阅读说明：本技术 一种接地基片上形成纯铝镀的方法及装置 (Method and device for forming pure aluminum plating on grounding substrate ) 是由 李淑贤 苏丹 徐伟 谢敏 宛卓逸 胡怡 于 2020-06-10 设计创作，主要内容包括：本发明属于镀膜技术领域,具体为一种接地基片上形成纯铝镀的方法,包括以下步骤：基片清洗,除去基片表面的油污以及颗粒残留,并将清洗后的基片放入红外线烘干箱加温100°烘干；将烘干后的基片送进真空炉；进炉后真空抽至0.002帕,冲氩气至真空为0.2帕后往基片上施加500V负偏压,并辉光清洗；开多弧靶,进行铝膜打底2分钟；多弧打底结束后负偏压降低至100V,开磁控电源,电流调至50A持续120分钟镀膜结束。基片在进入镀膜机前首先经过超声波清洗,然后经过一次烘干等,而基片在进入镀膜机后又经过离子辉光清洗,以除去基片上的残留微观杂质,最终确保基片表面干净无污,为镀膜的形成提供无污环境,经过磁控溅射镀膜,最终在基片表面形成纯铝镀层。(The invention belongs to the technical field of coating, and particularly relates to a method for forming pure aluminum plating on a grounding substrate, which comprises the following steps: cleaning a substrate, removing oil stains and particle residues on the surface of the substrate, and putting the cleaned substrate into an infrared drying box to be heated for 100 ℃ for drying; feeding the dried substrate into a vacuum furnace; vacuum pumping is carried out after the substrate enters the furnace until the pressure is 0.002 Pa, argon is filled until the vacuum is 0.2 Pa, then 500V negative bias is applied to the substrate, and glow cleaning is carried out; opening a multi-arc target, and bottoming an aluminum film for 2 minutes; and after multi-arc bottoming is finished, reducing the negative bias voltage to 100V, switching on a magnetic control power supply, and regulating the current to 50A for 120 minutes to finish coating. The substrate is firstly cleaned by ultrasonic wave before entering a coating machine, then is dried for one time, and the like, and is cleaned by ion glow after entering the coating machine so as to remove residual microscopic impurities on the substrate, finally ensure that the surface of the substrate is clean and pollution-free, provide a pollution-free environment for coating, and finally form a pure aluminum coating on the surface of the substrate through magnetron sputtering coating.)

1. A method of forming pure aluminum plating on a grounded substrate, comprising the steps of:

(1) cleaning a substrate, removing oil stains and particle residues on the surface of the substrate, and putting the cleaned substrate into an infrared drying box to be heated for 100 ℃ for drying;

(2) hanging the dried substrate into a special hanging tool of a film coating machine, and feeding the substrate into a vacuum furnace;

(3) vacuum pumping is carried out after the substrate enters the furnace until the pressure is 0.002 Pa, argon is filled until the vacuum is 0.2 Pa, then 500V negative bias is applied to the substrate, and ion glow cleaning is carried out for 3-4 minutes;

(4) after glow cleaning, keeping negative bias at 500V, keeping argon unchanged, opening the multi-arc target, and setting current to be 70A to perform aluminum film priming for 2 minutes;

(5) after multi-arc bottoming is finished, reducing the negative bias to 100V, keeping argon unchanged, turning on a magnetic control power supply, adjusting the current to 50A, and finishing coating after 120 minutes;

(6) opening the furnace door after the furnace temperature is cooled and taking out the substrate;

(7) and (6) inspecting and packaging.

2. A method of forming pure aluminum plating on a grounded substrate as claimed in claim 1, wherein: in the step (1), the substrate cleaning sequentially comprises ultrasonic cleaning, primary drying, alcohol rinsing and secondary drying.

3. A method of forming pure aluminum plating on a grounded substrate as claimed in claim 2, wherein: the alcohol rinse includes an atomized cleaning phase and a jet cleaning phase.

4. A method of forming pure aluminum plating on a grounded substrate as claimed in claim 1, wherein: in the step (3), the vacuum furnace comprises an argon inlet and an argon outlet, and when glow cleaning is carried out, the air inflow of the argon inlet is greater than the air outflow of the argon outlet, so that the pressure in the vacuum furnace is kept at 0.2 Pa, and the flowing air flow in the vacuum furnace is kept from top to bottom.

5. A method of forming pure aluminum plating on a grounded substrate as claimed in claim 4, wherein: the glow wash time was 3 minutes.

6. An apparatus for forming pure aluminum plating on a grounded substrate for use in the method of claims 1-5, wherein: comprises a dust-free chamber, a cleaning device and a film coating machine which are positioned in the dust-free chamber; the cleaning device sequentially comprises an ultrasonic cleaning device, a primary drying device, an alcohol cleaning device and a secondary drying device, a mechanical claw capable of clamping objects and moving along the cleaning device is arranged in the dust-free chamber, and the mechanical claw moves along a moving track; the ultrasonic cleaning device comprises a cleaning pool, and cleaning liquid is contained in the cleaning pool and the ultrasonic device is arranged in the cleaning pool; the primary drying device is a hot air drying device and is used for removing moisture on the substrate group; removing residual oil stains on the substrate group by using an alcohol cleaning device; the secondary drying device is used for removing residual alcohol on the substrate group; the coating machine comprises an internal workbench, the top of the coating machine is provided with an argon gas inlet channel, the lower part of the coating machine is provided with an argon gas outlet channel, and the workbench is positioned in a space between the argon gas inlet channel and the argon gas outlet channel; arranging a flow equalizer at an argon inlet, arranging a plurality of air outlet holes on the flow equalizer, and injecting argon into the vacuum furnace through the flow equalizer; an annular exhaust pipe is arranged below or around the workbench and is connected with an argon gas outlet channel.

7. The apparatus for forming pure aluminum plating on a grounded substrate as claimed in claim 6, wherein: the ultrasonic cleaning device also comprises a movable base positioned at the bottom of the cleaning pool, an upper separation plate is longitudinally arranged on the upper edge of the cleaning pool along the middle part, the upper separation plate divides the liquid level of cleaning liquid in the cleaning pool into a left part and a right part, and the movable base can move back and forth from left to right; a screw driven by a motor is arranged below the cleaning pool, and the extension of the screw is consistent with the moving direction of the moving base; the bottom of the moving base is provided with a magnet block, the screw rod is correspondingly provided with the magnet block, the two magnet blocks are respectively positioned inside and outside the cleaning pool, and the moving of the lower magnet block drives the upper magnet block to move.

8. The apparatus for forming pure aluminum plating on a grounded substrate as claimed in claim 7, wherein: the alcohol cleaning device comprises a cleaning box, a lower bin opening II is arranged at the lower part of the cleaning box, and an alcohol spraying device is arranged in the lower bin opening II; the inner space of the cleaning box is divided into a left part and a right part by the turnover partition plate, an atomizing nozzle is arranged in the left part, a jet nozzle is arranged in the right part, and the two nozzles are connected with an alcohol injection device.

9. The apparatus for forming pure aluminum plating on a grounded substrate as claimed in claim 8, wherein: the secondary drying device comprises a drying box II, and an infrared drying device is arranged in the drying box II; the lower part of the drying box II is also provided with a lower bin opening II, the secondary drying device also comprises a hot air system and an air exhaust system, wherein the hot air system comprises a heating device positioned in the lower bin opening II and a hot air pipe positioned at the bottom in the drying box II, and the air exhaust system comprises an exhaust fan positioned in the lower bin opening II and an air exhaust pipe which is considered to be positioned at the upper edge in the drying box II; and the inner wall of the drying box II is provided with a moisture absorption interlayer.

10. An apparatus for forming pure aluminum plating on a grounded substrate as claimed in any one of claims 6 to 9, wherein: the film plating machine is provided with a 60KW magnetic control power supply, and the maximum sputtering current is 100A.

Technical Field

The invention belongs to the technical field of film coating, and particularly relates to a method and a device for forming pure aluminum plating on a grounding substrate.

Background

The grounding substrate is in the environment of the combined action of high-temperature plasma radiation and fluoride gas, so that the grounding substrate is required to have good conductivity and also has higher and higher requirements on high-temperature creep resistance. For the existing grounding substrate, the surface aluminizer is a key technology for ensuring the conductivity of the grounding substrate, mainly because the aluminum has good conductivity and causes the minimum pollution to components in the processes of etching, photoetching, coating and the like of an integrated circuit. In the prior art of coating the grounding substrate, the grounding substrate is not thoroughly cleaned in the early stage, dirt is easily remained on the substrate, and the dirt is blended into the deposited aluminum film, so that the formed aluminum film is impure, and the conductivity of the grounding substrate is influenced.

Disclosure of Invention

The present invention is directed to a method and apparatus for forming pure aluminum plating on a grounded substrate to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme: a method of forming pure aluminum plating on a grounded substrate, comprising the steps of:

(1) cleaning a substrate, removing oil stains and particle residues on the surface of the substrate, and putting the cleaned substrate into an infrared drying box to be heated for 100 ℃ for drying;

(2) hanging the dried substrate into a special hanging tool of a film coating machine, and feeding the substrate into a vacuum furnace;

(3) vacuum pumping is carried out after the substrate enters a furnace until the pressure is 0.002 Pa, argon is filled until the vacuum is 0.2 Pa, 500V negative bias is applied to the substrate, ion glow cleaning is started for 3-4 minutes, and microscopic impurities remained on the substrate can be cleaned in the step;

(4) after glow cleaning, keeping negative bias at 500V, keeping argon unchanged, opening the multi-arc target, and setting current to be 70A to perform aluminum film priming for 2 minutes;

(5) after multi-arc bottoming is finished, reducing the negative bias to 100V, keeping argon unchanged, turning on a magnetic control power supply, adjusting the current to 50A, and finishing coating after 120 minutes;

(6) opening the furnace door after the furnace temperature is cooled and taking out the substrate;

(7) and (6) inspecting and packaging.

Preferably, in the step (1), the substrate cleaning sequentially comprises ultrasonic cleaning, primary drying, alcohol rinsing and secondary drying, the ultrasonic cleaning can enable attachments on the surface of the substrate to fall off, the debris particles directly fall off, oil stains float on the cleaning liquid, moisture on the substrate is removed through the primary drying, the residual water stains on the substrate are removed through the alcohol rinsing, and finally the clean and pollution-free substrate of the clad surface is obtained through the secondary drying.

Preferably, the alcohol rinsing comprises an atomization cleaning stage and a jet cleaning stage, wherein alcohol is sprayed on the substrate in a mist form in the atomization cleaning stage, so that the effect of comprehensively soaking the substrate is achieved, and residual oil stains and water stains at all positions of the substrate can be fully fused with the alcohol; in the jet flow cleaning stage, alcohol is sprayed at high speed, and the jet flow collides with alcohol mixture on the surface of the substrate and then flows down from the substrate together, so that the aim of thoroughly cleaning dirt is fulfilled.

Preferably, in the step (3), the vacuum furnace comprises an argon inlet and an argon outlet, and when the glow cleaning is performed, the air inflow of the argon inlet is greater than the air outflow of the argon outlet, so that the pressure in the vacuum furnace is kept at 0.2 Pa, and the flowing air flow from top to bottom in the vacuum furnace is kept. The ion glow cleaning device is used for cleaning microscopic impurities on a substrate during ion glow cleaning, the microscopic impurities cannot be seen by naked eyes, and the microscopic impurities can be discharged from an argon outlet under the action of argon flow, so that the influence of the microscopic impurities on a plating layer is avoided.

Preferably, the glow wash time is 3 minutes.

In the invention, the substrate is firstly cleaned by ultrasonic wave before entering a coating machine, the ultrasonic cleaning can remove residual processing scraps, dust and oil stains on the substrate, at the moment, cleaning liquid and a small amount of oil stains are remained on the substrate, and then the substrate is dried for one time, in the process, the water on the substrate is dried, meanwhile, the surface temperature of the substrate is raised, the molecular motion of the residual oil stains on the substrate is accelerated, in the following alcohol rinsing process, the temperature is raised after atomized alcohol falls on the substrate, the oil stains are dissolved in alcohol under the dilution of the alcohol, and the oil stains are washed off by the injection of the alcohol, so that the oil stains on the substrate are removed, and the residual alcohol on the substrate can be removed in the secondary drying process; after the substrate enters the vacuum furnace, ion glow cleaning is carried out on the substrate to remove residual microscopic impurities on the substrate, and in the ion glow cleaning process, the argon flow can continuously take away the microscopic impurities falling off from the substrate.

The invention also aims to provide a device for forming pure aluminum plating on a grounding substrate, which comprises a cleaning device and a film coating machine which are positioned in a dust-free chamber; the cleaning device sequentially comprises an ultrasonic cleaning device, a primary drying device, an alcohol cleaning device and a secondary drying device, a mechanical claw capable of clamping objects and moving along the cleaning device is arranged in the dust-free chamber, and the mechanical claw moves along a moving track; the ultrasonic cleaning device comprises a cleaning pool, and cleaning liquid is contained in the cleaning pool and the ultrasonic device is arranged in the cleaning pool; the primary drying device is a hot air drying device and is used for removing moisture on the substrate group; removing residual oil stains on the substrate group by using an alcohol cleaning device; the secondary drying device is used for removing residual alcohol on the substrate group; the coating machine comprises an internal workbench, the top of the coating machine is provided with an argon gas inlet channel, the lower part of the coating machine is provided with an argon gas outlet channel, and the workbench is positioned in a space between the argon gas inlet channel and the argon gas outlet channel; arranging a flow equalizer at an argon inlet, arranging a plurality of air outlet holes on the flow equalizer, and injecting argon into the vacuum furnace through the flow equalizer; an annular exhaust pipe is arranged below or around the workbench and is connected with an argon gas outlet channel. In the device, a cleaning device and a film coating machine are protected by a dust-free chamber, so that external dust is prevented from influencing the cleaning and film coating of the substrate; in the ultrasonic cleaning device, the ultrasonic wave makes oil stain and impurity on the substrate drop, wherein the oil stain floats on the surface of cleaning liquid, thereby detach most oil stain on the substrate, and through one-level stoving, the substrate temperature rises, detach the water stain on the substrate simultaneously, in the alcohol cleaning device, the alcohol rises in temperature under the effect of substrate, thereby accelerate the dissolution of residual part oil stain on the substrate, in this cleaning process, oil stain and impurity on the substrate are all cleared up, only microcosmic impurity remains, and the ion glow cleaning function of coating machine from the area can detach microcosmic impurity, thereby obtain clean and non-fouling substrate. In the ion glow cleaning process, the flow equalizer at the argon inlet blows gas from the periphery of the substrate to drive the gas with larger volume in the vacuum furnace to flow, so that the microcosmic impurities falling off during the ion glow cleaning are pumped away.

Preferably, the ultrasonic cleaning device further comprises a moving base located at the bottom of the cleaning pool, an upper separation plate is longitudinally arranged on the upper edge of the cleaning pool along the middle part, the upper separation plate divides the liquid level of the cleaning liquid in the cleaning pool into a left part and a right part, and the moving base can move back and forth from left to right; a screw driven by a motor is arranged below the cleaning pool, and the extension of the screw is consistent with the moving direction of the moving base; the bottom of the moving base is provided with a magnet block, the screw rod is correspondingly provided with the magnet block, the two magnet blocks are respectively positioned inside and outside the cleaning pool, and the moving of the lower magnet block drives the upper magnet block to move. In the ultrasonic cleaning process, the oil stain floats in the surface of water, washs the pond through cutting apart, can make the regional surface of water of one side not have the oil stain to float, under the effect of removal base, the substrate can move to this region in, takes out the substrate from this region and can avoid the oil stain to adhere to on the substrate.

Preferably, the alcohol cleaning device comprises a cleaning box, a lower bin opening II is arranged at the lower part of the cleaning box, and an alcohol spraying device is arranged in the lower bin opening II; the inner space of the cleaning box is divided into a left part and a right part by the turnover partition plate, an atomizing nozzle is arranged in the left part, a jet nozzle is arranged in the right part, and the two nozzles are connected with an alcohol injection device. The atomizing nozzle sprays alcohol on the substrate in a mist form, so that the effect of soaking the substrate in all directions is achieved, and residual oil stains and water stains on all parts of the substrate can be fully fused with the alcohol; the jet flow nozzle sprays the alcohol at a high speed, and the jet flow collides with the alcohol mixture on the surface of the substrate and then flows down from the substrate together, so that the aim of thoroughly cleaning the dirt is fulfilled.

Preferably, the secondary drying device comprises a drying box II, and an infrared drying device is arranged in the drying box II; the lower part of the drying box II is also provided with a lower bin opening II, the secondary drying device also comprises a hot air system and an air exhaust system, wherein the hot air system comprises a heating device positioned in the lower bin opening II and a hot air pipe positioned at the bottom in the drying box II, and the air exhaust system comprises an exhaust fan positioned in the lower bin opening II and an air exhaust pipe which is considered to be positioned at the upper edge in the drying box II; and the inner wall of the drying box II is provided with a moisture absorption interlayer. In the drying process, alcohol on the substrate volatilizes, and the gas that air exhaust system will mix alcohol is taken out and is separated, prevents to pollute the dust free chamber, and simultaneously, the moisture absorption layer that sets up can adsorb partial liquid steam to accelerate drying efficiency.

Preferably, the film plating machine is provided with a 60KW magnetic control power supply, and the maximum sputtering current is 100A.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic flow chart of an embodiment of the present invention.

Fig. 2 is a schematic structural view of the ultrasonic cleaning apparatus in fig. 1.

Fig. 3 is a schematic structural view of a part of the cleaning apparatus shown in fig. 1.

Fig. 4 is a schematic structural diagram of the coating machine in fig. 1.

In the figure, a clean room 1, a cleaning device 2, a film coating machine 3, an ultrasonic cleaning device 4, a primary drying device 5, an alcohol cleaning device 6, a secondary drying device 7, a shelf 8, a substrate group 9, a front mechanical gripper 10, a rear mechanical gripper 11, a moving track 12, a telescopic arm 13, a claw 14, an argon inlet channel 15, an argon outlet channel 16, an exhaust tube 17, a work 18, a work table 19, an inner chamber cabinet door 20, an air pressure monitoring device 21, a material taking port door 22, a flow equalizer 23, a cleaning pool 41, an ultrasonic device 42, a moving base 43, an upper separating plate 44, a screw 45, a magnet block 46, a cleaning liquid 47, a lower bin port I50, a drying box I51, an annular air outlet device 52, a hot air device 53, a cleaning box 60, a lower bin port II61, an alcohol injection device 62, an atomizing nozzle 63, a jet nozzle 64, a turnover partition plate 65, a drying box II70, a lower bin port II71, a heating device 72, an exhaust fan 73, a hot air pipe 74, an exhaust pipe 75, a moisture absorption interlayer 76 and an infrared drying device 77.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

A method of forming pure aluminum plating on a grounded substrate, comprising the steps of:

(1) cleaning a substrate, removing oil stains and particle residues on the surface of the substrate, and putting the cleaned substrate into an infrared drying box to be heated for 100 ℃ for drying;

(2) hanging the dried substrate into a special hanging tool of a film coating machine, and feeding the substrate into a vacuum furnace;

(3) vacuum pumping is carried out after the substrate enters a furnace until the pressure is 0.002 Pa, argon is filled until the vacuum is 0.2 Pa, then 500V negative bias is applied to the substrate, ion glow cleaning is started for 3 minutes, and the step can clean the residual microscopic impurities on the substrate;

(4) after glow cleaning, keeping negative bias at 500V, keeping argon unchanged, opening the multi-arc target, and setting current to be 70A to perform aluminum film priming for 2 minutes;

(5) after multi-arc bottoming is finished, reducing the negative bias to 100V, keeping argon unchanged, turning on a magnetic control power supply, adjusting the current to 50A, and finishing coating after 120 minutes;

(6) opening the furnace door after the furnace temperature is cooled and taking out the substrate;

(7) and (6) inspecting and packaging.

More specifically, in the step (1), the substrate cleaning sequentially comprises ultrasonic cleaning, primary drying, alcohol rinsing and secondary drying, the ultrasonic cleaning can enable attachments on the surface of the substrate to fall off, the debris particles directly fall off, oil stains float on cleaning liquid, moisture on the substrate is removed through the primary drying, the residual water stains on the substrate are removed through the alcohol rinsing, and finally the clean and pollution-free substrate of the clad surface is obtained through the secondary drying. The alcohol rinsing step comprises an atomization cleaning stage and a jet cleaning stage, wherein alcohol is sprayed on the substrate in a mist form in the atomization cleaning stage, so that the effect of comprehensively soaking the substrate is achieved, and residual oil stains and water stains on all parts of the substrate can be fully fused with the alcohol; in the jet flow cleaning stage, alcohol is sprayed at high speed, and the jet flow collides with alcohol mixture on the surface of the substrate and then flows down from the substrate together, so that the aim of thoroughly cleaning dirt is fulfilled.

In addition, the vacuum furnace comprises an argon inlet and an argon outlet, and when glow cleaning is carried out, the air inflow of the argon inlet is greater than the air outflow of the argon outlet, so that the pressure in the vacuum furnace is kept at 0.2 Pa. The ion glow cleaning device is used for cleaning microscopic impurities on a substrate during ion glow cleaning, the microscopic impurities cannot be seen by naked eyes, and the microscopic impurities can be discharged from an argon outlet under the action of argon flow, so that the influence of the microscopic impurities on a plating layer is avoided.

In the invention, the substrate is firstly cleaned by ultrasonic wave before entering a coating machine, the ultrasonic cleaning can remove residual processing scraps, dust and oil stains on the substrate, at the moment, cleaning liquid and a small amount of oil stains are remained on the substrate, and then the substrate is dried for one time, in the process, the water on the substrate is dried, meanwhile, the surface temperature of the substrate is raised, the molecular motion of the residual oil stains on the substrate is accelerated, in the following alcohol rinsing process, the temperature is raised after atomized alcohol falls on the substrate, the oil stains are dissolved in alcohol under the dilution of the alcohol, and the oil stains are washed off by the injection of the alcohol, so that the oil stains on the substrate are removed, and the residual alcohol on the substrate can be removed in the secondary drying process; after the substrate enters the vacuum furnace, ion glow cleaning is carried out on the substrate to remove residual microscopic impurities on the substrate, and in the ion glow cleaning process, the argon flow can continuously take away the microscopic impurities falling off from the substrate.

Fig. 1-4 are schematic diagrams of an apparatus for forming pure aluminum plating on a grounded substrate according to the present invention, and as shown in the drawings, the apparatus includes a cleaning device 2 and a coater 3 located in a clean room 1, wherein the coater 3 is equipped with a 60KW magnetron power source and has a maximum sputtering current of 100A, and the cleaning device 2 and the coater 3 are respectively provided with a material taking port door 22 and a cabinet door 20. The cleaning device 2 sequentially comprises an ultrasonic cleaning device 4, a primary drying device 5, an alcohol cleaning device 6 and a secondary drying device 7, a mechanical claw capable of clamping objects and moving along the cleaning device 2 is arranged in the dust-free chamber 1, and the mechanical claw moves along a moving track 12; the ultrasonic cleaning device 4 comprises a cleaning pool 41, wherein the cleaning pool 41 is filled with cleaning liquid 47 and provided with an ultrasonic device 42; the primary drying device 5 is a hot air drying device and is used for removing moisture on the substrate group 9; the alcohol cleaning device 6 removes residual oil stains on the substrate group 9; the secondary drying device 7 is used for removing residual alcohol on the substrate group 9; the coating machine 3 comprises an internal workbench 19, the top of the coating machine 3 is provided with an argon gas inlet channel 15, the lower part of the coating machine 3 is provided with an argon gas outlet channel 16, the workbench 19 is positioned in a space between the argon gas inlet channel 15 and the argon gas outlet channel 16, and a pressure monitoring device 21 for detecting internal pressure is arranged; arranging a flow equalizer at an argon inlet, arranging a plurality of air outlet holes on the flow equalizer, and injecting argon into the vacuum furnace through the flow equalizer; an annular exhaust tube 17 is arranged below or around the worktable 19, and the exhaust tube 17 is connected with the argon gas outlet channel 16. In the device, a cleaning device and a film coating machine are protected by a dust-free chamber 1, and external dust is prevented from influencing the cleaning and film coating of a substrate; in addition, a shelf 8 is arranged in the clean room 1 and is specially used for placing a standby substrate group 9. In ultrasonic cleaning device 4, the ultrasonic wave makes oil stain and impurity on the substrate drop, wherein the oil stain floats on the cleaning liquid surface, thereby detach most oil stain on the substrate, and through one-level stoving, the substrate temperature risees, detach the water stain on the substrate simultaneously, in alcohol cleaning device, alcohol temperature risees under the effect of substrate, and thus accelerate the dissolution of residual part oil stain on the substrate, at this cleaning process, oil stain and impurity on the substrate are cleared up by whole, only microcosmic impurity remains, and the ion glow cleaning function of coating machine from the area can detach microcosmic impurity, thereby obtain clean non-staining substrate. In the ion glow cleaning process, the flow equalizer at the argon inlet blows gas from the periphery of the substrate to drive the gas with larger volume in the vacuum furnace to flow, so that the microcosmic impurities falling off during the ion glow cleaning are pumped away.

The primary drying device 5 comprises a drying box I51, a lower bin opening I50 is arranged at the lower part of the drying box I51, a hot air device 53 is arranged in the lower bin opening I50, an annular air outlet device 52 is arranged in the drying box I51, and when the primary drying device works, the substrate assembly is positioned in a space surrounded by the annular air outlet device 52.

In addition to the above structure, the ultrasonic cleaning apparatus 4 further includes a moving base 43 located at the bottom of the cleaning tank 41, an upper separation plate 44 is longitudinally arranged along the middle part on the upper side of the cleaning tank 41, the upper separation plate 44 divides the liquid level of the cleaning liquid 47 in the cleaning tank 41 into a left part and a right part, and the moving base 43 can move back and forth from left to right; a screw rod 45 driven by a motor is arranged below the cleaning pool 41, and the extension of the screw rod 45 is consistent with the moving direction of the moving base 43; the magnet block 46 is disposed at the bottom of the movable base 43, the magnet block 46 is correspondingly disposed on the screw 45, the two magnet blocks 46 are respectively disposed inside and outside the cleaning tank 41, and the movement of the lower magnet block 46 drives the upper magnet block 46 to move. This embodiment uses two front mechanical grippers 10 and rear mechanical grippers 11, wherein the front mechanical gripper 10 is responsible for gripping the substrate assembly 9 from the shelf 8 and placing the substrate assembly on the moving base 43, and the rear mechanical gripper 11 is responsible for gripping the ultrasonically cleaned substrate assembly and transferring the substrate assembly backwards. In the ultrasonic cleaning process, the oil stain floats on the water surface, and through cutting apart washing pond 41, the water surface of one side region can be enabled not to have the oil stain to float, and under the effect of moving base 43, the substrate can move to this region in, and it can avoid the oil stain to adhere to on the substrate to fish the substrate out from this region.

In addition, the alcohol cleaning device 6 comprises a cleaning box 60, a lower bin opening II61 is arranged at the lower part of the cleaning box 60, and an alcohol spraying device 62 is arranged in a lower bin opening II 61; the inner space of the cleaning box 60 is divided into a left part and a right part by an overturning partition plate 65, an atomizing nozzle 63 is arranged in the left part, a jet nozzle 64 is arranged in the right part, and the two nozzles are connected with an alcohol injection device 62. The atomizing nozzle 63 sprays alcohol on the substrate in a mist form, so that the effect of soaking the substrate in all directions is achieved, and residual oil stains and water stains on all parts of the substrate can be fully fused with the alcohol; the jet nozzle 64 sprays alcohol at a high speed, and the jet flow collides with the alcohol mixture on the surface of the substrate and then flows down from the substrate together, thereby achieving the purpose of thoroughly cleaning the dirt.

The secondary drying device 7 comprises a drying box II70, and an infrared drying device 77 is arranged in the drying box II 70; the lower part of the drying box II70 is also provided with a lower bin opening II71, the secondary drying device 7 also comprises a hot air system and an air extraction system, wherein the hot air system comprises a heating device 72 positioned in the lower bin opening II71 and a hot air pipe 74 positioned at the inner bottom of the drying box II70, and the air extraction system comprises an exhaust fan 73 positioned in the lower bin opening II71 and an air extraction pipe 75 considered to be connected with the inner upper edge of the drying box II 70; the inner wall of the drying box II70 is provided with a moisture absorption interlayer 76. In the drying process, alcohol on the substrate volatilizes, the gas mixed with alcohol is pumped away by the air pumping system, the pollution to the dust-free chamber 1 is prevented, and meanwhile, the arranged moisture absorption layer 76 can absorb partial liquid steam, so that the drying efficiency is accelerated.

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.

The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.