A method of manufacturing a semiconductor device, said method comprising the steps of: forming a first silicon oxide film on a first single crystal semiconductor substrate, the first single crystal semiconductor substrate comprising silicon;adding hydrogen to the first single crystal semiconductor substrate through the first silicon oxide film to form a hydrogen added layer in the first single crystal semiconductor substrate;bonding the first single crystal semiconductor substrate to a second silicon oxide film formed on a second substrate with the first silicon oxide film disposed between the first single crystal semiconductor substrate and the second substrate;separating the first single crystal semiconductor substrate at the hydrogen added layer by a heat treatment so that a semiconductor layer is formed over the second substrate;forming a single crystal semiconductor island by etching a portion of the semiconductor layer;heating the single crystal semiconductor island at a temperature within a range of 900 to 1200° C.,forming a gate electrode over the single crystal semiconductor island;forming a metal silicide layer on the gate electrode; andforming an interlayer insulating film over the metal silicide layer, the interlayer insulating film comprising silicon nitride,wherein the interlayer insulating film is in contact with an upper surface of the metal silicide layer. 9. The method according to claim 8, wherein the second substrate is a glass substrate. 10. The method according to claim 8, wherein the second substrate is a semiconductor substrate. 11. The method according to claim 8, further comprising a step of anodizing a portion of the first single crystal semiconductor substrate, wherein the portion of the first single crystal semiconductor substrate corresponds to the etched portion of the semiconductor layer in the step of forming the single crystal semiconductor island. 12. The method according to claim 8, wherein the step of heating the single crystal semiconductor island is performed in a reducing atmosphere. 13. The method according to claim 8, further comprising a step of flattening the semiconductor layer by chemical mechanical polishing. 14. The method according to claim 8, wherein the step of forming the first silicon oxide film on the first single crystal semiconductor substrate is performed by oxidation of a surface of the first single crystal semiconductor substrate. 15. A method of manufacturing a semiconductor device, said method comprising the steps of: forming a first silicon oxide film on a first single crystal semiconductor substrate, the first single crystal semiconductor substrate comprising silicon;adding hydrogen to the first single crystal semiconductor substrate through the first silicon oxide film to form a hydrogen added layer in the first single crystal semiconductor substrate;bonding the first single crystal semiconductor substrate to a second silicon oxide film formed on a second substrate with the first silicon oxide film disposed between the first single crystal semiconductor substrate and the second substrate;separating the first single crystal semiconductor substrate at the hydrogen added layer by a heat treatment so that a semiconductor layer is formed over the second substrate;heating the semiconductor layer to stabilize an adhering interface between the first silicon oxide film and the second silicon oxide film;forming a single crystal semiconductor island by etching a portion of the semiconductor layer;heating the single crystal semiconductor island at a temperature within a range of 900 to 1200° C.,forming a gate electrode over the single crystal semiconductor island;forming a metal silicide layer on the gate electrode; andforming an interlayer insulating film over the metal silicide layer, the interlayer insulating film comprising silicon nitride,wherein the interlayer insulating film is in contact with an upper surface of the metal silicide layer. 16. The method according to claim 15, wherein the second substrate is a glass substrate. 17. The method according to claim 15, wherein the second substrate is a semiconductor substrate. 18. The method according to claim 15, further comprising a step of anodizing a portion of the first single crystal semiconductor substrate, wherein the portion of the first single crystal semiconductor substrate corresponds to the etched portion of the semiconductor layer in the step of forming the single crystal semiconductor island. 19. The method according to claim 15, wherein the step of heating the semiconductor layer is performed at a temperature within a range of 900 to 1200° C. 20. The method according to claim 15, wherein the step of heating the single crystal semiconductor island is performed in a reducing atmosphere. 21. The method according to claim 15, further comprising a step of flattening the semiconductor layer by chemical mechanical polishing. 22. The method according to claim 15, wherein the step of forming the first silicon oxide film on the first single crystal semiconductor substrate is performed by oxidation of a surface of the first single crystal semiconductor substrate. 23. A method of manufacturing a semiconductor device, said method comprising the steps of: forming a first silicon oxide film on a first single crystal semiconductor substrate, the first single crystal semiconductor substrate comprising silicon;adding hydrogen to the first single crystal semiconductor substrate through the first silicon oxide film to form a hydrogen added layer in the first single crystal semiconductor substrate;bonding the first single crystal semiconductor substrate to a second substrate with the first silicon oxide film disposed between the first single crystal semiconductor substrate and the second substrate;separating the first single crystal semiconductor substrate at the hydrogen added layer by a heat treatment so that a semiconductor layer is formed over the second substrate;forming a single crystal semiconductor island by etching a portion of the semiconductor layer;heating the single crystal semiconductor island at a temperature within a range of 900 to 1200° C.;forming a gate insulating film on the single crystal semiconductor island;forming a gate electrode comprising poly silicon over the single crystal semiconductor island with the gate insulating film interposed therebetween;forming a side wall comprising silicon nitride adjacent to a side surface of the gate electrode;forming a metal silicide layer on the gate electrode; andforming an interlayer insulating film over the metal silicide layer and the side wall, the interlayer insulating film comprising silicon nitride,wherein the interlayer insulating film is in contact with an upper surface of the metal silicide layer. 24. The method according to claim 23, wherein the second substrate is a glass substrate. 25. The method according to claim 23, wherein the second substrate is a semiconductor substrate. 26. The method according to claim 23, further comprising a step of anodizing a portion of the first single crystal semiconductor substrate, wherein the portion of the first single crystal semiconductor substrate corresponds to the etched portion of the semiconductor layer in the step of forming the single crystal semiconductor island. 27. The method according to claim 23, wherein the step of heating the single crystal semiconductor island is performed in a reducing atmosphere. 28. The method according to claim 23, further comprising a step of flattening the semiconductor layer by chemical mechanical polishing. 29. The method according to claim 23, wherein the step of forming the first silicon oxide film on the first single crystal semiconductor substrate is performed by oxidation of a surface of the first single crystal semiconductor substrate. 30. A method of manufacturing a semiconductor device, said method comprising the steps of: forming a first silicon oxide film on a first single crystal semiconductor substrate, the first single crystal semiconductor substrate comprising silicon;adding hydrogen to the first single crystal semiconductor substrate through the first silicon oxide film to form a hydrogen added layer in the first single crystal semiconductor substrate;bonding the first single crystal semiconductor substrate to a second silicon oxide film formed on a second substrate with the first silicon oxide film disposed between the first single crystal semiconductor substrate and the second substrate;separating the first single crystal semiconductor substrate at the hydrogen added layer by a heat treatment so that a semiconductor layer is formed over the second substrate;forming a single crystal semiconductor island by etching a portion of the semiconductor layer;heating the single crystal semiconductor island at a temperature within a range of 900 to 1200° C.;forming a gate insulating film on the single crystal semiconductor island;forming a gate electrode comprising polysilicon over the single crystal semiconductor island with the gate insulating film interposed therebetween;forming a side wall comprising silicon nitride adjacent to a side surface of the gate electrode with,forming a metal silicide layer on the gate electrode; andforming an interlayer insulating film over the metal silicide layer and the side wall, the interlayer insulating film comprising silicon nitride,wherein the interlayer insulating film is in contact with an upper surface of the metal silicide layer. 31. The method according to claim 30, wherein the second substrate is a glass substrate. 32. The method according to claim 30, wherein the second substrate is a semiconductor substrate. 33. The method according to claim 30, further comprising a step of anodizing a portion of the first single crystal semiconductor substrate, wherein the portion of the first single crystal semiconductor substrate corresponds to the etched portion of the semiconductor layer in the step of forming the single crystal semiconductor island. 34. The method according to claim 30, wherein the step of heating the single crystal semiconductor island is performed in a reducing atmosphere. 35. The method according to claim 30, further comprising a step of flattening the semiconductor layer by chemical mechanical polishing. 36. The method according to claim 30, wherein the step of forming the first silicon oxide film on the first single crystal semiconductor substrate is performed by oxidation of a surface of the first single crystal semiconductor substrate. 37. A method of manufacturing a semiconductor device, said method comprising the steps of: forming a first silicon oxide film on a first single crystal semiconductor substrate, the first single crystal semiconductor substrate comprising silicon;adding hydrogen to the first single crystal semiconductor substrate through the first silicon oxide film to form a hydrogen added layer in the first single crystal semiconductor substrate;bonding the first single crystal semiconductor substrate to a second silicon oxide film formed on a second substrate with the first silicon oxide film disposed between the first single crystal semiconductor substrate and the second substrate;separating the first single crystal semiconductor substrate at the hydrogen added layer by a heat treatment so that a semiconductor layer is formed over the second substrate;heating the semiconductor layer to stabilize an adhering interface between the first silicon oxide film and the second silicon oxide film;forming a single crystal semiconductor island by etching a portion of the semiconductor layer;heating the single crystal semiconductor island at a temperature within a range of 900 to 1200° C.;forming a gate insulating film on the single crystal semiconductor island;forming a gate electrode comprising polysilicon over the single crystal semiconductor island with the gate insulating film interposed therebetween;forming a side wall comprising silicon nitride adjacent to a side surface of the gate electrode,forming a metal silicide layer on the gate electrode; andforming an interlayer insulating film over the metal silicide layer and the side wall, the interlayer insulating film comprising silicon nitride,wherein the interlayer insulating film is in contact with an upper surface of the metal silicide layer. 38. The method according to claim 37, wherein the second substrate is a glass substrate. 39. The method according to claim 37, wherein the second substrate is a semiconductor substrate. 40. The method according to claim 37, further comprising a step of anodizing a portion of the first single crystal semiconductor substrate, wherein the portion of the first single crystal semiconductor substrate corresponds to the etched portion of the semiconductor layer in the step of forming the single crystal semiconductor island. 41. The method according to claim 37, wherein the step of heating the semiconductor layer is performed at a temperature within a range of 900 to 1200° C. 42. The method according to claim 37, wherein the step of heating the single crystal semiconductor island is performed in a reducing atmosphere. 43. The method according to claim 37, further comprising a step of flattening the semiconductor layer by chemical mechanical polishing. 44. The method according to claim 37, wherein the step of forming the first silicon oxide film on the first single crystal semiconductor substrate is performed by oxidation of a surface of the first single crystal semiconductor substrate.
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