WO2022014329A1 - 液処理装置、液供給機構、液処理方法及びコンピュータ記憶媒体 - Google Patents
液処理装置、液供給機構、液処理方法及びコンピュータ記憶媒体 Download PDFInfo
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- WO2022014329A1 WO2022014329A1 PCT/JP2021/024724 JP2021024724W WO2022014329A1 WO 2022014329 A1 WO2022014329 A1 WO 2022014329A1 JP 2021024724 W JP2021024724 W JP 2021024724W WO 2022014329 A1 WO2022014329 A1 WO 2022014329A1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
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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
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
Definitions
- the present disclosure relates to a liquid treatment apparatus, a liquid supply mechanism, a liquid treatment method, and a computer storage medium.
- Patent Document 1 discloses a liquid treatment apparatus including a substrate processing unit that performs liquid treatment on a substrate and a processing liquid supply mechanism that supplies the processing liquid to the substrate processing unit.
- the processing liquid supply mechanism has a flow rate controller that controls the flow rate of the processing liquid supplied to the substrate processing unit. Further, the flow rate controller has a variable orifice that changes the flow cross-sectional area of the processing liquid, a flow rate adjusting member that adjusts the flow rate by changing the cross-sectional area of the variable orifice, and an actuator that moves the flow rate adjusting member up and down. ing.
- the technique according to the present disclosure suppresses the retention of particles in the adjusting valve that adjusts the flow rate or pressure of the processing liquid supplied to the substrate.
- One aspect of the present disclosure is a liquid treatment apparatus that supplies a treatment liquid onto a substrate to treat the substrate, and the treatment liquid is applied to a substrate holding portion that holds the substrate and a substrate that is held by the substrate holding portion.
- the adjustment valve is provided in the processing liquid supply pipe and includes an adjustment valve for opening and closing the supply path and a control unit for controlling the adjustment valve.
- the adjustment valve has a diaphragm and a valve body, and the diaphragm has a diaphragm and a valve body.
- a resist coating process in which a resist liquid is applied to the surface of a semiconductor wafer (hereinafter referred to as “wafer”) to form a resist film, and the resist film is exposed to a desired pattern.
- a series of processes such as an exposure process and a development process for developing an exposed resist film are sequentially performed, and a desired resist pattern is formed on the wafer.
- the liquid treatment apparatus disclosed in Patent Document 1 is used as an apparatus for supplying a treatment liquid such as a resist liquid or a developing liquid to a wafer for liquid treatment.
- the flow rate controller (adjustment valve) of this liquid treatment device uses a so-called direct acting regulator that can variably control the flow cross-sectional area of the treatment liquid by an actuator.
- a pilot type regulator may be used for the flow rate controller.
- the pilot type regulator has a diaphragm that moves up and down by the pressure of the driving air, and a valve body that changes the cross-sectional area of the processing liquid supply path. Then, the valve body is operated via the diaphragm to change the cross-sectional area of the supply path of the treatment liquid, thereby controlling the flow rate of the treatment liquid.
- the regulator is provided in the processing liquid supply path on the downstream side of the filter for removing particles in order to suppress the flow rate fluctuation, and the cleanliness of the regulator has a high possibility of directly affecting the wafer.
- particles may already exist in the initial state of the regulator, or particles may be contained in the processing liquid.
- FIG. 1 is a vertical sectional view showing an outline of the configuration of the liquid treatment apparatus 1.
- FIG. 2 is a cross-sectional view showing an outline of the configuration of the liquid treatment apparatus 1.
- the liquid treatment device 1 has a treatment container 10 whose inside can be closed.
- a wafer W loading / unloading outlet 11 is formed on the side surface of the processing container 10, and an opening / closing shutter 12 is provided at the loading / unloading port 11.
- a spin chuck 20 as a substrate holding portion for holding and rotating the wafer W is provided in the central portion of the processing container 10.
- the spin chuck 20 has a horizontal upper surface, and for example, a suction port (not shown) for sucking the wafer W is provided on the upper surface. By suction from this suction port, the wafer W can be sucked and held on the spin chuck 20.
- the spin chuck 20 has a chuck drive mechanism 21 provided with, for example, a motor, and can be rotated to a desired speed by the chuck drive mechanism 21. Further, the chuck drive mechanism 21 is provided with an elevating drive source such as a cylinder, and the spin chuck 20 can move up and down.
- a chuck drive mechanism 21 provided with, for example, a motor, and can be rotated to a desired speed by the chuck drive mechanism 21. Further, the chuck drive mechanism 21 is provided with an elevating drive source such as a cylinder, and the spin chuck 20 can move up and down.
- a cup 22 for receiving and collecting the liquid scattered or falling from the wafer W is provided.
- An exhaust pipe 23 for discharging the collected liquid and an exhaust pipe 24 for exhausting the atmosphere in the cup 22 are connected to the lower surface of the cup 22.
- a rail 30 extending along the X-axis direction is formed on the negative side of the cup 22 in the Y-axis direction.
- the rail 30 is formed, for example, from the outer side of the cup 22 on the negative direction side in the X-axis direction to the outer side on the positive direction side in the X-axis direction.
- An arm 31 is attached to the rail 30.
- the arm 31 is supported by a discharge nozzle 32 that discharges the processing liquid.
- the arm 31 is movable on the rail 30 by the nozzle drive unit 33.
- the discharge nozzle 32 can move from the standby portion 34 installed on the outer side of the cup 22 on the positive side in the X-axis direction to above the center of the wafer W in the cup 22, and further on the surface of the wafer W. It can move in the radial direction of the wafer W.
- the arm 31 can be raised and lowered by the nozzle driving unit 33, and the height of the discharge nozzle 32 can be adjusted.
- the discharge nozzle 32 is connected to a liquid supply mechanism 40 that supplies the processing liquid. The details of the configuration of the liquid supply mechanism 40 will be described later.
- the liquid processing apparatus 1 described above is provided with a control unit 50.
- the control unit 50 is, for example, a computer equipped with a CPU, a memory, or the like, and has a program storage unit (not shown).
- the program storage unit stores a program for controlling the liquid processing of the wafer W in the liquid processing apparatus 1.
- the program may be recorded on a storage medium H readable by a computer and may be installed on the control unit 50 from the storage medium H.
- the wafer W When the wafer W is carried into the liquid processing apparatus 1, the wafer W is adsorbed and held on the upper surface of the spin chuck 20. Next, after the ejection nozzle 32 is moved above the central portion of the wafer W, the processing liquid is ejected from the ejection nozzle 32 to the central portion of the wafer W while rotating the wafer W. At this time, the processing liquid is supplied from the liquid supply mechanism 40 to the discharge nozzle 32. Then, the processing liquid on the wafer W is diffused over the entire surface of the wafer, and the wafer W is liquid-treated. The liquid-treated wafer W is carried out from the liquid treatment apparatus 1.
- FIG. 3 is an explanatory diagram showing an outline of the configuration of the liquid supply mechanism 40.
- the liquid supply mechanism 40 has a treatment liquid supply source 100 that stores the treatment liquid inside and supplies the treatment liquid to the discharge nozzle 32, and a treatment liquid supply pipe 101 that connects the treatment liquid supply source 100 and the discharge nozzle 32. Be prepared. A supply path through which the treatment liquid flows is formed inside the treatment liquid supply pipe 101.
- one treatment liquid supply source 100 is commonly provided in the liquid supply mechanisms 40 of the plurality of liquid treatment devices 1.
- a plurality of treatment liquid supply pipes 101 are connected to one treatment liquid supply source 100, and each treatment liquid supply pipe 101 is connected to each discharge nozzle 32.
- the treatment liquid supply pipe 101 is provided with a first regulator 102, a pressure gauge 103, a filter 104, a second regulator 105 as a regulating valve, a flow rate detection unit 106, and a first on-off valve 107 in this order from the upstream side. Has been done.
- the first regulator 102 adjusts the pressure of the processing liquid flowing inside the processing liquid supply pipe 101.
- the type of the first regulator 102 is not particularly limited, but for example, a known regulator is used.
- the pressure gauge 103 measures the pressure of the processing liquid adjusted by the first regulator 102.
- the filter 104 collects and removes particles in the treatment liquid.
- a drain pipe (not shown) for exhausting the gas (air bubbles) generated in the treatment liquid may be provided on the upper part of the filter 104.
- the second regulator 105 adjusts the flow rate of the processing liquid flowing inside the processing liquid supply pipe 101. The details of the configuration of the second regulator 105 will be described later.
- An air supply pipe 110 that supplies air to the air supply unit 133 of the second regulator 105 is connected to the second regulator 105, as will be described later.
- the air supply pipe 110 communicates with an air supply source 111 that stores air inside. Further, the air supply pipe 110 is provided with a valve 112 for controlling the supply of air. The valve 112 opens and closes the air supply path inside the air supply pipe 110.
- the flow rate detection unit 106 measures the flow rate of the processing liquid whose flow rate has been adjusted by the second regulator 105.
- the first on-off valve 107 opens and closes the processing liquid supply path inside the processing liquid supply pipe 101.
- an air operated valve Air Operated Valve
- a treatment liquid discharge pipe 120 having a discharge path for discharging the treatment liquid is connected to the treatment liquid supply pipe 101 between the second regulator 105 and the flow rate detection unit 106.
- the treatment liquid discharge pipe 120 of each liquid supply mechanism 40 merges and is connected to a liquid drain tank (not shown).
- the processing liquid discharge pipe 120 is provided with a second on-off valve 121 before merging.
- the second on-off valve 121 opens and closes the processing liquid discharge path inside the processing liquid discharge pipe 120.
- an air operated valve is used for the second on-off valve 121.
- FIG. 4 is a vertical cross section showing an outline of the configuration of the second regulator 105.
- the second regulator 105 has a main body 130, two sockets 131 and 132, an air supply unit 133, a diaphragm 134, a valve 135 as a valve body, and a spring 136.
- the main body 130 is connected to the processing liquid supply pipe 101 on the upstream side via the first socket 131. Further, the main body 130 is connected to the processing liquid supply pipe 101 on the downstream side via the second socket 132. That is, the treatment liquid supply pipe 101, the first socket 131, the main body 130, the second socket 132, and the treatment liquid supply pipe 101 are connected in this order from the upstream side. Further, the insides of the treatment liquid supply pipe 101, the first socket 131, the main body 130, the second socket 132, and the treatment liquid supply pipe 101 communicate with each other to form a treatment liquid supply path 140.
- the supply path 140 inside the main body 130 passes through the opening 141 formed inside the main body 130.
- the upstream side of the opening 141 may be referred to as a supply path 140a, and the downstream side may be referred to as a supply path 140b.
- the air supply unit 133 is provided above the main body unit 130.
- the above-mentioned air supply pipe 110 is connected to the air supply unit 133, and the air inside the air supply source 111 is supplied to the air supply unit 133.
- the air supply unit 133 is configured to be able to supply air (hereinafter, referred to as “driving air”) to the diaphragm 134 at a desired pressure.
- driving air air
- the configuration of the air supply unit 133 is arbitrary and can be appropriately configured by the designer.
- the diaphragm 134 is provided inside the main body 130, above the opening 141 and on the air supply unit 133 side.
- a supply path 140 for the treatment liquid more specifically, a supply path 140b is formed on the lower surface side of the diaphragm 134.
- the diaphragm 134 is configured to be vertically movable by the drive air supplied from the air supply unit 133.
- the valve 135 is provided below the diaphragm 134 inside the main body 130.
- the valve 135 extends in the vertical direction so as to pass through the opening 141. That is, the valve 135 is provided through the opening 141 over the supply path 140a on the upstream side and the supply path 140b on the downstream side.
- a plurality of springs 136 are provided inside the lower part of the valve 135.
- the spring 136 urges the valve 135 upward.
- a protruding portion 135a protruding from the valve body is formed on the side surface of the valve 135.
- the protrusion 135a is provided below the opening 141, that is, on the supply path 140a side. Further, the upper surface of the protruding portion 135a is inclined so that the width increases from the upper side to the lower side in the side view.
- the valve 135 is urged upward by the spring 136. Further, as the diaphragm 134 moves up and down due to the drive air, the valve 135 also moves up and down. Then, for example, as shown in FIG. 4, when the protrusion 135a is located below the opening 141 and a gap is formed between the opening 141 and the valve 135, the supply path 140 is opened and processed. The liquid circulates. On the other hand, for example, as shown in FIG. 5, when the gap between the opening 141 and the valve 135 disappears, the supply path 140 is closed and the flow of the processing liquid is cut off. In this way, the valve 135 opens and closes the supply path 140.
- the opening / closing operation of the supply path 140 by the valve 135 will be described in more detail.
- the open / closed state of the supply path 140 at the opening 141 is controlled by the pressing pressure P1 of the diaphragm 134 by the drive air, the pushing pressure P2 of the valve 135 by the spring 136, and the pressure P3 of the processing liquid flowing through the supply path 140.
- the pushing pressure P1 of the driving air is a pressure acting downward
- the pushing pressure P2 of the spring 136 and the pressure P3 of the processing liquid are pressures acting upward, respectively.
- the open / closed state of the supply path 140 is controlled by balancing the pressing pressure P1 of the driving air, the pressing pressure P2 of the spring 136, and the pressure P3 of the processing liquid.
- a concave portion 134a is formed on the lower surface of the diaphragm 134, and a convex portion 135b is formed on the upper end of the valve 135.
- the concave portion 134a and the convex portion 135b have matching shapes, and the convex portion 135b is fitted into the concave portion 134a to form a joint portion 142 between the diaphragm 134 and the valve 135.
- the diaphragm 134 and the valve 135 are joined by the joint portion 142 of the concave portion 134a and the convex portion 135b.
- the concave portion 134a and the convex portion 135b are not adhered to each other, and there is a slight gap. In such a case, particles tend to stay in the gaps in the joint portion 142, and once the particles stay, they are difficult to remove. As described above, there are various factors for generating particles.
- normal dispensing the method of repeating the normal dispensing of the treatment liquid.
- the particles cannot be completely removed.
- the particles may flow out from the second regulator 105 into the processing liquid at a certain timing and be supplied to the wafer W. Therefore, in the conventional cleaning method, the cleanliness of the second regulator 105 is unstable. Further, in the conventional cleaning method, it takes time to return the second regulator 105, whose cleanliness has deteriorated, to a normal state.
- the normal dispense means that the opening degree of the processing liquid supply path 140 is adjusted by the valve 135 of the second regulator 105, the first opening / closing valve 107 is opened, and the processing liquid is discharged from the discharge nozzle 32.
- the state of ejection Specifically, the drive air is supplied to the diaphragm 134 by the air supply unit 133 at a constant pressing pressure, and the valve 135 is operated via the diaphragm 134 to adjust the opening degree of the supply path 140. Then, when the processing liquid is discharged from the discharge nozzle 32, the pressure of the processing liquid becomes small, so that the pressure for pushing down the diaphragm 134 becomes large. Then, the open state of the supply path 140 becomes large.
- the range of pressure fluctuation of the processing liquid in normal discharge is small, and the stroke (movable range) of the vertical movement of the diaphragm 134 and the valve 135 is also small. Therefore, the particles staying in the joint portion 142 are difficult to be discharged, and the particles cannot be completely removed.
- the opening and closing of the valve 112 is controlled to supply and stop the drive air by the air supply unit 133.
- the pressure for supplying the driving air is set by the specifications of the flow rate of the processing liquid, and is, for example, 0.15 MPa.
- the diaphragm 134 and the valve 135 move up and down due to the drive air, so the stroke can be increased. Then, since the movement of the diaphragm 134 and the valve 135 in the joint portion 142 to be close to each other and to be separated from each other becomes large, the particles staying in the joint portion 142 can be appropriately discharged and removed. As a result, the cleanliness of the second regulator 105 can be stabilized. Further, it is possible to return the second regulator 105, whose cleanliness has deteriorated, to a normal state in a short time.
- the drive air it is preferable to repeatedly supply and stop the drive air, but the number of repetitions is not limited. Further, the drive air may be supplied and stopped only once.
- FIG. 7 is an explanatory diagram showing the experimental results.
- the regulator of this embodiment was washed as an example, and normal discharge was performed as a comparative example. Then, after cleaning the regulator and performing normal dispensing, the number of particles in the processing liquid discharged from the discharge nozzle 32, specifically, the number of particles having a diameter of 20 nm or more was measured.
- the horizontal axis of FIG. 7 shows the number of times the valve 135 is driven, and the vertical axis shows the number of particles.
- the number of times the valve 135 is driven in the regulator cleaning (full stroke drive of the valve 135) is the number of times the drive air is supplied and stopped by the air supply unit 133.
- the number of times the valve 135 is driven in the normal discharge (driving the normal valve 135) is the number of times the opening / closing operation of the first opening / closing valve 107 is performed.
- the number of particles increases sharply at the first time. This indicates that the strokes of the diaphragm 134 and the valve 135 were increased by the first supply and stop of the drive air, and the particles staying in the second regulator 105 were discharged at once. In other words, it indicates that the instability factor of the cleanliness of the second regulator 105 has been eliminated. Then, by repeatedly supplying and stopping the driving air, the number of particles approaches zero.
- the effect that the cleanliness of the second regulator 105 can be stabilized is obtained by the cleaning method of the second regulator 105 in the present embodiment.
- Such periodic cleaning is performed while the liquid treatment is not performed on the wafer W, that is, in a state where the processing liquid is not supplied to the wafer W from the ejection nozzle 32.
- Step S1 is a state in which the discharge nozzle 32 is waiting on the standby unit 34.
- step S1 the first on-off valve 107 and the second on-off valve 121 are closed, and the second regulator 105 is opened.
- Step S2 Second state
- the second regulator 105 is cleaned and the regulator cleaning described above is performed.
- the first on-off valve 107 is closed and the second on-off valve 121 is opened.
- the drive air is repeatedly supplied and stopped so that the second regulator 105 opens and closes in the open state and the fully closed state. Then, the strokes of the diaphragm 134 and the valve 135 can be increased, and as a result, the particles staying in the joint portion 142 can be appropriately discharged and removed. Therefore, the cleanliness of the second regulator 105 can be stabilized.
- step S2 the treatment liquid containing particles after the regulator cleaning is performed is discharged from the treatment liquid discharge pipe 120.
- the particles do not flow out to the downstream side of the first on-off valve 107, cleaning on the downstream side can be omitted.
- step S1 and step S2 are performed to complete the periodic cleaning of the second regulator 105.
- step S2 in the periodic cleaning of the second regulator 105 may be performed at a timing set based on the number of processed wafers W. For example, after liquid treatment is performed on a plurality of wafers W in lot units, regulator cleaning in step S2 may be performed. Alternatively, the regulator cleaning in step S2 may be performed every time the liquid treatment is performed on one wafer W.
- step S2 may be performed at a timing set based on the elapsed time from the completion of the liquid treatment of the wafer W.
- the regulator cleaning in step S2 may be performed after a predetermined time has elapsed after the liquid treatment of the first wafer W is performed.
- FIG. 8 is an explanatory diagram showing an outline of the configuration of the liquid supply mechanism 200.
- the liquid supply mechanism 200 omits the processing liquid discharge pipe 120 and the second on-off valve 121 in the liquid supply mechanism 40 of the above embodiment. Other configurations of the liquid supply mechanism 200 are the same as those of the liquid supply mechanism 40.
- Step T1 is a state in which the discharge nozzle 32 is waiting on the standby unit 34.
- the first on-off valve 107 is closed and the second regulator 105 is open.
- Step T2 cleans the second regulator 105 and the regulator cleaning described above.
- the first open / close valve 107 is opened.
- the drive air is repeatedly supplied and stopped so that the second regulator 105 opens and closes in the open state and the fully closed state.
- the strokes of the diaphragm 134 and the valve 135 can be increased as in step S2 of the above embodiment, and as a result, the particles staying in the joint portion 142 can be appropriately discharged and removed.
- step T2 the processing liquid containing particles after the regulator cleaning is performed is discharged from the discharge nozzle 32.
- the discharge nozzle 32 is on standby at the standby unit 34, and so-called dummy discharge of the processing liquid is performed. Then, in the standby unit 34, the processing liquid containing the particles is collected and discarded.
- step T1 and step T2 are performed to complete the periodic cleaning of the second regulator 105.
- the step T2 of the present embodiment is performed while the discharge nozzle 32 is waiting on the standby unit 34, but the discharge nozzle 32 is located above the wafer W held by the spin chuck 20. May be done at. Specifically, for example, when the processing liquid is started to be discharged from the discharge nozzle 32 to the wafer W, step T2 is performed. After the step T2 is completed, the second regulator 105 supplies the driving air to the diaphragm 134 at a desired pressing pressure to bring the second regulator 105 into a desired open state. Then, the processing liquid is supplied from the discharge nozzle 32 to the wafer W, and the liquid treatment is performed on the wafer W.
- step T2 since the regulator cleaning in step T2 is performed on a single sheet for each liquid treatment of the wafer W, the cleanliness of the second regulator 105 can always be maintained.
- the second regulator 105 is used to adjust the flow rate of the processing liquid, but the present invention is not limited to this, and the second regulator 105 adjusts the pressure of the processing liquid (for example, pressure). It may be used for suppressing fluctuations).
- Liquid processing device 20 Spin chuck 32 Discharge nozzle 50 Control unit 100 Processing liquid supply source 101 Processing liquid supply pipe 105 Second regulator 134 Diaphragm 135 Valve 140 Supply path W wafer
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Abstract
Description
先ず、本実施形態にかかる液処理装置1について説明する。液処理装置1では、基板としてのウェハWに処理液を供給して、当該ウェハWに対して液処理を行う。図1は、液処理装置1の構成の概略を示す縦断面図である。図2は、液処理装置1の構成の概略を示す横断面図である。
次に、以上のように構成された液処理装置1を用いて行われるウェハWの液処理方法について説明する。液処理装置1では、ウェハWが搬入される前、吐出ノズル32は待機部34で待機している。
次に、液供給機構40の構成について説明する。図3は、液供給機構40の構成の概略を示す説明図である。
次に、第2のレギュレータ105の構成について説明する。図4は、第2のレギュレータ105の構成の概略を示す縦断面である。
次に、第2のレギュレータ105の洗浄方法について説明する。
ステップS1は、吐出ノズル32が待機部34に待機している状態である。ステップS1では、第1の開閉バルブ107及び第2の開閉バルブ121をそれぞれ閉状態とし、かつ第2のレギュレータ105を開状態とする。
ステップS2は、第2のレギュレータ105の洗浄、上述したレギュレータ洗浄を行う。ステップS2では、第1の開閉バルブ107を閉状態とし、第2の開閉バルブ121を開状態とする。さらに、上述したように駆動エアの供給及び停止を繰り返し行い、第2のレギュレータ105が開状態と全閉状態の開閉動作を行うようにする。そうすると、ダイヤフラム134とバルブ135のストロークを大きくすることができ、その結果、接合部142に滞留するパーティクルを適切に排出して除去することができる。したがって、第2のレギュレータ105の清浄度を安定させることができる。
次に、他の実施形態にかかる液供給機構200について説明する。図8は、液供給機構200の構成の概略を示す説明図である。
ステップT1は、吐出ノズル32が待機部34に待機している状態である。ステップT1では、第1の開閉バルブ107を閉状態とし、かつ第2のレギュレータ105を開状態とする。
ステップT2は、第2のレギュレータ105の洗浄、上述したレギュレータ洗浄を行う。ステップT2では、第1の開閉バルブ107を開状態とする。さらに、上述したように駆動エアの供給及び停止を繰り返し行い、第2のレギュレータ105が開状態と全閉状態の開閉動作を行うようにする。かかる場合、上記実施形態のステップS2と同様に、ダイヤフラム134とバルブ135のストロークを大きくすることができ、その結果、接合部142に滞留するパーティクルを適切に排出して除去することができる。
20 スピンチャック
32 吐出ノズル
50 制御部
100 処理液供給源
101 処理液供給管
105 第2のレギュレータ
134 ダイヤフラム
135 バルブ
140 供給路
W ウェハ
Claims (20)
- 基板上に処理液を供給して、基板を液処理する液処理装置であって、
基板を保持する基板保持部と、
前記基板保持部に保持された基板に処理液を吐出する吐出ノズルと、
処理液を供給する処理液供給源と、
前記処理液供給源に接続され、前記吐出ノズルに供給される処理液が流通する供給路が形成された処理液供給管と、
前記処理液供給管に設けられ、前記供給路の開閉動作を行う調整バルブと、
前記調整バルブを制御する制御部と、を備え、
前記調整バルブは、ダイヤフラムと弁体を有し、前記ダイヤフラムに対するエアの供給を制御し、前記ダイヤフラムを介して前記弁体を動作させて、前記供給路の開状態と全閉状態の開閉動作を行う、液処理装置。 - 前記調整バルブよりも下流側の前記処理液供給管に設けられ、前記供給路の開閉動作を行う第1の開閉バルブと、
前記調整バルブと第1の開閉バルブとの間の前記処理液供給管に接続され、処理液を排出する排出路が形成された処理液排出管と、
前記処理液排出管に設けられ、前記排出路の開閉動作を行う第2の開閉バルブと、を備え、
前記制御部は、
前記第1の開閉バルブ及び前記第2の開閉バルブが閉状態であって、前記調整バルブが開状態である第1の状態と、
前記第1の開閉バルブが閉状態であり、前記第2の開閉バルブが開状態であって、前記調整バルブが開状態と全閉状態の開閉動作を行う第2の状態と、を切り替えるように、前記調整バルブ、前記第1の開閉バルブ及び第2の開閉バルブを制御する、請求項1に記載の液処理装置。 - 前記処理液排出管は、前記液処理装置とは異なる他の装置に設けられた排液管と合流する、請求項2に記載の液処理装置。
- 前記調整バルブよりも下流側の前記処理液供給管に設けられ、前記供給路の開閉動作を行う開閉バルブを備え、
前記制御部は、
前記開閉バルブが閉状態であって、前記調整バルブが開状態である第1の状態と、
前記開閉バルブが開状態であって、前記調整バルブが開状態と全閉状態の開閉動作を行う第2の状態と、を切り替えるように、前記調整バルブ及び前記開閉バルブを制御する、請求項1に記載の液処理装置。 - 前記制御部は、前記第2の状態が、前記吐出ノズルから基板に処理液を供給中に行われるように、前記吐出ノズルを制御する、請求項4に記載の液処理装置。
- 前記制御部は、前記第2の状態が、前記基板保持部より側方にある待機位置に前記吐出ノズルが待機している状態で行われるように、前記吐出ノズルを制御する、請求項2~4のいずれか一項に記載の液処理装置。
- 前記制御部は、前記第2の状態において、前記調整バルブの開閉動作が複数回行われるように、前記調整バルブを制御する、請求項2~6のいずれか一項に記載の液処理装置。
- 前記制御部は、前記第2の状態が、基板の処理枚数又は基板の処理が終了してからの経過時間に基づいて設定されるタイミングで行われるように制御する、請求項2~7のいずれか一項に記載の液処理装置。
- 前記調整バルブよりも上流側の前記処理液供給管に設けられ、処理液中の異物を除去するフィルタを備える、請求項1~8のいずれか一項に記載の液処理装置。
- 前記ダイヤフラムには凹部が形成され、
前記弁体には、前記凹部に適合する形状を有する凸部が形成されている、請求項1~9のいずれか一項に記載の液処理装置。 - 基板に処理液を吐出する吐出ノズルに対し、当該処理液を供給する液供給機構であって、
処理液を供給する処理液供給源と、
前記処理液供給源に接続され、前記吐出ノズルに供給される処理液が流通する供給路が形成された処理液供給管と、
前記処理液供給管に設けられ、前記供給路の開閉動作を行う調整バルブと、
前記調整バルブを制御する制御部と、を備え、
前記調整バルブは、ダイヤフラムと弁体を有し、前記ダイヤフラムに対するエアの供給を制御し、前記ダイヤフラムを介して前記弁体を動作させて、前記供給路の開状態と全閉状態の開閉動作を行う、液供給機構。 - 前記調整バルブよりも下流側の前記処理液供給管に設けられ、前記供給路の開閉動作を行う第1の開閉バルブと、
前記調整バルブと第1の開閉バルブとの間の前記処理液供給管に接続され、処理液を排出する排出路が形成された処理液排出管と、
前記処理液排出管に設けられ、前記排出路の開閉動作を行う第2の開閉バルブと、を備え、
前記制御部は、
前記第1の開閉バルブ及び前記第2の開閉バルブが閉状態であって、前記調整バルブが開状態である第1の状態と、
前記第1の開閉バルブが閉状態であり、前記第2の開閉バルブが開状態であって、前記調整バルブが開状態と全閉状態の開閉動作を行う第2の状態と、を切り替えるように、前記調整バルブ、前記第1の開閉バルブ及び第2の開閉バルブを制御する、請求項11に記載の液供給機構。 - 前記調整バルブよりも下流側の前記処理液供給管に設けられ、前記供給路の開閉動作を行う開閉バルブを備え、
前記制御部は、
前記開閉バルブが閉状態であって、前記調整バルブが開状態である第1の状態と、
前記開閉バルブが開状態であって、前記調整バルブが開状態と全閉状態の開閉動作を行う第2の状態と、を切り替えるように、前記調整バルブ及び前記開閉バルブを制御する、請求項11に記載の液供給機構。 - 液処理装置を用いて、基板上に処理液を供給し、基板を液処理する液処理方法であって、
前記液処理装置は、
基板を保持する基板保持部と、
前記基板保持部に保持された基板に処理液を吐出する吐出ノズルと、
処理液を供給する処理液供給源と、
前記処理液供給源に接続され、前記吐出ノズルに供給される処理液が流通する供給路が形成された処理液供給管と、
前記処理液供給管に設けられ、ダイヤフラムと弁体を有し、前記供給路の開閉動作を行う調整バルブと、を備え、
前記液処理方法では、
前記ダイヤフラムに対するエアの供給を制御し、前記ダイヤフラムを介して前記弁体を動作させて、前記供給路の開状態と全閉状態の開閉動作を行い、調整バルブを洗浄する、液処理方法。 - 前記液処理装置は、
前記調整バルブよりも下流側の前記処理液供給管に設けられ、前記供給路の開閉動作を行う第1の開閉バルブと、
前記調整バルブと第1の開閉バルブとの間の前記処理液供給管に接続され、処理液を排出する排出路が形成された処理液排出管と、
前記処理液排出管に設けられ、前記排出路の開閉動作を行う第2の開閉バルブと、を備え、
前記液処理方法は、
(a)前記第1の開閉バルブ及び前記第2の開閉バルブが閉状態であって、前記調整バルブが開状態である工程と、
(b)前記第1の開閉バルブが閉状態であり、前記第2の開閉バルブが開状態であって、前記調整バルブが開状態と全閉状態の開閉動作を行う工程と、含む、請求項14に記載の液処理方法。 - 前記液処理装置は、
前記調整バルブよりも下流側の前記処理液供給管に設けられ、前記供給路の開閉動作を行う開閉バルブを備え、
前記液処理方法は、
(a)前記開閉バルブが閉状態であって、前記調整バルブが開状態である工程と、
(b)前記開閉バルブが開状態であって、前記調整バルブが開状態と全閉状態の開閉動作を行う工程と、を含む、請求項14に記載の液処理方法。 - 前記(b)工程は、前記吐出ノズルから基板に処理液を供給中に行われる、請求項16に記載の液処理方法。
- 前記(b)工程は、前記基板保持部より側方にある待機位置に前記吐出ノズルが待機している状態で行われる、請求項15~17のいずれか一項に記載の液処理方法。
- 前記(b)工程において、前記調整バルブの開閉動作が複数回行われる、請求項15~18のいずれか一項に記載の液処理方法。
- 基板上に処理液を供給して、基板を液処理する液処理方法を液処理装置によって実行させるように、当該液処理装置を制御する制御部のコンピュータ上で動作するプログラムを格納した読み取り可能なコンピュータ記憶媒体であって、
前記液処理装置は、
基板を保持する基板保持部と、
前記基板保持部に保持された基板に処理液を吐出する吐出ノズルと、
処理液を供給する処理液供給源と、
前記処理液供給源に接続され、前記吐出ノズルに供給される処理液が流通する供給路が形成された処理液供給管と、
前記処理液供給管に設けられ、ダイヤフラムと弁体を有し、前記供給路の開閉動作を行う調整バルブと、を備え、
前記液処理方法では、
前記ダイヤフラムに対するエアの供給を制御し、前記ダイヤフラムを介して前記弁体を動作させて、前記供給路の開状態と全閉状態の開閉動作を行い、調整バルブを洗浄する、コンピュータ記憶媒体。
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