CN212834019U - Chemical source leading-in system of atomic layer deposition coating equipment - Google Patents
Chemical source leading-in system of atomic layer deposition coating equipment Download PDFInfo
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- CN212834019U CN212834019U CN202021516756.9U CN202021516756U CN212834019U CN 212834019 U CN212834019 U CN 212834019U CN 202021516756 U CN202021516756 U CN 202021516756U CN 212834019 U CN212834019 U CN 212834019U
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Abstract
The utility model belongs to the technical field of the film preparation technique and specifically relates to a chemical source import system of atomic layer deposition coating equipment, chemical source import system includes a plurality of chemical source import pipelines and valve seat bottom plate, a plurality of chemical source import pipelines pass through gas import flange and install on the valve seat bottom plate, be provided with valve seat bottom plate heater on the valve seat bottom plate, be located the gas import flange vacuum side the periphery of chemical source import pipeline is provided with the vacuum side heater in addition; the valve seat bottom plate heater and the vacuum side heater jointly heat the chemical source introducing pipeline in multiple sections. The utility model has the advantages that: the simultaneous introduction of a plurality of chemical sources is realized, and condensation is not caused; each chemical source is subjected to multi-stage heating, so that the time of the process cycle is further shortened; the film forming effect of the atomic layer deposition film coating process is ensured, the problem that the product has film forming particles is avoided, and the product quality is improved.
Description
Technical Field
The utility model belongs to the technical field of the film preparation technique and specifically relates to a chemical source import system of atomic layer deposition coating equipment.
Background
As a technical means of a more common coating, an Atomic Layer Deposition (ALD) process generally includes the following reaction processes: 1) the reaction precursor enters the reaction cavity in a pulse mode and is chemically adsorbed on the surface of the substrate; 2) after the surface adsorption is saturated, using inert gas to blow the redundant reaction precursor out of the reaction cavity; 3) the second chemical precursor enters the reaction cavity in a pulse mode and reacts with the precursor chemically adsorbed on the surface last time; 4) and after the reaction is completed, blowing the redundant precursor and the by-product out of the reaction cavity by using inert gas.
At present, chemical sources used by atomic layer deposition coating machines are usually liquid at normal temperature, so that the chemical sources need to be heated into gas chemical sources and then introduced into a reaction chamber, and then the gas chemical sources react on a substrate to form a thin film. In the process of introducing the chemical source into the reaction chamber, the chemical source is heated on introduction paths such as an atmosphere side and a vacuum side; the chemical source is prevented from condensing in the conveying process; it is desirable to minimize the possibility that different chemical sources do not react until they reach the substrate, and to achieve timely introduction of the chemical sources strictly in accordance with the process requirements. At present, a chemical source leading-in system of atomic layer deposition coating equipment has the following problems: the chemical source gas introduction is less in variety; the chemical source is easy to form a film at the position of a conveying pipeline and the like in the introducing process, thereby causing the quality reduction of a film product, and the like.
Disclosure of Invention
The utility model aims at providing a chemical source bootstrap system of atomic layer deposition coating equipment according to the not enough of above-mentioned prior art, designing the structure of bootstrap system, sweep pipeline, cooperation multistage heating and distribute the chemical gas input port in the position of difference through the increase, effectively improve product quality to shorten the required cycle time of atomic layer deposition coating process.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
a chemical source leading-in system of atomic layer deposition coating equipment is used for leading a chemical source into a vacuum coating chamber and is characterized in that: the chemical source leading-in system comprises a plurality of chemical source leading-in pipelines and a valve seat bottom plate, the chemical source leading-in pipelines are installed on the valve seat bottom plate through gas leading-in flanges, a valve seat bottom plate heater is arranged on the valve seat bottom plate, and a vacuum side heater is additionally arranged on the periphery of the chemical source leading-in pipeline positioned on the vacuum side of the gas leading-in flanges; the valve seat bottom plate heater and the vacuum side heater jointly heat the chemical source introducing pipeline in multiple sections.
Each chemical source leading-in pipeline is provided with a gas purging pipeline, and the chemical source leading-in pipeline and the gas purging pipeline share one outlet in the vacuum coating chamber on the vacuum side of the gas leading-in flange.
The chemical source introducing system comprises an independent gas purging pipeline; in the vacuum coating chamber, the outlet of the independent gas purging pipeline and the outlet of the conveying pipeline of any chemical source introducing pipeline are mutually independent; the independent gas purging line is used for performing continuous purging to control the gas flow direction of the chemical source introduction line when introducing the chemical source.
And the periphery of the chemical source leading-in pipelines positioned on the vacuum side of the gas leading-in flange is surrounded by a heat-insulating barrel, and the vacuum side heater is positioned in the heat-insulating barrel.
The material of heat-preserving container contains aluminium element.
The valve seat bottom plate is made of aluminum elements.
The chemical source introducing pipelines have different extending lengths in the vacuum coating chamber positioned on the vacuum side of the gas introducing flange, namely the conveying pipeline outlets of the chemical source introducing pipelines are staggered.
And the chemical source leading-in pipeline is provided with a leading-in dosage valve.
The chemical source leading-in system further comprises a vacuum gauge, wherein a vacuum degree detection end of the vacuum gauge is arranged in the vacuum coating chamber on the vacuum side of the gas leading-in flange, and the vacuum gauge is used for monitoring the pressure behind the leading-in dosage valve so as to judge the sealing state of the leading-in dosage valve.
The utility model has the advantages that: the simultaneous introduction of a plurality of chemical sources is realized, and condensation is not caused; each chemical source can be heated in a multi-stage way, so that the time of the process cycle is further shortened; the film forming effect of the atomic layer deposition film coating process is ensured, the product quality problem is avoided, and the product quality is improved; protecting equipment to avoid film formation everywhere caused by diffusion of chemical hospital; the sealing state of the dosage valve can be monitored in real time, and the vacuum gauge is protected.
Drawings
FIG. 1 is a schematic front view of a valve seat bottom plate according to the present invention;
FIG. 2 is a schematic structural view of a gas introduction flange according to the present invention;
FIG. 3 is a schematic structural view of a gas introduction flange according to the present invention;
fig. 4 is a schematic view of the chemical source introduction system of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-4, reference numerals 1-14 in the drawings denote: the device comprises a valve seat bottom plate 1, a gas introduction flange 2, a chemical source introduction pipeline 3, a gas purging pipeline 4, a valve seat bottom plate heater 5, a heating rod installation pipe 6 of a vacuum side heater, a vacuum sealing position 7, an aluminum heat insulation plate 8, a cavity plate 9, a heat insulation plate 10, a fixing plate 11, an independent gas purging pipeline 12, a vacuum gauge 13 and an introduction dosage valve 14.
Example (b): in this embodiment, the chemical source introducing system of the atomic layer deposition coating apparatus is configured to introduce chemical gas in an atomic layer deposition coating process into the film forming chamber to form a film on a loaded product in the film forming chamber.
As shown in fig. 1, the main body of the chemical source introduction system in the present embodiment includes a valve seat bottom plate 1, a gas introduction flange 2, and a chemical source introduction line 3. The valve seat bottom plate 1 can be provided with chemical source introduction pipelines 3 corresponding to the number of chemical gases required by the atomic layer deposition film forming process, and the chemical source introduction pipelines 3 can be mounted on the valve seat bottom plate 1 through gas introduction flanges 2. One end of the chemical source introduction pipe 3 is arranged on the atmosphere side and connected to the chemical source supply device, and the other end thereof extends into the film forming chamber, so that the chemical gas as the chemical source is introduced into the film forming chamber through the pipe. Each chemical source lead-in pipeline 3 is connected with a gas purging pipeline 4 through a branch side, and the gas purging pipeline 4 can be connected with an inert gas supply device; the gas purging pipeline 4 is used for purging the residual chemical gas in the chemical source introduction pipeline 3 corresponding to the gas purging pipeline completely, purging the inert gas continuously, ensuring that the chemical gas in other chemical source introduction pipelines 3 cannot enter, further avoiding film formation in the pipeline to cause particles and ensuring the product quality.
As shown in fig. 4, the chemical source introduction system in the present embodiment includes three chemical source introduction lines 3 and a gas purge line 4 connected to each chemical source introduction line 3 separately and correspondingly, so that the present embodiment can achieve simultaneous introduction of three chemical sources. In a specific implementation, in addition to the three chemical sources that can be simultaneously introduced in this embodiment, if the atomic layer deposition film forming process requires different numbers of chemical sources than three (more than three or less than three), the requirement can be satisfied by arranging the chemical sources corresponding to the numbers to the pipeline 3 and the gas purging pipeline 4.
As shown in fig. 1, three valve seat bottom plate heaters 5 arranged at intervals are arranged on the valve seat bottom plate 1, and the valve seat bottom plate heaters 5 can heat the valve seat bottom plate 1, so that the chemical source introducing pipeline 3 is heated, and the chemical gas introduced by the chemical source introducing pipeline 3 is not condensed. When concrete implementation, the aluminum alloy can be chooseed for use to the material of disk seat bottom plate 1, because of the aluminum alloy has the conductivity height, characteristics that the radiance is low can guarantee that whole disk seat bottom plate 1 temperature is all comparatively even.
As shown in fig. 1, since the gas introduction flange 2 is attached to the valve seat bottom plate 1, the gas introduction flange 2 is also heated by the valve seat bottom plate heater 5 on the valve seat bottom plate, and the temperature difference between the gas introduction flange 2 and the valve seat bottom plate is kept small.
Referring to fig. 2 and 4, each of the chemical source introduction pipes 3 penetrates the gas introduction flange 2 from the atmosphere side to the vacuum side, and the chemical source introduction pipe 3 on the vacuum side is heated to a higher temperature to obtain a shorter plating cycle. An aluminum heat-insulating plate 8 is surrounded on the periphery of the portion of the chemical source introduction pipeline 3 on the vacuum side, and the aluminum heat-insulating plate 8 can be made into a barrel shape so as to completely cover each chemical source introduction pipeline 3 and ensure that the chemical source introduction pipeline is uniformly heated. An additional heater, i.e., a vacuum side heater, is further provided at the periphery of the portion of the chemical source introduction line 3 on the vacuum side, and is located at the periphery of the chemical source introduction line 3 to heat the chemical gas. The vacuum heater is installed on the gas introduction flange 2 through the heating rod installation tube 6 of the vacuum side heater, and the heating rod installation tube 6 of the vacuum side heater is welded with the gas introduction flange 2, so that good sealing performance is guaranteed, and vacuum sealing performance is guaranteed. When the heating rod mounting tube 6 of the vacuum side heater is mounted, the heating rod mounting tube is in good contact with the valve seat bottom plate heater 5; meanwhile, the precise installation and matching of the heater and the aluminum heat-insulation plate 8 are required, and the heat of the heater can be better transmitted to the aluminum heat-insulation plate 8. In specific implementation, in order to reduce heat loss of the aluminum heat-insulating plate 8, a reflecting plate is installed on the periphery of the aluminum heat-insulating plate 8. The periphery of the part of each chemical source leading-in pipeline 3 positioned on the vacuum side can be wrapped by an aluminum block, so that the chemical source leading-in pipeline has better heat preservation property. The vacuum sealing position 7 between the heating rod mounting tube 6 of the vacuum side heater and the gas introduction flange 2 should be strictly sealed to ensure the sealing performance of the vacuum side.
In the embodiment, the valve seat bottom plate heater 5 and the heater arranged on the periphery of the part, located on the vacuum side, of the chemical source introducing pipeline are combined to form multi-stage heating, so that the chemical gas is prevented from being condensed, the temperature of the chemical gas is ensured, and the cycle time of the atomic layer deposition film forming process is further shortened.
As shown in fig. 4, in addition to the three chemical source introduction lines 3 and the corresponding gas purge lines 4, the chemical source introduction system of the present embodiment further includes an independent gas purge line 12, and the independent gas purge line 12 may be connected to an inert gas supply device, so that a stable gas flow can be formed by continuous purge of inert gas, and a stable gas flow direction can be ensured. In this case, the stable gas flow can ensure that all the chemical gases introduced through the chemical source introduction line 3 have a stable and specific flow direction, and ensure that the chemical gases do not diffuse everywhere and further form a film everywhere.
As shown in fig. 4, the outlets of the delivery lines of the three chemical source introduction lines 3 have different lengths, that is, the three outlets have different lengths and are staggered, so that under the influence of the stable gas flow provided by the independent gas purge line 12, the delivery of different chemical gases is ensured to be independent, and the formation of a film everywhere is avoided.
As shown in fig. 4, a vacuum gauge 13 is further provided in the chemical source introduction system, and the vacuum gauge 13 can monitor the pressure behind the introduction dose valve 14, i.e., the vacuum side pressure, and if there is a leak in the introduction dose valve 14, the pressure indication of the vacuum gauge 13 changes. Further, by purging the inert gas through the independent gas purge line 12, the film formation on the vacuum gauge 13 can be prevented, and the vacuum gauge 13 can be protected.
In the embodiment, in specific implementation: as shown in FIG. 4, a fixing plate 11 is installed on the near vacuum side of the valve seat bottom plate 1, the fixing plate 11 is connected with the cavity plate 9 through a heat insulation plate 10, and the heat insulation plate 10 can ensure the temperature of the vacuum side.
The insulating panel 10 may be made of engineering plastics (e.g., teflon, Peek, etc.) that have the following characteristics: 1) vacuum sealing can be performed; 2) high temperature resistance; 3) the thermal conductivity is relatively low.
The vacuum cavity is cooled by cooling water.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, the description thereof is not repeated herein.
Claims (9)
1. A chemical source leading-in system of atomic layer deposition coating equipment is used for leading a chemical source into a vacuum coating chamber and is characterized in that: the chemical source leading-in system comprises a plurality of chemical source leading-in pipelines and a valve seat bottom plate, the chemical source leading-in pipelines are installed on the valve seat bottom plate through gas leading-in flanges, a valve seat bottom plate heater is arranged on the valve seat bottom plate, and a vacuum side heater is additionally arranged on the periphery of the chemical source leading-in pipeline positioned on the vacuum side of the gas leading-in flanges; the valve seat bottom plate heater and the vacuum side heater jointly heat the chemical source introducing pipeline in multiple sections.
2. The chemical source introduction system of the atomic layer deposition coating equipment according to claim 1, wherein: each chemical source leading-in pipeline is provided with a gas purging pipeline, and the chemical source leading-in pipeline and the gas purging pipeline share one outlet in the vacuum coating chamber on the vacuum side of the gas leading-in flange.
3. The chemical source introduction system of the atomic layer deposition coating equipment according to claim 1, wherein: the chemical source introducing system comprises an independent gas purging pipeline; in the vacuum coating chamber, the outlet of the independent gas purging pipeline and the outlet of the conveying pipeline of any chemical source introducing pipeline are mutually independent; the independent gas purging line is used for performing continuous purging to control the gas flow direction of the chemical source introduction line when introducing the chemical source.
4. The chemical source introduction system of the atomic layer deposition coating equipment according to claim 1, wherein: and the periphery of the chemical source leading-in pipelines positioned on the vacuum side of the gas leading-in flange is surrounded by a heat-insulating barrel, and the vacuum side heater is positioned in the heat-insulating barrel.
5. The chemical source introduction system of the atomic layer deposition coating equipment according to claim 4, wherein: the heat-preserving container is a barrel-shaped aluminum heat-preserving plate.
6. The chemical source introduction system of the atomic layer deposition coating equipment according to claim 1, wherein: the valve seat bottom plate is an aluminum alloy plate.
7. The chemical source introduction system of the atomic layer deposition coating equipment according to claim 1, wherein: the chemical source introducing pipelines have different extending lengths in the vacuum coating chamber positioned on the vacuum side of the gas introducing flange, namely the conveying pipeline outlets of the chemical source introducing pipelines are staggered.
8. The chemical source introduction system of the atomic layer deposition coating equipment according to claim 1, wherein: and the chemical source leading-in pipeline is provided with a leading-in dosage valve.
9. The chemical source introduction system of an atomic layer deposition coating apparatus according to claim 8, wherein: the chemical source leading-in system further comprises a vacuum gauge, wherein a vacuum degree detection end of the vacuum gauge is arranged in the vacuum coating chamber on the vacuum side of the gas leading-in flange, and the vacuum gauge is used for monitoring the pressure behind the leading-in dosage valve so as to judge the sealing state of the leading-in dosage valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021516756.9U CN212834019U (en) | 2020-07-28 | 2020-07-28 | Chemical source leading-in system of atomic layer deposition coating equipment |
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| CN202021516756.9U CN212834019U (en) | 2020-07-28 | 2020-07-28 | Chemical source leading-in system of atomic layer deposition coating equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111705309A (en) * | 2020-07-28 | 2020-09-25 | 光驰科技(上海)有限公司 | Chemical source leading-in system of atomic layer deposition coating equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111705309A (en) * | 2020-07-28 | 2020-09-25 | 光驰科技(上海)有限公司 | Chemical source leading-in system of atomic layer deposition coating equipment |
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