CN100397575C - Method for manufacturing multi-layerstructure having strain and field effect transistor having strair layer - Google Patents
Method for manufacturing multi-layerstructure having strain and field effect transistor having strair layer Download PDFInfo
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- CN100397575C CN100397575C CNB2003101030928A CN200310103092A CN100397575C CN 100397575 C CN100397575 C CN 100397575C CN B2003101030928 A CNB2003101030928 A CN B2003101030928A CN 200310103092 A CN200310103092 A CN 200310103092A CN 100397575 C CN100397575 C CN 100397575C
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- 230000005669 field effect Effects 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims description 68
- 238000004519 manufacturing process Methods 0.000 title abstract description 18
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims abstract description 69
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 27
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 50
- 239000010703 silicon Substances 0.000 claims description 50
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 46
- 230000000750 progressive effect Effects 0.000 claims description 33
- 239000011435 rock Substances 0.000 claims description 27
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 19
- 238000010276 construction Methods 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 16
- 230000008021 deposition Effects 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 12
- SVXHDONHRAZOCP-UHFFFAOYSA-N ethane;silicon Chemical compound [Si].CC SVXHDONHRAZOCP-UHFFFAOYSA-N 0.000 claims description 10
- 229910000077 silane Inorganic materials 0.000 claims description 10
- POXCVKMBBFNXLZ-UHFFFAOYSA-N propane;silicon Chemical compound [Si].CCC POXCVKMBBFNXLZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910000078 germane Inorganic materials 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000001186 cumulative effect Effects 0.000 claims description 5
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 claims description 5
- 150000003376 silicon Chemical class 0.000 claims 2
- 238000005229 chemical vapour deposition Methods 0.000 abstract description 12
- 229910052732 germanium Inorganic materials 0.000 abstract description 8
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 abstract description 8
- 239000012495 reaction gas Substances 0.000 abstract 2
- 229910007264 Si2H6 Inorganic materials 0.000 abstract 1
- 229910005096 Si3H8 Inorganic materials 0.000 abstract 1
- 229910003818 SiH2Cl2 Inorganic materials 0.000 abstract 1
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 abstract 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 abstract 1
- 229920005591 polysilicon Polymers 0.000 abstract 1
- 238000010517 secondary reaction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 28
- 238000000151 deposition Methods 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 239000004575 stone Substances 0.000 description 9
- 239000013078 crystal Substances 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 8
- 238000006557 surface reaction Methods 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- BUMGIEFFCMBQDG-UHFFFAOYSA-N dichlorosilicon Chemical compound Cl[Si]Cl BUMGIEFFCMBQDG-UHFFFAOYSA-N 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 2
- 229910003902 SiCl 4 Inorganic materials 0.000 description 2
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- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000005049 silicon tetrachloride Substances 0.000 description 2
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 description 2
- 239000005052 trichlorosilane Substances 0.000 description 2
- 238000000038 ultrahigh vacuum chemical vapour deposition Methods 0.000 description 2
- KZNMRPQBBZBTSW-UHFFFAOYSA-N [Au]=O Chemical compound [Au]=O KZNMRPQBBZBTSW-UHFFFAOYSA-N 0.000 description 1
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- 238000002161 passivation Methods 0.000 description 1
- NHDHVHZZCFYRSB-UHFFFAOYSA-N pyriproxyfen Chemical compound C=1C=CC=NC=1OC(C)COC(C=C1)=CC=C1OC1=CC=CC=C1 NHDHVHZZCFYRSB-UHFFFAOYSA-N 0.000 description 1
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Images
Abstract
The present invention discloses a manufacturing method of a strained multilayer structure. Si2H6 or Si3H8 is used as first reaction gas for reduced pressure chemical vapor deposition (RPCVD), a gradual germanium buffer layer and a silicon germanium upper coverage layer are orderly deposited on a substrate, and then, SiH4 or SiH2Cl2 is used as secondary reaction gas for reduced pressure chemical vapor deposition to deposit a polysilicon layer on the silicon germanium upuper coverage layer to form a strained layer. The present invention also discloses a manufacturing methods of a field effect transistor with the strained layer.
Description
Technical field
The invention relates to a kind of manufacture method of semiconductor device, particularly have the sandwich construction of strain and have the method for making of the field-effect transistor of strained layer relevant for a kind of.
Background technology
For the integration that cooperates integrated circuit increases demand with the usefulness of lifting subassembly, the downsizing constantly of semiconductor subassembly size.Yet, for example, in the commonly used semiconductor subassembly of integrated circuit,, make it can be under low operating voltage as MOS field-effect transistor (MOSFET), have high drive current and usefulness at a high speed and be suitable difficulty.Therefore, many people are in the method for making great efforts to seek to improve the usefulness of MOS field-effect transistor assembly.
Someone's band structure modification of proposing to utilize stress to cause increases the mobility of carrier at present, to increase the drive current of field-effect transistor, can improve the usefulness of field effect transistor element, and this kind method has been applied in the various assemblies.The silicon channel of these assemblies is the situations that are in strain.
Traditionally, be by building crystal to grow silicon channel layer in SiGe (SiGe) layer of lax (relaxed) or substrate, with the silicon layer of preparation strain.Before the silicon channel layer of growth strain, need the Si that is out of shape gradually in silica-based upward growth lattice usually
1-xGe
xLayer, wherein the ratio x of germanium increases to 0.2 gradually from 0, is called progressive (step-graded) silicon germanium buffer herein.Follow the lax SiGe (Si of growth one deck on progressive silicon germanium buffer again
0.7Ge
0.3) last cap rock.
Above-mentioned these germanium-silicon layers and strained silicon layer are to prepare in brilliant (epitaxy) mode of heap of stone, and be wherein common with Low Pressure Chemical Vapor Deposition again.Generally speaking, employed reacting gas (processing procedure predecessor) is silicon tetrachloride (SiCl
4), dichlorosilane (SiH
2Cl
2), trichlorosilane (SiHCl
3), silane (SiH
4) etc.Its growth mechanism can be learnt by the relation curve of growth speed and temperature.Usually, the relation curve slope of above-mentioned four kinds of gases in the high-temperature region (more than 800 ℃) less, and bigger at low-temperature space, between have a breakover point.In the little zone of slope, growth speed is temperature influence more not, mainly is directly proportional with the matter biography speed of reacting gas to substrate, and this zone is called matter and passes controlled area (masstransfer controlled region).On the other hand, in the big zone of slope, growth speed is relevant with surface reaction speed, and with the temperature exponent function relation, this zone is called surface reaction control district (surface reaction controlled region).Pass the formed brilliant uniformity of film of heap of stone in controlled area (during high temperature) in matter and be better than surface reaction control district (surface reactioncontrolled region), but be unfavorable for integrating strain film to manufacture of semiconductor owing to the required growth temperature of the reacting gas that uses is higher, therefore in the existing manufacture of semiconductor, building crystal to grow carries out more than the surface reaction control district.
Yet the preparation of the brilliant film of heap of stone under low temperature (for example, below 700 ℃) is quite consuming time, when particularly using above-mentioned reacting gas.For example, (every wafer has in making on the sandwich construction of strain, need spend more than one hour at least for lowpressure CVD, LPCVD) building crystal to grow by low-pressure chemical vapor deposition.Moreover (ultra-high vacuum CVD, UHVCVD), every wafer need spend more than ten hours at least if adopt the ultravacuum chemical vapour deposition (CVD).That is, badly influence production capacity and manufacturing cost because of expending long manufacturing time.
U.S. Pat 5,951 discloses a kind of method of germanium-silicon layer No. 757, and it utilizes silane and germane to form germanium-silicon layer as the processing procedure predecessor behind hydrogen passivation one process for sapphire-based basal surface again.Moreover, U.S. Pat 6,410, disclose a kind of manufacture method No. 371 with silicon insulating barrier (SOI) of silicon/SiGe/Si floor active layers, after it had the silicon base of silica/silicon/germanium-silicon layer by making one silicon base and with silicon dioxide layer, this had the silicon insulating barrier substrate of silicon/SiGe/Si layer active layers to bind (bonding) technology be combined at the silicon dioxide layer with two silicon base via high temperature.Moreover, U.S. Pat 6,515,335 disclose a kind of method of making lax germanium-silicon layer in the substrate of silicon insulating barrier, it is earlier by form a wettable layer (wetting layer) in a silicon insulating barrier substrate, form the SiGe island in regular turn and cover cap rock on the SiGe of island comprehensively by molecular beam epitaxy (MBE) or CVD afterwards, then via a tempering program make wettable layer, SiGe island, and SiGe on cap rock generation cross reaction and form a monocrystalline silicon germanium layer, form the crystal silicon layer of heap of stone of a strain at last more thereon.In above-mentioned these methods, not that still to use silane be exactly that processing procedure is too complicated as the processing procedure predecessor, and the effective lifting subassembly production capacity of making.
Summary of the invention
In view of this, the object of the present invention is to provide and a kind ofly have the sandwich construction of strain and have the method for making of the field-effect transistor of strained layer.It uses the character of keeping strained layer simultaneously and the production capacity that increases establishment of component by adopting multiple predecessor as chemical vapor deposition process to replace traditional unitary system journey predecessor.
According to above-mentioned purpose, the invention provides a kind of method for making with sandwich construction of strain.At first, provide a substrate.Then, as one first reacting gas, in substrate in regular turn, deposit a progressive SiGe (Si by two silicon ethane/three silicon propane
1-xGe
x) cap rock on resilient coating and the SiGe, wherein x increases with progressive silicon germanium buffer thickness and cumulative to 0.3 by 0.Afterwards, as one second reacting gas, deposition one monocrystalline silicon layer is to form a strained layer on cap rock on the SiGe by silane/dichlorosilane.
Moreover above-mentioned substrate can be a silicon base, and more comprises a silicon buffer layer and be formed between substrate and the progressive silicon germanium buffer, and its thickness is 0.1 to 0.9 micron scope.
Moreover the thickness of progressive silicon germanium buffer is 2 to 5 microns scope.The thickness of cap rock is 0.5 to 1 micron scope on the SiGe.The thickness of monocrystalline silicon layer is in the scope of 100 to 300 dusts.
Moreover cap rock and monocrystalline silicon layer can form by rpcvd (RPCVD) respectively on progressive silicon germanium buffer, the SiGe.Wherein, the process temperatures of rpcvd is 600 ℃ to 800 ℃ scope, and processing procedure pressure is in the scope of 50Torr to 760Torr.
According to above-mentioned purpose, the invention provides a kind of method for making again with field-effect transistor of strained layer.At first, provide a substrate.Then, as one first reacting gas, in substrate in regular turn, deposit a progressive SiGe (Si by two silicon ethane/three silicon propane
1-xGe
x) cap rock on resilient coating and the SiGe, wherein x increases with progressive silicon germanium buffer thickness and cumulative to 0.3 by 0.Afterwards, as one second reacting gas, deposition one monocrystalline silicon layer is with as a strained channel layer on cap rock on the SiGe by silane/dichlorosilane.At last, forming a grid structure above the strained channel layer and in the strained channel layer in the grid structure outside, forming source.
Moreover, more comprising a silicon buffer layer and be formed between silicon base and the progressive silicon germanium buffer, its thickness is 0.1 to 0.9 micron scope.
Moreover the thickness of progressive silicon germanium buffer is 2 to 5 microns scope.The thickness of cap rock is 0.5 to 1 micron scope on the SiGe.The thickness of monocrystalline silicon layer is in the scope of 100 to 300 dusts.
Moreover cap rock and monocrystalline silicon layer can form by rpcvd (RPCVD) respectively on progressive silicon germanium buffer, the SiGe.Wherein, the process temperatures of rpcvd is 600 ℃ to 800 ℃ scope, and processing procedure pressure is in the scope of 50Torr to 760Torr.
Moreover grid structure comprises a gate dielectric, a gate electrode, reaches a grid gap wall.Wherein, gate dielectric is arranged at strained channel layer top, and gate electrode is arranged at the gate dielectric top, and grid gap wall is arranged at gate electrode sidewalls.
Description of drawings
Figure 1A is to show the flow process generalized section that has the field-effect transistor of strained layer according to the manufacturing of the embodiment of the invention to Fig. 1 C.
Fig. 2 shows the logarithm deposition rate of differential responses gas and the graph of relation of reaction temperature.
Symbol description:
The 10-substrate;
The 12-silicon buffer layer;
The progressive silicon germanium buffer of 14-;
Cap rock on the 16-SiGe;
The 18-monocrystalline silicon layer;
The 20-gate dielectric;
The 22-gate electrode;
The 24-grid gap wall;
The 25-grid structure;
The 26-source/drain regions.
Embodiment
Below cooperate Figure 1A to illustrate that to Fig. 1 C and Fig. 2 the manufacturing of the embodiment of the invention has the method for the field-effect transistor of strained layer.
At first, please refer to Figure 1A, a substrate 10 be provided, this substrate 10 can be a monocrystal silicon substrate, the substrate of silicon insulating barrier (silicon on insulator, SOI) or other semiconductor-based end.Herein, be with a crystallization direction for the monocrystal silicon substrate of (100) as example.Then, optionally form a silicon buffer layer 12 above substrate 10, it is in order to the crystal seed layer (seed layer) as the subsequent deposition silicon germanium buffer.In the present embodiment, silicon buffer layer 12 can be formed on the substrate 10 by brilliant mode of heap of stone, for example, uses dichlorosilane (SiH
2Cl
2), silane (SiH
4), two silicon ethane (Si
2H
6) or three silicon propane (Si
3H
8) as reacting gas, carry out chemical vapor deposition (CVD).Silicon buffer layer 12 thickness that form are in the scope of 0.1 to 0.9 micron (μ m), and preferable thickness is about 0.5 μ m.
Afterwards, deposition one germanium-silicon layer on silicon buffer layer 12.In the present embodiment, this germanium-silicon layer comprises two parts up and down.The bottom is divided into one progressive (setp-graded) SiGe (Si
1-xGe
x) resilient coating 14, and top is divided into cap rock 16 (shown in Figure 1B) on the SiGe of lax (relaxed).The atomic ratio x of germanium is cumulative to 0.3 by 0 with progressive silicon germanium buffer 14 thickness increase in the progressive silicon germanium buffer 14.That is, progressive silicon germanium buffer 14 and silicon buffer layer 12 at the interface, the content of germanium is about 0, and the top surface place of progressive silicon germanium buffer 14, the content of germanium is about 0.3, the speed of its increase is about the scope of 0.06/ μ m to 0.15/ μ m.
In the present embodiment, progressive silicon germanium buffer 14 can form by crystal type of heap of stone.Its method can be, and uses two silicon ethane or the three silicon propane reacting gas as the silicon source, and uses germane (germane, GeH
4) as the reacting gas in germanium source, carry out rpcvd (RPCVD).Wherein, the process temperatures of deposition is 600 ℃ to 800 ℃ scope.Moreover processing procedure pressure is in the scope of 50Torr to 760Torr.The thickness of the progressive silicon germanium buffer 14 that forms is in the scope of 2 to 5 μ m, and preferable thickness is about 2.1 μ m.
Next, please refer to Figure 1B, similarly, on progressive silicon germanium buffer 14, deposit a lax SiGe (Si by brilliant mode of heap of stone
1-yGe
y) last cap rock 16.Be different from progressive silicon germanium buffer 14, the germanium atom ratio y on the SiGe in the cap rock 16 is a constant, and for example y is in 0.25 to 0.3 scope.In the present embodiment, cap rock 16 on the SiGe, similarly, use two silicon ethane or the three silicon propane reacting gas as the silicon source, and use the reacting gas of germane as the germanium source, carry out rpcvd.Wherein, the process temperatures of deposition is 600 ℃ to 800 ℃ scope.Moreover the flow of two silicon ethane/three silicon propane is 50 to the scope of 200sccm, and the flow of germane is in 50 to 200sccm scope.Moreover processing procedure pressure is in the scope of 50Torr to 760Torr.The thickness of cap rock 16 is in the scope of 0.5 to 1 μ m on the SiGe that forms, and preferable thickness is about 0.9 μ m.Herein, the progressive silicon germanium buffer 14 in the germanium-silicon layer is to arrange (threading dislocation) in order to the lattice defect-difference of assembling and reduce wherein, and cap rock 16 then provides the usefulness of follow-up formation strained layer on the SiGe.
On forming progressive silicon germanium buffer 14 and SiGe, after the cap rock 16, then deposit a monocrystalline silicon layer 18 thereon, to form a strained silicon layer, in order to strained channel layer as follow-up transistor fabrication.In the present embodiment, monocrystalline silicon layer 18 also can adopt brilliant mode of heap of stone to form.Yet, be to use silane or dichlorosilane to carry out rpcvd and do not use two silicon ethane or three silicon propane as the reacting gas in silicon source herein, this is the lifting that is beneficial in order to reduce the hydrogen content in the monocrystalline silicon layer 18 as carrier migration rate in the monocrystalline silicon layer 18 of strained channel layer.Wherein, the process temperatures of deposition is 600 ℃ to 800 ℃ scope.Moreover processing procedure pressure is in the scope of 50Torr to 760Torr.The thickness of the monocrystalline silicon layer 18 that forms 100 to 300 dusts (
) scope, and preferable thickness is about 135
Thus, just finish the sandwich construction with strain of the present invention.
At last, please refer to 1C figure, above strained silicon layer 18, form a grid structure 25.It comprises a gate dielectric 20, a gate electrode 22, reaches a gate electrode 24.Gate dielectric 20 is strained silicon layer 18 tops that are arranged at as channel layer.Moreover 22 of gate electrodes are arranged at gate dielectric 20 tops.In addition, grid gap wall 24 is arranged at gate electrode sidewalls.
Herein, the method that forms grid structure 25 is as follows: at first, can by thermal oxidation method above strained silicon layer 18, form one silica layer (not illustrating) wherein the temperature of oxidation be to be lower than 800 ℃.Then, can be by conventional deposition technique, for example chemical vapour deposition (CVD) forms a compound crystal silicon layer (not illustrating) above silicon oxide layer, and utilize known little shadow and etching technique, define the gate dielectric 20 that constitutes by silicon oxide layer and by gate electrode 22 that compound crystal silicon layer constituted.Afterwards, can deposit a silicon nitride layer (not illustrating) on strained silicon layer 18 surfaces with gate electrode sidewalls and surperficial compliance by chemical vapour deposition (CVD) equally, and the person of connecing utilizes anisotropic etching, reactive ion etching (reactive ion etching for example, RIE), etches both silicon nitride layer, to stay the silicon nitride layer 24 of part at gate electrode 22 sidewalls, this promptly is made for the usefulness of grid gap wall 24.
After finishing the making of grid structure 25, can on the strained channel layer 18 in grid structure 25 outsides and SiGe, form doped region 26 in the cap rock 16 to be made for the usefulness of source/drain regions by implanting ions.Thus, just finishing the gold oxygen semiconductor field effect transistor (MOSFET) with strained layer makes.
Be noted that,, yet have the knack of this skill person, can, the present invention is integrated in the making of other semiconductor subassembly, for example CMOS transistor according to the needs of circuit unit design though the present invention is being example having on the sandwich construction of strain the MOSFET of making.
Next, please refer to Fig. 2, its logarithm deposition rate (μ m/min) that shows differential responses gas and reaction temperature (℃) graph of relation.As discussed previously, each curve A among the figure, B, C, D, and the slope of E less when high temperature, and bigger at low temperature, between have a breakover point.The zone that slope is little is matter and passes the controlled area, and the big zone of slope is the surface reaction control district.Moreover the A curve representation is with silicon tetrachloride (SiCl
4) be reacting gas, the B curve representation is with trichlorosilane (SiHCl
3) be reacting gas, C curve is represented with dichlorosilane (SiH
2Cl
2) be reacting gas, the D curve representation is with silane (SiH
4) be reacting gas, the E curve representation is with two silicon ethane (Si
2H
6) be reacting gas.
For restriction in response to the brilliant processing procedure of heap of stone of low temperature (for example below 700 ℃) now, must be at surface reaction control district deposit film.Significantly, using under reacting gas A, B, C, the D situation, deposition rate is far below reacting gas E.Therefore, the present invention adopts reacting gas E to prepare that cap rock can significantly promote deposition rate and effectively shorten the processing procedure time on progressive silicon germanium buffer and the SiGe, and then the lifting subassembly production capacity of making and reduce cost of manufacture.
Moreover, as described above, in order to promote the carrier migration rate, hydrogen content in the strained silicon layer can not be too much, therefore the present invention adopts reacting gas C or D to prepare strained silicon layer, compared to adopting reacting gas E, can increase carrier speed and makes assembly have preferable electrical characteristics.In addition, compared to adopting reacting gas A, B, can have faster deposition rate and shorten the processing procedure time.
Claims (23)
1. the method for making with sandwich construction of strain comprises the following steps:
One substrate is provided;
By two silicon ethane/three silicon propane as rpcvd one first reacting gas, above this substrate, to form a progressive SiGe Si in regular turn
1-xGe
xCap rock on a resilient coating and the SiGe, wherein x increases with this progressive silicon germanium buffer thickness and by 0 cumulative to 0.3, and the process temperatures of this rpcvd is 600 ℃ to 800 ℃ scope, and processing procedure pressure is in the scope of 50Torr to 760Torr; And
As one second reacting gas, form a strained layer by silane/dichlorosilane with deposition one monocrystalline silicon layer on cap rock on this SiGe.
2. the method for making with sandwich construction of strain according to claim 1, wherein this substrate is a silicon base.
3. the method for making with sandwich construction of strain according to claim 2 comprises that more a silicon buffer layer is formed between this substrate and this progressive silicon germanium buffer.
4. the method for making with sandwich construction of strain according to claim 3, wherein the thickness of this silicon buffer layer is 0.1 to 0.9 micron scope.
5. the method for making with sandwich construction of strain according to claim 1, wherein this first reacting gas more comprises germane.
6. the method for making with sandwich construction of strain according to claim 1, wherein the thickness of this progressive silicon germanium buffer is 2 to 5 microns scope.
7. the method for making with sandwich construction of strain according to claim 1, wherein on this SiGe the thickness of cap rock 0.5 to 1 micron scope.
8. the method for making with sandwich construction of strain according to claim 1, wherein the thickness of this monocrystalline silicon layer is in the scope of 100 to 300 dusts.
9. the method for making with sandwich construction of strain according to claim 1 wherein forms this monocrystalline silicon layer by rpcvd.
10. the method for making with sandwich construction of strain according to claim 9, wherein the process temperatures of this rpcvd is 600 ℃ to 800 ℃ scope.
11. the method for making with sandwich construction of strain according to claim 9, wherein the processing procedure pressure of this rpcvd is in the scope of 50Torr to 760Torr.
12. the method for making with field-effect transistor of strained layer comprises the following steps:
One silicon base is provided;
By two silicon ethane/three silicon propane as rpcvd one first reacting gas, above this substrate, to form a progressive SiGe Si in regular turn
1-xGe
xCap rock on a resilient coating and the SiGe, wherein x increases with this progressive silicon germanium buffer thickness and by 0 cumulative to 0.3, and the process temperatures of this rpcvd is 600 ℃ to 800 ℃ scope, and processing procedure pressure is in the scope of 50Torr to 760Torr; And
By silane/dichlorosilane as one second reacting gas, with deposition one monocrystalline silicon layer and on cap rock on this SiGe as a strained channel layer;
Above this strained channel layer, form a grid structure; And
In this strained channel layer in this grid structure outside, form source.
13. the method for making with field-effect transistor of strained layer according to claim 12, wherein this substrate is a silicon base.
14. the method for making with field-effect transistor of strained layer according to claim 13 comprises that more a silicon buffer layer is formed between this substrate and this progressive silicon germanium buffer.
15. the method for making with field-effect transistor of strained layer according to claim 14, wherein the thickness of this silicon buffer layer is 0.1 to 0.9 micron scope.
16. the method for making with field-effect transistor of strained layer according to claim 12, wherein this first reacting gas more comprises germane.
17. the method for making with field-effect transistor of strained layer according to claim 12, wherein the thickness of this progressive silicon germanium buffer is 2 to 5 microns scope.
18. the method for making with field-effect transistor of strained layer according to claim 12, wherein on this SiGe the thickness of cap rock 0.5 to 1 micron scope.
19. the method for making with field-effect transistor of strained layer according to claim 12, wherein the thickness of this monocrystalline silicon layer is in the scope of 100 to 300 dusts.
20. the method for making with field-effect transistor of strained layer according to claim 12 wherein forms this monocrystalline silicon layer by rpcvd.
21. the method for making with field-effect transistor of strained layer according to claim 20, wherein the process temperatures of this rpcvd is 600 ℃ to 800 ℃ scope.
22. the method for making with field-effect transistor of strained layer according to claim 20, wherein the processing procedure pressure of this rpcvd is in the scope of 50Torr to 760Torr.
23. the method for making with field-effect transistor of strained layer according to claim 12, wherein this grid structure more comprises:
One gate dielectric is arranged at this strained channel layer top;
One gate electrode is arranged at this gate dielectric top; And
One grid gap wall is arranged at this gate electrode sidewalls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| US5273930A (en) * | 1992-09-03 | 1993-12-28 | Motorola, Inc. | Method of forming a non-selective silicon-germanium epitaxial film |
| US6410371B1 (en) * | 2001-02-26 | 2002-06-25 | Advanced Micro Devices, Inc. | Method of fabrication of semiconductor-on-insulator (SOI) wafer having a Si/SiGe/Si active layer |
| CN1359158A (en) * | 2001-12-29 | 2002-07-17 | 中国科学院上海微系统与信息技术研究所 | Material similar to silicon structure on isolation layer and preparation method |
| US20020123197A1 (en) * | 2000-12-04 | 2002-09-05 | Fitzgerald Eugene A. | Method of fabricating CMOS inverter and integrated circuits utilizing strained silicon surface channel mosfets |
| JP2003045811A (en) * | 2001-07-31 | 2003-02-14 | Hitachi Kokusai Electric Inc | Method for manufacturing semiconductor device and wafer processing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5273930A (en) * | 1992-09-03 | 1993-12-28 | Motorola, Inc. | Method of forming a non-selective silicon-germanium epitaxial film |
| US20020123197A1 (en) * | 2000-12-04 | 2002-09-05 | Fitzgerald Eugene A. | Method of fabricating CMOS inverter and integrated circuits utilizing strained silicon surface channel mosfets |
| US6410371B1 (en) * | 2001-02-26 | 2002-06-25 | Advanced Micro Devices, Inc. | Method of fabrication of semiconductor-on-insulator (SOI) wafer having a Si/SiGe/Si active layer |
| JP2003045811A (en) * | 2001-07-31 | 2003-02-14 | Hitachi Kokusai Electric Inc | Method for manufacturing semiconductor device and wafer processing system |
| CN1359158A (en) * | 2001-12-29 | 2002-07-17 | 中国科学院上海微系统与信息技术研究所 | Material similar to silicon structure on isolation layer and preparation method |
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| Title |
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| 气态源分子束外延GESI合金中的低温生长动力学研究. 刘学锋，刘金平，李建平，孙殿照，孔梅影，林兰英.半导体学报，第19卷第5期. 1998 |
| 气态源分子束外延GESI合金中的低温生长动力学研究. 刘学锋，刘金平，李建平，孙殿照，孔梅影，林兰英.半导体学报，第19卷第5期. 1998 * |
| 高电子迁移率SI/SIGE异质结构：缓解性ISGE缓冲层的影响. F，SCHA，FFLERR.半导体情报，第30卷第4期. 1993 |
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