CN110158154A - Constant-current stabilizer and crystal pulling furnace - Google Patents
Constant-current stabilizer and crystal pulling furnace Download PDFInfo
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- CN110158154A CN110158154A CN201910561753.2A CN201910561753A CN110158154A CN 110158154 A CN110158154 A CN 110158154A CN 201910561753 A CN201910561753 A CN 201910561753A CN 110158154 A CN110158154 A CN 110158154A
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B27/00—Single-crystal growth under a protective fluid
- C30B27/02—Single-crystal growth under a protective fluid by pulling from a melt
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/06—Silicon
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B30/00—Production of single crystals or homogeneous polycrystalline material with defined structure characterised by the action of electric or magnetic fields, wave energy or other specific physical conditions
- C30B30/04—Production of single crystals or homogeneous polycrystalline material with defined structure characterised by the action of electric or magnetic fields, wave energy or other specific physical conditions using magnetic fields
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- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The present invention provides a kind of constant-current stabilizer and crystal pulling furnace, wherein, constant-current stabilizer is applied to crystal pulling furnace, it include: the first current stabilization cover, the first current stabilization cover is equipped with multiple first through hole, the first current stabilization cover is for being mounted in the secondary furnace chamber of the crystal pulling furnace, to adjust the flow direction for the inert gas being passed through in the crystal pulling furnace；Second current stabilization cover, the second current stabilization cover is equipped with multiple second through-holes, the second current stabilization cover is used to be mounted on the secondary furnace chamber of the crystal pulling furnace, and is oppositely arranged with the first current stabilization cover, for adjusting the flow direction by the first current stabilization cover inert gas adjusted.Inert gas flows direction can be constrained in constant-current stabilizer according to the present invention, reduces the amplitude of fluctuation of silicon single crystal rod, reduces crystal growth dislocation phenomenon odds, impurity is avoided to pollute and corrode crystal bar and thermal field component side wall.
Description
Technical field
The present invention relates to technical field of manufacturing semiconductors, in particular to a kind of constant-current stabilizer and crystal pulling furnace.
Background technique
Magnetic field Czochralski method, that is, MCZ (Magnetic Field Applied Czochralski Method) is used as at present most
It for a kind of universal crystal pulling technique method, is popularized with inhibiting the thermal convection of polycrystalline melted silicon in crystal growth, while can also made
For a kind of mode for reducing oxygen content in silicon single crystal rod.
In the prior art, silicon single crystal rod is manufactured using crystal pulling furnace, it is former to melt polysilicon by the silica crucible in crystal pulling furnace
Material, under polycrystalline silicon raw material molten condition, silica crucible can occur to react as follows: SiO2(s) → Si (l)+2O, by silica crucible
The oxygen atom that wall generates, by the stirring action of free convection, and is uniformly distributed among silicon solution, and it is molten to be partially present in silicon
The oxygen atom on liquid surface, it may occur that following reaction: Si (l)+O → SiO (g) is vapored away in the form of silicon monoxide (SiO).For
Impurity in control crystal pulling furnace, needs to be passed through argon gas after vacuumizing in furnace.As protective gas, pass through the upper of secondary furnace chamber
Side feeds argon gas, and such as guide shell device is arranged in main furnace chamber, to adjust argon gas flow direction and speed, improves
Oxide transmission direction in crystal pulling furnace.However, when argon gas is passed through in crystal pulling furnace pair furnace chamber, due to speed of the argon gas in furnace
Range is between 0.9m/s~8.0m/s, so whole sinuous flow is more in secondary furnace chamber furnace, since traction rope is longer, silicon single crystal rod is drawn
Initial stage processed be easy to cause shaking, is unfavorable for the steady contact in long crystal boundary face, easily causes crystal dislocation etc., increases crystal bar melt back
Number improves cost, and traditional guide shell can also make main furnace chamber there are more sinuous flows, be unfavorable for the discharge of impurity, lead
Impurity is caused to be bonded in thermal field component side wall.
Summary of the invention
In view of this, the present invention provides a kind of constant-current stabilizer, by the secondary furnace chamber that the constant-current stabilizer is mounted on to crystal pulling furnace
It is interior, the flow direction for being passed through the indoor inert gas of secondary furnace can be arranged, it is more and make to solve gas turbulence in secondary furnace chamber
Silicon single crystal rod early growth period is easy to shake, and then it is unstable to cause long crystal boundary face to contact with molten surface, and dislocation easily occurs for crystal
The problem of.
In order to solve the above technical problems, the present invention provides a kind of constant-current stabilizer.
The constant-current stabilizer of embodiment according to a first aspect of the present invention is applied to crystal pulling furnace, comprising:
First current stabilization cover, the first current stabilization cover are equipped with multiple first through hole, and the first current stabilization cover is for being mounted on
In the secondary furnace chamber of the crystal pulling furnace, to adjust the flow direction for the inert gas being passed through in the crystal pulling furnace；
Second current stabilization cover, the second current stabilization cover are equipped with multiple second through-holes, and the second current stabilization cover is for being mounted on
The secondary furnace chamber of the crystal pulling furnace, and be oppositely arranged with the first current stabilization cover, it is adjusted for adjusting by the first current stabilization cover
The flow direction of the inert gas afterwards.
Preferably, the first current stabilization cover is formed as one end wide opening, the funnel type of other end slot, the first current stabilization cover
For being rectified to the inert gas being passed through in the crystal pulling furnace, wide mouth end of the inert gas from the first current stabilization cover
It flows into, the outflow of slot end；
The second current stabilization cover is formed as one end wide opening, the funnel type of other end slot, the slot of the second current stabilization cover
It holds and is oppositely arranged with the slot end of the first current stabilization cover, the second current stabilization cover is for equal to the inert gas after rectification
Even shunting.
Preferably, constant-current stabilizer further include:
Distance regulating mechanism expands steady for adjusting the distance between the first current stabilization cover and the second current stabilization cover
Flow section.
Preferably, the distance regulating mechanism includes:
Spacing adjusting bracket is connect with the first current stabilization cover and the second current stabilization cover respectively, alternatively, the spacing tune
Section bracket is connect with the first current stabilization cover or the second current stabilization cover；
First driving mechanism is connect with the spacing adjusting bracket, for driving the spacing adjusting bracket, make it is described between
The first current stabilization cover and the second current stabilization cover is driven to draw close or deviate to each other away from adjusting bracket.
Preferably, constant-current stabilizer further include:
Height adjustment mechanism is connect with the distance regulating mechanism, for driving the distance regulating mechanism mobile to adjust
The whole first current stabilization cover and second current stabilization cover on the indoor height of secondary furnace of the crystal pulling furnace.
Preferably, first driving mechanism is connect with the spacing adjusting bracket by transmission parts, the driving section
Part includes transmission belt or transmission chain.
Preferably, each first current stabilization cover and each second current stabilization cover are one group, and the constant-current stabilizer includes
Multiple groups the first current stabilization cover and the second current stabilization cover.
Preferably, the percent opening of the first current stabilization cover and the second current stabilization cover is 80%~95%.
Preferably, the cross section of the first through hole and second through-hole is round, rectangular, triangle or a variety of mixes
It closes.
Preferably, the cross section of the first through hole and second through-hole is circle, and the first through hole is logical with second
The pore diameter range in hole is between 5~20mm.
The crystal pulling furnace of embodiment according to a second aspect of the present invention, including furnace body, include in the furnace body main furnace chamber and with institute
The secondary furnace chamber that main furnace chamber is connected is stated, the constant-current stabilizer such as above-described embodiment is equipped in the pair furnace chamber.
Preferably, the constant-current stabilizer includes distance regulating mechanism, for adjusting the first current stabilization cover and described second
The distance between current stabilization cover is to expand current stabilization section；
One end of the first current stabilization cover and the second current stabilization cover passes through the furnace body of the secondary furnace chamber, and described first is steady
One end of one end and/or the second current stabilization cover for flowing cover is connect with the distance regulating mechanism.
Preferably, the distance regulating mechanism includes:
Spacing adjusting bracket, the spacing adjusting bracket respectively with the first current stabilization cover and the second current stabilization cover one
End connection, alternatively, the spacing adjusting bracket is connect with one end of one end of the first current stabilization cover or the second current stabilization cover；
First driving mechanism is connect with the spacing adjusting bracket, for driving the spacing adjusting bracket mobile so that
The first current stabilization cover and second current stabilization cover in the secondary furnace chamber to bringing together or deviate from.
The advantageous effects of the above technical solutions of the present invention are as follows:
1) constant-current stabilizer according to an embodiment of the present invention, can flow direction to the inert gas for being passed through crystal pulling furnace pair furnace chamber into
Row arranges, and to reduce the turbulence intensity of inert gas inside crystal pulling furnace pair furnace chamber, by constraining inert gas flows direction, reduces
Because of the swing of silicon single crystal rod caused by air-flow, facilitates silicon single crystal rod and melt the steady contact of liquid level, reduce crystal growth position
Phenomena such as wrong odds, meanwhile, the impurity for reducing main furnace chamber is carried by sinuous flow to secondary furnace chamber, to crystal bar and thermal field component
Side wall is polluted and is corroded；
2) the first current stabilization cover and the second current stabilization cover percent opening with higher, can be set according to the actual situation, into
One step controls inert gas flow velocity in furnace, and the impurity for reducing main furnace chamber is carried to secondary furnace chamber by sinuous flow, prevented to crystal bar and heat
The side wall of field component is polluted and is corroded；
3) it can change the spacing of the first current stabilization cover and the second current stabilization cover by distance regulating mechanism, expand current stabilization section,
Further improve main furnace chamber crystal growth environment, inhibit sinuous flow, reduces crystal remelting probability；
4) it is located at the height of secondary furnace chamber by the first current stabilization cover of control and the second current stabilization cover, is adapted to growth different length
Crystal bar.
Detailed description of the invention
Fig. 1 a is the front view of a structure of constant-current stabilizer of the invention；
Fig. 1 b is the top view of constant-current stabilizer in Fig. 1；
Fig. 1 c is the front view of another structure of constant-current stabilizer of the invention；
Fig. 1 d is the top view of constant-current stabilizer in Fig. 1 c；
Fig. 1 e is the front view of another structure of constant-current stabilizer of the invention；
Fig. 1 f is the top view of constant-current stabilizer in Fig. 1 e；
Fig. 1 g is the front view of another structure of constant-current stabilizer of the invention；
Fig. 2 a is a structural schematic diagram of the first current stabilization cover and the second current stabilization cover of the invention；
Fig. 2 b is another structural schematic diagram of the first current stabilization cover and the second current stabilization cover of the invention；
Fig. 2 c is another structural schematic diagram of the first current stabilization cover and the second current stabilization cover of the invention；
Fig. 2 d is another structural schematic diagram of the first current stabilization cover and the second current stabilization cover of the invention；
Fig. 2 e is another structural schematic diagram of the first current stabilization cover and the second current stabilization cover of the invention；
Fig. 2 f is another structural schematic diagram of the first current stabilization cover and the second current stabilization cover of the invention；
Fig. 2 g is another structural schematic diagram of the first current stabilization cover and the second current stabilization cover of the invention；
Fig. 2 h is another structural schematic diagram of the first current stabilization cover and the second current stabilization cover of the invention；
Fig. 2 i is another structural schematic diagram of the first current stabilization cover and the second current stabilization cover of the invention；
Fig. 3 a is a structural schematic diagram of transmission parts of the invention；
Fig. 3 b is another structural schematic diagram of transmission parts of the invention；
Fig. 3 c is another structural schematic diagram of transmission parts of the invention；
Fig. 3 d is another structural schematic diagram of transmission parts of the invention；
Fig. 4 is the state diagram of the gas flowing in a crystal pulling furnace of the invention；
Fig. 5 is the state diagram of the gas flowing in another crystal pulling furnace of the invention.
Appended drawing reference
Constant-current stabilizer 100；
First current stabilization cover 110；First through hole 111；
Second current stabilization cover 120；Second through-hole 121；
Distance regulating mechanism 130；Spacing adjusting bracket 131；First driving mechanism 132；Transmission parts 133；
Height adjustment mechanism 140；
Crystal pulling furnace 200；
Furnace body 210；Main furnace chamber 211；Secondary furnace chamber 212；Guide shell 213；
Inert gas 300；
Impurity 400.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright a part of the embodiment, instead of all the embodiments.Based on described the embodiment of the present invention, ordinary skill
Personnel's every other embodiment obtained, shall fall within the protection scope of the present invention.
Constant-current stabilizer 100 according to an embodiment of the present invention is specifically described in conjunction with attached drawing first below.
As shown in Fig. 1 a to Fig. 5, constant-current stabilizer 100 according to an embodiment of the present invention is applied to crystal pulling furnace 200, including the
One current stabilization cover 110 and the second current stabilization cover 120.
Specifically, the first current stabilization cover 110 is equipped with multiple first through hole 111, and the first current stabilization cover 110 is for being mounted on crystal pulling
In the secondary furnace chamber 212 of furnace 200, to adjust the flow direction for the inert gas 300 being passed through in crystal pulling furnace 200；It is set on second current stabilization cover 120
Have multiple second through-holes 121, the second current stabilization cover 120 is used to be mounted on the secondary furnace chamber 212 of crystal pulling furnace 200, and with the first current stabilization cover
110 are oppositely arranged, for adjusting the flow direction for passing through the inert gas 300 adjusted of the first current stabilization cover 110.
That is, inert gas 300 passes through first after being passed through inert gas 300 to the secondary furnace chamber 212 of crystal pulling furnace 200
After crossing the first through hole 111 of the first current stabilization cover 110, flow direction is combed, and becomes stream straight down by original sinuous flow
To mitigate the air turbulence phenomenon of inert gas 300, subsequent air-flow is flowed out from the second through-hole 121 of the second current stabilization cover 120
And comb herein, the air-flow of more steady ordered is formed, when the gas by combing flows through the silicon single crystal rod surface of main furnace chamber 211
When, silicon single crystal rod can be reduced because of the amplitude of fluctuation of airflow influence, facilitate silicon single crystal rod and melt the steady contact of liquid level, drop
Phenomena such as low crystal growth dislocation occurrence probability, improve the production efficiency of silicon single crystal rod.Simultaneously as the stream that air-flow is uniform and stable
Dynamic, the impurity 400 that can reduce main furnace chamber 211 is carried by sinuous flow to secondary furnace chamber 212, is conducive to the discharge of impurity 400, is kept away
Exempt from the problems such as impurity 400 is polluted and corroded to crystal bar and thermal field component side wall.
Constant-current stabilizer 100 according to an embodiment of the present invention as a result, can be to the inertia for being passed through the secondary furnace chamber 212 of crystal pulling furnace 200
The flow direction of gas 300 is combed, and keeps gas flow more orderly, can reduce by the 212 inside indifferent gas of secondary furnace chamber of crystal pulling furnace 200
The turbulence intensity of body 300 constrains 300 flow direction of inert gas, and the swing of silicon single crystal rod, facilitates caused by reducing because of air-flow
Silicon single crystal rod and melting liquid level steady contact, reduce crystal growth dislocation phenomena such as odds, improve silicon single crystal rod
Production efficiency, the impurity 400 that can reduce main furnace chamber 211 are carried by sinuous flow to secondary furnace chamber 212, and 400 pairs of crystalline substances of impurity are avoided
The problems such as stick and thermal field component side wall are polluted and are corroded.
Preferably, as shown in Fig. 1 c, Fig. 4 and Fig. 5, the first current stabilization cover 110 is formed as one end wide opening, the leakage of other end slot
Bucket type, the first current stabilization cover 110 are used to rectify the inert gas 300 being passed through in crystal pulling furnace 200, and inert gas 300 is steady from first
The wide mouth end of stream cover 110 flows into, and slot end outflow, the second current stabilization cover 120 is formed as one end wide opening, the funnel of other end slot
Type, the slot end of the second current stabilization cover 120 and the slot end of the first current stabilization cover 110 are oppositely arranged, and the second current stabilization cover 120 is used for whole
Inert gas 300 after stream uniformly shunts.
That is, the first current stabilization cover 110 and the second current stabilization cover 120 are funnel type, i.e., one end is wide opening, and the other end is
Slot, the slot end of the first current stabilization cover 110 are disposed adjacent with the slot end of the second current stabilization cover 120, when current stabilization, inert gas 300
It is flowed into first from the wide mouth end of the first current stabilization cover 110, the outflow of slot end, the flowing side after first through hole 111 of inert gas 300
To being combed, rectifying, mitigate the air turbulence phenomenon of inert gas 300, subsequent air-flow is flowed from the slot end of the second current stabilization cover 120
Into, wide mouth end outflow, the air-flow after rectification forms the air-flow of more steady ordered after the second through-hole 121 uniformly shunts,
Phenomena such as further decreasing amplitude of fluctuation of the silicon single crystal rod because of airflow influence, reducing crystal growth dislocation occurrence probability, further
The production efficiency for improving silicon single crystal rod, is more conducive to the discharge of impurity 400, preferably protects crystal bar and thermal field component.
Wherein, the shape of the first current stabilization cover 110 in the present invention and the second current stabilization cover 120 is not limited to this, of the invention
In other embodiments, the current stabilization cover of other shapes, such as taper can also be used, it can be according to the shape of crystal pulling furnace pair furnace chamber 212
Shape is designed, and the shape of the first current stabilization cover 110 and the second current stabilization cover 120 can also be different.
Inert gas 300 in the present invention can be preferably argon gas, and argon gas has preferable stability as protective gas.
According to one embodiment of present invention, constant-current stabilizer 100 further includes distance regulating mechanism 130, for adjusting first
The distance between current stabilization cover 110 and the second current stabilization cover 120 are to expand current stabilization section.
In other words, the first current stabilization cover 110 is connected with the second current stabilization cover 120 by distance regulating mechanism 130, and spacing adjusts machine
The distance between the adjustable first current stabilization cover 110 of structure 130 and the second current stabilization cover 120, to make by the first current stabilization cover 110
Air-flow flows to the second current stabilization cover 120 behind longer current stabilization section, and the flow velocity of further stabilizing gas, it is steady that air-flow passes through second
More smooth sequential after stream cover 120, further to improve the growing environment of the silicon single crystal rod of main furnace chamber 211.
Preferably, distance regulating mechanism 130 includes spacing adjusting bracket 131 and the first driving mechanism 132, and spacing adjusts branch
Frame 131 is connect with the first current stabilization cover 110 and the second current stabilization cover 120 respectively, alternatively, spacing adjusting bracket 131 and the first current stabilization cover
110 or second current stabilization cover 120 connect, the first driving mechanism 132 is connect with spacing adjusting bracket 131, for driving spacing to adjust
Bracket 131 makes spacing adjusting bracket 131 that the first current stabilization cover 110 and the second current stabilization cover 120 be driven to draw close or deviate to each other.
That is, the first current stabilization cover 110 and the second current stabilization cover 120 can be connect with spacing adjusting bracket 131 respectively,
It can be that the first current stabilization cover is connect with spacing adjusting bracket or the second current stabilization cover 120 is connect with spacing adjusting bracket 131,
When spacing adjusting bracket 131 is connect with the first current stabilization cover 110 and the second current stabilization cover 120, the first driving mechanism 132 can be driven
Spacing adjusting bracket 131 drives the first current stabilization cover 110 and the second current stabilization cover 120 to draw close to each other or separate, and then adjusts first
The distance between current stabilization cover 110 and the second current stabilization cover 120, the distance can effectively improve the steady flow result of air-flow, make air-flow
The adjustment direction again after the spacing, is not only convenient for coutroi velocity, and can preferably adjust the flow direction of air-flow.It can also adopt
It is connect with spacing adjusting bracket 131 with the first current stabilization cover 110, and the second current stabilization cover 120 is fixed, alternatively, the first current stabilization cover 110 is solid
Fixed, spacing adjusting bracket 131 is connect with the second current stabilization cover 120, by drive the first current stabilization cover 110 or the second current stabilization cover 120 with
Adjust the spacing between the first current stabilization cover 110 and the second current stabilization cover 120.
Preferably, the first driving mechanism 132 is connect with spacing adjusting bracket 131 by transmission parts 133, transmission parts
133 include transmission belt or transmission chain.
As shown in Fig. 3 a to 3d, the first driving mechanism 132 can pass through transmission belt or transmission chain with spacing adjusting bracket 131
Connection, transmission belt can be the kind of drive of gear and conveyer belt, be also possible to the kind of drive of transmission chain and gear, the structure
With preferable transmission effect, and movement is more steady.It certainly, can also be using other knots in the other embodiment of the present invention
Structure realizes the first driving mechanism 132 driving the to realize that the first driving mechanism 132 drives spacing adjusting bracket 131 mobile
One current stabilization cover 110 or the second current stabilization cover 120 are mobile, wherein the first driving mechanism 132 can use motor.Gas can also be used
The driving methods such as cylinder are not intended as limiting herein.
According to another embodiment of the invention, constant-current stabilizer 100 further includes height adjustment mechanism 140, height adjustment machine
Structure 140 is connect with distance regulating mechanism 130, for driving distance regulating mechanism 130 mobile to adjust the first current stabilization cover 110 and the
Height of the two current stabilization covers 120 in the secondary furnace chamber 212 of crystal pulling furnace 200.
As shown in figure 5, height adjustment mechanism 140 is connect with distance regulating mechanism 130, height adjustment mechanism 140 can band
Dynamic distance regulating mechanism 130 moves up and down, to adjust the first current stabilization cover 110 and the second current stabilization cover 120 in crystal pulling furnace pair furnace chamber 212
Interior height, and then crystal pulling furnace is made to can adapt to the crystal bar of growth different length, improve the using flexible of crystal pulling furnace.
Preferably, height adjustment mechanism 140 can also be connect with distance regulating mechanism 130 using transmission parts 133, specifically
Structure can be found in the transmission parts 133 of above-described embodiment, details are not described herein.
According to some embodiments of the present invention, every one first current stabilization cover 110 and every one second current stabilization cover 120 are one group, surely
Flowing device 100 includes the first current stabilization of multiple groups cover 110 and the second current stabilization cover 120.
As shown in Fig. 1 e to Fig. 1 g, constant-current stabilizer 100 includes the group of the first current stabilization of multiple groups cover 110 and the second current stabilization cover 120
It closes, that is to say, that one group of first current stabilization cover 110 can be set in the secondary furnace chamber 212 of crystal pulling furnace according to the actual situation when use
With the combination of the second current stabilization cover 120, it is also possible to the combination of the first current stabilization of multiple groups cover 110 and the second current stabilization cover 120, in this way, can
Preferably to adjust the flow direction and flow velocity of the inert gas 300 in crystal pulling furnace pair furnace chamber 212 in appropriate circumstances, further mention
The using flexible of high constant-current stabilizer 100.
Optionally, the percent opening of the first current stabilization cover 110 and the second current stabilization cover 120 is 80%~95%.
That is, the percent opening of the first current stabilization cover 110 and the second current stabilization cover 120 can control 80%~95% it
Between, which can preferably control the flowing velocity of inert gas 300 and the uniformity of distribution, it is ensured that gas smooth sequential
Mobility status, wherein the percent opening of the first current stabilization cover 110 is the transversal of all first through hole 111 on the first current stabilization cover 110
The sum of area accounts for the percentage of the surface area of the periphery wall of the first current stabilization cover 110, and the percent opening of the second current stabilization cover 120 is second steady
The cross-sectional area sum of the second all through-holes 121 accounts for the percentage of the surface area of the periphery wall of the second current stabilization cover 120 on stream cover 120
Than.
Further, the cross section of first through hole 111 and the second through-hole 211 be round, rectangular, triangle or it is a variety of mix
It closes.
As shown in Fig. 2 a to 2e, the shape of the cross section of first through hole 111 and the second through-hole 211 can be according to the actual situation
It is set, different shapes and size will affect percent opening, therefore, can select round, triangle according to the actual situation
Shape, rectangular or other shapes, also can choose several shape blendings be used to ensure that percent opening control 80%~95%,
In, the shape of the cross section in hole is not intended as limiting.
In a preferred embodiment of the invention, the cross section of first through hole 111 and the second through-hole 211 is circle, the
The pore diameter range of one through-hole 111 and the second through-hole 211 is between 5~20mm.
That is, the size in the aperture in the present invention may be limited in certain range, pass through the big of control aperture
It is small to may insure percent opening, it is preferable that when the cross section of first through hole 111 and the second through-hole 211 is round, pore diameter range control
System is between 5~20mm, preferably to control the flow direction and flow velocity of air-flow.It certainly, can also be in the other embodiment of the present invention
According to the size of the first current stabilization cover 110 and the surface area of the second current stabilization cover 120 adjustment first through hole 111 appropriate and the second through-hole
The shape of 120 cross section and the size in aperture, are not intended as limiting herein.
In short, constant-current stabilizer 100 according to an embodiment of the present invention, it can be to the inertia for being passed through the secondary furnace chamber 212 of crystal pulling furnace 200
The flow direction of gas 300 is combed, and keeps gas flow more orderly, can reduce the disorderly of the inert gas 300 in secondary furnace chamber 212
Intensity of flow constrains 300 flow direction of inert gas, and the swing of silicon single crystal rod, facilitates silicon single crystal rod caused by reducing because of air-flow
With melting liquid level steady contact, reduce crystal growth dislocation phenomena such as odds, improve the production efficiency of silicon single crystal rod,
The impurity 400 that main furnace chamber 211 can be reduced is carried by sinuous flow to secondary furnace chamber 212, avoids impurity 400 to crystal bar and thermal field portion
The problems such as part side wall is polluted and is corroded.Meanwhile between adjustable first current stabilization cover 110 and the second current stabilization cover 120 between
Away from the further flow velocity for adjusting air-flow and ensure that the steady of air-flow, adjustable first current stabilization cover 110 and the second current stabilization cover 120 exist
Height in secondary furnace chamber 212 is adapted to the crystal bar of growth different length, improves the flexibility that constant-current stabilizer 100 uses.
As shown in Figure 1 and Figure 5, the crystal pulling furnace 200 of the embodiment of the present invention, including furnace body 210, interior furnace body 210 includes main furnace
Room 211 and the secondary furnace chamber 212 being connected with main furnace chamber 211, secondary furnace chamber 212 are equipped with the constant-current stabilizer 100 such as above-described embodiment.
That is, constant-current stabilizer 100 is arranged in the secondary furnace chamber 212 of crystal pulling furnace 200, when current stabilization, inert gas 300 from
The upper end of secondary furnace chamber 212 flows into, and successively passes through the first current stabilization cover 110, the second current stabilization cover 120, the guide shell 213 of main furnace chamber 211,
After the first current stabilization cover 110 and the second current stabilization cover 120, flow direction is changed inert gas 300, keeps air-flow more orderly,
After inert gas 300 by changed course enters main furnace chamber 211, the flowing of the flowing smooth sequential of air-flow reduces inert gas
300 air turbulence phenomenon can reduce list when the air-flow flows to silicon single crystal rod surface by the guide shell 213 of main furnace chamber 211
Crystalline silicon rod facilitates silicon single crystal rod and melts the steady contact of liquid level, reduce crystal growth position because of the amplitude of fluctuation of airflow influence
Phenomena such as wrong occurrence probability, improve the production efficiency of silicon single crystal rod, the impurity 400 that can reduce main furnace chamber 211 is taken by sinuous flow
Band is conducive to impurity 400 and is discharged out of main furnace chamber in time, avoid impurity 400 to crystal bar and thermal field component to secondary furnace chamber 212
The problems such as side wall is polluted and is corroded.
Preferably, constant-current stabilizer 100 further includes distance regulating mechanism 130, steady for adjusting the first current stabilization cover 110 and second
For stream cover the distance between 120 to expand current stabilization section, one end of the first current stabilization cover 110 and the second current stabilization cover 120 passes through secondary furnace chamber
212 furnace body, and one end of the first current stabilization cover 110 and/or one end of the second current stabilization cover 120 are connect with distance regulating mechanism 130.
That is, one end of the first current stabilization cover 110 and the second current stabilization cover 120 can pass through the furnace wall of secondary furnace chamber 212, and
It is connected with distance regulating mechanism 130, the one end for being also possible to one end either the second current stabilization cover 120 of the first current stabilization cover 110 is worn
The furnace wall for crossing secondary furnace chamber 212 is connect with distance regulating mechanism 130, and then realizes distance regulating mechanism 130 to the first current stabilization cover 110
And the adjustment of the second spacing between current stabilization cover 120.Certainly, it in the other embodiment of the present invention, can also use, spacing is adjusted
One end of mechanism 130 passes through the furnace wall of secondary furnace chamber 212 and connect with the first current stabilization cover 110 and/or the second current stabilization cover 120, herein
It is not intended as limiting.
Preferably, distance regulating mechanism 130 includes spacing adjusting bracket 131 and the first driving mechanism 132, and spacing adjusts branch
One end of frame 131 is connected with the first current stabilization cover 110 and the second current stabilization cover 120 respectively, alternatively, spacing adjusting bracket and the first current stabilization
One end of cover or the connection of one end of the second current stabilization cover, the connection of the first driving mechanism 132 and spacing adjusting bracket 131, for driving
Dynamic spacing adjusting bracket 131 draw close to each other or away from adjust between the first current stabilization cover 110 and the second current stabilization cover 120 away from
From.
That is, can be set by spacing adjusting bracket 131 in the outside of secondary furnace chamber, the first current stabilization cover 110 and/or
The furnace wall that second current stabilization cover, 120 one end passes through secondary furnace chamber is connect with spacing adjusting bracket, and the first driving mechanism 132 is adjusted with spacing
Bracket 131 is connected, and the first driving mechanism drives the movement of spacing adjusting bracket so that the first current stabilization cover 110 and the second current stabilization cover 120
It is moved up and down in secondary furnace chamber 212, and then controls the spacing between the first current stabilization cover 110 and the second current stabilization cover 120, with better
It realizes to the flow direction of inert gas and the control of flow velocity, such as above-described embodiment, it is steady by height adjustment mechanism adjustable first
The height of stream cover 110 and the second current stabilization cover 120 in secondary furnace chamber 212 improves crystal pulling with the crystal bar of Adaptable growth different length
The using flexible of furnace.
Constant-current stabilizer 100 in the present invention, using the constant-current stabilizer 100 of above-described embodiment, due in above-described embodiment
The structure and technical effect of constant-current stabilizer 100 is described in detail, therefore, the other specific structures and effect of constant-current stabilizer please join
See the constant-current stabilizer 100 in above-described embodiment, details are not described herein.
Crystal pulling furnace 200 of the invention, it is possible to reduce because of the swing of silicon single crystal rod caused by air-flow, facilitate silicon single crystal rod with
Phenomena such as melting the steady contact of liquid level, reducing crystal growth dislocation odds, improves the production efficiency of silicon single crystal rod, can
It is carried by sinuous flow to secondary furnace chamber 212 with reducing the impurity 400 of main furnace chamber 211, avoids impurity 400 to crystal bar and thermal field component
The problems such as side wall is polluted and is corroded.
Unless otherwise defined, technical term or scientific term used in the present invention are should be in fields of the present invention
The ordinary meaning that personage with general technical ability is understood." first ", " second " used in the present invention and similar word
It is not offered as any sequence, quantity or importance, and is used only to distinguish different component parts." connection " or " connected "
It is not limited to physics or mechanical connection etc. similar word, but may include electrical connection, either directly
Or it is indirect."upper", "lower", "left", "right" etc. are only used for indicating relative positional relationship, when the absolute position for being described object
After setting change, then the relative positional relationship also correspondingly changes.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (13)
1. a kind of constant-current stabilizer is applied to crystal pulling furnace characterized by comprising
First current stabilization cover, the first current stabilization cover are equipped with multiple first through hole, and the first current stabilization cover is described for being mounted on
In the secondary furnace chamber of crystal pulling furnace, to adjust the flow direction for being passed through the indoor inert gas of crystal pulling furnace pair furnace；
Second current stabilization cover, the second current stabilization cover are equipped with multiple second through-holes, and the second current stabilization cover is described for being mounted on
It in the secondary furnace chamber of crystal pulling furnace, and is oppositely arranged with the first current stabilization cover, for adjusting after the first current stabilization cover adjustment
The inert gas flow direction.
2. constant-current stabilizer according to claim 1, which is characterized in that the first current stabilization cover is formed as one end wide opening, separately
The funnel type of one end slot, the first current stabilization cover is used to rectify the inert gas being passed through in the crystal pulling furnace, described
Inert gas is flowed into from the wide mouth end of the first current stabilization cover, the outflow of slot end；
The second current stabilization cover is formed as one end wide opening, the funnel type of other end slot, the slot end of the second current stabilization cover with
The slot end of the first current stabilization cover is oppositely arranged, and the second current stabilization cover is for uniform to the inert gas after rectification
It shunts.
3. constant-current stabilizer according to claim 1, which is characterized in that further include:
Distance regulating mechanism, for adjusting the distance between the first current stabilization cover and the second current stabilization cover to expand stabilization area
Between.
4. constant-current stabilizer according to claim 3, which is characterized in that the distance regulating mechanism includes:
Spacing adjusting bracket is connect with the first current stabilization cover and the second current stabilization cover respectively, alternatively, the spacing adjusts branch
Frame is connect with the first current stabilization cover or the second current stabilization cover；
First driving mechanism is connect with the spacing adjusting bracket, for driving the spacing adjusting bracket, makes the spacing tune
Section bracket drives the first current stabilization cover and the second current stabilization cover to draw close or deviate to each other.
5. constant-current stabilizer according to claim 4, which is characterized in that first driving mechanism and the spacing adjust branch
Frame is connected by transmission parts, and the transmission parts include transmission belt or transmission chain.
6. constant-current stabilizer according to claim 4, which is characterized in that further include:
Height adjustment mechanism is connect with the distance regulating mechanism, for driving the distance regulating mechanism mobile to adjust
It states the first current stabilization cover and second current stabilization covers on the indoor height of secondary furnace of the crystal pulling furnace.
7. constant-current stabilizer according to claim 1, which is characterized in that each first current stabilization cover and each described second
Current stabilization cover is one group, and the constant-current stabilizer includes multiple groups the first current stabilization cover and the second current stabilization cover.
8. constant-current stabilizer according to claim 1, which is characterized in that the first current stabilization cover and the second current stabilization cover
Percent opening is 80%~95%.
9. constant-current stabilizer according to claim 1, which is characterized in that the first through hole is transversal with second through-hole
Face is round, rectangular, triangle or a variety of mixing.
10. constant-current stabilizer according to claim 9, which is characterized in that the cross of the first through hole and second through-hole
Section is round, and the pore diameter range of the first through hole and the second through-hole is between 5~20mm.
11. a kind of crystal pulling furnace, which is characterized in that include main furnace chamber including furnace body, in the furnace body and be connected with the main furnace chamber
Logical secondary furnace chamber, the pair furnace chamber are equipped with such as the described in any item constant-current stabilizers of claim 1-10.
12. crystal pulling furnace according to claim 11, which is characterized in that the constant-current stabilizer includes distance regulating mechanism, is used
In adjusting the distance between the first current stabilization cover and the second current stabilization cover to expand current stabilization section；
One end of the first current stabilization cover and the second current stabilization cover passes through the furnace body of the secondary furnace chamber, and the first current stabilization cover
One end and/or one end of the second current stabilization cover connect with the distance regulating mechanism.
13. crystal pulling furnace according to claim 12, which is characterized in that the distance regulating mechanism includes:
Spacing adjusting bracket, the spacing adjusting bracket connect with one end of the first current stabilization cover and the second current stabilization cover respectively
It connects, alternatively, the spacing adjusting bracket is connect with one end of one end of the first current stabilization cover or the second current stabilization cover；
First driving mechanism is connect with the spacing adjusting bracket, for driving the spacing adjusting bracket movement so that described
First current stabilization cover and second current stabilization cover in the secondary furnace chamber to bringing together or deviate from.
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| CN110158154B (en) | 2021-04-02 |
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