JP2006352002A - Resist pump - Google Patents

Resist pump Download PDF

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JP2006352002A
JP2006352002A JP2005179135A JP2005179135A JP2006352002A JP 2006352002 A JP2006352002 A JP 2006352002A JP 2005179135 A JP2005179135 A JP 2005179135A JP 2005179135 A JP2005179135 A JP 2005179135A JP 2006352002 A JP2006352002 A JP 2006352002A
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resist
chamber
diaphragm
discharge
pump
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Hiroshi Inoue
弘 井上
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a resist pump capable of preventing an air bubble from being generated in a resist during the delivery of the resist, increasing the discharge of the resist, and quickly confirming the air bubble when the air bubble is generated in the resist. <P>SOLUTION: A diaphragm 4 is arranged in a pump body 2 which is configured to divide the inside of the pump body backward and forward, and is displaced back and forth by an air cylinder 3. Its front is formed as a resist chamber 5, and the back is formed as an air chamber 6. A discharge port 2a to which a discharge pipe 7 is connected is formed in the upper section of the resist chamber 5, a suction port 2b to which an inhalation pipe 9 is connected is formed in the lower section, a non-return valve 8 is arranged in the suction port 2b, and a reverse flow preventing means which opens and closes while being linked with the backward and forward displacement of the diaphragm 4 is formed in the discharge pipe 7. Then, the resist is sucked through the suction port 2b in the resist chamber 5 according to the increase/decrease of the capacity of the resist chamber 5 accompanied by the backward and forward displacement of the diaphragm 4, and the resist is discharged from the resist chamber 5 through the discharge port 2a. The front face of the resist chamber 5 is formed of a transparent board 10 so that the inside of the resist chamber 5 can be viewed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、半導体ウエハの露光工程の前段階において、ウエハ上面にレジストを塗布するためのレジストポンプに関し、特に、気泡を発生させることなくレジストを送液できるレジストポンプに関する。   The present invention relates to a resist pump for applying a resist to the upper surface of a wafer in a pre-stage of an exposure process of a semiconductor wafer, and more particularly to a resist pump capable of feeding a resist without generating bubbles.

半導体ウエハの露光工程の前段階では、ウエハ上面にレジストを塗布する際に、ウエハを高速回転させ、ノズルからウエハの中心にレジストを滴下してウエハ上面に一様にレジストを塗布する方法が採用されている。   In the previous stage of the semiconductor wafer exposure process, when applying the resist on the wafer top surface, the wafer is rotated at high speed, and the resist is dropped from the nozzle to the center of the wafer to uniformly apply the resist on the wafer top surface. Has been.

ノズルにレジストを送液するためのレジストポンプとして、いわゆるベローズポンプを使用したものがある。ベローズポンプのポンプ室には、吐出管が接続される吐出口と、吸入管が接続される吸入口とが設けられ、吸入管はレジスト貯槽部に、吐出管はノズルにそれぞれ連通している。前記吸入口にはレジストのポンプ室への流入のみを許容する逆止弁が、前記吐出口にはレジストのポンプ室からの流出のみを許容する逆止弁がそれぞれ設けられ、ポンプ室には蛇腹状のベローズが設けられている。このベローズポンプでは、べローズを軸方向に伸縮させることにより、レジスト貯槽部からレジストをポンプ室に吸入し、ベローズを軸方向に伸長させることにより、ポンプ室が加圧されてレジストが吐出管から排出されるようになっている(例えば、特許文献1参照。)。
特開平7−130627号公報
As a resist pump for feeding a resist to a nozzle, there is one using a so-called bellows pump. A pump chamber of the bellows pump is provided with a discharge port to which a discharge pipe is connected and a suction port to which a suction pipe is connected. The suction pipe communicates with the resist storage tank section, and the discharge pipe communicates with the nozzle. The suction port is provided with a check valve that allows only the resist to flow into the pump chamber, and the discharge port is provided with a check valve that allows only the resist to flow out from the pump chamber. A shaped bellows is provided. In this bellows pump, the bellows is expanded and contracted in the axial direction to suck the resist from the resist storage tank into the pump chamber, and the bellows is extended in the axial direction to pressurize the pump chamber and remove the resist from the discharge pipe. It is designed to be discharged (see, for example, Patent Document 1).
JP-A-7-130627

しかし、上述のものでは、2つの逆止弁やベローズの伸縮などにより、レジストは、流域によって体積が大きく絞られたり膨らみながら送液され、レジスト中に気泡が発生するおそれがあった。また、この気泡の発生を防止するためには、ゆっくりとした一定の流速でレジストを送液しなければならず、ノズルからのレジストの吐出量に制約があった。さらに、送液中に気泡が発生した場合、この気泡は、ウエハ上面に塗布されるまで確認することができず、ウエハの露光工程に大きなロスが生じていた。   However, in the above-described one, the resist is fed while the volume is greatly squeezed or swelled by the basin due to expansion and contraction of the two check valves and the bellows, and there is a possibility that bubbles are generated in the resist. In addition, in order to prevent the generation of bubbles, the resist must be fed at a slow and constant flow rate, and there is a restriction on the amount of resist discharged from the nozzle. Further, when bubbles are generated during liquid feeding, the bubbles cannot be confirmed until they are applied to the upper surface of the wafer, and a large loss occurs in the wafer exposure process.

そこで本発明は、レジストの送液中に、レジストに気泡が発生することを防止するとともに、レジストの吐出量を大きくすることができ、さらに、レジストに気泡が発生した場合には、速やかに気泡の確認ができるレジストポンプを提供することを目的としている。   Therefore, the present invention can prevent bubbles from being generated in the resist during the liquid transfer of the resist, and can increase the discharge amount of the resist. Further, when bubbles are generated in the resist, It is an object to provide a resist pump that can confirm the above.

上記の目的を達成するため本発明は、ポンプ本体に、ポンプ本体内部を前後に仕切り、駆動手段によって往復変位するダイヤフラムを配設し、前方をレジスト室、後方を空気室とし、前記レジスト室の上部に吐出管が接続される吐出口を、下部に吸入管が接続される吸入口をそれぞれ形成し、該吸入口に逆止弁を配設し、前記吐出管に前記ダイヤフラムの往復変位に連動して開閉する逆流防止手段を設け、前記ダイヤフラムの往復変位に伴うレジスト室の容積の増減によって、レジストを前記吸入口を介してレジスト室に吸入し、前記吐出口を介してレジスト室から吐出するとともに、前記レジスト室の前面を透明板で形成し、前記レジスト室の内部を視認できるようにしたことを特徴とし、前記駆動手段がエアシリンダであっても良く、前記逆流防止手段がポペット弁であると好適である。   In order to achieve the above object, the present invention provides the pump body with a diaphragm that divides the inside of the pump body back and forth, and that is reciprocally displaced by the driving means. The front is a resist chamber and the rear is an air chamber. A discharge port to which the discharge pipe is connected is formed at the upper part, and a suction port to which the suction pipe is connected to the lower part is formed, and a check valve is provided at the suction port, and the discharge pipe is linked to the reciprocal displacement of the diaphragm. Thus, a backflow prevention means for opening and closing is provided, and the resist is sucked into the resist chamber through the suction port and discharged from the resist chamber through the discharge port as the volume of the resist chamber increases or decreases with the reciprocal displacement of the diaphragm. In addition, the front surface of the resist chamber is formed of a transparent plate so that the inside of the resist chamber can be visually recognized, and the driving means may be an air cylinder. Backflow prevention means is preferable to be a poppet valve.

本発明は上述のように構成されることにより、レジストは、吸入管から吐出管まで体積が大きく絞られたり膨らんだりすることなく送液され、レジストに気泡が発生するおそれがなく、吐出量も大きくすることができる。さらに、レジスト室の前面を透明板としたことにより、貯槽のレジストに気泡が発生していた場合に、この気泡を速やかに確認し、処置をすることができるのでウエハの露光工程を良好な状態で行うことができる。   Since the present invention is configured as described above, the resist is fed from the suction pipe to the discharge pipe without being squeezed or swelled, and there is no risk of bubbles being generated in the resist, and the discharge amount is also high. Can be bigger. Furthermore, since the front surface of the resist chamber is made of a transparent plate, if bubbles are generated in the resist in the storage tank, the bubbles can be quickly confirmed and treated so that the wafer exposure process is in a good condition. Can be done.

また、駆動手段をエアシリンダとすることにより、空気がクッションとなってダイヤフラムが無理なく動き、レジストをスムーズに送液することができる。   Further, by using an air cylinder as the driving means, air acts as a cushion and the diaphragm moves without difficulty, so that the resist can be fed smoothly.

以下、本発明の一形態例を図面に基づいて詳しく説明する。図1は本発明の一形態例を示すレジストポンプの断面図、図2はポペット弁の一部断面正面図、図3はレジストの供給ラインを示す概略図である。   Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a resist pump showing one embodiment of the present invention, FIG. 2 is a partial sectional front view of a poppet valve, and FIG. 3 is a schematic view showing a resist supply line.

本形態例のレジストポンプ1は、ポンプ本体2内に、ポンプ本体内部を前後に仕切り、エアシリンダ3によって往復変位するダイヤフラム4を配設し、前方をレジスト室5、後方を空気室6としている。レジスト室5の上部には吐出管7が接続される吐出口2aが、下部には逆止弁8を備えるとともに、吸入管9が接続される吸入口2bがそれぞれ設けられ、ダイヤフラム4の往復変位に伴うレジスト室5の容積の増減によって、レジストを吸入口2bを介してレジスト室5に吸入し、吐出口2aを介してレジスト室5から吐出するようにしている。また、レジスト室5の前面は透明板10で形成され、レジスト室5の内部を視認できるようになっている。   In the resist pump 1 of this embodiment, a pump body 2 is divided into a pump body 2 and a diaphragm 4 that is reciprocally displaced by an air cylinder 3 is disposed in the pump body 2. The front is a resist chamber 5 and the rear is an air chamber 6. . A discharge port 2 a to which the discharge pipe 7 is connected is provided at the upper part of the resist chamber 5, and a check valve 8 is provided at the lower part and a suction port 2 b to which the suction pipe 9 is connected. As the volume of the resist chamber 5 increases or decreases, the resist is sucked into the resist chamber 5 through the suction port 2b and discharged from the resist chamber 5 through the discharge port 2a. The front surface of the resist chamber 5 is formed of a transparent plate 10 so that the inside of the resist chamber 5 can be visually recognized.

ポンプ本体2は、円筒状に形成された前方のケース本体2cと、有底円筒状に形成された後方のカバー体2dとを有し、ケース本体2cの周壁上部に前記吐出口2aが、周壁下部に前記吸入口2bがそれぞれ穿設される。また、ケース本体2cの前方開口部には、該前方開口部を覆う前記透明板10を支持した支持枠11が取り付けられ、後方開口部には、前記カバー体2dの前方開口部が、ダイヤフラム4を挟持して連結される。カバー体2dは、後部壁2eの下部に脚部12がボルトによって取り付けられ、後部壁2eの中心部には、エアシリンダ3のピストン挿通孔2fが穿設され、後部壁2eの後方に、エアシリンダ3を収容するエアシリンダケース13が取り付けられている。   The pump body 2 has a front case body 2c formed in a cylindrical shape and a rear cover body 2d formed in a bottomed cylindrical shape, and the discharge port 2a is formed on the peripheral wall upper portion of the case body 2c. The suction ports 2b are formed in the lower part. A support frame 11 that supports the transparent plate 10 covering the front opening is attached to the front opening of the case body 2c, and the front opening of the cover body 2d is attached to the diaphragm 4 at the rear opening. Are connected. The cover body 2d has a leg 12 attached to the lower portion of the rear wall 2e with a bolt, a piston insertion hole 2f of the air cylinder 3 is drilled in the center of the rear wall 2e, and an air is provided behind the rear wall 2e. An air cylinder case 13 that accommodates the cylinder 3 is attached.

ダイヤフラム4は、円盤状に形成され、中央に保持部材挿通孔4aを備え、外周側が、前記ケース本体2cの後方開口部と前記カバー体2dの前方開口部との間に挟着されている。ダイヤフラム4の中央部は、両側に、保持部材挿通孔4aから突出する突部を備えた円盤状の前方保持部材14aと、前記突部を嵌合する嵌合孔を備えた円盤状の後方保持部材14bとが配設され、ダイヤフラム4は、前記保持部材挿通孔4aから突出した前方保持部材14aの突部を、後方保持部材14bの嵌合孔に嵌合し、中央部をボルト15で締結することによって、前方保持部材14aと後方保持部材14bとで挟持される。後方保持部材14bの後部中央には、係合突部が突設され、該係合突部に、エアシリンダ3のピストン3aの先端が連結される。このようにダイヤフラム4を配設することによって、該ダイヤフラム4の前面と、ケース本体2cの内周面と、透明板10とによってレジスト室5が画成され、前記ダイヤフラム4の後面と、カバー体2dの内面とによって空気室6が画成される。   The diaphragm 4 is formed in a disc shape and includes a holding member insertion hole 4a at the center, and the outer peripheral side is sandwiched between the rear opening of the case body 2c and the front opening of the cover body 2d. The central portion of the diaphragm 4 has a disc-shaped front holding member 14a having protrusions protruding from the holding member insertion holes 4a on both sides, and a disk-shaped rear holding member having fitting holes for fitting the protrusions. The diaphragm 4 is fitted with the protrusion of the front holding member 14a protruding from the holding member insertion hole 4a into the fitting hole of the rear holding member 14b, and the center portion is fastened with the bolt 15. By doing so, it is clamped by the front holding member 14a and the rear holding member 14b. An engagement protrusion is provided at the rear center of the rear holding member 14b, and the tip of the piston 3a of the air cylinder 3 is connected to the engagement protrusion. By disposing the diaphragm 4 in this way, a resist chamber 5 is defined by the front surface of the diaphragm 4, the inner peripheral surface of the case body 2c, and the transparent plate 10, and the rear surface of the diaphragm 4 and the cover body An air chamber 6 is defined by the inner surface of 2d.

エアシリンダ3は、第1電磁弁16及びスピードコントローラ17a,17bを備えたエア供給ライン3b,3cを介して給排される加圧空気によって、ピストン3aが前進・後退する周知のもので、エアシリンダ3のシリンダ孔底部側には、エア供給ライン3bの接続口3dが、シリンダ孔先端側には、エア供給ライン3cの接続口3eがそれぞれ形成されている。   The air cylinder 3 is a well-known type in which the piston 3a moves forward and backward by pressurized air supplied and discharged via air supply lines 3b and 3c including a first electromagnetic valve 16 and speed controllers 17a and 17b. A connection port 3d of the air supply line 3b is formed on the cylinder hole bottom side of the cylinder 3, and a connection port 3e of the air supply line 3c is formed on the tip side of the cylinder hole.

ピストン3aは、前記カバー体2dのピストン挿通孔2fを介して、前記空気室6内に出没可能に設けられ、エア供給ライン3bの接続口3dからシリンダ孔内に加圧空気が導入されると、エア供給ライン3cの接続口3eから加圧空気を排出させながらシリンダ孔内を前進し、ダイヤフラム4を前進させる。また、エア供給ライン3cの接続口3eからシリンダ孔内に加圧空気が導入されると、エア供給ライン3bの接続口3dから加圧空気を排出させながらシリンダ孔内を後退し、ダイヤフラム4を後退させる。   The piston 3a is provided in the air chamber 6 through the piston insertion hole 2f of the cover body 2d so as to be able to protrude and retract, and when pressurized air is introduced into the cylinder hole from the connection port 3d of the air supply line 3b. Then, while the pressurized air is discharged from the connection port 3e of the air supply line 3c, the inside of the cylinder hole is advanced, and the diaphragm 4 is advanced. When pressurized air is introduced into the cylinder hole from the connection port 3e of the air supply line 3c, the compressed air is discharged from the connection port 3d of the air supply line 3b, and the diaphragm 4 is retracted. Retreat.

逆止弁8は、前記レジスト室5へのレジストの流入を自由とする一方弁で、前記吸入口2bに連続する弁室8aと、該弁室8aに保持される球弁8bと、該球弁8bによって開閉される弁座8cと、球弁8bの上動を規制するストップピン8dとから形成されている。   The check valve 8 is a one-way valve that allows the resist to freely flow into the resist chamber 5, and includes a valve chamber 8a that continues to the suction port 2b, a ball valve 8b that is held in the valve chamber 8a, and the ball valve The valve seat 8c is opened and closed by the valve 8b, and a stop pin 8d that restricts the upward movement of the ball valve 8b.

このように形成されたレジストポンプ1は、エアシリンダ3を作動させ、ダイヤフラム4を後退させてレジスト室5の容積を拡大させることにより、前記吸入口2bからレジストをレジスト室5内に吸入し、また、ダイヤフラム4を前進させてレジスト室5の容積を縮小させることにより、前記吐出口2aを介してレジスト室5からレジストを吐出する。   The resist pump 1 formed in this way operates the air cylinder 3, retracts the diaphragm 4, and expands the volume of the resist chamber 5, thereby sucking the resist into the resist chamber 5 from the suction port 2b. Further, by moving the diaphragm 4 forward to reduce the volume of the resist chamber 5, the resist is discharged from the resist chamber 5 through the discharge port 2a.

本形態例では、前記吐出管7にレジストの逆流を防止するポペット弁20が連結されている。ポペット弁20は、弁ボディ21に、弁孔22が形成され、該弁孔22に弁バネを介して弁棒23が摺動自在に挿入されている。弁孔22は、先端側に大径部22aが形成されるとともに、弁ボディ21の基端側と先端側の側部とに空気配管接続口21a,21bが形成され、先端側の側部に形成されたレジスト流入ポート21cと、先端に形成されたレジスト流出ポート21dとが弁孔22を介して連通している。弁棒23には、小径の摺動軸部23aの先端に、シール部23bを備えた大径のポペット23cが形成され、該ポペット23cは、前記大径部22aに収容され、前記大径部22aの基端側がポペット23cの弁座22bとなる。また、空気配管接続口21aと空気配管接続口21bとには、第2電磁弁24とスピードコントローラ25a,25bとを備えた接続チューブ26a,26bが接続され、レジスト出力ポート21dには、ノズルが連結されている。   In this embodiment, a poppet valve 20 for preventing the resist from flowing backward is connected to the discharge pipe 7. In the poppet valve 20, a valve hole 22 is formed in a valve body 21, and a valve rod 23 is slidably inserted into the valve hole 22 via a valve spring. The valve hole 22 has a large-diameter portion 22a on the distal end side, air piping connection ports 21a and 21b formed on the proximal end side and the distal end side portion of the valve body 21, and the distal end side portion. The formed resist inflow port 21 c communicates with the resist outflow port 21 d formed at the tip through the valve hole 22. The valve stem 23 is formed with a large-diameter poppet 23c having a seal portion 23b at the tip of a small-diameter sliding shaft portion 23a. The poppet 23c is accommodated in the large-diameter portion 22a, and the large-diameter portion The base end side of 22a becomes the valve seat 22b of the poppet 23c. Further, connection tubes 26a and 26b each having a second solenoid valve 24 and speed controllers 25a and 25b are connected to the air piping connection port 21a and the air piping connection port 21b, and a nozzle is connected to the resist output port 21d. It is connected.

ポペット弁20は、空気配管接続口21aから加圧空気が導入されると、空気配管接続口21bから加圧空気を排出させながら弁棒23が前進し、ポペット23cが弁座22bから離れて、レジスト流入ポート21cとレジスト流出ポート21dとが連通する。また、空気配管接続口21bから加圧空気が導入されると、空気配管接続口21aから加圧空気を排出させながら弁棒23が後退し、ポペット23cが弁座22bに着座し、レジスト流入ポート21cとレジスト流出ポート21dとの連通が遮断される。   In the poppet valve 20, when pressurized air is introduced from the air pipe connection port 21a, the valve rod 23 advances while discharging the pressurized air from the air pipe connection port 21b, and the poppet 23c moves away from the valve seat 22b. The resist inflow port 21c and the resist outflow port 21d communicate with each other. Further, when pressurized air is introduced from the air piping connection port 21b, the valve rod 23 moves backward while discharging the pressurized air from the air piping connection port 21a, the poppet 23c is seated on the valve seat 22b, and the resist inflow port. Communication between 21c and resist outflow port 21d is blocked.

また、前記レジストポンプ1側の第1電磁弁16と、ポペット弁20側の第2電磁弁24とは、制御部30によって、その切り替えが制御されている。   The switching of the first electromagnetic valve 16 on the registration pump 1 side and the second electromagnetic valve 24 on the poppet valve 20 side is controlled by the control unit 30.

次に、図3に基づいて、上述のレジストポンプ1を用いたレジストの供給ラインについて説明する。レジストポンプ1の吸入管9をレジストの貯槽27に連通させ、制御部30によって第1電磁弁16を切り替え、スピードコントローラ17a,17bによって給排動作を調整しながら、エア供給ライン3b,3cを介して、エアシリンダ3の接続口3d,3eから加圧空気を給排することにより、ピストン3aを前進または後退させ、ダイヤフラム4を往復変位させる。このダイヤフラム4の往復変位に伴うレジスト室5の容積の増減によって、貯槽27内のレジストが吸入管9を介してレジスト室5に吸入され、吐出管7を介してレジスト室5からポペット弁20に吐出される。   Next, a resist supply line using the above-described resist pump 1 will be described with reference to FIG. The suction pipe 9 of the resist pump 1 is communicated with the resist storage tank 27, the first electromagnetic valve 16 is switched by the control unit 30, and the supply / discharge operation is adjusted by the speed controllers 17a and 17b via the air supply lines 3b and 3c. Then, by supplying and discharging pressurized air from the connection ports 3d and 3e of the air cylinder 3, the piston 3a is moved forward or backward, and the diaphragm 4 is reciprocally displaced. As the volume of the resist chamber 5 increases or decreases with the reciprocal displacement of the diaphragm 4, the resist in the storage tank 27 is sucked into the resist chamber 5 through the suction pipe 9, and is transferred from the resist chamber 5 to the poppet valve 20 through the discharge pipe 7. Discharged.

このとき、レジストは、吸入管9から吐出管7まで体積が大きく絞られたり膨らんだりすることなく送液されるので、レジストに気泡が発生するおそれがなく、吐出量も大きくすることができる。さらに、レジスト室5の前面を透明板10で形成したことにより、送液中にレジストに気泡が発生してしまったり、あるいは貯槽27内のレジストに、既に気泡が発生していた場合には、この気泡を視認することができ、送液を中止して速やかに気泡の処置をすることができる。このため、ウエハの露光工程をロスなく良好な状態で行うことができる。   At this time, since the resist is fed from the suction pipe 9 to the discharge pipe 7 without the volume being greatly reduced or swelled, there is no possibility that bubbles are generated in the resist, and the discharge amount can be increased. Further, by forming the front surface of the resist chamber 5 with the transparent plate 10, bubbles are generated in the resist during liquid feeding, or when bubbles are already generated in the resist in the storage tank 27, This bubble can be visually recognized, and liquid supply can be stopped and the bubble can be quickly treated. Therefore, the wafer exposure process can be performed in a good state without loss.

ポペット弁20は、制御部30によって、ダイヤフラム4の往復変位に応じて第2電磁弁24を切り替え、スピードコントローラ25a,25bによって給排動作を調整しながら、接続チューブ26a,26bを介して空気配管接続口21a,21bから加圧空気を給排し、弁棒23を作動させて、レジスト流入ポート21cとレジスト流出ポート21dとを連通させたり連通を遮断させることにより、定量のレジストをノズルからウエハ上面に滴下する。   The poppet valve 20 switches the second electromagnetic valve 24 according to the reciprocal displacement of the diaphragm 4 by the control unit 30, and adjusts the supply / discharge operation by the speed controllers 25a and 25b, and the air piping through the connection tubes 26a and 26b. Pressurized air is supplied / exhausted from the connection ports 21a and 21b, the valve rod 23 is operated, and the resist inflow port 21c and the resist outflow port 21d are connected to each other or the communication is interrupted, whereby a predetermined amount of resist is transferred from the nozzle to the wafer. Drip on top.

制御部30は、第1電磁弁16をピストン前進側に切り替えるのと同時に、第2電磁弁24がポペット弁20の開方向に切り替わるように制御し、第1電磁弁16をピストン後退側に切り替えた後、少し遅れて、第2電磁弁24がポペット弁20の閉方向に切り替わるように制御している。   The control unit 30 controls the second electromagnetic valve 24 to switch in the opening direction of the poppet valve 20 at the same time as switching the first electromagnetic valve 16 to the piston forward side, and switches the first electromagnetic valve 16 to the piston backward side. After that, the second electromagnetic valve 24 is controlled to switch in the closing direction of the poppet valve 20 with a little delay.

最大吐出量:40cc、最大吐出圧力:0.2MPa、吐出流量:20cc/10秒、繰返し吐出精度:10cc±0.1cc、使用空気圧:0.15〜0.4MPaのレジストポンプを用いて、900cP及び3000cPのレジストの吐出動作を、表1に示すように吐出時間を変えて行った。   Maximum discharge amount: 40 cc, maximum discharge pressure: 0.2 MPa, discharge flow rate: 20 cc / 10 seconds, repeated discharge accuracy: 10 cc ± 0.1 cc, working air pressure: 900 cP using a resist pump with 0.15-0.4 MPa As shown in Table 1, the discharge operation of the 3000 cP resist was performed by changing the discharge time.

初期設定は、ポンプ動作圧力を0.35MPaに設定し、レジストを投入せずに空動作にて吐出動作を4秒行い、シリンダ動作を、スピードコントローラによって吸引動作40秒に調整した。レジスト投入後、ポンプ動作圧力を変更し、各圧力での吐出量を計測した。吐出動作は60秒毎とした。また、900cPのレジストは、東京応化工業(株)製PMER P−LA900 PM、3000cpのレジストは、東京応化工業(株)製PMER N−CA3000 PMを使用した。

Figure 2006352002
In the initial setting, the pump operating pressure was set to 0.35 MPa, the discharge operation was performed for 4 seconds by the idle operation without introducing the resist, and the cylinder operation was adjusted to 40 seconds by the speed controller. After introducing the resist, the pump operating pressure was changed, and the discharge amount at each pressure was measured. The discharge operation was performed every 60 seconds. Moreover, Tokyo Ohka Kogyo Co., Ltd. PMER P-LA900 PM was used for the 900 cP resist, and Tokyo Ohka Kogyo Co., Ltd. PMER N-CA3000 PM was used for the 3000 cp resist.
Figure 2006352002

表1に示されるように、上述のレジストポンプは、吐出量を大きくすることができるとともに、安定した吐出量を確保することができる。また、上記テスト中に、レジストポンプ内での発泡は見られず、レジスト初期吸入時のエアの抜けも良好であった。   As shown in Table 1, the above-described resist pump can increase the discharge amount and ensure a stable discharge amount. Further, during the above test, no foaming was observed in the resist pump, and air escape during initial resist inhalation was good.

レジストポンプの動作圧を0.30MPaとし、ポリミドの吐出テストを、表2に示すように吐出時間を変えて行った。ポリミドは、東レ製 UR−3140 5000〜10000cPを使用した。

Figure 2006352002
The operation pressure of the resist pump was 0.30 MPa, and the polyimide discharge test was performed while changing the discharge time as shown in Table 2. As the polyimide, UR-3140 5000-10000 cP manufactured by Toray Industries, Inc. was used.
Figure 2006352002

表2に示されるように、高粘度のポリミドを用いても吐出量を大きくすることができた。また、上記テスト中に、レジストポンプ内での発泡は見られず、レジスト初期吸入時のエアの抜けも良好であった。   As shown in Table 2, the discharge amount could be increased even when a high viscosity polyimide was used. Further, during the above test, no foaming was observed in the resist pump, and air escape during initial resist inhalation was good.

さらに、安定最小吐出量は、ポンプ動作圧:0.2MPa、吐出時間5秒で、4.2gであった。   Furthermore, the stable minimum discharge amount was 4.2 g at a pump operating pressure of 0.2 MPa and a discharge time of 5 seconds.

本発明の一形態例を示すレジストポンプの断面図である。It is sectional drawing of the resist pump which shows one example of this invention. 同じくポペット弁の一部断面正面図である。It is a partial cross section front view of the same poppet valve. 同じくレジストの供給ラインを示す概略図である。It is the schematic which shows the supply line of a resist similarly.

符号の説明Explanation of symbols

1…レジストポンプ、2…ポンプ本体、2a…吐出口、2b…吸入口、2c…ケース本体、2d…カバー本体、2e…後部壁、2f…ピストン挿通孔、3…エアシリンダ、3a…ピストン、3b,3c…エア供給ライン、3d,3e…接続口、4…ダイヤフラム、4a…保持部材挿通孔、5…レジスト室、6…空気室、7…吐出管、8…逆止弁、8a…弁室、8b…球弁、8c…弁座、8d…ストップピン、9…吸入管、10…透明板、11…支持枠、12…脚部、13…エアシリンダケース、14a…前方保持部材、14b…後方保持部材、15…ボルト、16…第1電磁弁、17a,17b,25a,25b…スピードコントローラ、20…ポペット弁、21…弁ボディ、21a,21b…空気配管接続口、21c…レジスト流入ポート、21d…レジスト流出ポート、22…弁孔、22a…大径部、22b…弁座、23…弁棒、23a…摺動軸部、23b…シール部、23c…ポペット、24…第2電磁弁、26a,26b…接続チューブ、27…貯槽   DESCRIPTION OF SYMBOLS 1 ... Registration pump, 2 ... Pump main body, 2a ... Discharge port, 2b ... Suction port, 2c ... Case main body, 2d ... Cover main body, 2e ... Rear wall, 2f ... Piston insertion hole, 3 ... Air cylinder, 3a ... Piston, 3b, 3c ... Air supply line, 3d, 3e ... Connection port, 4 ... Diaphragm, 4a ... Holding member insertion hole, 5 ... Registration chamber, 6 ... Air chamber, 7 ... Discharge pipe, 8 ... Check valve, 8a ... Valve Chamber 8b Ball valve 8c Valve seat 8d Stop pin 9 Suction pipe 10 Transparent plate 11 Support frame 12 Leg 13 Air cylinder case 14a Front holding member 14b ... rear holding member, 15 ... bolt, 16 ... first solenoid valve, 17a, 17b, 25a, 25b ... speed controller, 20 ... poppet valve, 21 ... valve body, 21a, 21b ... air piping connection port, 21c ... resist inflow port 21d ... Registration outflow port, 22 ... Valve hole, 22a ... large diameter part, 22b ... valve seat, 23 ... valve rod, 23a ... sliding shaft part, 23b ... seal part, 23c ... poppet, 24 ... second solenoid valve, 26a, 26b ... connecting tube, 27 ... storage tank

Claims (3)

ポンプ本体に、ポンプ本体内部を前後に仕切り、駆動手段によって往復変位するダイヤフラムを配設し、前方をレジスト室、後方を空気室とし、前記レジスト室の上部に吐出管が接続される吐出口を、下部に吸入管が接続される吸入口をそれぞれ形成し、該吸入口に逆止弁を配設し、前記吐出管に前記ダイヤフラムの往復変位に連動して開閉する逆流防止手段を設け、前記ダイヤフラムの往復変位に伴うレジスト室の容積の増減によって、レジストを前記吸入口を介してレジスト室に吸入し、前記吐出口を介してレジスト室から吐出するとともに、前記レジスト室の前面を透明板で形成し、前記レジスト室の内部を視認できるようにしたことを特徴とするレジストポンプ。 The pump body is provided with a diaphragm that divides the inside of the pump body in the front and back, and that is reciprocally displaced by a driving means. The front is a resist chamber, the rear is an air chamber, and a discharge port to which a discharge pipe is connected to the upper portion of the resist chamber. A suction port to which a suction pipe is connected at the bottom, a check valve is provided at the suction port, and a backflow prevention means that opens and closes in conjunction with the reciprocal displacement of the diaphragm is provided in the discharge pipe, The resist is sucked into the resist chamber through the suction port and discharged from the resist chamber through the discharge port by the increase / decrease of the volume of the resist chamber accompanying the reciprocal displacement of the diaphragm. A resist pump formed and made visible inside the resist chamber. 前記駆動手段がエアシリンダであることを特徴とする請求項1記載のレジストポンプ。 2. The registration pump according to claim 1, wherein the driving means is an air cylinder. 前記逆流防止手段がポペット弁であることを特徴とする請求項1又は2記載のレジストポンプ。 3. The resist pump according to claim 1, wherein the backflow prevention means is a poppet valve.
JP2005179135A 2005-06-20 2005-06-20 Resist pump Pending JP2006352002A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200035810A (en) 2018-09-27 2020-04-06 가부시키가이샤 이와키 Reciprocating pump

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Publication number Priority date Publication date Assignee Title
JPS63130973A (en) * 1986-11-21 1988-06-03 Takeshi Hoya Valve device structure
JPH0953566A (en) * 1995-08-11 1997-02-25 Koganei Corp Diaphragm pump
JPH09151854A (en) * 1995-11-29 1997-06-10 Hitachi Ltd Chemical feeding device
JPH1061556A (en) * 1996-08-22 1998-03-03 Toray Ind Inc Diaphragm pump and manufacture of color filter using diaphragm pump
JPH10281071A (en) * 1997-04-02 1998-10-20 Toray Ind Inc Diaphragm pump and color filter manufacturing method
JP2000034981A (en) * 1998-06-29 2000-02-02 Imaje Sa Diaphragm pump
JP2000329068A (en) * 1999-05-17 2000-11-28 Iwaki Co Ltd Bellows pump

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63130973A (en) * 1986-11-21 1988-06-03 Takeshi Hoya Valve device structure
JPH0953566A (en) * 1995-08-11 1997-02-25 Koganei Corp Diaphragm pump
JPH09151854A (en) * 1995-11-29 1997-06-10 Hitachi Ltd Chemical feeding device
JPH1061556A (en) * 1996-08-22 1998-03-03 Toray Ind Inc Diaphragm pump and manufacture of color filter using diaphragm pump
JPH10281071A (en) * 1997-04-02 1998-10-20 Toray Ind Inc Diaphragm pump and color filter manufacturing method
JP2000034981A (en) * 1998-06-29 2000-02-02 Imaje Sa Diaphragm pump
JP2000329068A (en) * 1999-05-17 2000-11-28 Iwaki Co Ltd Bellows pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200035810A (en) 2018-09-27 2020-04-06 가부시키가이샤 이와키 Reciprocating pump

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