JP6294256B2 - Substrate liquid processing apparatus, substrate liquid processing method, and computer readable storage medium storing substrate liquid processing program - Google Patents

Substrate liquid processing apparatus, substrate liquid processing method, and computer readable storage medium storing substrate liquid processing program Download PDF

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JP6294256B2
JP6294256B2 JP2015063749A JP2015063749A JP6294256B2 JP 6294256 B2 JP6294256 B2 JP 6294256B2 JP 2015063749 A JP2015063749 A JP 2015063749A JP 2015063749 A JP2015063749 A JP 2015063749A JP 6294256 B2 JP6294256 B2 JP 6294256B2
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佐藤　秀明
秀明 佐藤
高志 永井
高志 永井
大海 原
大海 原
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Description

本発明は、基板を処理するための処理液が流れる処理液流路を洗浄流体で洗浄する基板液処理装置及び基板液処理方法並びに基板液処理プログラムを記憶したコンピュータ読み取り可能な記憶媒体に関するものである。   The present invention relates to a substrate liquid processing apparatus, a substrate liquid processing method, and a computer-readable storage medium storing a substrate liquid processing program for cleaning a processing liquid flow path through which a processing liquid for processing a substrate flows with a cleaning fluid. is there.

半導体部品やフラットパネルディスプレイなどの製造には、半導体ウエハや液晶基板などの基板を洗浄液やエッチング液などの処理液で処理する基板液処理装置が用いられている。   For manufacturing semiconductor components and flat panel displays, a substrate liquid processing apparatus for processing a substrate such as a semiconductor wafer or a liquid crystal substrate with a processing liquid such as a cleaning liquid or an etching liquid is used.

たとえば、特許文献１に開示された基板液処理装置では、処理槽に貯留した処理液（エッチング液：リン酸水溶液）に基板を浸漬させて、基板の表面に形成した窒化膜をエッチングする処理を行う。   For example, in the substrate liquid processing apparatus disclosed in Patent Document 1, the substrate is immersed in a processing solution (etching solution: phosphoric acid aqueous solution) stored in a processing tank, and a process of etching a nitride film formed on the surface of the substrate is performed. Do.

この基板液処理装置では、処理液としてリン酸を純水で所定の濃度に希釈したリン酸水溶液を用いている。そして、基板液処理装置では、リン酸水溶液を所定の濃度とする際に、リン酸を純水で希釈したリン酸水溶液を所定の温度で加熱して沸騰させ、リン酸水溶液の濃度をその温度（沸点）における濃度となるように制御する。また、リン酸水溶液を加熱して沸騰させた際に水分の蒸発によって濃度が変動するために、リン酸水溶液に純水を補給してリン酸水溶液が所定の濃度となるように制御する。そのため、基板液処理装置には、処理液の濃度を計測するための濃度センサが設けられている。そして、基板液処理装置では、濃度センサで計測した処理液の濃度に応じて処理液や希釈液の供給を制御する。   In this substrate solution processing apparatus, a phosphoric acid aqueous solution in which phosphoric acid is diluted with pure water to a predetermined concentration is used as a processing solution. In the substrate liquid processing apparatus, when the phosphoric acid aqueous solution is set to a predetermined concentration, the phosphoric acid aqueous solution obtained by diluting phosphoric acid with pure water is heated to a predetermined temperature to boil, and the concentration of the phosphoric acid aqueous solution is set to the temperature. The concentration is controlled to be (boiling point). Further, since the concentration fluctuates due to evaporation of water when the phosphoric acid aqueous solution is heated and boiled, pure water is supplied to the phosphoric acid aqueous solution so that the phosphoric acid aqueous solution has a predetermined concentration. Therefore, the substrate liquid processing apparatus is provided with a concentration sensor for measuring the concentration of the processing liquid. In the substrate liquid processing apparatus, the supply of the processing liquid and the dilution liquid is controlled according to the concentration of the processing liquid measured by the concentration sensor.

特開２０１３−９３４７８号公報JP 2013-93478 A

ところが、上記従来の基板液処理装置では、濃度センサの故障や配線の切断や濃度センサの接液部分の汚れなどによって濃度センサで処理液の濃度を正常に計測することができなくなった場合、基板の液処理を中断し、液処理途中の基板を廃棄している。これにより、従来の基板液処理装置では、基板の処理に無駄が生じ、歩留まりの低下を招くおそれがある。   However, in the above conventional substrate liquid processing apparatus, if the concentration sensor cannot measure the concentration of the processing liquid normally due to a failure of the concentration sensor, cutting of wiring, contamination of the liquid contact portion of the concentration sensor, etc. Liquid processing is interrupted, and the substrate in the middle of liquid processing is discarded. Thereby, in the conventional substrate liquid processing apparatus, there is a possibility that the processing of the substrate is wasted and the yield is reduced.

また、濃度センサの故障等に備えて予め予備の濃度センサを設けておくといった対策も考えられるが、それにより基板液処理装置のコストアップが生じてしまう。   In addition, a measure such as providing a preliminary concentration sensor in advance in preparation for a failure of the concentration sensor may be considered, but this increases the cost of the substrate liquid processing apparatus.

そこで、本発明では、基板液処理装置において、基板を希釈液で希釈された処理液で処理する液処理部と、前記処理液を供給する処理液供給部と、前記処理液を希釈するための希釈液を供給する希釈液供給部と、前記希釈液で希釈された処理液の濃度を計測する濃度計測部と、前記濃度計測部で計測した前記希釈液で希釈された処理液の濃度に応じて前記処理液供給部及び希釈液供給部を制御する制御部とを有し、前記制御部は、前記液処理部で前記基板の処理中に前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した場合、前記処理液及び希釈液の供給状態を予め決められた供給状態で維持するように前記処理液供給部及び希釈液供給部を制御し、前記液処理部での前記基板の処理を継続することにした。   Therefore, in the present invention, in the substrate liquid processing apparatus, a liquid processing unit for processing a substrate with a processing liquid diluted with a diluent, a processing liquid supply unit for supplying the processing liquid, and a method for diluting the processing liquid Depending on the concentration of the treatment liquid diluted with the dilution liquid measured by the concentration measurement section, the concentration measurement section for measuring the concentration of the treatment liquid diluted with the dilution liquid, the dilution liquid supply section for supplying the dilution liquid A control unit that controls the processing liquid supply unit and the dilution liquid supply unit, and the control unit normalizes the concentration of the processing liquid in the concentration measurement unit during processing of the substrate in the liquid processing unit. If it is determined that the measurement cannot be performed, the processing liquid supply unit and the dilution liquid supply unit are controlled to maintain the supply state of the processing liquid and the dilution liquid in a predetermined supply state, and the substrate in the liquid processing unit We decided to continue the process.

また、前記予め決められた供給状態は、
（１）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の前記処理液及び希釈液と同じ供給量で前記処理液及び希釈液を供給する状態、
（２）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の所定期間での平均した前記処理液及び希釈液の供給量で前記処理液及び希釈液を供給する状態、
（３）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の所定期間で変動する前記処理液及び希釈液の供給量で前記処理液及び希釈液を変動させて供給する状態、
のいずれかであることにした。 The predetermined supply state is:
(1) A state in which the treatment liquid and the dilution liquid are supplied in the same supply amount as the treatment liquid and the dilution liquid before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally,
(2) Supplying the treatment liquid and the dilution liquid with the supply amount of the treatment liquid and the dilution liquid averaged over a predetermined period before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally. State,
(3) The treatment liquid and the dilution liquid are changed by the supply amount of the treatment liquid and the dilution liquid that fluctuates in a predetermined period before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally. Supply condition,
Decided to be either.

また、大気圧を計測する大気圧計測部をさらに有し、前記制御部は、前記大気圧計測部で計測した大気圧が所定範囲内の場合、前記基板の処理中における前記処理液及び希釈液の供給状態を維持し、前記大気圧計測部で計測した大気圧が所定範囲外の場合、前記液処理部での前記基板の処理を中断するように制御することにした。   In addition, the control unit further includes an atmospheric pressure measurement unit that measures atmospheric pressure, and the control unit is configured to process the substrate and the diluting solution during processing of the substrate when the atmospheric pressure measured by the atmospheric pressure measurement unit is within a predetermined range. When the atmospheric pressure measured by the atmospheric pressure measuring unit is outside a predetermined range, the substrate processing in the liquid processing unit is controlled to be interrupted.

また、前記制御部は、前記濃度計測部で前記希釈液で希釈された処理液の濃度を正常に計測できる場合、前記大気圧計測部で計測した大気圧が第１所定範囲内のときと第１所定範囲外のときとで異なる処理を行い、前記濃度計測部で前記処理液の濃度を正常に計測できない場合、前記大気圧計測部で計測した大気圧が第２所定範囲内のときに前記基板の処理中における前記処理液及び希釈液の供給状態を維持し、前記大気圧計測部で計測した大気圧が第２所定範囲外のときに、前記液処理部での前記基板の処理を中断し、前記第１所定範囲よりも第２所定範囲を狭い範囲とすることにした。   In addition, when the control unit can normally measure the concentration of the treatment liquid diluted with the diluent by the concentration measurement unit, and when the atmospheric pressure measured by the atmospheric pressure measurement unit is within the first predetermined range, 1. When processing different from when outside the predetermined range is performed and the concentration measuring unit cannot measure the concentration of the processing liquid normally, when the atmospheric pressure measured by the atmospheric pressure measuring unit is within the second predetermined range, Maintaining the supply state of the processing liquid and dilution liquid during the processing of the substrate, and interrupting the processing of the substrate in the liquid processing section when the atmospheric pressure measured by the atmospheric pressure measuring section is outside the second predetermined range The second predetermined range is narrower than the first predetermined range.

また、前記希釈液は、前記処理液の加熱によって蒸発する水分を補充する純水であることにした。   Further, the dilution liquid is pure water that replenishes moisture evaporated by heating the treatment liquid.

また、本発明では、基板液処理方法において、液処理部で希釈液で希釈された処理液を用いて基板を処理し、前記基板の処理中に前記希釈液で希釈された処理液の濃度を正常に計測できなくなった場合に、前記処理液及び希釈液の供給状態を予め決められた供給状態で維持し、前記液処理部での前記基板の処理を継続することにした。   Further, in the present invention, in the substrate liquid processing method, the substrate is processed using the processing liquid diluted with the diluent in the liquid processing section, and the concentration of the processing liquid diluted with the diluent during the processing of the substrate is set. When measurement could not be performed normally, the supply state of the processing liquid and the dilution liquid was maintained in a predetermined supply state, and the processing of the substrate in the liquid processing unit was continued.

また、前記予め決められた供給状態は、
（１）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の前記処理液及び希釈液と同じ供給量で前記処理液及び希釈液を供給する状態、
（２）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の所定期間での平均した前記処理液及び希釈液の供給量で前記処理液及び希釈液を供給する状態、
（３）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の所定期間で変動する前記処理液及び希釈液の供給量で前記処理液及び希釈液を変動させて供給する状態、
のいずれかであることにした。 The predetermined supply state is:
(1) A state in which the treatment liquid and the dilution liquid are supplied in the same supply amount as the treatment liquid and the dilution liquid before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally,
(2) Supplying the treatment liquid and the dilution liquid with the supply amount of the treatment liquid and the dilution liquid averaged over a predetermined period before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally. State,
(3) The treatment liquid and the dilution liquid are changed by the supply amount of the treatment liquid and the dilution liquid that fluctuates in a predetermined period before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally. Supply condition,
Decided to be either.

また、大気圧を計測し、大気圧が所定範囲内の場合、前記基板の処理中における前記処理液及び希釈液の供給状態を維持し、大気圧が所定範囲外の場合、前記液処理部での前記基板の処理を中断することにした。   Further, when the atmospheric pressure is measured and the atmospheric pressure is within a predetermined range, the supply state of the processing liquid and the dilution liquid during the processing of the substrate is maintained, and when the atmospheric pressure is outside the predetermined range, the liquid processing unit The processing of the substrate was interrupted.

また、前記希釈液で希釈された処理液の濃度を正常に計測できる場合、大気圧が第１所定範囲内のときと第１所定範囲外のときとで異なる処理を行い、前記希釈液で希釈された処理液の濃度を正常に計測できない場合、大気圧が第２所定範囲内のときに前記基板の処理中における前記処理液及び希釈液の供給状態を維持し、大気圧が第２所定範囲外のときに、前記液処理部での前記基板の処理を中断し、前記第１所定範囲よりも第２所定範囲を狭い範囲とすることにした。   Further, when the concentration of the treatment liquid diluted with the diluent can be measured normally, different treatments are performed when the atmospheric pressure is within the first predetermined range and when the atmospheric pressure is outside the first predetermined range, and diluted with the diluent. When the concentration of the processed liquid cannot be measured normally, the supply state of the processing liquid and the dilution liquid during the processing of the substrate is maintained when the atmospheric pressure is in the second predetermined range, and the atmospheric pressure is in the second predetermined range. When outside, the processing of the substrate in the liquid processing unit is interrupted, and the second predetermined range is made narrower than the first predetermined range.

また、前記希釈液は、前記希釈液で希釈された処理液の加熱によって蒸発する水分を補充する純水であることにした。   In addition, the diluent is pure water that replenishes moisture evaporated by heating the treatment solution diluted with the diluent.

また、本発明では、基板を希釈液で希釈された処理液で処理する液処理部と、前記処理液を供給する処理液供給部と、前記処理液を希釈するための希釈液を供給する希釈液供給部と、前記希釈液で希釈された処理液の濃度を計測する濃度計測部とを有する基板液処理装置を用いて基板液処理方法を実行させる基板液処理プログラムを記憶したコンピュータ読み取り可能な記憶媒体において、前記液処理部で前記基板の処理中に前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した場合、前記処理液及び希釈液の供給状態を予め決められた供給状態で維持するように前記処理液供給部及び希釈液供給部を制御し、前記液処理部での前記基板の処理を継続することにした。   Further, in the present invention, a liquid processing unit that processes a substrate with a processing liquid diluted with a diluent, a processing liquid supply unit that supplies the processing liquid, and a dilution that supplies a diluent for diluting the processing liquid A computer-readable program storing a substrate liquid processing program for executing a substrate liquid processing method using a substrate liquid processing apparatus having a liquid supply unit and a concentration measuring unit for measuring a concentration of a processing liquid diluted with the diluent. In a storage medium, when it is determined that the concentration of the processing liquid cannot be normally measured by the concentration measurement unit during the processing of the substrate by the liquid processing unit, the supply state of the processing liquid and the dilution liquid is determined in advance. The processing liquid supply unit and the dilution liquid supply unit are controlled so as to be maintained in a state, and the processing of the substrate in the liquid processing unit is continued.

本発明では、基板の処理中に濃度計測部の故障や配線の切断や濃度センサの接液部分の汚れなどによって処理液の濃度を正常に計測できなくなっても基板の処理を継続して行うことができるので、コストアップを招くことなく歩留まりの低下を抑制することができる。   In the present invention, the substrate processing is continuously performed even if the concentration of the processing liquid cannot be normally measured due to a failure of the concentration measuring unit, cutting of the wiring, contamination of the liquid contact portion of the concentration sensor, or the like during the processing of the substrate. Therefore, it is possible to suppress a decrease in yield without increasing the cost.

基板液処理装置を示す平面説明図。Plane explanatory drawing which shows a substrate liquid processing apparatus. エッチング処理装置を示す説明図。Explanatory drawing which shows an etching processing apparatus. 基板液処理プログラムを示すフローチャート。The flowchart which shows a substrate liquid processing program. エッチング処理装置の処理液循環時の動作を示す説明図。Explanatory drawing which shows the operation | movement at the time of the process liquid circulation of an etching processing apparatus. エッチング処理装置の濃度計測時の動作を示す説明図。Explanatory drawing which shows the operation | movement at the time of the density | concentration measurement of an etching processing apparatus. エッチング処理装置の処理液及び希釈液の供給時の動作を示す説明図。Explanatory drawing which shows the operation | movement at the time of supply of the process liquid and dilution liquid of an etching processing apparatus.

以下に、本発明に係る基板液処理装置及び基板液処理方法並びに基板液処理プログラムの具体的な構成について図面を参照しながら説明する。   Hereinafter, specific configurations of a substrate liquid processing apparatus, a substrate liquid processing method, and a substrate liquid processing program according to the present invention will be described with reference to the drawings.

図１に示すように、基板液処理装置１は、キャリア搬入出部２、ロット形成部３、ロット載置部４、ロット搬送部５、ロット処理部６、制御部７を有する。   As shown in FIG. 1, the substrate liquid processing apparatus 1 includes a carrier carry-in / out unit 2, a lot forming unit 3, a lot placement unit 4, a lot transport unit 5, a lot processing unit 6, and a control unit 7.

キャリア搬入出部２は、複数枚（たとえば、25枚）の基板（シリコンウエハ）８を水平姿勢で上下に並べて収容したキャリア９の搬入及び搬出を行う。   The carrier loading / unloading unit 2 loads and unloads a carrier 9 in which a plurality of (for example, 25) substrates (silicon wafers) 8 are stored in a horizontal posture.

このキャリア搬入出部２には、複数個のキャリア９を載置するキャリアステージ10と、キャリア９の搬送を行うキャリア搬送機構11と、キャリア９を一時的に保管するキャリアストック12,13と、キャリア９を載置するキャリア載置台14とが設けられている。ここで、キャリアストック12は、製品となる基板８をロット処理部６で処理する前に一時的に保管する。また、キャリアストック13は、製品となる基板８をロット処理部６で処理した後に一時的に保管する。   The carrier loading / unloading unit 2 includes a carrier stage 10 on which a plurality of carriers 9 are placed, a carrier transport mechanism 11 that transports the carriers 9, carrier carriers 12, 13 that temporarily store the carriers 9, A carrier mounting table 14 on which the carrier 9 is mounted is provided. Here, the carrier stock 12 is temporarily stored before the substrate 8 as a product is processed by the lot processing unit 6. The carrier stock 13 is temporarily stored after the substrate 8 to be a product is processed by the lot processing unit 6.

そして、キャリア搬入出部２は、外部からキャリアステージ10に搬入されたキャリア９をキャリア搬送機構11を用いてキャリアストック12やキャリア載置台14に搬送する。また、キャリア搬入出部２は、キャリア載置台14に載置されたキャリア９をキャリア搬送機構11を用いてキャリアストック13やキャリアステージ10に搬送する。キャリアステージ10に搬送されたキャリア９は、外部へ搬出される。   Then, the carrier loading / unloading unit 2 transports the carrier 9 loaded into the carrier stage 10 from the outside to the carrier stock 12 and the carrier mounting table 14 using the carrier transport mechanism 11. The carrier loading / unloading unit 2 transports the carrier 9 placed on the carrier placing table 14 to the carrier stock 13 and the carrier stage 10 using the carrier carrying mechanism 11. The carrier 9 conveyed to the carrier stage 10 is carried out to the outside.

ロット形成部３は、１又は複数のキャリア９に収容された基板８を組合せて同時に処理される複数枚（たとえば、50枚）の基板８からなるロットを形成する。   The lot forming unit 3 forms a lot composed of a plurality of (for example, 50) substrates 8 to be processed simultaneously by combining the substrates 8 accommodated in one or a plurality of carriers 9.

このロット形成部３には、複数枚の基板８を搬送する基板搬送機構15が設けられている。なお、基板搬送機構15は、基板８の搬送途中で基板８の姿勢を水平姿勢から垂直姿勢及び垂直姿勢から水平姿勢に変更させることができる。   The lot forming unit 3 is provided with a substrate transfer mechanism 15 for transferring a plurality of substrates 8. The substrate transport mechanism 15 can change the posture of the substrate 8 from the horizontal posture to the vertical posture and from the vertical posture to the horizontal posture during the transportation of the substrate 8.

そして、ロット形成部３は、キャリア載置台14に載置されたキャリア９から基板搬送機構15を用いて基板８をロット載置部４に搬送し、ロット載置部４でロットを形成する。また、ロット形成部３は、ロット載置部４に載置されたロットを基板搬送機構15でキャリア載置台14に載置されたキャリア９へ搬送する。なお、基板搬送機構15は、複数枚の基板８を支持するための基板支持部として、処理前（ロット搬送部５で搬送される前）の基板８を支持する処理前基板支持部と、処理後（ロット搬送部５で搬送された後）の基板８を支持する処理後基板支持部の２種類を有している。これにより、処理前の基板８等に付着したパーティクル等が処理後の基板８等に転着するのを防止する。   The lot forming unit 3 then transports the substrate 8 from the carrier 9 placed on the carrier placing table 14 to the lot placing unit 4 using the substrate carrying mechanism 15, and the lot placing unit 4 forms a lot. Further, the lot forming unit 3 conveys the lot placed on the lot placing unit 4 to the carrier 9 placed on the carrier placing table 14 by the substrate carrying mechanism 15. The substrate transport mechanism 15 is a substrate support unit for supporting a plurality of substrates 8, a pre-process substrate support unit that supports the substrate 8 before processing (before being transported by the lot transport unit 5), and a process There are two types of post-process substrate support units that support the subsequent substrate 8 (after being transported by the lot transport unit 5). This prevents particles or the like adhering to the substrate 8 before processing from being transferred to the substrate 8 after processing.

ロット載置部４は、ロット搬送部５によってロット形成部３とロット処理部６との間で搬送されるロットをロット載置台16で一時的に載置（待機）する。   The lot placing unit 4 temporarily places (waits) the lot carried by the lot carrying unit 5 between the lot forming unit 3 and the lot processing unit 6 on the lot placing table 16.

このロット載置部４には、処理前（ロット搬送部５で搬送される前）のロットを載置する搬入側ロット載置台17と、処理後（ロット搬送部５で搬送された後）のロットを載置する搬出側ロット載置台18とが設けられている。搬入側ロット載置台17及び搬出側ロット載置台18には、１ロット分の複数枚の基板８が垂直姿勢で前後に並べて載置される。   The lot placement unit 4 includes a loading-side lot placement table 17 for placing a lot before processing (before being transported by the lot transport unit 5), and after processing (after transported by the lot transport unit 5). A carry-out lot mounting table 18 on which the lot is mounted is provided. On the carry-in lot mounting table 17 and the carry-out lot mounting table 18, a plurality of substrates 8 for one lot are placed side by side in a vertical posture.

そして、ロット載置部４では、ロット形成部３で形成したロットが搬入側ロット載置台17に載置され、そのロットがロット搬送部５を介してロット処理部６に搬入される。また、ロット載置部４では、ロット処理部６からロット搬送部５を介して搬出されたロットが搬出側ロット載置台18に載置され、そのロットがロット形成部３に搬送される。   In the lot placement unit 4, the lot formed by the lot formation unit 3 is placed on the carry-in side lot placement table 17, and the lot is carried into the lot processing unit 6 via the lot transport unit 5. In the lot placement unit 4, the lot carried out from the lot processing unit 6 via the lot transport unit 5 is placed on the carry-out side lot placement table 18, and the lot is transported to the lot forming unit 3.

ロット搬送部５は、ロット載置部４とロット処理部６との間やロット処理部６の内部間でロットの搬送を行う。   The lot transport unit 5 transports lots between the lot placing unit 4 and the lot processing unit 6 or between the lot processing units 6.

このロット搬送部５には、ロットの搬送を行うロット搬送機構19が設けられている。ロット搬送機構19は、ロット載置部４とロット処理部６に沿わせて配置したレール20と、複数枚の基板８を保持しながらレール20に沿って移動する移動体21とで構成する。移動体21には、垂直姿勢で前後に並んだ複数枚の基板８を保持する基板保持体22が進退自在に設けられている。   The lot transport unit 5 is provided with a lot transport mechanism 19 for transporting a lot. The lot transport mechanism 19 includes a rail 20 disposed along the lot placement unit 4 and the lot processing unit 6, and a moving body 21 that moves along the rail 20 while holding a plurality of substrates 8. The moving body 21 is provided with a substrate holding body 22 for holding a plurality of substrates 8 arranged in the front-rear direction in a vertical posture so as to freely advance and retract.

そして、ロット搬送部５は、搬入側ロット載置台17に載置されたロットをロット搬送機構19の基板保持体22で受取り、そのロットをロット処理部６に受渡す。また、ロット搬送部５は、ロット処理部６で処理されたロットをロット搬送機構19の基板保持体22で受取り、そのロットを搬出側ロット載置台18に受渡す。さらに、ロット搬送部５は、ロット搬送機構19を用いてロット処理部６の内部においてロットの搬送を行う。   Then, the lot transfer unit 5 receives the lot placed on the carry-in side lot mounting table 17 by the substrate holder 22 of the lot transfer mechanism 19 and delivers the lot to the lot processing unit 6. In addition, the lot transfer unit 5 receives the lot processed by the lot processing unit 6 by the substrate holder 22 of the lot transfer mechanism 19 and transfers the lot to the unloading lot mounting table 18. Further, the lot transfer unit 5 uses the lot transfer mechanism 19 to transfer the lot within the lot processing unit 6.

ロット処理部６は、垂直姿勢で前後に並んだ複数枚の基板８を１ロットとしてエッチングや洗浄や乾燥などの処理を行う。   The lot processing unit 6 performs processing such as etching, cleaning, and drying by using a plurality of substrates 8 arranged in the front and back in a vertical posture as one lot.

このロット処理部６には、基板８の乾燥処理を行う乾燥処理装置23と、基板保持体22の洗浄処理を行う基板保持体洗浄処理装置24と、基板８の洗浄処理を行う洗浄処理装置25と、基板８のエッチング処理を行う２台のエッチング処理装置26とが並べて設けられている。   The lot processing unit 6 includes a drying processing device 23 for drying the substrate 8, a substrate holder cleaning processing device 24 for cleaning the substrate holder 22, and a cleaning processing device 25 for cleaning the substrate 8. And two etching apparatuses 26 for performing the etching process of the substrate 8 are provided side by side.

乾燥処理装置23は、処理槽27に基板昇降機構28を昇降自在に設けている。処理槽27には、乾燥用の処理ガス（ＩＰＡ（イソプロピルアルコール）等）が供給される。基板昇降機構28には、１ロット分の複数枚の基板８が垂直姿勢で前後に並べて保持される。乾燥処理装置23は、ロット搬送機構19の基板保持体22からロットを基板昇降機構28で受取り、基板昇降機構28でそのロットを昇降させることで、処理槽27に供給した乾燥用の処理ガスで基板８の乾燥処理を行う。また、乾燥処理装置23は、基板昇降機構28からロット搬送機構19の基板保持体22にロットを受渡す。   The drying processing apparatus 23 is provided with a substrate elevating mechanism 28 in a processing tank 27 so as to be movable up and down. The processing tank 27 is supplied with a processing gas for drying (IPA (isopropyl alcohol) or the like). The substrate lifting mechanism 28 holds a plurality of substrates 8 for one lot side by side in a vertical posture. The drying processing device 23 receives the lot from the substrate holder 22 of the lot transport mechanism 19 by the substrate lifting mechanism 28, and lifts and lowers the lot by the substrate lifting mechanism 28, thereby using the drying processing gas supplied to the processing tank 27. The substrate 8 is dried. Further, the drying processing apparatus 23 delivers the lot from the substrate lifting mechanism 28 to the substrate holder 22 of the lot transport mechanism 19.

基板保持体洗浄処理装置24は、処理槽29に洗浄用の処理液及び乾燥ガスを供給できるようになっており、ロット搬送機構19の基板保持体22に洗浄用の処理液を供給した後、乾燥ガスを供給することで基板保持体22の洗浄処理を行う。   The substrate holder cleaning processing device 24 is configured to be able to supply a cleaning processing liquid and a dry gas to the processing tank 29, and after supplying the cleaning processing liquid to the substrate holder 22 of the lot transport mechanism 19, The substrate holder 22 is cleaned by supplying the dry gas.

洗浄処理装置25は、洗浄用の処理槽30とリンス用の処理槽31とを有し、各処理槽30，31に基板昇降機構32,33を昇降自在に設けている。洗浄用の処理槽30には、洗浄用の処理液（ＳＣ−１等）が貯留される。リンス用の処理槽31には、リンス用の処理液（純水等）が貯留される。   The cleaning processing apparatus 25 includes a cleaning processing tank 30 and a rinsing processing tank 31, and substrate processing mechanisms 32 and 33 are provided in the processing tanks 30 and 31 so as to be movable up and down. A cleaning processing solution (SC-1 or the like) is stored in the cleaning processing tank 30. The rinsing treatment tank 31 stores a rinsing treatment liquid (pure water or the like).

エッチング処理装置26は、エッチング用の処理槽34とリンス用の処理槽35とを有し、各処理槽34,35に基板昇降機構36，37を昇降自在に設けている。エッチング用の処理槽34には、エッチング用の処理液（リン酸水溶液）が貯留される。リンス用の処理槽35には、リンス用の処理液（純水等）が貯留される。   The etching processing apparatus 26 includes a processing tank 34 for etching and a processing tank 35 for rinsing, and substrate lifting mechanisms 36 and 37 are provided in the processing tanks 34 and 35 so as to be movable up and down. The etching treatment tank 34 stores an etching treatment liquid (phosphoric acid aqueous solution). The rinsing treatment tank 35 stores a rinsing treatment liquid (pure water or the like).

これら洗浄処理装置25とエッチング処理装置26は、同様の構成となっている。エッチング処理装置26について説明すると、基板昇降機構36,37には、１ロット分の複数枚の基板８が垂直姿勢で前後に並べて保持される。エッチング処理装置26は、ロット搬送機構19の基板保持体22からロットを基板昇降機構36で受取り、基板昇降機構36でそのロットを昇降させることでロットを処理槽34のエッチング用の処理液に浸漬させて基板８のエッチング処理を行う。その後、エッチング処理装置26は、基板昇降機構36からロット搬送機構19の基板保持体22にロットを受渡す。また、エッチング処理装置26は、ロット搬送機構19の基板保持体22からロットを基板昇降機構37で受取り、基板昇降機構37でそのロットを昇降させることでロットを処理槽35のリンス用の処理液に浸漬させて基板８のリンス処理を行う。その後、エッチング処理装置26は、基板昇降機構37からロット搬送機構19の基板保持体22にロットを受渡す。   The cleaning processing device 25 and the etching processing device 26 have the same configuration. The etching processing apparatus 26 will be described. The substrate elevating mechanisms 36 and 37 hold a plurality of substrates 8 for one lot side by side in a vertical posture. The etching processing apparatus 26 receives the lot from the substrate holder 22 of the lot transport mechanism 19 by the substrate lifting mechanism 36, and the substrate lifting mechanism 36 moves the lot up and down so that the lot is immersed in the etching processing liquid in the processing tank 34. Then, the substrate 8 is etched. Thereafter, the etching processing apparatus 26 delivers the lot from the substrate lifting mechanism 36 to the substrate holder 22 of the lot transport mechanism 19. In addition, the etching processing device 26 receives the lot from the substrate holder 22 of the lot transport mechanism 19 by the substrate lifting mechanism 37, and lifts the lot by the substrate lifting mechanism 37, thereby processing the lot into the processing liquid for rinsing the processing tank 35. Then, the substrate 8 is rinsed. Thereafter, the etching processing apparatus 26 delivers the lot from the substrate lifting mechanism 37 to the substrate holder 22 of the lot transport mechanism 19.

このエッチング処理装置26では、所定濃度の薬剤（リン酸）の水溶液（88.3重量％のリン酸水溶液）を処理液（エッチング液）として用いて基板８を液処理（エッチング処理）する。   In this etching processing apparatus 26, the substrate 8 is subjected to liquid processing (etching processing) using an aqueous solution (88.3% by weight phosphoric acid aqueous solution) of a chemical (phosphoric acid) having a predetermined concentration as a processing liquid (etching liquid).

エッチング処理装置26は、図２に示すように、所定濃度のリン酸水溶液（88.3重量％のリン酸水溶液）からなる処理液を貯留するとともに基板８を処理するための液処理部38と、液処理部38に処理液を供給するための処理液供給部39と、処理液を希釈する希釈液を供給するための希釈液供給部40と、液処理部38に貯留された処理液を循環させるための処理液循環部41と、液処理部38から処理液を排出する処理液排出部42とを有する。   As shown in FIG. 2, the etching processing apparatus 26 stores a processing solution made of a phosphoric acid aqueous solution having a predetermined concentration (a phosphoric acid aqueous solution of 88.3 wt%) and a liquid processing unit 38 for processing the substrate 8, A processing liquid supply unit 39 for supplying a processing liquid to the processing unit 38, a dilution liquid supply unit 40 for supplying a diluent for diluting the processing liquid, and a processing liquid stored in the liquid processing unit 38 are circulated. And a processing liquid discharge section 42 for discharging the processing liquid from the liquid processing section 38.

液処理部38は、上部を開放させた処理槽34の上部周囲に上部を開放させた外槽43を形成し、処理槽34と外槽43に処理液を貯留する。処理槽34では、基板８を基板昇降機構36によって浸漬させることで液処理する処理液を貯留する。外槽43では、処理槽34からオーバーフローした処理液を貯留するとともに、処理液循環部41によって処理槽34に処理液を供給する。   The liquid processing unit 38 forms an outer tank 43 with the upper part opened around the upper part of the processing tank 34 with the upper part opened, and stores the processing liquid in the processing tank 34 and the outer tank 43. In the processing tank 34, a processing liquid to be liquid processed is stored by immersing the substrate 8 by the substrate lifting mechanism 36. In the outer tank 43, the processing liquid overflowed from the processing tank 34 is stored, and the processing liquid is supplied to the processing tank 34 by the processing liquid circulation unit 41.

処理液供給部39は、液処理部38に処理液とは異なる濃度（処理液よりも低い濃度）の薬剤（リン酸）の水溶液（85重量％のリン酸水溶液）を供給する。この処理液供給部39は、所定濃度（８５重量％）及び所定温度（25℃）のリン酸水溶液を供給するための水溶液供給源44を液処理部38の外槽43に流量調整器45を介して接続する。流量調整器45は、制御部７に接続されており、制御部７で開閉制御及び流量制御される。   The treatment liquid supply unit 39 supplies the liquid treatment unit 38 with an aqueous solution (85% by weight phosphoric acid aqueous solution) of a drug (phosphoric acid) having a concentration different from the treatment liquid (concentration lower than the treatment liquid). The treatment liquid supply unit 39 is provided with an aqueous solution supply source 44 for supplying a phosphoric acid aqueous solution having a predetermined concentration (85 wt%) and a predetermined temperature (25 ° C.) to the outer tank 43 of the liquid treatment unit 38. Connect through. The flow rate regulator 45 is connected to the control unit 7, and the control unit 7 performs open / close control and flow rate control.

希釈液供給部40は、処理液の加熱（沸騰）によって蒸発した水分を補給するための純水を供給する。この希釈液供給部40は、所定温度（25℃）の純水を供給するための水供給源46を液処理部38の外槽43に流量調整器47を介して接続する。流量調整器47は、制御部７に接続されており、制御部７で開閉制御及び流量制御される。   The dilution liquid supply unit 40 supplies pure water for replenishing water evaporated by heating (boiling) of the processing liquid. The diluent supply unit 40 connects a water supply source 46 for supplying pure water at a predetermined temperature (25 ° C.) to the outer tank 43 of the liquid processing unit 38 via a flow rate regulator 47. The flow rate regulator 47 is connected to the control unit 7, and the control unit 7 performs open / close control and flow rate control.

処理液循環部41は、液処理部38の外槽43の底部と処理槽34の底部との間に循環流路48を形成する。循環流路48には、ポンプ49、フィルタ50、ヒータ51が順に設けられている。ポンプ49及びヒータ51は、制御部７に接続されており、制御部７で駆動制御される。そして、処理液循環部41は、ポンプ49を駆動させることで外槽43から処理槽34に処理液を循環させる。その際に、ヒータ51で処理液を所定温度（165℃）に加熱する。   The processing liquid circulation unit 41 forms a circulation channel 48 between the bottom of the outer tank 43 of the liquid processing unit 38 and the bottom of the processing tank 34. In the circulation channel 48, a pump 49, a filter 50, and a heater 51 are provided in this order. The pump 49 and the heater 51 are connected to the control unit 7 and are driven and controlled by the control unit 7. Then, the processing liquid circulating unit 41 circulates the processing liquid from the outer tank 43 to the processing tank 34 by driving the pump 49. At that time, the processing liquid is heated to a predetermined temperature (165 ° C.) by the heater 51.

また、処理液循環部41は、循環流路48の途中（ヒータ51よりも下流側）と外槽43との間に濃度計測流路52を形成する。濃度計測流路52には、上流側開閉弁53、濃度センサ54（濃度計測部）、下流側開閉弁55が順に設けられている。上流側開閉弁53と濃度センサ54との間には、濃度センサ54を洗浄するための洗浄流体（ここでは、常温の純水）を供給する洗浄流体供給部56が接続されている。この洗浄流体供給部56は、洗浄流体を供給するための洗浄流体供給源57を上流側開閉弁53と濃度センサ54との間に供給開閉弁58を介して接続する。また、濃度センサ54と下流側開閉弁55との間には、洗浄流体を排出する洗浄流体排出部59が接続されている。この洗浄流体排出部59は、濃度センサ54と下流側開閉弁55との間に外部の排液管と連通する排出流路60を接続し、排出流路60に排出開閉弁61を設けている。上流側開閉弁53、下流側開閉弁55、供給開閉弁58、及び排出開閉弁61は、制御部７に接続されており、制御部７で開閉制御される。また、濃度センサ54は、制御部７に接続されており、制御部７からの指示で濃度計測流路52を流れる処理液の濃度を計測して制御部７に通知する。なお、洗浄流体排出部59は、主に洗浄流体を排出するが、濃度計測流路52に滞留する処理液も排出する。   Further, the treatment liquid circulation unit 41 forms a concentration measurement flow path 52 between the circulation flow path 48 (on the downstream side of the heater 51) and the outer tank 43. The concentration measurement flow path 52 is provided with an upstream opening / closing valve 53, a concentration sensor 54 (concentration measuring unit), and a downstream opening / closing valve 55 in this order. A cleaning fluid supply unit 56 that supplies a cleaning fluid for cleaning the concentration sensor 54 (here, pure water at room temperature) is connected between the upstream opening / closing valve 53 and the concentration sensor 54. The cleaning fluid supply unit 56 connects a cleaning fluid supply source 57 for supplying cleaning fluid between the upstream side open / close valve 53 and the concentration sensor 54 via the supply open / close valve 58. Further, a cleaning fluid discharge part 59 for discharging the cleaning fluid is connected between the concentration sensor 54 and the downstream side open / close valve 55. This cleaning fluid discharge unit 59 connects a discharge flow path 60 communicating with an external drain pipe between the concentration sensor 54 and the downstream side open / close valve 55, and a discharge open / close valve 61 is provided in the discharge flow path 60. . The upstream opening / closing valve 53, the downstream opening / closing valve 55, the supply opening / closing valve 58, and the discharge opening / closing valve 61 are connected to the control unit 7 and are controlled to open / close by the control unit 7. The concentration sensor 54 is connected to the control unit 7, measures the concentration of the processing liquid flowing through the concentration measurement flow channel 52 in accordance with an instruction from the control unit 7, and notifies the control unit 7 of the measured concentration. The cleaning fluid discharge unit 59 mainly discharges the cleaning fluid, but also discharges the processing liquid staying in the concentration measurement channel 52.

処理液排出部42は、液処理部38の処理槽34の底部に外部の排液管と連通する排液流路62を接続し、排液流路62に開閉弁63を設けている。開閉弁63は、制御部７に接続されており、制御部７で開閉制御される。   The treatment liquid discharge part 42 is connected to a drainage flow path 62 communicating with an external drainage pipe at the bottom of the treatment tank 34 of the liquid treatment part 38, and an open / close valve 63 is provided in the drainage flow path 62. The on-off valve 63 is connected to the control unit 7 and is controlled to be opened and closed by the control unit 7.

制御部７は、基板液処理装置１の各部（キャリア搬入出部２、ロット形成部３、ロット載置部４、ロット搬送部５、ロット処理部６など）の動作を制御する。制御部７には、大気圧力を計測するための大気圧センサ64（大気圧計測部）が接続されいる。大気圧センサ64は、制御部７からの指示で基板液処理装置１の設置場所での大気圧力を計測して制御部７に通知する。   The control unit 7 controls the operation of each unit of the substrate liquid processing apparatus 1 (such as the carrier carry-in / out unit 2, the lot forming unit 3, the lot placing unit 4, the lot transport unit 5, and the lot processing unit 6). Connected to the control unit 7 is an atmospheric pressure sensor 64 (atmospheric pressure measurement unit) for measuring atmospheric pressure. The atmospheric pressure sensor 64 measures the atmospheric pressure at the place where the substrate liquid processing apparatus 1 is installed according to an instruction from the control unit 7 and notifies the control unit 7 of it.

この制御部７は、たとえばコンピュータであり、コンピュータで読み取り可能な記憶媒体65を備える。記憶媒体65には、基板液処理装置１において実行される各種の処理を制御するプログラムが格納される。制御部７は、記憶媒体65に記憶されたプログラムを読み出して実行することによって基板液処理装置１の動作を制御する。なお、プログラムは、コンピュータによって読み取り可能な記憶媒体65に記憶されていたものであって、他の記憶媒体から制御部７の記憶媒体65にインストールされたものであってもよい。コンピュータによって読み取り可能な記憶媒体65としては、たとえばハードディスク（ＨＤ）、フレキシブルディスク（ＦＤ）、コンパクトディスク（ＣＤ）、マグネットオプティカルディスク（ＭＯ）、メモリカードなどがある。   The control unit 7 is a computer, for example, and includes a computer-readable storage medium 65. The storage medium 65 stores a program for controlling various processes executed in the substrate liquid processing apparatus 1. The control unit 7 controls the operation of the substrate liquid processing apparatus 1 by reading and executing a program stored in the storage medium 65. Note that the program may be stored in a storage medium 65 that can be read by a computer, and may be installed in the storage medium 65 of the control unit 7 from another storage medium. Examples of the computer-readable storage medium 65 include a hard disk (HD), a flexible disk (FD), a compact disk (CD), a magnetic optical disk (MO), and a memory card.

基板液処理装置１は、以上に説明したように構成しており、記憶媒体65に記憶された基板液処理プログラム等に従って制御部７で各部（キャリア搬入出部２、ロット形成部３、ロット載置部４、ロット搬送部５、ロット処理部６など）の動作を制御することで、基板８を処理する。   The substrate liquid processing apparatus 1 is configured as described above, and in accordance with the substrate liquid processing program stored in the storage medium 65 and the like, the control unit 7 controls each unit (carrier loading / unloading unit 2, lot forming unit 3, lot loading). The substrate 8 is processed by controlling the operation of the placement unit 4, the lot transfer unit 5, the lot processing unit 6, and the like.

この基板液処理装置１で基板８をエッチング処理する場合には、エッチング処理装置26の処理液供給部39によって所定濃度（85重量％）及び所定温度（25℃）のリン酸水溶液を液処理部38に供給し、処理液循環部41によって所定濃度（88.3重量％）及び所定温度（165℃）になるように加熱して処理液を生成し、処理液を液処理部38に貯留する。その際に、加熱によって水分が蒸発して処理液の濃度が増加するため、加熱によって蒸発する水分の量に相応する量の純水を希釈液供給部40によって液処理部38に供給して、処理液を希釈液で希釈する。そして、所定濃度（88.3重量％）及び所定温度（165℃）の処理液が貯留された処理槽34に基板昇降機構36によって基板８を浸漬させることで、処理液で基板８をエッチング処理（液処理）する。   In the case where the substrate 8 is etched by the substrate processing apparatus 1, a phosphoric acid aqueous solution having a predetermined concentration (85 wt%) and a predetermined temperature (25 ° C.) is processed by the processing liquid supply unit 39 of the etching processing apparatus 26. 38, heated to a predetermined concentration (88.3% by weight) and a predetermined temperature (165 ° C.) by the processing liquid circulation section 41 to generate a processing liquid, and the processing liquid is stored in the liquid processing section 38. At that time, since the moisture is evaporated by heating and the concentration of the processing liquid is increased, pure water in an amount corresponding to the amount of water evaporated by heating is supplied to the liquid processing unit 38 by the dilution liquid supply unit 40, Dilute the treatment solution with diluent. Then, the substrate 8 is immersed in the processing tank 34 in which the processing liquid having a predetermined concentration (88.3% by weight) and a predetermined temperature (165 ° C.) is stored by the substrate lifting mechanism 36, thereby etching the substrate 8 with the processing liquid (liquid Process).

この液処理中において、基板液処理装置１は、図３に示す基板液処理プログラムにしたがって処理液供給部39及び希釈液供給部40を制御部７で制御することで、処理液を所定濃度（88.3重量％）及び所定温度（165℃）に維持する。   During this liquid processing, the substrate liquid processing apparatus 1 controls the processing liquid supply unit 39 and the diluting liquid supply unit 40 with the control unit 7 in accordance with the substrate liquid processing program shown in FIG. 88.3 wt%) and at the prescribed temperature (165 ° C).

まず、制御部７は、図４に示すように、ポンプ49を駆動させて処理液を循環流路48で循環させるとともに、ヒータ51を駆動させて処理液の温度を所定温度（165℃）に維持させて、基板８の液処理を開始する（液処理開始ステップS1）。   First, as shown in FIG. 4, the control unit 7 drives the pump 49 to circulate the processing liquid in the circulation channel 48 and drives the heater 51 to set the temperature of the processing liquid to a predetermined temperature (165 ° C.). Then, the liquid processing of the substrate 8 is started (liquid processing start step S1).

液処理開始後の所定のタイミングで制御部７は、処理液の濃度を濃度センサ54で計測する（濃度計測ステップS2）。この濃度計測ステップS2では、図５に示すように、液処理時と同様にポンプ49を駆動させて処理液を循環流路48で循環させるとともに、ヒータ51を駆動させて処理液の温度を所定温度（165℃）に維持させる。さらに、上流側開閉弁53と下流側開閉弁55とを開放した状態にして、循環流路48を流れる処理液の一部を濃度計測流路52に流し、濃度センサ54で処理液の濃度を計測する。なお、濃度計測後には、上流側開閉弁53と下流側開閉弁55とを閉塞した状態に戻して、全ての処理液を循環流路48で循環させる。   At a predetermined timing after the start of the liquid treatment, the control unit 7 measures the concentration of the treatment liquid with the concentration sensor 54 (concentration measurement step S2). In this concentration measurement step S2, as shown in FIG. 5, the pump 49 is driven to circulate the processing liquid through the circulation channel 48 and the heater 51 is driven to set the temperature of the processing liquid to a predetermined value as in the liquid processing. Maintain temperature (165 ° C). Further, with the upstream side open / close valve 53 and the downstream side open / close valve 55 open, a part of the processing liquid flowing through the circulation flow path 48 is caused to flow into the concentration measurement flow path 52, and the concentration of the processing liquid is measured by the concentration sensor 54. measure. After the concentration measurement, the upstream side open / close valve 53 and the downstream side open / close valve 55 are returned to the closed state, and all the processing liquid is circulated through the circulation flow path 48.

次に、制御部７は、濃度センサ54で処理液の濃度を正常に計測できたか否かを判断する（濃度センサ正常判断ステップS3）。この濃度センサ正常判断ステップS3において、制御部７は、濃度計測ステップS2において濃度センサ54から異常を示す信号を受けた場合や、濃度計測ステップS2において濃度センサ54で計測された濃度が所定範囲外の場合や、濃度計測ステップS2において濃度センサ54から何ら信号を受け取れなかった場合に、濃度センサ54で処理液の濃度を正常に計測できないと判断する。   Next, the control unit 7 determines whether or not the concentration of the processing liquid has been normally measured by the concentration sensor 54 (concentration sensor normal determination step S3). In this density sensor normal determination step S3, the control unit 7 receives a signal indicating abnormality from the density sensor 54 in the density measurement step S2, or the density measured by the density sensor 54 in the density measurement step S2 is out of the predetermined range. In this case, or when no signal is received from the concentration sensor 54 in the concentration measurement step S2, it is determined that the concentration of the processing liquid cannot be measured normally by the concentration sensor 54.

この濃度センサ正常判断ステップＳ３において、濃度センサ54で処理液の濃度を正常に計測できると判断した場合には、以下に説明する通常処理を行い、一方、濃度センサ54で処理液の濃度を正常に計測できないと判断した場合には、後述する異常処理を行う。   In this concentration sensor normal determination step S3, when it is determined that the concentration of the processing liquid can be normally measured by the concentration sensor 54, the normal processing described below is performed, while the concentration of the processing liquid is normal by the concentration sensor 54. If it is determined that the measurement cannot be performed, an abnormality process described later is performed.

濃度センサ正常判断ステップS3で濃度センサ54で処理液の濃度を正常に計測できると判断した場合、制御部７は、濃度計測ステップS2において濃度センサ54で計測した処理液の濃度に基づいて処理液の濃度を調整するか否かを判断する（処理液調整判断ステップS4）。この処理液調整判断ステップS4において、処理液の濃度が所定範囲内の場合には、処理液の調整が不要と判断して後述する液処理終了判断ステップS9に進み、一方、処理液の濃度が所定範囲外の場合には、処理液の調整が必要と判断する。   When it is determined in the concentration sensor normal determination step S3 that the concentration of the treatment liquid can be normally measured by the concentration sensor 54, the control unit 7 performs processing liquid based on the concentration of the treatment liquid measured by the concentration sensor 54 in the concentration measurement step S2. It is determined whether or not to adjust the concentration of the liquid (processing liquid adjustment determination step S4). In this processing liquid adjustment determination step S4, if the concentration of the processing liquid is within the predetermined range, it is determined that the adjustment of the processing liquid is unnecessary, and the process proceeds to a liquid processing end determination step S9 described later. If it is outside the predetermined range, it is determined that adjustment of the treatment liquid is necessary.

処理液調整判断ステップS4で処理液の調整が必要と判断した場合、制御部７は、大気圧センサ64で大気圧を計測し（大気圧計測ステップS5）、計測した大気圧が予め設定した所定範囲（第１所定範囲：たとえば、1013±10hPa）内か否かを判断する（大気圧判断ステップS6）。   When it is determined that the adjustment of the processing liquid is necessary in the processing liquid adjustment determination step S4, the control unit 7 measures the atmospheric pressure with the atmospheric pressure sensor 64 (atmospheric pressure measurement step S5), and the measured atmospheric pressure is set to a predetermined value. It is determined whether it is within a range (first predetermined range: 1013 ± 10 hPa, for example) (atmospheric pressure determination step S6).

大気圧判断ステップS6で大気圧が第１所定範囲内であると判断した場合、制御部７は、濃度計測ステップS2において濃度センサ54で計測した処理液の濃度に基づいて処理液及び希釈液の供給量を決定する。一方、大気圧判断ステップS6で大気圧が第１所定範囲外であると判断した場合、制御部７は、濃度計測ステップS2において濃度センサ54で計測した処理液の濃度に基づいて処理液及び希釈液の供給量を決定した後に、大気圧計測ステップS5で計測した大気圧に基づいて処理液及び希釈液の供給量を補正する（供給量補正ステップS7）。この供給量補正ステップS7では、大気圧から処理液の飽和濃度を求め、処理液がその飽和濃度となるように処理液及び希釈液の供給量を補正する。これにより、大気圧に変動が生じても処理液の濃度を適正に保つことができ、基板８を良好に処理することができる。   When it is determined in the atmospheric pressure determination step S6 that the atmospheric pressure is within the first predetermined range, the control unit 7 determines whether the processing liquid and the dilution liquid are based on the concentration of the processing liquid measured by the concentration sensor 54 in the concentration measurement step S2. Determine the supply. On the other hand, when it is determined in the atmospheric pressure determination step S6 that the atmospheric pressure is outside the first predetermined range, the control unit 7 performs processing liquid and dilution based on the concentration of the processing liquid measured by the concentration sensor 54 in the concentration measurement step S2. After determining the supply amount of the liquid, the supply amounts of the treatment liquid and the dilution liquid are corrected based on the atmospheric pressure measured in the atmospheric pressure measurement step S5 (supply amount correction step S7). In this supply amount correction step S7, the saturation concentration of the treatment liquid is obtained from the atmospheric pressure, and the supply amounts of the treatment liquid and the dilution liquid are corrected so that the treatment liquid has the saturation concentration. Thereby, even if fluctuation | variation arises in atmospheric pressure, the density | concentration of a process liquid can be kept appropriate and the board | substrate 8 can be processed favorably.

その後、制御部７は、図６に示すように、処理液供給部39及び希釈液供給部40から液処理部38に処理液及び希釈液を供給する（供給ステップS8）。なお、供給ステップS8では、前述した処理液の濃度に基づいて決定した処理液及び希釈液の供給量又は大気圧に基づいて補正した処理液及び希釈液の供給量で処理液及び希釈液を供給する。そのため、処理液供給部39と希釈液供給部40から処理液と希釈液とを両方とも供給する場合に限られず、処理液供給部39から処理液だけを供給する場合（希釈液の供給量が０の場合）もあり、また、希釈液供給部40から希釈液だけを供給する場合（処理液の供給量が０の場合）もある。   Thereafter, as shown in FIG. 6, the control unit 7 supplies the processing liquid and the dilution liquid from the processing liquid supply part 39 and the dilution liquid supply part 40 to the liquid processing part 38 (supplying step S8). In the supply step S8, the treatment liquid and the dilution liquid are supplied at the treatment liquid and the dilution liquid supply amount determined based on the treatment liquid concentration described above or the treatment liquid and the dilution liquid supply amount corrected based on the atmospheric pressure. To do. Therefore, the present invention is not limited to the case where both the processing liquid and the dilution liquid are supplied from the processing liquid supply unit 39 and the dilution liquid supply unit 40, and the case where only the processing liquid is supplied from the processing liquid supply unit 39 (the supply amount of the dilution liquid is In some cases, only the diluent is supplied from the diluent supply unit 40 (when the supply amount of the processing liquid is zero).

その後、制御部７は、基板８の液処理を終了するか否か判断する（液処理終了判断ステップS9）。この液処理終了判断ステップS9では、制御部７は、内蔵するタイマで基板８を処理液に浸漬させた時間を計測し、所定時間以上経過している場合には基板８の液処理を終了すると判断し、一方、所定時間以上経過していない場合には前述した濃度計測ステップS2に戻る。通常処理においては、基板８の液処理が終了するまで供給ステップS8が繰り返し実行され、処理液及び希釈液が繰り返し供給される。その都度、処理液及び希釈液は、処理液の濃度や大気圧に応じた供給量で供給される。そのため、処理液及び希釈液の供給量は、時間とともに変動する（なお、処理液の濃度や大気圧の変動が少ない場合に処理液及び希釈液の供給量が時間にかかわらず一定となることも有り得る）。   Thereafter, the control unit 7 determines whether or not to end the liquid processing of the substrate 8 (liquid processing end determination step S9). In this liquid processing end determination step S9, the control unit 7 measures the time during which the substrate 8 is immersed in the processing liquid with a built-in timer, and ends the liquid processing of the substrate 8 when a predetermined time has elapsed. On the other hand, if the predetermined time or more has not elapsed, the process returns to the above-described concentration measurement step S2. In the normal processing, the supply step S8 is repeatedly executed until the liquid processing of the substrate 8 is completed, and the processing liquid and the dilution liquid are repeatedly supplied. In each case, the treatment liquid and the dilution liquid are supplied in a supply amount corresponding to the concentration of the treatment liquid and the atmospheric pressure. For this reason, the supply amounts of the treatment liquid and the dilution liquid vary with time (Note that when the concentration of the treatment liquid and the atmospheric pressure are small, the supply amounts of the treatment liquid and the dilution liquid may be constant regardless of the time. Possible).

一方、前述した濃度センサ正常判断ステップＳ３において、濃度センサ54で処理液の濃度を正常に計測できないと判断した場合には、以下に説明する異常処理を行う。   On the other hand, in the above-described concentration sensor normal determination step S3, when it is determined that the concentration sensor 54 cannot normally measure the concentration of the processing liquid, the abnormality processing described below is performed.

濃度センサ正常判断ステップS3で濃度センサ54で処理液の濃度を正常に計測できないと判断した場合、制御部７は、大気圧センサ64で大気圧を計測し（大気圧計測ステップS10）、計測した大気圧が予め設定した所定範囲（第２所定範囲：第１所定範囲よりも狭い範囲。たとえば、1013±5hPa）内か否かを判断する（大気圧判断ステップS11）。   If it is determined in the concentration sensor normal determination step S3 that the concentration of the processing liquid cannot be normally measured by the concentration sensor 54, the control unit 7 measures the atmospheric pressure by the atmospheric pressure sensor 64 (atmospheric pressure measurement step S10) and measures it. It is determined whether or not the atmospheric pressure is within a predetermined range (second predetermined range: a range narrower than the first predetermined range. For example, 1013 ± 5 hPa) (atmospheric pressure determination step S11).

大気圧判断ステップS11で大気圧が第２所定範囲内であると判断した場合、図６に示すように、処理液供給部39及び希釈液供給部40から液処理部38に処理液及び希釈液を供給する（供給状態維持ステップS12）。この供給状態維持ステップS12では、処理液及び希釈液の供給状態を予め決められた供給状態で維持する。処理液及び希釈液の供給状態を予め決められた供給状態で維持するとは、予備的な実験等によって求められた一定の又は時間的に変動する供給量で処理液及び希釈液を供給する状態を維持するものでもよく、また、前述した正常処理において供給ステップS8で実行した処理液及び希釈液の供給状態（基板８の処理中における処理液及び希釈液の供給状態）を維持するものでもよい。   When it is determined in the atmospheric pressure determination step S11 that the atmospheric pressure is within the second predetermined range, as shown in FIG. 6, the processing liquid and the dilution liquid are supplied from the processing liquid supply unit 39 and the dilution liquid supply unit 40 to the liquid processing unit 38. (Supply state maintaining step S12). In this supply state maintaining step S12, the supply state of the processing liquid and the diluent is maintained in a predetermined supply state. Maintaining the supply state of the treatment liquid and the dilution liquid in a predetermined supply state means a state in which the treatment liquid and the dilution liquid are supplied at a constant or time-varying supply amount obtained by a preliminary experiment or the like. Alternatively, the supply state of the processing liquid and the dilution liquid (the supply state of the processing liquid and the dilution liquid during the processing of the substrate 8) executed in the supply step S8 in the above-described normal processing may be maintained.

ここで、正常処理時の処理液及び希釈液の供給量（供給ステップS8で繰り返し供給する処理液及び希釈液の供給量）が時間とともに変動するため、供給状態維持ステップS12で維持する処理液及び希釈液の供給状態としては、主に以下の状態が考えられる。
（１）濃度センサ正常判断ステップS3の実行時点（濃度計測部（濃度センサ54）で処理液の濃度を正常に計測できないと判断した時点）より前の供給ステップS8で実行した処理液及び希釈液と同じ供給量で処理液及び希釈液を供給する状態。
（２）濃度センサ正常判断ステップS3の実行時点（濃度計測部（濃度センサ54）で処理液の濃度を正常に計測できないと判断した時点）より前の所定期間（たとえば、10秒間）で供給ステップS8で実行した処理液及び希釈液の供給量を平均した量で処理液及び希釈液を供給する状態。
（３）濃度センサ正常判断ステップS3の実行時点（濃度計測部（濃度センサ54）で処理液の濃度を正常に計測できないと判断した時点）より前の所定期間（たとえば、20秒間）で供給ステップS8で実行した時間とともに変動する処理液及び希釈液の供給量で処理液及び希釈液を変動させて供給する状態。 Here, since the supply amount of the treatment liquid and the dilution liquid during normal processing (the supply amount of the treatment liquid and the dilution liquid repeatedly supplied in the supply step S8) varies with time, the treatment liquid maintained in the supply state maintenance step S12 and As the supply state of the diluent, the following states are mainly conceivable.
(1) Treatment liquid and dilution liquid executed in the supply step S8 before the execution time of the concentration sensor normality determination step S3 (time point when the concentration measurement unit (concentration sensor 54) determines that the concentration of the treatment liquid cannot be measured normally) A state in which the processing liquid and the dilution liquid are supplied in the same supply amount as in FIG.
(2) Supply step in a predetermined period (for example, 10 seconds) before the execution time of the concentration sensor normality determination step S3 (the time point when the concentration measurement unit (concentration sensor 54) determines that the concentration of the treatment liquid cannot be measured normally) A state in which the processing liquid and the dilution liquid are supplied in an average amount of the processing liquid and the dilution liquid supplied in S8.
(3) Supply step in a predetermined period (for example, 20 seconds) before the execution time of the concentration sensor normality determination step S3 (the time point when the concentration measurement unit (concentration sensor 54) determines that the concentration of the treatment liquid cannot be measured normally) A state in which the processing liquid and the dilution liquid are changed and supplied in accordance with the supply amount of the processing liquid and the dilution liquid that varies with the time executed in S8.

供給状態維持ステップS12では、制御部７は、上記（１）〜（３）のいずれかの供給状態を予め決めておき、その供給状態を維持するように処理液供給部39及び希釈液供給部40から液処理部38に処理液及び希釈液を供給する。なお、供給状態維持ステップS12では、正常処理時の供給ステップS8で実行した処理液及び希釈液の供給状態を維持するため、供給ステップS8と同様に、処理液供給部39と希釈液供給部40から処理液と希釈液とを両方とも供給する場合に限られず、処理液供給部39から処理液だけを供給する場合（希釈液の供給量が０の場合）もあり、また、希釈液供給部40から希釈液だけを供給する場合（処理液の供給量が０の場合）もある。   In the supply state maintaining step S12, the control unit 7 determines the supply state in any one of the above (1) to (3) in advance, and the processing liquid supply unit 39 and the dilution liquid supply unit so as to maintain the supply state. The treatment liquid and the dilution liquid are supplied from 40 to the liquid treatment unit 38. In the supply state maintaining step S12, in order to maintain the supply state of the processing liquid and dilution liquid executed in the supply step S8 during normal processing, the processing liquid supply unit 39 and the dilution liquid supply unit 40 are maintained in the same manner as in the supply step S8. However, the present invention is not limited to the case where both the processing liquid and the dilution liquid are supplied from, and there is a case where only the processing liquid is supplied from the processing liquid supply unit 39 (when the supply amount of the dilution liquid is 0). In some cases, only the diluting solution is supplied from 40 (when the supply amount of the processing solution is 0).

このように、異常処理時において正常処理時の処理液及び希釈液の供給状態を維持することで、濃度センサ54で処理液の濃度を正常に計測できない場合でも基板８の液処理を継続して行うことができる。これにより、より多くの基板８を良好に液処理することができる。   In this way, by maintaining the supply state of the processing liquid and dilution liquid during normal processing during abnormal processing, liquid processing of the substrate 8 is continued even when the concentration sensor 54 cannot normally measure the concentration of the processing liquid. It can be carried out. Thereby, more substrates 8 can be liquid-treated satisfactorily.

その後、制御部７は、基板８の液処理を終了するか否か判断する（液処理終了判断ステップS13）。この液処理終了判断ステップS13では、制御部７は、内蔵するタイマで基板８を処理液に浸漬させた時間を計測し、所定時間以上経過している場合には基板８の液処理を終了すると判断し、一方、所定時間以上経過していない場合には前述した供給状態維持ステップS12に戻る。異常処理においては、基板８の液処理が終了するまで供給状態維持ステップS12における処理液及び希釈液の供給状態を維持し続ける。   Thereafter, the control unit 7 determines whether or not to end the liquid processing of the substrate 8 (liquid processing end determination step S13). In this liquid processing end determination step S13, the control unit 7 measures the time during which the substrate 8 is immersed in the processing liquid with a built-in timer, and ends the liquid processing of the substrate 8 when a predetermined time has elapsed. On the other hand, if the predetermined time has not elapsed, the process returns to the supply state maintaining step S12 described above. In the abnormal processing, the supply state of the processing liquid and the dilution liquid in the supply state maintaining step S12 is continuously maintained until the liquid processing of the substrate 8 is completed.

一方、大気圧判断ステップS11で大気圧が第２所定範囲外であると判断した場合、制御部７は、液処理部38での基板８の液処理を強制的に中断し（処理中断ステップS14）、液処理を終了する。このように、制御部７は、異常処理時に大気圧が第２所定範囲外の場合、前述した供給状態維持ステップS12を実行して基板８の液処理を継続して行っても基板８を良好に処理できない（処理不良が発生する）と判断し、基板８の液処理を終了する。これにより、基板８を無駄に液処理する時間を省略することができる。特に、正常処理時における大気圧の第１所定範囲よりも異常処理時における大気圧の第２所定範囲を狭くすることで、より厳しい条件で異常処理（供給状態維持）を続行することができ、より一層基板８を無駄に液処理する時間を省略することができる。   On the other hand, when determining that the atmospheric pressure is outside the second predetermined range in the atmospheric pressure determination step S11, the control unit 7 forcibly interrupts the liquid processing of the substrate 8 in the liquid processing unit 38 (processing interruption step S14). ), The liquid treatment is terminated. As described above, when the atmospheric pressure is outside the second predetermined range at the time of abnormal processing, the control unit 7 performs the supply state maintaining step S12 described above to continue the liquid processing of the substrate 8 and keep the substrate 8 good. Therefore, the liquid processing of the substrate 8 is finished. As a result, the time for wasteful liquid processing of the substrate 8 can be omitted. In particular, by narrowing the second predetermined range of atmospheric pressure at the time of abnormal processing to be narrower than the first predetermined range of atmospheric pressure at the time of normal processing, abnormal processing (maintenance of supply state) can be continued under more severe conditions. Further, it is possible to omit time for wastefully liquid-treating the substrate 8.

なお、基板液処理装置１は、異常処理時にオペレータに報知して、オペレータが異常処理された基板８の処理状態を確認できるようにしている。   The substrate liquid processing apparatus 1 notifies the operator at the time of abnormal processing so that the operator can check the processing state of the substrate 8 that has been abnormally processed.

以上に説明したように、基板液処理装置１では、液処理部38で基板８の処理中に希釈液で希釈された処理液の濃度を濃度計測部（濃度センサ54）で正常に計測できないと判断した場合、予め決められた処理液及び希釈液の供給状態を維持するように処理液供給部39及び希釈液供給部40を制御する。   As described above, in the substrate liquid processing apparatus 1, the concentration of the processing liquid diluted with the diluent during the processing of the substrate 8 by the liquid processing unit 38 cannot be normally measured by the concentration measuring unit (concentration sensor 54). When the determination is made, the processing liquid supply unit 39 and the dilution liquid supply unit 40 are controlled so as to maintain a predetermined supply state of the processing liquid and the dilution liquid.

そのため、基板液処理装置１では、濃度計測部（濃度センサ54）の故障や配線の切断や濃度センサ54の接液部分の汚れなどの故障や異常などによって処理液の濃度を正常に計測できない場合でも基板８の液処理を継続して行うことができる。従来のように処理中の基板８を全て廃棄してしまう場合に比べて、より多くの基板８を良好に液処理することができるので、基板液処理装置１の歩留まりを向上させることができる。また、予備の濃度計測部を設ける必要がないために、基板液処理装置１のコストアップを招くこともない。   Therefore, in the substrate liquid processing apparatus 1, the concentration of the processing liquid cannot be normally measured due to a failure or abnormality such as a failure of the concentration measuring unit (concentration sensor 54), cutting of the wiring, or contamination of the liquid contact portion of the concentration sensor 54. However, the liquid treatment of the substrate 8 can be continued. Since a larger number of substrates 8 can be subjected to liquid processing better than in the case where all of the substrates 8 being processed are discarded as in the prior art, the yield of the substrate liquid processing apparatus 1 can be improved. Further, since it is not necessary to provide a spare concentration measuring unit, the cost of the substrate liquid processing apparatus 1 is not increased.

１ 基板液処理装置
７ 制御部
８ 基板
38 液処理部
39 処理液供給部
40 希釈液供給部
54 濃度センサ（濃度計測部）
64 大気圧センサ（大気圧計測部） 1 Substrate liquid processing device 7 Control unit 8 Substrate
38 Liquid processing section
39 Treatment liquid supply unit
40 Diluent supply section
54 Concentration sensor (concentration measurement unit)
64 Atmospheric pressure sensor (atmospheric pressure measuring unit)

Claims (11)

基板を希釈液で希釈された処理液で処理する液処理部と、
前記処理液を供給する処理液供給部と、
前記処理液を希釈するための希釈液を供給する希釈液供給部と、
前記希釈液で希釈された処理液の濃度を計測する濃度計測部と、
前記濃度計測部で計測した前記希釈液で希釈された処理液の濃度に応じて前記処理液供給部及び希釈液供給部を制御する制御部と、
を有し、
前記制御部は、前記液処理部で前記基板の処理中に前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した場合、前記処理液及び希釈液の供給状態を予め決められた供給状態で維持するように前記処理液供給部及び希釈液供給部を制御し、前記液処理部での前記基板の処理を継続することを特徴とする基板液処理装置。 A liquid processing section for processing a substrate with a processing liquid diluted with a diluent;
A treatment liquid supply unit for supplying the treatment liquid;
A diluent supply unit for supplying a diluent for diluting the treatment liquid;
A concentration measuring unit for measuring the concentration of the treatment liquid diluted with the diluent,
A control unit that controls the treatment liquid supply unit and the dilution liquid supply unit according to the concentration of the treatment liquid diluted with the diluent measured by the concentration measurement unit;
Have
When the control unit determines that the concentration of the processing liquid cannot be normally measured by the concentration measurement unit during the processing of the substrate by the liquid processing unit, the supply state of the processing liquid and the dilution liquid is determined in advance. A substrate liquid processing apparatus, wherein the processing liquid supply unit and the dilution liquid supply unit are controlled so as to be maintained in a supply state, and the processing of the substrate in the liquid processing unit is continued. 前記予め決められた供給状態は、
（１）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の前記処理液及び希釈液と同じ供給量で前記処理液及び希釈液を供給する状態、
（２）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の所定期間での平均した前記処理液及び希釈液の供給量で前記処理液及び希釈液を供給する状態、
（３）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の所定期間で変動する前記処理液及び希釈液の供給量で前記処理液及び希釈液を変動させて供給する状態、
のいずれかであることを特徴とする請求項１に記載の基板液処理装置。 The predetermined supply state is:
(1) A state in which the treatment liquid and the dilution liquid are supplied in the same supply amount as the treatment liquid and the dilution liquid before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally,
(2) Supplying the treatment liquid and the dilution liquid with the supply amount of the treatment liquid and the dilution liquid averaged over a predetermined period before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally. State,
(3) The treatment liquid and the dilution liquid are changed by the supply amount of the treatment liquid and the dilution liquid that fluctuates in a predetermined period before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally. Supply condition,
The substrate liquid processing apparatus according to claim 1, wherein the substrate liquid processing apparatus is any one of the following. 大気圧を計測する大気圧計測部をさらに有し、
前記制御部は、前記大気圧計測部で計測した大気圧が所定範囲内の場合、前記基板の処理中における前記処理液及び希釈液の供給状態を維持し、前記大気圧計測部で計測した大気圧が所定範囲外の場合、前記液処理部での前記基板の処理を中断するように制御することを特徴とする請求項１又は請求項２に記載の基板液処理装置。 It further has an atmospheric pressure measurement unit that measures atmospheric pressure,
When the atmospheric pressure measured by the atmospheric pressure measurement unit is within a predetermined range, the control unit maintains the supply state of the processing liquid and the dilution liquid during the processing of the substrate, and the atmospheric pressure measured by the atmospheric pressure measurement unit. 3. The substrate liquid processing apparatus according to claim 1, wherein when the atmospheric pressure is out of a predetermined range, control is performed so as to interrupt processing of the substrate in the liquid processing unit. 前記制御部は、
前記濃度計測部で前記希釈液で希釈された処理液の濃度を正常に計測できる場合、前記大気圧計測部で計測した大気圧が第１所定範囲内のときと第１所定範囲外のときとで異なる処理を行い、
前記濃度計測部で前記処理液の濃度を正常に計測できない場合、前記大気圧計測部で計測した大気圧が第２所定範囲内のときに前記基板の処理中における前記処理液及び希釈液の供給状態を維持し、前記大気圧計測部で計測した大気圧が第２所定範囲外のときに、前記液処理部での前記基板の処理を中断し、
前記第１所定範囲よりも第２所定範囲を狭い範囲としたことを特徴とする請求項３に記載の基板液処理装置。 The controller is
When the concentration measuring unit can normally measure the concentration of the treatment liquid diluted with the diluent, when the atmospheric pressure measured by the atmospheric pressure measuring unit is within the first predetermined range and outside the first predetermined range Do different processing with
When the concentration measuring unit cannot normally measure the concentration of the processing liquid, the supply of the processing liquid and the dilution liquid during the processing of the substrate when the atmospheric pressure measured by the atmospheric pressure measuring unit is within the second predetermined range. Maintaining the state, and when the atmospheric pressure measured by the atmospheric pressure measurement unit is outside the second predetermined range, the processing of the substrate in the liquid processing unit is interrupted,
4. The substrate liquid processing apparatus according to claim 3, wherein the second predetermined range is narrower than the first predetermined range. 前記希釈液は、前記処理液の加熱によって蒸発する水分を補充する純水であることを特徴とする請求項１〜請求項４のいずれかに記載の基板液処理装置。   The substrate liquid processing apparatus according to claim 1, wherein the dilution liquid is pure water that replenishes water evaporated by heating the processing liquid. 液処理部で希釈液で希釈された処理液を用いて基板を処理し、前記基板の処理中に前記希釈液で希釈された処理液の濃度を正常に計測できなくなった場合に、前記処理液及び希釈液の供給状態を予め決められた供給状態で維持し、前記液処理部での前記基板の処理を継続することを特徴とする基板液処理方法。   When the substrate is processed using the processing liquid diluted with the diluent in the liquid processing section, and the concentration of the processing liquid diluted with the diluent cannot be normally measured during the processing of the substrate, the processing liquid And a diluting liquid supply state maintained in a predetermined supply state, and processing of the substrate in the liquid processing unit is continued. 前記予め決められた供給状態は、
（１）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の前記処理液及び希釈液と同じ供給量で前記処理液及び希釈液を供給する状態、
（２）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の所定期間での平均した前記処理液及び希釈液の供給量で前記処理液及び希釈液を供給する状態、
（３）前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した時点より前の所定期間で変動する前記処理液及び希釈液の供給量で前記処理液及び希釈液を変動させて供給する状態、
のいずれかであることを特徴とする請求項６に記載の基板液処理方法。 The predetermined supply state is:
(1) A state in which the treatment liquid and the dilution liquid are supplied in the same supply amount as the treatment liquid and the dilution liquid before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally,
(2) Supplying the treatment liquid and the dilution liquid with the supply amount of the treatment liquid and the dilution liquid averaged over a predetermined period before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally. State,
(3) The treatment liquid and the dilution liquid are changed by the supply amount of the treatment liquid and the dilution liquid that fluctuates in a predetermined period before the time point when the concentration measurement unit determines that the concentration of the treatment liquid cannot be measured normally. Supply condition,
The substrate liquid processing method according to claim 6, wherein the substrate liquid processing method is any one of the above. 大気圧を計測し、大気圧が所定範囲内の場合、前記基板の処理中における前記処理液及び希釈液の供給状態を維持し、大気圧が所定範囲外の場合、前記液処理部での前記基板の処理を中断することを特徴とする請求項６又は請求項７に記載の基板液処理方法。   When the atmospheric pressure is measured and the atmospheric pressure is within a predetermined range, the supply state of the processing liquid and the dilution liquid during the processing of the substrate is maintained, and when the atmospheric pressure is out of the predetermined range, the liquid processing unit 8. The substrate liquid processing method according to claim 6, wherein the substrate processing is interrupted. 前記希釈液で希釈された処理液の濃度を正常に計測できる場合、大気圧が第１所定範囲内のときと第１所定範囲外のときとで異なる処理を行い、
前記希釈液で希釈された処理液の濃度を正常に計測できない場合、大気圧が第２所定範囲内のときに前記基板の処理中における前記処理液及び希釈液の供給状態を維持し、大気圧が第２所定範囲外のときに、前記液処理部での前記基板の処理を中断し、
前記第１所定範囲よりも第２所定範囲を狭い範囲としたことを特徴とする請求項８に記載の基板液処理方法。 When the concentration of the treatment liquid diluted with the dilution liquid can be normally measured, different processing is performed when the atmospheric pressure is within the first predetermined range and outside the first predetermined range,
When the concentration of the treatment liquid diluted with the dilution liquid cannot be measured normally, the supply state of the treatment liquid and the dilution liquid during the processing of the substrate is maintained when the atmospheric pressure is within the second predetermined range. Is outside the second predetermined range, the processing of the substrate in the liquid processing unit is interrupted,
The substrate liquid processing method according to claim 8, wherein the second predetermined range is narrower than the first predetermined range. 前記希釈液は、前記希釈液で希釈された処理液の加熱によって蒸発する水分を補充する純水であることを特徴とする請求項６〜請求項９のいずれかに記載の基板液処理方法。   The substrate liquid processing method according to claim 6, wherein the dilution liquid is pure water that replenishes moisture evaporated by heating the processing liquid diluted with the dilution liquid. 基板を希釈液で希釈された処理液で処理する液処理部と、
前記処理液を供給する処理液供給部と、
前記処理液を希釈するための希釈液を供給する希釈液供給部と、
前記希釈液で希釈された処理液の濃度を計測する濃度計測部と、
を有する基板液処理装置を用いて基板液処理方法を実行させる基板液処理プログラムを記憶したコンピュータ読み取り可能な記憶媒体において、
前記液処理部で前記基板の処理中に前記濃度計測部で前記処理液の濃度を正常に計測できないと判断した場合、前記処理液及び希釈液の供給状態を予め決められた供給状態で維持するように前記処理液供給部及び希釈液供給部を制御し、前記液処理部での前記基板の処理を継続することを特徴とする基板液処理プログラムを記憶したコンピュータ読み取り可能な記憶媒体。 A liquid processing section for processing a substrate with a processing liquid diluted with a diluent;
A treatment liquid supply unit for supplying the treatment liquid;
A diluent supply unit for supplying a diluent for diluting the treatment liquid;
A concentration measuring unit for measuring the concentration of the treatment liquid diluted with the diluent,
In a computer-readable storage medium storing a substrate liquid processing program for executing a substrate liquid processing method using a substrate liquid processing apparatus having
When it is determined that the concentration of the processing liquid cannot be normally measured by the concentration measurement unit during the processing of the substrate by the liquid processing unit, the supply state of the processing liquid and the dilution liquid is maintained in a predetermined supply state. A computer-readable storage medium storing a substrate liquid processing program, wherein the processing liquid supply unit and the dilution liquid supply unit are controlled as described above, and the processing of the substrate in the liquid processing unit is continued.
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