Fabrication and structures of crystalline material
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01L-031/117
H01L-021/02
H01L-029/161
H01L-029/32
출원번호
US-0406371
(2017-01-13)
등록번호
US-9984872
(2018-05-29)
발명자
/ 주소
Park, Ji-Soo
Fiorenza, James G.
출원인 / 주소
Taiwan Semiconductor Manufacturing Company, Ltd.
대리인 / 주소
Slater Matsil, LLP
인용정보
피인용 횟수 :
0인용 특허 :
255
초록▼
A surface of the first semiconductor crystalline material has a reduced roughness. A semiconductor device includes a low defect, strained second semiconductor crystalline material over the surface of the first crystalline material. A surface of the strained second semiconductor crystalline material
A surface of the first semiconductor crystalline material has a reduced roughness. A semiconductor device includes a low defect, strained second semiconductor crystalline material over the surface of the first crystalline material. A surface of the strained second semiconductor crystalline material has a reduced roughness. One example includes obtaining a surface with reduced roughness by creating process parameters that reduce impurities at an interfacial boundary between the first and second semiconductor crystalline materials. In one embodiment, the first semiconductor crystalline material can be confined by an opening in an insulator having an aspect ratio sufficient to trap defects using Aspect Ratio Trapping techniques.
대표청구항▼
1. A method of manufacturing a semiconductor structure, the method comprising: providing a semiconductor crystalline substrate;forming an insulator defining openings to a surface of the substrate; andgrowing a first semiconductor crystalline material lattice-mismatched with the substrate within the
1. A method of manufacturing a semiconductor structure, the method comprising: providing a semiconductor crystalline substrate;forming an insulator defining openings to a surface of the substrate; andgrowing a first semiconductor crystalline material lattice-mismatched with the substrate within the openings of the insulator;polishing a top surface of the first semiconductor crystalline material and the insulator;growing a second semiconductor crystalline material over the polished first semiconductor crystalline material; andbefore growing the second semiconductor crystalline material, heating the polished top surface at a selected temperature range to reduce impurities at the interface of the first and second semiconductor crystalline material. 2. The method of claim 1, wherein the heating comprises heating at temperatures between 760° C. to 860° C. 3. The method of claim 1, wherein a top surface of the second semiconductor crystalline material has a surface roughness root-mean-square (RMS) of about 5 nm or less, about 3 nm or less, about 1 nm or less, about 0.5 nm or less, or no greater than 0.3 nm. 4. The method of claim 1, wherein the interface has reduced oxygen impurity concentrations. 5. The method of claim 1, wherein the second semiconductor crystalline material is elastically strained at least along a first direction relative to an opening, along a second direction perpendicular to the first direction or along both the first and second directions. 6. The method of claim 1, wherein the openings have an aspect ratio sufficient to trap defects in the first semiconductor crystalline material, and further comprising forming a semiconductor device at least in part in an opening. 7. The method of claim 1, wherein the heating comprises heating at a temperature range independent of a temperature used in the growing a second semiconductor crystalline material. 8. A method of manufacturing a semiconductor structure comprising: epitaxially growing by chemical vapor deposition (CVD) a first semiconductor crystalline material on a polished surface of a lattice-mismatched semiconductor crystalline material exposed within an opening of an insulator; andbefore epitaxially growing the first semiconductor crystalline material, cleaning the polished surface by heating to reduce an oxygen impurity concentration below a prescribed level. 9. The method of claim 8, wherein the first semiconductor crystalline material is a group IV element or compound including at least one group IV element. 10. The method of claim 8, wherein the epitaxially growing step includes growing strained Ge on a SiGe alloy. 11. The method of claim 8, wherein the heating comprises heating at temperatures between 760° C. to 860° C. 12. The method of claim 8, wherein a top surface of the first semiconductor crystalline material has a surface roughness root-mean-square (RMS) of about 5 nm or less. 13. The method of claim 8 further comprising: epitaxially growing the lattice-mismatched semiconductor crystalline material from a substrate within the opening of the insulator; andpolishing a top surface of the lattice-mismatched semiconductor crystalline material and the insulator with a chemical mechanical polishing process, wherein after the polishing, top surfaces of the lattice-mismatched semiconductor crystalline material and the insulator are level. 14. The method of claim 13, wherein after epitaxially growing the lattice-mismatched semiconductor crystalline material, the lattice-mismatched semiconductor crystalline material has a top surface higher a top surface of the insulator. 15. The method of claim 8, wherein the opening in the insulator has an aspect ratio sufficient to trap defects in the lattice-mismatched semiconductor crystalline material, and further comprising forming a semiconductor device at least in part in the opening of the insulator. 16. A method comprising: forming an insulator layer over a substrate, the insulator layer having openings exposing the substrate;epitaxially growing a first semiconductor crystalline material from the substrate within the openings of the insulator layer, wherein after epitaxially growing the first semiconductor crystalline material, the first semiconductor crystalline material has a top surface above a top surface of the insulator layer;performing a chemical mechanical polishing process on the top surface of the first semiconductor crystalline material and the top surface of the insulator layer to level the top surfaces the first semiconductor crystalline material and the insulator layer;heating the polished top surface of the first semiconductor crystalline material; andafter heating the polished top surface of the first semiconductor crystalline material, epitaxially growing a second semiconductor crystalline material from the polished top surface of first semiconductor crystalline material. 17. The method of claim 16, wherein heating the polished top surface of the first semiconductor crystalline material reduces an oxygen impurity concentration at an interface of the first and second semiconductor crystalline material. 18. The method of claim 16, wherein a top surface of the second semiconductor crystalline material has a surface roughness root-mean-square (RMS) of about 5 nm or less. 19. The method of claim 16, wherein the first semiconductor crystalline material is a SiGe alloy, and wherein the second semiconductor crystalline material is a strained Ge. 20. The method of claim 16, wherein the first semiconductor crystalline material is lattice mismatched to the substrate.
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