CN205035490U - A thermal field structure for draing zone -melting 8 -12 cun silicon single crystal - Google Patents
A thermal field structure for draing zone -melting 8 -12 cun silicon single crystal Download PDFInfo
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- CN205035490U CN205035490U CN201520811484.8U CN201520811484U CN205035490U CN 205035490 U CN205035490 U CN 205035490U CN 201520811484 U CN201520811484 U CN 201520811484U CN 205035490 U CN205035490 U CN 205035490U
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- 239000013078 crystal Substances 0.000 title claims abstract description 32
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 27
- 239000010703 silicon Substances 0.000 title claims abstract description 27
- 238000004857 zone melting Methods 0.000 title abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 238000002844 melting Methods 0.000 claims abstract description 20
- 230000008018 melting Effects 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 12
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 239000010937 tungsten Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008646 thermal stress Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
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- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The utility model provides a thermal field structure for draing zone -melting 8 -12 cun silicon single crystal, including closed angle coil, well thermal shielding and lower thermal shielding, the closed angle coil lies in the melting zone department between furnace body polycrystal bar and the single crystal bar, the closed angle coil is a circular coil, and the center department of circular coil is provided with the coil eye, the circular coil outer fringe with it uses the circular coil center to be the coil seam that the circumference distributes as the starting point to be provided with a plurality of between the coil eye, coil between two adjacent coils seam forms the closed angle step, be provided with annular steel sheet in the furnace body, the steel sheet upper end is fixed with well thermal shielding, the steel sheet lower extreme is fixed with down the thermal shielding. A thermal field structure for draing zone -melting 8 -12 cun silicon single crystal pass through the setting of closed angle coil, but the intensifier coil can reduce the coil power to the material ability of changing of raw materials, avoid or reduce because of the high crystal pulling waist type that results in of power poor, through well thermal shielding and the setting of thermal shielding down, the possibility of the low dislocation production of degradable.
Description
Technical field
The utility model belongs to silicon single crystal manufacturing apparatus field, especially relates to a kind of thermal field structure melting 8-12 cun of silicon single-crystal for drawing district.
Background technology
Zone melting method growing single-crystal silicon is the state-of-the-art utilisation technology of current manufacture order crystal silicon, therefore middle and high end power electronic devices is applied to, along with the development of power electronic devices, ever-larger diameters becomes inexorable trend, but along with the increase of zone-melted silicon single crystal diameter, following problem may be there is: first stock diameter increases, the corresponding increase of power of required producer, thus cause the probability of ionization puncture to increase, and material loading material is uneven or material loading goes out to sting probability increase; Secondly thermal stresses increases, and causing dislocation to produce probability increases; In growing by zone melting furnace gas and melt, convection velocity increases again, easily produces temperature fluctuation, causes interface free energy fluctuation and produces dislocation.
Prior art is generally by adding magnetic field, add the thermal stress issues that tore of reflection controls large diameter zone melting silicon single crystal between coil and heat-preservation cylinder simultaneously, thus reduce the probability of dislocation generation, but, the difficult problem of material of large diameter zone melting silicon single crystal is resolved not yet, does not also obviously reduce the thermal stresses of zone-melted silicon single crystal simultaneously.
Summary of the invention
In view of this, the utility model is intended to propose a kind of thermal field structure melting 8-12 cun of silicon single-crystal for drawing district that can improve the difficult problem of large diameter zone melting silicon single crystal material simultaneously and produce with reduction monocrystalline stress, minimizing dislocation.
For achieving the above object, the technical solution of the utility model is achieved in that
Melting a thermal field structure for 8-12 cun of silicon single-crystal for drawing district, comprising wedge angle coil, middle heat shielding and lower heat shielding, the melting zone place of described wedge angle coil in body of heater between polycrystalline bar and monocrystalline bar, described wedge angle coil is a circular coil, the center of described circular coil is provided with through hole, described through hole is called coil eye, be provided with the some coils circumferentially distributed for starting point with circular coil center between described circular coil outer rim and described coil eye to stitch, described coil seam comprises a main seam and some secondary seams, described main seam one end is connected with described coil eye, the described main seam the other end extends to the outer rim place of described circular coil, the length being shorter in length than described main seam of described pair seam, described pair seam one end is connected with described coil eye, the described pair seam the other end does not extend to the outer rim place of wedge angle coil, it is the wedge angle step that a rectangle is connected with a trilateral that coil between described adjacent two coil seams forms vertical section, the side of described rectangle is connected with described leg-of-mutton base, and described rectangle is connected with described trilateral, the length on limit is equal, doughnut-shaped steel plate is provided with in described body of heater, described doughnut-shaped steel plate is positioned at outside described monocrystalline bar, and described steel plate upper end is fixed with middle heat shielding, and described middle heat shielding is a cylindrical tube, described steel plate lower end is fixed with lower heat shielding, and described lower heat shielding is the conical shell that a diameter reduces from top to bottom gradually.
Further, the diameter of described wedge angle coil is 160-300mm.
Further, the number of described pair seam is 3, and the width of described pair seam is 1-2mm, and the width of described main seam is 1-3mm.
Further, described trilateral is isosceles triangle, the bottom side length 1-5mm of described isosceles triangle, and height is 1-3mm.
Further, described steel plate upper end is provided with securing for described middle heat shielding protruding screw, and described steel plate lower end is provided with the screw described lower heat shielding sling.
Further, the material that described middle heat shielding adopts is tungsten or molybdenum, and the material that described lower heat shielding adopts is tungsten or molybdenum.
Further, described middle heat shielding comprises 1-10 layer, and thickness in monolayer is 0.5-2mm, and spacing is between layers 2-5mm.
Further, the inner diameter of described middle heat shielding is 250-500mm, is highly 100-300mm.
Further, described lower heat shielding comprises 1-5 layer, and thickness in monolayer is 0.5-2mm, and spacing is between layers 2-5mm.
Further, the end opening inner diameter of described lower heat shielding is 250-300mm, and inner diameter suitable for reading is 300-400mm.
Relative to prior art, the thermal field structure melting 8-12 cun of silicon single-crystal for drawing district described in the utility model has following advantage:
(1) setting of wedge angle coil, on the one hand can intensifier coil to the material ability of raw material, avoid raw material to go out the phenomenons such as thorn, another aspect can reduce coil power, avoids or reduces the probability that the crystal pulling waist type caused because power is high is poor, puncture the problems such as sparking;
(2) setting of heat shielding and lower heat shielding in, the thermograde increase can avoided on the one hand or reduce silicon single-crystal directly to increase and cause, and then thermal stresses in monocrystalline can be reduced, reduce the possibility that dislocation produces, or reduce monocrystalline cracking; On the other hand, the gaseous exchange of crystal pulling process can be melted in upgrading area, reduce because of gaseous exchange fluctuation, the temperature fluctuation caused, and then the dislocation or the disconnected bud of disconnected rib that temperature fluctuation causes can be reduced.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the front view of the utility model wedge angle coil;
Fig. 3 is the vertical view of the utility model wedge angle coil;
Fig. 4 is the structural representation of heat shielding in the utility model, lower heat shielding and steel plate.
Description of reference numerals:
1-wedge angle coil, 11-coil eye, 12-wedge angle step, the main seam of 13-, 14-pair seam, heat shielding in 2-, heat shielding under 3-, 4-steel plate, 5-monocrystalline bar, 6-polycrystalline bar.
Embodiment
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As Figure 1-4, a kind of thermal field structure melting 8-12 cun of silicon single-crystal 5 for drawing district, comprises wedge angle coil 1, middle heat shielding 2 and lower heat shielding 3;
The melting zone place of described wedge angle coil 1 in body of heater between polycrystalline bar 6 and monocrystalline bar 5, described polycrystalline bar 6 is positioned at stove internal upper part, described monocrystalline bar 5 is positioned at the below of described polycrystalline bar, described wedge angle coil 1 is a circular coil, the diameter of described circular coil is 160-300mm, the center of described circular coil is provided with coil eye 11, be provided with four coils circumferentially distributed for starting point with circular coil center between described circular coil outer rim and described coil eye 11 to stitch, described coil seam comprises a main seam 13 and three secondary seams 14, described main seam 13 one end is connected with described coil eye 11, described main seam 13 the other end extends to the outer rim place of described circular coil, the width of described main seam 13 is 1-3mm, the length being shorter in length than described main seam 13 of described pair seam 14, described pair seam 14 one end are connected with described coil eye 11, described pair seam 14 the other ends do not extend to the outer rim place of wedge angle coil 1, the width of described pair seam 14 is 1-2mm, the setting of described coil seam can reduce coil power, to avoid or to reduce the crystal pulling waist type caused because power is high poor, puncture the probability of the problems such as sparking,
It is the wedge angle step 12 that a rectangle is connected with an isosceles triangle that coil between described adjacent two coil seams forms vertical section, the side of described rectangle is connected with the base of described isosceles triangle, and described rectangle is equal with the connected edge lengths of described isosceles triangle, the summit of described some isosceles triangles forms the edge of described coil eye 11, the base of described isosceles triangle is connected to form a circumference, the radius of described circumference is less than or equal to the length of described pair seam 14, the bottom side length 1-5mm of described isosceles triangle, height is 1-3mm, the setting of wedge angle step 12 can intensifier coil to the material ability of raw material, raw material is avoided to go out the phenomenons such as thorn,
Doughnut-shaped steel plate 4 is provided with in described body of heater, described doughnut-shaped steel plate 4 is positioned at outside described monocrystalline bar 5, described steel plate 4 upper end is fixed with middle heat shielding 2, described steel plate 4 upper end is provided with the securing protruding screw of described middle heat shielding 2, described middle heat shielding 2 is a cylindrical tube, the inner diameter of described middle heat shielding 2 is 250-500mm, be highly 100-300mm, the material that described middle heat shielding 2 adopts is tungsten or molybdenum, described middle heat shielding 2 comprises 1-10 layer, thickness in monolayer is 0.5-2mm, and spacing is between layers 2-5mm;
Described steel plate 4 lower end is fixed with lower heat shielding 3, described steel plate 4 lower end is provided with the screw described lower heat shielding 3 sling, described lower heat shielding 3 is the conical shell that a diameter reduces from top to bottom gradually, the end opening inner diameter of lower heat shielding 3 is 250-300mm, inner diameter suitable for reading is 300-400mm, and the material that described lower heat shielding 3 adopts is tungsten or molybdenum, and described lower heat shielding 3 comprises 1-5 layer, thickness in monolayer is 0.5-2mm, and spacing is between layers 2-5mm;
The setting of middle heat shielding 2 and lower heat shielding 3 makes intracrystalline thermal stresses greatly reduce, thus the dislocation reduced because thermal stresses causes or disconnected rib.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. melting a thermal field structure for 8-12 cun of silicon single-crystal for drawing district, it is characterized in that: comprise wedge angle coil (1), middle heat shielding (2) and lower heat shielding (3);
Described wedge angle coil (1) is positioned at the melting zone place between body of heater polycrystalline bar (6) and monocrystalline bar (5), described wedge angle coil (1) is a circular coil, the center of described circular coil is provided with through hole, described through hole is called coil eye (11), be provided with the some coils circumferentially distributed for starting point with circular coil center between described circular coil outer rim and described coil eye (11) to stitch, described coil seam comprises a main seam (13) and some secondary seams (14), described main seam (13) one end is connected with described coil eye (11), described main seam (13) the other end extends to the outer rim place of described circular coil, the length being shorter in length than described main seam (13) of described pair seam (14), described pair seam (14) one end is connected with described coil eye (11), described pair seam (14) the other end does not extend to the outer rim place of wedge angle coil (1), it is the wedge angle step (12) that a rectangle is connected with a trilateral that coil between described adjacent two coil seams forms vertical section, the side of described rectangle is connected with described leg-of-mutton base, and described rectangle is connected with described trilateral, the length on limit is equal,
Doughnut-shaped steel plate (4) is provided with in described body of heater, described doughnut-shaped steel plate (4) is positioned at described monocrystalline bar (5) outside, described steel plate (4) upper end is fixed with middle heat shielding (2), described middle heat shielding (2) is a cylindrical tube, described steel plate (4) lower end is fixed with lower heat shielding (3), and described lower heat shielding (3) is the conical shell that a diameter reduces from top to bottom gradually.
2. the thermal field structure melting 8-12 cun of silicon single-crystal for drawing district according to claim 1, is characterized in that: the diameter of described wedge angle coil (1) is 160-300mm.
3. the thermal field structure melting 8-12 cun of silicon single-crystal for drawing district according to claim 1, it is characterized in that: the number of described pair seam (14) is 3, the width of described pair seam (14) is 1-2mm, and the width of described main seam (13) is 1-3mm.
4. the thermal field structure melting 8-12 cun of silicon single-crystal for drawing district according to claim 1, it is characterized in that: described trilateral is isosceles triangle, the bottom side length 1-5mm of described isosceles triangle, height is 1-3mm.
5. the thermal field structure melting 8-12 cun of silicon single-crystal for drawing district according to claim 1, it is characterized in that: described steel plate (4) upper end is provided with the securing protruding screw of described middle heat shielding (2), and described steel plate (4) lower end is provided with the screw described lower heat shielding (3) sling.
6. the thermal field structure melting 8-12 cun of silicon single-crystal for drawing district according to claim 1, it is characterized in that: the material that described middle heat shielding (2) adopts is tungsten or molybdenum, the material that described lower heat shielding (3) adopts is tungsten or molybdenum.
7. the thermal field structure melting 8-12 cun of silicon single-crystal for drawing district according to claim 1, is characterized in that: described middle heat shielding (2) comprises 1-10 layer, and thickness in monolayer is 0.5-2mm, and spacing is between layers 2-5mm.
8. the thermal field structure melting 8-12 cun of silicon single-crystal for drawing district according to claim 1, is characterized in that: the inner diameter of described middle heat shielding (2) is 250-500mm, is highly 100-300mm.
9. the thermal field structure melting 8-12 cun of silicon single-crystal for drawing district according to claim 1, is characterized in that: described lower heat shielding (3) comprises 1-5 layer, and thickness in monolayer is 0.5-2mm, and spacing is between layers 2-5mm.
10. the thermal field structure melting 8-12 cun of silicon single-crystal for drawing district according to claim 1, is characterized in that: the end opening inner diameter of described lower heat shielding (3) is 250-300mm, and inner diameter suitable for reading is 300-400mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520811484.8U CN205035490U (en) | 2015-10-19 | 2015-10-19 | A thermal field structure for draing zone -melting 8 -12 cun silicon single crystal |
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| CN201520811484.8U CN205035490U (en) | 2015-10-19 | 2015-10-19 | A thermal field structure for draing zone -melting 8 -12 cun silicon single crystal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108193262A (en) * | 2016-12-08 | 2018-06-22 | 有研半导体材料有限公司 | A kind of reflector for being used to draw study on floating zone silicon |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108193262A (en) * | 2016-12-08 | 2018-06-22 | 有研半导体材料有限公司 | A kind of reflector for being used to draw study on floating zone silicon |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181101 Address after: 300384 Tianjin Binhai New Area high tech Zone Huayuan Industrial Area (outside the ring) Hai Tai Road 12 Patentee after: TIANJIN ZHONGHUAN ADVANCED MATERIAL TECHNOLOGY Co.,Ltd. Address before: 300384 Tianjin Binhai New Area high tech Zone Huayuan Industrial Park (outside the ring) Hai Tai Road 12 Patentee before: TIANJIN HUANOU SEMICONDUCTOR MATERIAL TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191231 Address after: 214200 Dongfen Avenue, Yixing Economic and Technological Development Zone, Wuxi City, Jiangsu Province Co-patentee after: TIANJIN ZHONGHUAN ADVANCED MATERIAL TECHNOLOGY Co.,Ltd. Patentee after: Zhonghuan leading semiconductor materials Co.,Ltd. Address before: 300384 in Tianjin Binhai high tech Zone Huayuan Industrial Zone (outer ring) Haitai Road No. 12 Patentee before: TIANJIN ZHONGHUAN ADVANCED MATERIAL TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: 214200 Dongjia Avenue, Yixing Economic and Technological Development Zone, Wuxi City, Jiangsu Province Patentee after: Zhonghuan Leading Semiconductor Technology Co.,Ltd. Country or region after: China Patentee after: TIANJIN ZHONGHUAN ADVANCED MATERIAL TECHNOLOGY Co.,Ltd. Address before: 214200 Dongjia Avenue, Yixing Economic and Technological Development Zone, Wuxi City, Jiangsu Province Patentee before: Zhonghuan leading semiconductor materials Co.,Ltd. Country or region before: China Patentee before: TIANJIN ZHONGHUAN ADVANCED MATERIAL TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |