CN202164351U - Metal organic chemical vapor deposition reactor - Google Patents
Metal organic chemical vapor deposition reactor Download PDFInfo
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- CN202164351U CN202164351U CN201120137776XU CN201120137776U CN202164351U CN 202164351 U CN202164351 U CN 202164351U CN 201120137776X U CN201120137776X U CN 201120137776XU CN 201120137776 U CN201120137776 U CN 201120137776U CN 202164351 U CN202164351 U CN 202164351U
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- Prior art keywords
- protecting sheet
- reactor drum
- protecting
- purging
- sheet
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Abstract
The utility model provides a reactor, and particularly relates to a metal organic chemical vapor deposition reactor which comprises a furnace cover, protective plates (ceiling), a deposition area, a lining support and a bottom, is provided with multiple layers of protective plates, prolongs the replaceable period of the protective plates and enhances growing stability. The multiple layers of protective plates are arranged below the furnace cover, the lining support is arranged below the protective plates, cleaned gas is communicated between the furnace cover and the protective plates by a pipeline, and a pipeline extending from the upper part of the furnace cover is communicated between the protective plates and the lining support.
Description
Technical field
The utility model relates to a kind of gas phase deposition technology, and more specifically, the utility model relates to a kind of metal organic chemical vapor deposition (MOCVD) reactor drum.
Background technology
Metal organic chemical vapor deposition (MOCVD) as the source material, utilizes vapor-phase reactant with organometallics, or the NH3 of the organo-metallic of precursor and III family and V family, reacts at the base material substrate surface, passes to base material substrate surface solid deposited thing.
MOCVD is extensively paid close attention to relevant with the rise of LED, in the growth of blue-light LED chip, generally uses the MOCVD reactive system as the growth instrument.For LED, led chip is made up of the hierarchical architecture of different semiconductor materials, and these materials are placed on the circular chip of the metal organic chemical vapor deposition system of packing into.MOCVD controls qualities such as film coating composition, crystalline phases easily, can on complex-shaped base material, substrate, form even plated film, makes MOCVD become the main coating technique of industry member.
Usually the crystal growth in the MOCVD system all is at normal pressure or the down logical H of low pressure (10-100Torr)
2Quartzy (stainless steel) reaction chamber of cold wall in carry out, underlayer temperature is 500-1200 ℃, sets off (substrate base is above graphite sets off), H with radio-frequency induction heating graphite
2Fluid supply bubbling through Controllable Temperature carries metallorganics to the vitellarium.Usually, (be generally H by the reaction source of accurate dominant discharge in carrier gas
2Perhaps N
2) carrying under feed quartzy or stainless reaction chamber, after on the substrate surface reaction taking place, grown epitaxial layer, substrate are placed on heated setting off.The residual tail gas in reaction back is scanned out reaction chamber, after removing particulate and toxic exhaust gas processing device, and the discharge system.
A MOCVD growth apparatus generally includes gas-operated system, reaction chamber, heating system and exhaust treatment system.Wherein, The gas-operated system comprises all valves, pump and various device and the pipeline that air-flow of control III family's metal organic source and V family hydride source and composition thereof is adopted, and is used for the raw-material amount that the feeding reaction chamber reacts is accurately controlled.Reaction chamber is the core integral part of MOCVD growing system, and is as shown in Figure 1, generally includes loam cake, protective cover, sedimentary province and bottom, sedimentary province comprise set off, chamber, quartz plate, ventpipe and radio frequency film etc.The manufacturer of different MOCVD equipment is also different to the design of reaction chamber; But for fear of in reaction chamber, occurring from wall jet and turbulent existence; All guarantee only to have laminar flow, thereby be implemented in air-flow and the uniform distribution of temperature in the reaction chamber, help big area and evenly grow.The reaction chamber of MOCVD equipment or Reaktionsofen are through after repeatedly growing, and the sub product that the Reaktionsofen inwall can deposit to be influenced gas flowfield, pollute reaction environment makes and must change cleaning to the parts that deposit more sub product.
For the forward and backward horizontal Reaktionsofen top board of growth, if the Reaktionsofen top cover does not have quartzy protecting sheet protection, reactant gases will react with stainless steel top cover on the one hand, and be deposited on the top cover, cause top cover to damage; The high temperature of graphite load plate will heat stainless steel top cover on the other hand, decompose stainless steel, cause the pollution to reaction environment.So the top cover of reaction chamber need cool off and isolate with chemical reaction zone.Can know that protecting sheet can use other high temperature material manufacturings.
Solution commonly used is to change protecting sheet, and every 1-6 secondary growth (be exactly every day or every other day) will be changed, and cost is very high.Change protecting sheet and bring the contaminating impurity cavity easily into, influence the continuity and the stability of crystal growth.Also having a kind of solution is through Reaktionsofen self purging method, such as high bake, feeds the corrosive gases corrosion.But high bake peels off foreign material, will pollute Reaktionsofen once more.Corrosive gases is brought other impurity on the one hand into, on the other hand because of its corrodibility meeting etching apparatus, for protection equipment further increases cost.
U.S. Pat 6309465B1 discloses a kind of horizontal Reaktionsofen, and is as shown in Figure 2, and this reaction chamber comprises outer cover with cover, is used for setting off of one or more wafer; Set off and be arranged in the reactor cover, comprise the liquid inlet of a plurality of openings, these a plurality of openings are over against above-mentioned wafer; These wafers are through the CVD medium; By mildly heating, the outward flange of reactor cover is arranged outlet, and this outlet is used for discharging the medium that is imported.Wherein, the disc of inside reactor adopts frangible quartz manufacturing, with its surface coarsening, partly adopts gas cooling with metallic contact, reduces thermal expansion stress.
U.S. Pat 2009/0064935 discloses a kind of adjustable for height protecting sheet up and down; As shown in Figure 3, this reactor drum comprises substrate, arranges a plurality of layers on the substrate; Also comprise chamber; Chamber is arranged in inside reactor, and has heatable bottom, a protecting sheet and adjustable positions to a height that sets off.Under this height, conveniently feed HCl corrosion protection plate and the growth sub product that sets off, thereby reach the purpose of cleaning activity stove.
The protecting sheet that comprises the prior art scheme of above-mentioned two applications all adopts quartzy the manufacturing, is difficult for processing, and frangible; Quartzy system protecting sheet is cleaning continuity and the stability that has influenced crystal growth in the process of utilizing repeatedly; Cleaning process causes the corrosion to quartz easily simultaneously; Protecting sheet can adhere to the foreign material of crystal growth sub product after crystal growth one is taken turns; If stick not firmly, can drop in the Reaktionsofen, influence crystal growth.
The utility model content
For overcoming above-mentioned defective of the prior art, the utility model proposes a kind of metal organic chemical vapor deposition (MOCVD) reactor drum.
First aspect according to the utility model; A kind of MOCVD reactor drum is provided, comprises bell, protecting sheet, sedimentary province and set off, it is characterized in that; The bell below is the multiwalled protecting sheet; Protecting sheet below is to set off, and arranges the pipeline that is connected with Purge gas between bell and the protecting sheet, protecting sheet and set off between arrange pipeline that extend from the bell top, through growth gasses; Multilayer protecting sheet stack, the thickness of every layer of protecting sheet or area are different, and the substrate of graphite flake is set below the protecting sheet, arrange the pipeline that is connected with purified gas between protecting sheet and the graphite; Vertical direction at the plate face of multilayer protecting sheet is provided with the purging pore.
Spacing sets up standard between the layer of protecting sheet and the layer.
The thickness of the protecting sheet of each layer is 0.1-3mm, and lower floor's protecting sheet is as thin as after each growth, directly to peel off and abandons.
Around the growth gasses inlet mouth of protecting sheet, one or more purges pore irregular layout; Perhaps around a plurality of equidistant purging pores of this inlet mouth circular permutation.
The purging pore of the ring shooting on the protecting sheet is arranged on the air-flow upper reaches near Wafer load plate place, purges to form through gaseous purge stream to have less sedimentary radial zone.
Undersized plating SiC graphite flake is set under the protecting sheet, and graphite flake leaves the space with the protection plate, supplies gaseous purge stream to pass through as purging pore.
Between graphite substrate and protecting sheet, arrange shutter.
The utility model is established the multilayer protecting sheet, prolongs the replacement cycle of protecting sheet, improves growth stability.The stack of multilayer protecting sheet is placed in the Reaktionsofen, removes the orlop protecting sheet and will can not bring impurity into, does not influence the quality of crystal growth, and many wheels crystal growth is continuously enhanced productivity.
The quartz system protecting sheet of the utility model is provided with the purging pore, prolongs the replacement cycle of the quartzy system of monolithic protecting sheet, only need protecting sheet be reprocessed and the purging pore is set, and need not transform other structures of existing equipment.
The quartz system protecting sheet of the utility model is divided into graphite flake, and deposition is more on the graphite flake, and deposition is less on the quartzy system protecting sheet, can repeatedly change, thus the replacement cycle of the quartzy system of prolongation protecting sheet, graphite flake plates SiC, and is more corrosion-resistant, cleans cleaner.
Description of drawings
Fig. 1 is existing MOCVD reactor drum;
Fig. 2 is a kind of horizontal Reaktionsofen of the prior art;
Fig. 3 illustrates a kind of adjustable for height protecting sheet up and down of the prior art;
Fig. 4 illustrates the protecting sheet synoptic diagram according to first embodiment of the utility model;
Fig. 5 illustrates the protecting sheet structural representation according to second embodiment of the utility model;
Fig. 6 illustrates the layout of a plurality of purging pores;
Fig. 7 illustrates the protecting sheet structural representation according to the 3rd embodiment of the utility model;
Fig. 8 illustrates the layout of the purging pore behind the layout graphite flake.
As shown in the figure, structure or method for the embodiment that can clearly realize the utility model marked various size and angle in the drawings, but this size are merely the signal needs, are not that intention is limited to the utility model under this specific dimensions.Based on concrete needs, those of ordinary skill in the art can be with these adjusted size, modification, and adjustment of being carried out and modification still are included in the scope of accompanying Claim.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment a kind of metal organic chemical vapor deposition (MOCVD) reactor drum that the utility model provides is described in detail.
In the following description, with a plurality of different aspect of describing the utility model, yet, for those skilled in the art, can only utilize some or the entire infrastructure of the utility model or flow process to implement the utility model.For the definition of explaining, set forth specific number, configuration and order, but clearly, do not had also can to implement the utility model under the situation of these specific detail.In other cases, in order not obscure the utility model, will set forth no longer in detail for some well-known characteristics.
Generally speaking, the utility model belongs to the technological improvement to the MOCVD reactor drum, proposes a kind of new improvement project to the pollution problem of the protecting sheet of the reactor drum of MOCVD equipment.In the following description, a plurality of embodiment are provided, are used for describing layout separately, be appreciated that cognition, these different layouts can be made up in twos or all combined based on those skilled in the art for different structure.
Fig. 4 illustrates the protecting sheet synoptic diagram according to first embodiment of the utility model, and left side figure is old design.With reference to figure 1 and Fig. 4, the reactor drum of the utility model comprises bell, protecting sheet (ceiling), sedimentary province, sets off and the bottom, for existing reactors; The quartz plate that uses thicker individual layer is as protecting sheet, but in actual motion, high temperature is changed complicated down; Cost is high, and the washing consume is big.In the application's embodiment, protecting sheet is set to the multiwalled protecting sheet, thereby prolongs the replacement cycle of protecting sheet, improves growth stability.As shown in Figure 4; The reactor drum of the application's first embodiment comprises bell, and the bell below is the multiwalled protecting sheet, and the protecting sheet below is to set off; Arrange pipeline between bell and the protecting sheet; Be used for being connected with Purge gas, protecting sheet and set off between arrange the pipeline that extends from the bell top, be used for through growth gasses.
Wherein, the stack of multilayer protection plate is kept somewhere the space between layer and the layer, supplies sweeping gas to purge cooling, and the orlop protecting sheet gets final product fast Demolition after can't being suitable for growth.
Further, the specification of every layer of protection plate is identical.In addition, the thickness of these protecting sheets or area can be different.The spacing that can set up standard between the layer of protecting sheet and the layer supplies sweeping gas to purge and cools off.Orlop protection plate can't grow remove after, the protection plate on upper strata moves down, and keeps the invariant position of below of protecting sheet.
The thickness of the protecting sheet of each layer can be approximately 0.1-3mm or thinner, and lower floor's protecting sheet can be as thin as after each growth, directly to peel off and abandon.The stack of multilayer protecting sheet is placed in the Reaktionsofen, removes the orlop protecting sheet and will can not bring impurity into, does not influence the quality of crystal growth, and the crystal growth of many wheels continuously, enhances productivity.
As shown in Figure 4; The first layer protecting sheet significantly is thicker than the protecting sheet of other each layers; And be not crucial point in proportion among the figure, those skilled in the art are appreciated that the thickness of the first layer protecting sheet generally can be several times or tens of times of other each layer protecting sheet thickness.
Further, the vertical direction at the plate face of multilayer protecting sheet is provided with the purging pore.This purging pore can be arranged on protecting sheet the growth gasses inlet mouth around, can irregular layout one or more purge pore, perhaps around a plurality of equidistant purging pores of this inlet mouth circular permutation.
The purging pore of ring shooting is set on the protecting sheet, is arranged on the air-flow upper reaches near wafer (Wafer) load plate place.Through the effect of gaseous purge stream purging, form one and have less sedimentary radial zone, thus the replacement cycle of prolongation protecting sheet.Form gaseous purge stream and only need reprocess, need not transform other structures of existing equipment to protecting sheet.
Further, the substrate of graphite flake is set below the quartzy system protecting sheet, arranges the pipeline that is connected with purified gas between protecting sheet and the graphite.Wherein, plating silit (SiC) graphite flake of a slice reduced size is set under the quartzy system protecting sheet, graphite flake and protecting sheet have a fixed gap, as purging pore, supply gaseous purge stream to pass through.Have less sedimentary zone because the effect of gaseous purge stream purging forms one, make that deposition is more on the graphite flake, quartzy system protecting sheet merchant deposits less, can repeatedly change graphite flake, prolongs the replacement cycle of quartzy system protecting sheet.
Further, between graphite substrate and protecting sheet, add shutter,, can not exert an influence air-flow so that lower floor's purified gas can not pass through shutter.
In second embodiment of the utility model, as shown in Figure 5, the protecting sheet structural representation according to second embodiment of the utility model is provided.The reactor drum of the utility model comprises bell, protecting sheet (ceiling), sedimentary province, sets off and the bottom.Bell below is a protecting sheet, and the protecting sheet below is to set off, and arranges pipeline between bell and the protecting sheet, is connected with Purge gas, protecting sheet and set off between be connected with the pipeline that extends from the bell top, be used for through growth gasses.Vertical direction at the plate face of protecting sheet is provided with the purging pore.This purging pore can be arranged on protecting sheet the growth gasses inlet mouth around, can irregular layout one or more purge pore, perhaps around a plurality of equidistant purging pores of this inlet mouth circular permutation.
The purging pore of ring shooting is set on the protecting sheet, is arranged on the air-flow upper reaches near Wafer load plate place.Form one through the effect of gaseous purge stream purging and have less sedimentary radial zone, thus the replacement cycle of prolongation protecting sheet.Form gaseous purge stream and only need reprocess, need not transform other structures of existing equipment to protecting sheet.
Form one at the pore rear and run through the less sedimental zone of having of protecting sheet.Fig. 6 illustrates the layout of a plurality of purging pores, among Fig. 6, is provided with the purging pore of circular permutation, behind the purging pore of circular permutation, forms existing less sedimentary radial zone, and this zone is positioned at the load plate position of wafer.
Further, protecting sheet adopts the multiwalled protecting sheet, thereby prolongs the replacement cycle of protecting sheet, improves growth stability.The stack of multilayer protection plate is kept somewhere the space between layer and the layer, supplies sweeping gas to purge cooling, and the orlop protecting sheet gets final product fast Demolition after can't being suitable for growth.The specification of every layer of protection plate is identical, but the thickness of these protecting sheets or area can be different.The spacing that can set up standard between the layer of protecting sheet and the layer supplies sweeping gas to purge and cools off.After orlop protection plate can't be grown and removed, the protection plate on upper strata moved down, and kept the invariant position of below of protecting sheet.
The thickness of the protecting sheet of each layer can be approximately 0.1-3mm or thinner, and lower floor's protecting sheet can be as thin as after each growth, directly to peel off and abandon.The stack of multilayer protecting sheet is placed in the Reaktionsofen, removes the orlop protecting sheet and will can not bring impurity into, does not influence the quality of crystal growth, and many wheels crystal growth continuously, enhances productivity.
Further, the substrate of graphite flake is set below the quartzy system protecting sheet, arranges the pipeline that is connected with purified gas between protecting sheet and the graphite.Wherein, the plating SiC graphite flake of a slice reduced size is set under the quartzy system protecting sheet, graphite flake and protecting sheet have a fixed gap, supply gaseous purge stream to pass through as purging pore.Have less sedimentary zone because the effect of gaseous purge stream purging forms one, make that deposition is more on the graphite flake, quartzy system protecting sheet merchant deposits less, can repeatedly change graphite flake, prolongs the replacement cycle of quartzy system protecting sheet.
Further, between graphite substrate and protecting sheet, add shutter,, can not exert an influence air-flow so that lower floor's purified gas can not pass through shutter.
In the application's the 3rd embodiment, a kind of structure of reactor drum is provided, Fig. 7 illustrates the structural representation according to the reactor drum of the 3rd embodiment of the utility model.As shown in Figure 7, the reactor drum of the utility model comprises bell, protecting sheet (ceiling), sedimentary province, sets off and the bottom.Bell below is a protecting sheet, and the protecting sheet below is to set off, and arranges pipeline between bell and the protecting sheet, is connected with Purge gas, protecting sheet and set off between arrange the pipeline that extends from the bell top, be used for through growth gasses.The substrate of graphite flake is set below the quartzy system protecting sheet, arranges the pipeline that is connected with purified gas between protecting sheet and the graphite.
The plating SiC graphite flake of a slice reduced size is set under the quartzy system protecting sheet, and graphite flake and protecting sheet have a fixed gap, supply gaseous purge stream to pass through as purging pore.As shown in Figure 8, purge behind the pore and have less sedimentary zone because the effect of gaseous purge stream purging forms one, make that deposition is more on the graphite flake, quartzy system protecting sheet merchant deposits less, can repeatedly change graphite flake, prolongs the replacement cycle of quartzy system protecting sheet.Most of pollutant sediment as long as change graphite flake, can continue crystal growth on graphite flake, graphite plates SiC, and is more corrosion-resistant, cleans cleaner.
Further, between graphite substrate and protecting sheet, add shutter.
Further, the vertical direction at the plate face of protecting sheet is provided with the purging pore.This purging pore can be arranged on protecting sheet the growth gasses inlet mouth around, can irregular layout one or more purge pore, perhaps around a plurality of equidistant purging pores of this inlet mouth circular permutation.
The purging pore of ring shooting is set on the protecting sheet, is arranged on the air-flow upper reaches near Wafer load plate place.Through the effect of gaseous purge stream purging, form one and have less sedimentary radial zone, thus the replacement cycle of prolongation protecting sheet.Form gaseous purge stream and only need reprocess, need not transform other structures of existing equipment to protecting sheet.
Further, protecting sheet adopts the multiwalled protecting sheet, thereby prolongs the replacement cycle of protecting sheet, improves growth stability.The stack of multilayer protection plate, the orlop protecting sheet gets final product fast Demolition after can't being suitable for growth.The specification of every layer of protection plate is identical, but the thickness of these protecting sheets or area can be different.The spacing that can set up standard between the layer of protecting sheet and the layer supplies sweeping gas to purge and cools off.After orlop protection plate can't be grown and removed, the protection plate on upper strata moved down, and kept the invariant position of below of protecting sheet.
The thickness of the protecting sheet of each layer can be approximately 0.1-3mm or thinner, and lower floor's protecting sheet can be as thin as after each growth, directly to peel off and abandon.The stack of multilayer protecting sheet is placed in the Reaktionsofen, removes the orlop protecting sheet and will can not bring impurity into, does not influence the quality of crystal growth, and many wheels crystal growth continuously, enhances productivity.
What should explain at last is; Above embodiment only limits in order to the technical scheme of description the utility model rather than to the present technique method; The utility model can extend to other modification, variation, application and embodiment on using, and therefore thinks that all such modifications, variation, application, embodiment are in the spirit and teachings of the utility model.
Claims (7)
1. MOCVD reactor drum; Comprise bell, protecting sheet, sedimentary province and set off; It is characterized in that the bell below is the multiwalled protecting sheet, the protecting sheet below is to set off; Arrange the pipeline be connected with Purge gas between bell and the protecting sheet, protecting sheet and set off between arrange pipeline that extend from the bell top, through growth gasses; Multilayer protecting sheet stack, the thickness of every layer of protecting sheet or area are different, and the substrate of graphite flake is set below the protecting sheet, arrange the pipeline that is connected with purified gas between protecting sheet and the graphite; Vertical direction at the plate face of multilayer protecting sheet is provided with the purging pore.
2. reactor drum according to claim 1 is characterized in that, spacing sets up standard between the layer of protecting sheet and the layer.
3. reactor drum according to claim 1 is characterized in that, the thickness of the protecting sheet of each layer is 0.1-3mm, and lower floor's protecting sheet is as thin as after each growth, directly to peel off and abandons.
4. reactor drum according to claim 1 is characterized in that, around the growth gasses inlet mouth of protecting sheet, one or more purges pore irregular layout; Perhaps around a plurality of equidistant purging pores of this inlet mouth circular permutation.
5. reactor drum according to claim 4 is characterized in that, the purging pore of the ring shooting on the protecting sheet is arranged on the air-flow upper reaches near Wafer load plate place, purges to form through gaseous purge stream to have less sedimentary radial zone.
6. reactor drum according to claim 1 is characterized in that, undersized plating SiC graphite flake is set under the protecting sheet, and graphite flake leaves the space with the protection plate, supplies gaseous purge stream to pass through as purging pore.
7. reactor drum according to claim 6 is characterized in that, between graphite substrate and protecting sheet, arranges shutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120137776XU CN202164351U (en) | 2011-05-04 | 2011-05-04 | Metal organic chemical vapor deposition reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120137776XU CN202164351U (en) | 2011-05-04 | 2011-05-04 | Metal organic chemical vapor deposition reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202164351U true CN202164351U (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120137776XU Expired - Lifetime CN202164351U (en) | 2011-05-04 | 2011-05-04 | Metal organic chemical vapor deposition reactor |
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| CN (1) | CN202164351U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561929A (en) * | 2015-01-08 | 2015-04-29 | 厦门市三安光电科技有限公司 | MOCVD (Metal Organic Chemical Vapor Deposition) reaction system |
-
2011
- 2011-05-04 CN CN201120137776XU patent/CN202164351U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561929A (en) * | 2015-01-08 | 2015-04-29 | 厦门市三安光电科技有限公司 | MOCVD (Metal Organic Chemical Vapor Deposition) reaction system |
| CN104561929B (en) * | 2015-01-08 | 2017-04-19 | 厦门市三安光电科技有限公司 | MOCVD (Metal Organic Chemical Vapor Deposition) reaction system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120314 |
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| CX01 | Expiry of patent term |