WO2018173861A1 - 基板処理装置および基板処理方法 - Google Patents
基板処理装置および基板処理方法 Download PDFInfo
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- WO2018173861A1 WO2018173861A1 PCT/JP2018/009797 JP2018009797W WO2018173861A1 WO 2018173861 A1 WO2018173861 A1 WO 2018173861A1 JP 2018009797 W JP2018009797 W JP 2018009797W WO 2018173861 A1 WO2018173861 A1 WO 2018173861A1
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- processing unit
- supercritical fluid
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- drying processing
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Images
Classifications
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67253—Process monitoring, e.g. flow or thickness monitoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0021—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by liquid gases or supercritical fluids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02046—Dry cleaning only
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/67034—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for drying
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/20—Sequence of activities consisting of a plurality of measurements, corrections, marking or sorting steps
- H01L22/26—Acting in response to an ongoing measurement without interruption of processing, e.g. endpoint detection, in-situ thickness measurement
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02101—Cleaning only involving supercritical fluids
Definitions
- the disclosed embodiment relates to a substrate processing apparatus and a substrate processing method.
- a drying process is performed by forming a liquid film for preventing drying on the surface of the substrate, and contacting the substrate on which the liquid film is formed with the supercritical fluid to replace the liquid that forms the liquid film with the supercritical fluid.
- a substrate processing apparatus is known (see, for example, Patent Document 1).
- An object of one embodiment of the present invention is to provide a substrate processing apparatus and a substrate processing method for detecting the presence or absence of a liquid in a drying processing unit in which a drying process is performed.
- a substrate processing apparatus includes a drying processing unit, a discharge line, an acquisition unit, and a detection unit.
- the drying processing unit performs a drying process on the substrate by bringing the substrate whose surface is wetted by the liquid into contact with the supercritical fluid and replacing the liquid with the supercritical fluid.
- the discharge line is provided in the drying processing unit and discharges the fluid from the drying processing unit.
- An acquisition part acquires the optical information with respect to the fluid provided in a discharge line and discharged
- a detection part detects the presence or absence of the liquid in a drying process part based on the optical information acquired by the acquisition part.
- FIG. 1 is a diagram showing a schematic configuration of a substrate processing system according to the first embodiment.
- FIG. 2 is a cross-sectional view showing the configuration of the cleaning processing unit.
- FIG. 3 is an external perspective view showing the configuration of the drying processing unit.
- FIG. 4 is a diagram illustrating a configuration example of the entire system of the drying processing unit.
- FIG. 5 is a cross-sectional view showing the configuration of the sight glass.
- FIG. 6 is a block diagram illustrating a schematic configuration of a control device that determines the presence or absence of liquid.
- FIG. 7 is a diagram schematically showing an image of the supercritical fluid photographed by the camera.
- FIG. 8 is a flowchart showing the processing procedure of the drying process according to the first embodiment.
- FIG. 9 is a flowchart illustrating a processing procedure of a drying process according to the second embodiment.
- FIG. 1 is a diagram showing a schematic configuration of a substrate processing system 1 according to the first embodiment.
- the X axis, the Y axis, and the Z axis that are orthogonal to each other are defined, and the positive direction of the Z axis is the vertically upward direction.
- the substrate processing system 1 includes a carry-in / out station 2 and a processing station 3.
- the carry-in / out station 2 and the processing station 3 are provided adjacent to each other.
- the loading / unloading station 2 includes a carrier placement unit 11 and a conveyance unit 12.
- a plurality of carriers C that accommodate a plurality of semiconductor wafers W (hereinafter referred to as wafers W) in a horizontal state are placed on the carrier placement unit 11.
- the transfer unit 12 is provided adjacent to the carrier placement unit 11 and includes a substrate transfer device 13 and a delivery unit 14 inside.
- the substrate transfer device 13 includes a wafer holding mechanism that holds the wafer W. Further, the substrate transfer device 13 can move in the horizontal direction and the vertical direction and can turn around the vertical axis, and transfers the wafer W between the carrier C and the delivery unit 14 using the wafer holding mechanism. Do.
- the processing station 3 is provided adjacent to the transfer unit 12.
- the processing station 3 includes a transport unit 15, a plurality of cleaning processing units 16, and a plurality of drying processing units 17.
- the plurality of cleaning processing units 16 and the plurality of drying processing units 17 are provided side by side on both sides of the transport unit 15.
- the arrangement and the number of the cleaning processing units 16 and the drying processing units 17 shown in FIG. 1 are examples, and are not limited to those shown in the drawing.
- the transfer unit 15 includes a substrate transfer device 18 inside.
- the substrate transfer device 18 includes a wafer holding mechanism that holds the wafer W. Further, the substrate transfer device 18 can move in the horizontal direction and the vertical direction and can turn around the vertical axis, and uses a wafer holding mechanism to deliver the delivery unit 14, the cleaning processing unit 16, and the drying processing unit 17. The wafer W is transferred between the two.
- the cleaning processing unit 16 performs a predetermined cleaning process on the wafer W transferred by the substrate transfer device 18.
- the cleaning unit 16 will be described with reference to FIG. FIG. 2 is a cross-sectional view showing the configuration of the cleaning processing unit 16.
- the cleaning processing unit 16 is configured as, for example, a single wafer cleaning processing unit that cleans wafers W one by one by spin cleaning.
- the cleaning processing unit 16 holds the wafer W substantially horizontally by the wafer holding mechanism 25 disposed in the outer chamber 23 forming the processing space, and rotates the wafer holding mechanism 25 around the vertical axis to rotate the wafer W. Rotate. Then, the cleaning processing unit 16 causes the nozzle arm 26 to enter above the rotating wafer W, and supplies the chemical liquid and the rinse liquid from the chemical liquid nozzle 26a provided at the tip of the nozzle arm 26 in a predetermined order. Then, the surface of the wafer W is cleaned.
- a chemical solution supply path 25 a is also formed inside the wafer holding mechanism 25. Then, the back surface cleaning of the wafer W is performed by the chemical solution or the rinse solution supplied from the chemical solution supply path 25a.
- the various chemical solutions described above are received by the outer chamber 23 and the inner cup 24 disposed in the outer chamber 23, and the drain port 23 a provided at the bottom of the outer chamber 23 and the drain provided at the bottom of the inner cup 24.
- the liquid is discharged from the liquid port 24a. Further, the atmosphere in the outer chamber 23 is exhausted from an exhaust port 23 b provided at the bottom of the outer chamber 23.
- the IPA liquid is supplied to the front and back surfaces of the wafer W while rotating the wafer holding mechanism 25 to replace the DIW remaining on both surfaces of the wafer W. Thereafter, the rotation of the wafer holding mechanism 25 is gently stopped.
- the wafer W that has been cleaned in this way has a liquid film of IPA liquid formed on its surface.
- the wafer W on which the liquid film is formed is transferred to the substrate transfer device 18 by a transfer mechanism (not shown) provided in the wafer holding mechanism 25 and is unloaded from the cleaning processing unit 16.
- the liquid film formed on the surface of the wafer W evaporates (vaporizes) the liquid on the surface of the wafer W during the transfer of the wafer W from the cleaning processing unit 16 to the drying processing unit 17 and the loading operation to the drying processing unit 17. ) Function as a liquid for preventing drying, which prevents pattern collapse from occurring.
- the drying processing unit 17 performs a drying process on the wafer W cleaned by the cleaning processing unit 16 using a supercritical fluid.
- the IPA liquid on the wafer W is brought into contact with the supercritical fluid of CO2, so that the IPA liquid is dissolved and removed in the supercritical fluid. Thereby, the wafer W is dried.
- FIG. 3 is an external perspective view showing the configuration of the drying processing unit 17.
- the drying processing unit 17 includes a main body 31, a holding plate 32, and a lid member 33.
- An opening 34 for loading and unloading the wafer W is formed in the casing-shaped main body 31.
- the holding plate 32 holds the wafer W to be processed in the horizontal direction.
- the lid member 33 supports the holding plate 32 and seals the opening 34 when the wafer W is loaded into the main body 31.
- the main body 31 is a container in which a processing space capable of accommodating the wafer W is formed, and supply ports 35A and 35B and a discharge port 36 are provided on the wall portion.
- the supply ports 35A and 35B are connected to a supply line L1 (see FIG. 4) for circulating a supercritical fluid.
- the discharge port 36 is connected to a discharge line L2 (see FIG. 4) for discharging the supercritical fluid.
- the supply port 35 ⁇ / b> A is connected to the side surface opposite to the opening 34 in the casing-shaped main body 31.
- the supply port 35 ⁇ / b> B is connected to the bottom surface of the main body 31.
- the discharge port 36 is connected to the lower side of the opening 34. 3 shows two supply ports 35A and 35B and one discharge port 36, the number of supply ports 35A and 35B and discharge ports 36 is not particularly limited.
- fluid supply headers 37A and 37B and a fluid discharge header 38 are provided inside the main body 31.
- Each of the fluid supply headers 37A and 37B and the fluid discharge header 38 has a large number of openings.
- the fluid supply header 37 ⁇ / b> A is connected to the supply port 35 ⁇ / b> A and is provided adjacent to the side surface opposite to the opening 34 in the housing-shaped main body 31.
- a large number of openings formed in the fluid supply header 37A face the opening 34 side.
- the fluid supply header 37 ⁇ / b> B is connected to the supply port 35 ⁇ / b> B and is provided at the center of the bottom surface inside the housing-like main body 31. In addition, a large number of openings formed in the fluid supply header 37B face upward.
- the fluid discharge header 38 is connected to the discharge port 36, and is provided adjacent to the side surface on the opening 34 side and below the opening 34 inside the housing-shaped main body 31. Further, a large number of openings formed in the fluid discharge header 38 face the fluid supply header 37A side.
- the fluid supply headers 37A and 37B supply a supercritical fluid into the main body 31.
- the fluid discharge header 38 guides and discharges the supercritical fluid in the main body 31 to the outside of the main body 31. Note that the supercritical fluid discharged to the outside of the main body 31 via the fluid discharge header 38 includes an IPA liquid dissolved in the supercritical fluid from the surface of the wafer W.
- the drying processing unit 17 further includes a pressing mechanism (not shown).
- the pressing mechanism has a function of pressing the lid member 33 toward the main body 31 and sealing the processing space against the internal pressure caused by the supercritical fluid in the supercritical state supplied into the processing space inside the main body 31.
- a heat insulating material, a tape heater, or the like may be provided on the surface of the main body 31 so that the supercritical fluid supplied into the processing space can maintain a predetermined temperature.
- FIG. 4 is a diagram illustrating a configuration example of the entire system of the drying processing unit 17.
- a fluid supply source 51 is provided on the upstream side of the drying processing unit 17. Further, a supply line L ⁇ b> 1 is provided for connecting the fluid supply source 51 and the drying processing unit 17, and allowing the supercritical fluid to circulate in the drying processing unit 17. A supercritical fluid is supplied from the fluid supply source 51 to the supply line L1.
- the fluid supply source 51 stores, for example, a raw material CO 2 for generating a CO 2 supercritical fluid.
- the supply line L1 is provided with a valve 52a, an orifice 55a, a filter 57, and a valve 52b sequentially from the upstream side to the downstream side.
- the terms upstream and downstream here are based on the flow direction of the supercritical fluid in the supply line L1 and the discharge line L2.
- the valve 52a is a valve that adjusts on and off of the supply of the supercritical fluid from the fluid supply source 51, and flows the supercritical fluid to the downstream supply line L1 in the open state, and the downstream supply line in the closed state. Do not flow supercritical fluid through L1.
- a high-pressure supercritical fluid of about 16 to 20 MPa is supplied from the fluid supply source 51 to the supply line L1 through the valve 52a.
- the orifice 55a has a function of adjusting the pressure of the supercritical fluid supplied from the fluid supply source 51.
- the orifice 55a can circulate a supercritical fluid whose pressure is adjusted to about 16 MPa through the supply line L1 downstream of the orifice 55a.
- the filter 57 removes foreign matters contained in the supercritical fluid sent from the orifice 55a, and causes the clean supercritical fluid to flow downstream.
- the valve 52b is a valve that adjusts on / off of the supply of the supercritical fluid to the drying processing unit 17.
- the supply line L1 connected to the drying processing unit 17 from the valve 52b is connected to the supply port 35A shown in FIG. 3, and the supercritical fluid flowing through the valve 52b passes through the supply port 35A and the fluid supply header 37A. It is supplied into the main body 31.
- the supply line L1 is branched between the filter 57 and the valve 52b. Specifically, from the supply line L1 between the filter 57 and the valve 52b, the supply line L1 connected to the drying processing unit 17 through the valve 52c and the orifice 55b, the valve 52d, and the check valve 58a are connected. The supply line L1 connected to the purge device 62 via the branch extends.
- the supply line L1 connected to the drying processing unit 17 via the valve 52c and the orifice 55b is an auxiliary flow path for supplying the supercritical fluid to the drying processing unit 17.
- the supply line L1 which is an auxiliary flow path, is connected to the supply port 35B shown in FIG. 3, and the supercritical fluid flowing through the valve 52c enters the main body 31 via the supply port 35B and the fluid supply header 37B. Supplied.
- a supply line L1 connected to the purge device 62 via the valve 52d and the check valve 58a is a flow path for supplying an inert gas such as nitrogen to the drying processing unit 17, for example, from the fluid supply source 51. This is utilized while the supply of the supercritical fluid to the drying processing unit 17 is stopped.
- the valve 52d and the valve 52b are controlled to be open, and the inert gas sent from the purge device 62 to the supply line L1 is It is supplied to the drying processing unit 17 through the check valve 58a, the valve 52d, and the valve 52b.
- a discharge line L ⁇ b> 2 for discharging the supercritical fluid from the drying processing unit 17 is provided on the downstream side of the drying processing unit 17.
- a switching valve 52i, a sight glass 70, a switching valve 52j, a valve 52e, an exhaust adjustment valve 59, and a valve 52f are sequentially provided from the upstream side toward the downstream side.
- the discharge line L2 is connected to the discharge port 36, and the supercritical fluid inside the main body 31 of the drying processing unit 17 is sent toward the valve 52e via the fluid discharge header 38 and the discharge port 36 shown in FIG. It is done.
- the sight glass 70 includes a pipe part 71, a pair of transmission windows 72, and a pair of frames 73 that support the transmission window 72 and attach the transmission window 72 to the pipe part 71.
- FIG. 5 is a cross-sectional view showing a configuration of the sight glass 70.
- the pipe part 71 communicates with the discharge line L2.
- the pair of transmission windows 72 are arranged to face each other.
- the pipe portion 71 may be configured integrally with the discharge line L2.
- An acquisition unit 75 that acquires optical information of the supercritical fluid discharged from the drying processing unit 17 is disposed outside the sight glass 70.
- the acquisition unit 75 includes a light source 76 and a camera 77.
- the light source 76 emits light from the outside of the one transmission window 72 toward the inside of the tube portion 71.
- the camera 77 is a camera having an image sensor such as a COMMS (Complementary Metal Oxide Semiconductor) or a CCD (Charge Coupled Device).
- the camera 77 takes an image of the inside of the pipe portion 71 from the other transmission window 72.
- the camera 77 images the supercritical fluid discharged from the drying processing unit 17. Image data acquired by shooting is output to the control unit 19.
- the sight glass 70 and the acquisition part 75 may be provided in the discharge line L2 downstream from the valve 52e, for example.
- the switching valve 52i is a valve that switches the fluid flowing through the sight glass 70, and is a three-way valve.
- the switching valve 52i circulates a supercritical fluid from the drying processing unit 17 to the sight glass 70 during the drying process, and a cleaning liquid such as IPA or DIW from the cleaning liquid supply source 63 to the sight glass 70 via the cleaning liquid supply line L3 during the cleaning process. Circulate.
- the switching valve 52j is a valve that switches the flow direction (discharge direction) of the fluid flowing through the sight glass 70, and is a three-way valve.
- the switching valve 52j causes the supercritical fluid to flow from the sight glass 70 to the discharge line L2 downstream of the switching valve 52j during the drying process, and to the cleaning liquid discharge line L4 that discharges the cleaning liquid from the sight glass 70 at the time of cleaning. Circulate.
- the switching valve 52i and the switching valve 52j may be configured by combining two valves. For example, a valve may be provided in each of the cleaning liquid supply line L3 and the discharge line L2 on the upstream side of the portion where the cleaning liquid supply line L3 joins.
- the valve 52e is a valve for adjusting on / off of the discharge of the supercritical fluid from the drying processing unit 17.
- the valve 52 e is controlled to be opened, and when the supercritical fluid is not discharged from the drying processing unit 17, the valve 52 e is controlled to be closed.
- the exhaust adjustment valve 59 is a valve that adjusts the discharge amount of the supercritical fluid from the drying processing unit 17 and can be constituted by, for example, a back pressure valve.
- the opening degree of the exhaust adjustment valve 59 is adaptively adjusted under the control of the control device 4 according to the desired discharge amount of the supercritical fluid from the inside of the main body 31.
- the valve 52f is a valve that adjusts on / off of the discharge of the supercritical fluid from the drying processing unit 17 to the outside.
- the valve 52f is controlled to be opened, and when the supercritical fluid is not discharged, the valve 52f is controlled to be closed.
- An exhaust adjustment needle valve 61a and a check valve 58b are provided on the downstream side of the valve 52f.
- the exhaust adjustment needle valve 61a is a valve for adjusting the discharge amount of the supercritical fluid sent through the valve 52f to the outside, and the opening degree of the exhaust adjustment needle valve 61a is set to a desired discharge amount of the supercritical fluid. Adjusted accordingly.
- the check valve 58b is a valve that prevents the back flow of the supercritical fluid to be discharged, and has a function of reliably discharging the supercritical fluid to the outside.
- the discharge line L2 is branched between the exhaust adjustment valve 59 and the valve 52f. Specifically, from the discharge line L2 between the exhaust adjustment valve 59 and the valve 52f, a discharge line L2 connected to the outside via the valve 52g and a discharge line L2 connected to the outside via the valve 52h And branch and extend.
- the valve 52g and the valve 52h are valves that adjust on / off of the discharge of the supercritical fluid to the outside, like the valve 52f.
- An exhaust adjustment needle valve 61b and a check valve 58c are provided on the downstream side of the valve 52g to adjust the discharge amount of the supercritical fluid and prevent the backflow of the supercritical fluid.
- a check valve 58d is provided on the downstream side of the valve 52h to prevent back flow of the supercritical fluid.
- valves 52f, 52g, and 52h When discharging the supercritical fluid from the drying processing unit 17, one or more of the valves 52f, 52g, and 52h are controlled to be opened.
- the supercritical fluid is discharged to the outside via a plurality of valves (valves 52 f, 52 g, 52 h), thereby finely discharging the supercritical fluid to the outside. Can be controlled.
- a pressure sensor that detects the pressure of the supercritical fluid and a temperature sensor that detects the temperature of the supercritical fluid are installed at various locations on the supply line L1 and the discharge line L2.
- a pressure sensor 53a and a temperature sensor 54a are provided between the valve 52a and the orifice 55a
- a pressure sensor 53b and a temperature sensor 54b are provided between the orifice 55a and the filter 57.
- a pressure sensor 53 c is provided between the filter 57 and the valve 52 b
- a temperature sensor 54 c is provided between the valve 52 b and the drying processing unit 17, and between the orifice 55 b and the drying processing unit 17.
- a temperature sensor 54d is provided, and the drying processing unit 17 is provided with a temperature sensor 54e.
- a pressure sensor 53d and a temperature sensor 54f are provided between the drying processing unit 17 and the valve 52e, and a pressure sensor 53e and a temperature sensor 54g are provided between the exhaust adjustment valve 59 and the valve 52f.
- a heater H is provided at an arbitrary location where the supercritical fluid flows in the drying processing unit 17.
- a heater H is provided between the valve 52a and the orifice 55a which are supply lines L1, between the orifice 55a and the filter 57, between the filter 57 and the valve 52b, and between the valve 52b and the drying processing unit 17. Is provided with a heater H.
- the heater H may be provided in the dry processing unit 17 and other places including the discharge line L2. That is, the heater H may be provided in all the channels until the supercritical fluid supplied from the fluid supply source 51 is discharged to the outside.
- the supercritical fluid is supplied to the main body 31 of the drying processing unit 17 through the supply line L1, and the inside of the main body 31 is brought into a supercritical state. Then, while discharging the supercritical fluid through the discharge line L2, the supercritical fluid is supplied to maintain the inside of the main body 31 in a supercritical state, and the IPA on the wafer W is gradually replaced with the supercritical fluid.
- the substrate processing system 1 includes a control device 4.
- the control device 4 is a computer, for example, and includes a control unit 19 and a storage unit 20.
- the storage unit 20 is realized by, for example, a semiconductor memory device such as a RAM (Random Access Memory) or a flash memory, or a storage device such as a hard disk or an optical disk.
- a semiconductor memory device such as a RAM (Random Access Memory) or a flash memory
- a storage device such as a hard disk or an optical disk.
- the control unit 19 includes a microcomputer having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM, an input / output port, and various circuits.
- the CPU of the microcomputer reads out and executes a program stored in the ROM, thereby realizing control of the substrate transfer apparatuses 13 and 18, the cleaning processing unit 16, the drying processing unit 17, and the like.
- the control part 19 receives the measurement result of each sensor, and outputs the instruction
- the program may be recorded on a computer-readable recording medium and may be installed in the storage unit 20 of the control device 4 from the recording medium.
- Examples of the computer-readable recording medium include a hard disk (HD), a flexible disk (FD), a compact disk (CD), a magnetic optical disk (MO), and a memory card.
- FIG. 6 is a block diagram illustrating a schematic configuration of the control device 4 that determines the presence or absence of IPA.
- the control unit 19 includes an instruction unit 19A, an input unit 19B, a determination unit 19C, and an output unit 19D.
- indication parts will output an imaging
- the completion time is a preset time, and is usually a time until the IPA on the wafer W is replaced with the supercritical fluid.
- the image data of the supercritical fluid acquired by the camera 77 is input to the input unit 19B.
- the determination unit 19C compares the acquired image data with the reference image data stored in the storage unit 20, and determines whether the IPA on the wafer W has been replaced with a supercritical fluid.
- the reference image data is image data of a supercritical fluid that does not include IPA.
- FIG. 7 is a diagram schematically showing an image of the supercritical fluid photographed by the camera 77.
- the image taken by the camera 77 appears darker, and the smaller the IPA amount, that is, the more the IPA on the wafer W is replaced with the supercritical fluid, the camera 77.
- the image captured by is bright and white.
- the determination unit 19C includes color information (at least one of hue, saturation, and brightness) of image data captured by the camera 77 and color information (at least one of hue, saturation, and brightness) of reference image data. If the difference between the color information of the captured image data and the color information of the reference image data is greater than a predetermined threshold value, it is determined that the IPA on the wafer W has not been replaced with the supercritical fluid. . The determination unit 19C determines that the IPA on the wafer W has been replaced with a supercritical fluid when the difference between the color information of the captured image data and the color information of the reference image data is equal to or less than a predetermined threshold. In this way, the determination unit 19C detects the presence or absence of IPA in the drying processing unit 17 based on the optical information of the supercritical fluid.
- the determination unit 19C determines that an abnormality has occurred in the drying process when the IPA on the wafer W has not been replaced with the supercritical fluid even after the completion time has elapsed since the drying process started.
- the output unit 19D outputs a warning signal to the warning unit 78 if the IPA on the wafer W is not replaced with the supercritical fluid even after the completion time has elapsed since the drying process was started.
- the warning unit 78 gives a warning indicating that the drying process is abnormal.
- the warning unit 78 is a warning light, a monitor, or the like. When the drying process is abnormal, for example, the warning light is turned on and blinks to indicate that the monitor is abnormal.
- the output unit 19D outputs a drying processing completion signal to the drying processing unit 17 when the completion time has elapsed since the drying processing was started and the IPA on the wafer W has been replaced with the supercritical fluid. .
- FIG. 8 is a flowchart showing the processing procedure of the drying process according to the first embodiment.
- the substrate processing system 1 executes the drying process when the cleaning process is completed and the wafer W on which the liquid film is formed is carried into the main body 31 of the drying processing unit 17 (S10). As the drying process proceeds, the IPA on the wafer W is gradually replaced with the supercritical fluid.
- the substrate processing system 1 continues the drying process until the completion time elapses after the drying process is started (S11: No).
- the substrate processing system 1 images the supercritical fluid with the camera 77 (S12).
- the substrate processing system 1 compares the image data acquired by photographing with the reference image data, and determines whether or not the replacement of the IPA on the wafer W by the supercritical fluid is completed (S13). That is, the substrate processing system 1 determines whether an abnormality has occurred in the drying process.
- the substrate processing system 1 completes the drying process by reducing the pressure in the main body 31 to the atmospheric pressure when the replacement is completed and no abnormality occurs in the drying process (S13: Yes).
- the substrate processing system 1 warns that an abnormality has occurred in the drying process by the warning unit 78 when the replacement has not been completed and an abnormality has occurred in the drying process (S13: No). S15).
- the substrate processing system 1 can image the supercritical fluid discharged from the drying processing unit 17 and detect the presence or absence of IPA (liquid) in the drying processing unit 17 based on the image data acquired by the imaging.
- the substrate processing system 1 starts the drying process by the drying processing unit 17 and images the supercritical fluid by the camera 77 when the completion time elapses. Then, the substrate processing system 1 compares the image data acquired by photographing with the reference image data, and even if the completion time has elapsed, the IPA is not replaced with the supercritical fluid, and an abnormality occurs in the drying process. If it is, a warning unit 78 gives a warning. As a result, when an abnormality occurs in the drying process, the occurrence of the abnormality can be accurately detected, and the occurrence of the abnormality can be warned.
- the substrate processing system 1 can detect the presence or absence of IPA by photographing the supercritical fluid with the camera 77.
- the substrate processing system 1 cleans the transmission window 72 of the sight glass 70 by supplying a cleaning liquid to the discharge line L2. Thereby, the adhering matter adhering to the transmission window 72 of the sight glass 70 can be washed away, the supercritical fluid can be clearly photographed by the camera 77, and the presence or absence of IPA can be detected.
- the instruction unit 19A When the drying process by the drying processing unit 17 is started, the instruction unit 19A outputs an imaging instruction to the camera 77 so that the camera 77 images the supercritical fluid.
- the instruction unit 19A outputs shooting instructions at predetermined intervals set in advance. Thereby, the camera 77 images the supercritical fluid at a predetermined interval.
- the determination unit 19C compares the image data acquired at a predetermined interval with the reference image data stored in the storage unit 20, and determines whether the IPA on the wafer W has been replaced with a supercritical fluid.
- the determination unit 19C determines whether or not the completion time has elapsed since the start of the drying process.
- the output unit 19D outputs a replacement completion instruction to the drying processing unit 17 when the IPA on the wafer W is replaced with a supercritical fluid.
- the output unit 19D outputs a warning signal to the warning unit 78 if the IPA on the wafer W is not replaced with the supercritical fluid even after the completion time has elapsed since the drying process was started.
- the progress of the drying process is determined based on the image data acquired by photographing the supercritical fluid, and the drying process is performed at the timing when the IPA on the wafer W is replaced with the supercritical fluid.
- FIG. 9 is a flowchart illustrating a processing procedure of a drying process according to the second embodiment.
- the substrate processing system 1 executes the drying process when the cleaning process is completed and the wafer W on which the liquid film is formed is loaded into the main body 31 of the drying processing unit 17 (S20).
- the substrate processing system 1 images the supercritical fluid with the camera 77 (S21).
- the substrate processing system 1 compares the image data acquired by imaging with the reference image data, and determines whether or not the replacement of the IPA on the wafer W by the supercritical fluid is completed (S22).
- the substrate processing system 1 lowers the pressure in the main body 31 to atmospheric pressure and completes the drying process (S23).
- the substrate processing system 1 determines whether the completion time has elapsed since the start of the drying process (S24).
- the substrate processing system 1 continues the drying process when the completion time has not elapsed (S24: No).
- the substrate processing system 1 warns that an abnormality has occurred in the drying process by the warning unit 78 (S25).
- the substrate processing system 1 detects the completion of replacement of the IPA by the supercritical fluid by photographing the supercritical fluid with the camera 77 and comparing the image data acquired by the photographing with the reference image data. Thereby, IPA can be accurately replaced with a supercritical fluid. Moreover, the pressure in the main body 31 can be reduced at the timing when the replacement of the IPA by the supercritical fluid is completed, and when the replacement is completed before the completion time elapses, the drying process can be completed in a short time. .
- the acquisition unit 75 images the supercritical fluid with the camera 77 and acquires optical information on the supercritical fluid.
- the acquisition unit 75 measures the absorbance with a spectrophotometer and acquires the optical information on the supercritical fluid. May be.
- the determination unit 19C determines whether the IPA on the wafer W has been replaced with a supercritical fluid based on the absorbance.
- the acquisition part 75 may acquire the optical information with respect to a supercritical fluid based on the reflected light by a supercritical fluid.
- the acquisition unit 75 includes a camera 77 and a spectrophotometer, and the determination unit 19C replaces the IPA on the wafer W with the supercritical fluid based on the image data acquired by the camera 77 and the absorbance. It may be determined whether or not.
- the determination unit 19C learns the feature amount of the image data in which the IPA on the wafer W is replaced by the supercritical fluid by machine learning, for example, deep learning, and the wafer is obtained from the image data captured and acquired by the camera 77. It may be determined whether the IPA on W has been replaced with a supercritical fluid.
- the determination unit 19C determines whether or not the IPA on the wafer W has been replaced with the supercritical fluid. It may be determined whether or not Since the density of the fluid in the main body 31 changes before and after the main body 31 is filled with the supercritical fluid, images taken by the camera 77 are different before and after the main body 31 is filled with the supercritical fluid. .
- the determination unit 19C stores the image data before the main body 31 is filled with the supercritical fluid (or the subsequent image data), and compares the stored image data with the image data obtained by photographing. It may be determined whether 31 is filled with a supercritical fluid.
- the determination unit 19 ⁇ / b> C may determine that an abnormality has occurred in the drying processing unit 17 and issue a warning by the warning unit 78.
- control unit 19 of the above embodiment may be integrated or separated.
- the support unit 19A and the output unit 19D may be integrated into one output unit.
- Substrate processing system (substrate processing equipment) 4 Control Device 16 Cleaning Processing Unit 17 Drying Processing Unit (Drying Processing Unit) 19 control unit 19A instruction unit 19B input unit 19C determination unit (detection unit) 19D output unit 20 storage unit 63 cleaning liquid supply source (cleaning liquid supply unit) 70 sight glass 72 transmission window 75 acquisition part 77 camera 78 warning part L1 supply line L2 discharge line L3 cleaning liquid supply line L4 cleaning liquid discharge line
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Abstract
Description
<基板処理システム1の概要>
図1を参照しながら、第1実施形態に係る基板処理システム1の概略構成について説明する。図1は、第1実施形態に係る基板処理システム1の概略構成を示す図である。以下では、位置関係を明確にするために、互いに直交するX軸、Y軸およびZ軸を規定し、Z軸正方向を鉛直上向き方向とする。
次に、第1実施形態に係る基板処理システム1における乾燥処理について図8を参照して説明する。図8は、第1実施形態に係る乾燥処理の処理手順を示すフローチャートである。
基板処理システム1は、乾燥処理ユニット17から排出される超臨界流体を撮影し、撮影によって取得された画像データに基づいて乾燥処理ユニット17内のIPA(液体)の有無を検出することができる。
<基板処理システム1の構成>
次に、第2実施形態に係る基板処理システム1について説明する。第2実施形態に係る基板処理システム1では、超臨界流体の光学情報に基づいてIPAの有無を判定する制御装置4が異なっており、ここでは、制御装置4について説明する。なお、制御装置4の概略構成は第1実施形態と同じであり、図6を参照して説明する。
次に第2実施形態に係る基板処理システム1における乾燥処理について図9を参照して説明する。図9は、第2実施形態に係る乾燥処理の処理手順を示すフローチャートである。
基板処理システム1は、カメラ77によって超臨界流体を撮影し、撮影によって取得された画像データと参考画像データとを比較することで、超臨界流体によるIPAの置換完了を検出する。これにより、IPAを正確に超臨界流体に置換することができる。また、超臨界流体によるIPAの置換が完了したタイミングで本体31内の圧力を下げることができ、完了時間の経過前に置換が完了する場合には、乾燥処理を短い時間で完了させることができる。
上記実施形態では、取得部75は、カメラ77によって超臨界流体を撮影し、超臨界流体に対する光学情報を取得したが、例えば、分光光度計によって吸光度を測定し、超臨界流体に対する光学情報を取得してもよい。この場合、判定部19Cは、吸光度に基づいてウェハW上のIPAが超臨界流体に置換されたかどうか判定する。また、取得部75は、超臨界流体による反射光に基づいて超臨界流体に対する光学情報を取得してもよい。
4 制御装置
16 洗浄処理ユニット
17 乾燥処理ユニット(乾燥処理部)
19 制御部
19A 指示部
19B 入力部
19C 判定部(検出部)
19D 出力部
20 記憶部
63 洗浄液供給源(洗浄液供給部)
70 サイトグラス
72 透過窓
75 取得部
77 カメラ
78 警告部
L1 供給ライン
L2 排出ライン
L3 洗浄液供給ライン
L4 洗浄液排出ライン
Claims (7)
- 液体により表面が濡れた状態の基板を超臨界流体と接触させて、前記液体を前記超臨界流体と置換することで前記基板の乾燥処理を行う乾燥処理部と、
前記乾燥処理部に設けられ前記乾燥処理部から流体を排出する排出ラインと、
前記排気ラインに設けられ前記乾燥処理部から排出される前記流体に対する光学情報を取得する取得部と、
前記取得部によって取得された前記光学情報に基づいて前記乾燥処理部内の前記液体の有無を検出する検出部とを備える
基板処理装置。 - 前記検出部によって検出された前記乾燥処理部内の前記液体の有無が、前記乾燥処理を開始してから所定時間経過しても前記液体が前記超臨界流体に置換されていない状態である場合、警告を行う警告部を備える
請求項1に記載の基板処理装置。 - 前記検出部は、
前記光学情報に基づいて前記超臨界流体による前記液体の置換完了を検出し、
前記乾燥処理部は、
前記検出部によって前記置換完了が検出された場合、前記乾燥処理を終了する
請求項1または2に記載の基板処理装置。 - 前記取得部は、
前記乾燥処理部から排出された前記流体を撮影して画像データを取得し、
前記検出部は、
前記画像データに基づいて前記乾燥処理部内の前記液体の有無を検出する
請求項1から3のいずれか一つに記載の基板処理装置。 - 前記取得部は、
前記乾燥処理部から排出された前記流体に対する吸光度を測定し、
前記検出部は、
前記吸光度に基づいて前記乾燥処理部内の前記液体の有無を検出する
請求項1から4のいずれか一つに記載の基板処理装置。 - 前記排出ラインに設けられ、前記取得部によって前記光学情報が取得される際に光を透過する透過窓と、
前記透過窓を洗浄する洗浄液を前記排出ラインに供給する洗浄液供給部を備える
請求項1から5のいずれか一つに記載の基板処理装置。 - 液体により表面が濡れた状態の基板を超臨界流体と接触させて、前記液体を前記超臨界流体と置換することで前記基板を乾燥させる乾燥処理工程と、
前記基板を乾燥させる乾燥処理部から流体を排出する排出ラインにおいて、前記乾燥処理部から排出された前記流体に対する光学情報を取得する取得工程と、
前記取得工程によって取得された前記光学情報に基づいて前記乾燥処理部内の前記液体の有無を検出する検出工程とを含む
基板処理方法。
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KR20220129467A (ko) | 2021-03-16 | 2022-09-23 | 도쿄엘렉트론가부시키가이샤 | 기판 처리 장치 및 기판 처리 방법 |
US11901197B2 (en) | 2021-03-16 | 2024-02-13 | Tokyo Electron Limited | Substrate processing apparatus and substrate processing method |
TWI812465B (zh) * | 2021-09-14 | 2023-08-11 | 日商斯庫林集團股份有限公司 | 基板處理裝置及基板處理方法 |
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KR102489837B1 (ko) | 2023-01-18 |
CN110462792A (zh) | 2019-11-15 |
JP6735905B2 (ja) | 2020-08-05 |
CN110462792B (zh) | 2023-05-16 |
US20200020550A1 (en) | 2020-01-16 |
KR20190126140A (ko) | 2019-11-08 |
JPWO2018173861A1 (ja) | 2020-01-16 |
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