阅读说明：本技术 基板处理装置及基板的制造方法 (Substrate processing apparatus and method for manufacturing substrate ) 是由 滨田晃一 小林信雄 于 2017-02-24 设计创作，主要内容包括：基板处理装置及基板的制造方法。上述基板处理装置具备：基板支承部,支承基板；旋转部,使上述基板旋转；处理液供给部,向上述基板的表面供给处理液；以及控制部,上述控制部进行控制,使得在一个基板处理工序中、针对由上述旋转部旋转的上述基板持续地从上述处理液供给部连续地供给上述处理液、并一边将上述处理液从上述基板排出一边连续地进行基板处理的期间,以预先设定的规定的定时,定期地进行使上述处理液从上述基板排出的排液速度提高的排液处理,并且上述基板处理的最后以上述排液处理结束。(A substrate processing apparatus and a method of manufacturing a substrate. The substrate processing apparatus includes: a substrate support portion for supporting the substrate; a rotating unit configured to rotate the substrate; a processing liquid supply unit configured to supply a processing liquid to a surface of the substrate; and a control unit that performs control so that, during a period in which the processing liquid is continuously supplied from the processing liquid supply unit to the substrate rotated by the rotation unit and substrate processing is continuously performed while the processing liquid is discharged from the substrate in one substrate processing step, a drain process for increasing a drain rate of the processing liquid discharged from the substrate is periodically performed at a predetermined timing, and the drain process is ended at the end of the substrate processing.)

1. A substrate processing apparatus includes:

a substrate support portion for supporting the substrate;

a rotating unit configured to rotate the substrate;

a processing liquid supply unit configured to supply a processing liquid to a surface of the substrate;

and

a control part for controlling the operation of the display device,

the control unit controls the substrate processing unit to periodically perform a drain process for increasing a drain rate of the processing liquid to be drained from the substrate at a predetermined timing while continuously supplying the processing liquid from the processing liquid supply unit to the substrate rotated by the rotation unit and continuously performing the substrate processing while draining the processing liquid from the substrate in one substrate processing step, and to end the drain process at the end of the substrate processing.

2. The substrate processing apparatus according to claim 1,

the control unit includes a rotation speed adjustment unit that increases the rotation speed of the substrate at the predetermined timing set in advance as the liquid discharge process.

3. The substrate processing apparatus according to claim 1,

the control unit includes a liquid amount adjusting unit that increases the flow rate of the processing liquid supplied to the substrate at the predetermined timing set in advance as the liquid discharge processing.

4. The substrate processing apparatus according to claim 1,

the time per 1 time of the liquid discharge treatment is shorter than the time per 1 time of the normal treatment in the substrate treatment.

5. The substrate processing apparatus according to claim 1,

the liquid discharge treatment is performed a plurality of times in the substrate treatment.

6. The substrate processing apparatus according to claim 5,

in the above-mentioned liquid discharge treatment, the time for each 1 time is the same time.

7. The substrate processing apparatus according to claim 1,

the substrate treatment includes a normal treatment and the liquid discharge treatment;

when the processing scheduled time (A) of the substrate processing is divided by the time (T) of 1 set of the normal processing and the liquid discharge processing to generate a remainder, the time of the normal processing is adjusted without changing the time of the liquid discharge processing.

8. A method of manufacturing a substrate, comprising:

rotating the substrate;

supplying a treatment liquid to the surface of the substrate;

periodically performing a liquid discharge treatment in which a liquid discharge speed at which the processing liquid supplied to the substrate moves from the substrate is increased by one or more liquid discharge treatments of increasing a rotation speed of the rotation and increasing a supply amount of the processing liquid at a predetermined timing set in advance while the processing liquid is continuously supplied to the rotating substrate and the processing liquid is continuously processed while being discharged from the substrate in one substrate processing step,

the liquid discharge treatment is completed at the end of the substrate treatment.

Technical Field

The invention relates to a substrate processing apparatus, a substrate processing method and a substrate manufacturing method.

Background

In a manufacturing process of a semiconductor, a liquid crystal panel, or the like, a substrate processing apparatus is used which supplies a processing liquid to a surface of a substrate such as a wafer or a liquid crystal substrate to process the surface of the substrate (see, for example, japanese unexamined patent application, first publication No. 9-134872). For example, a resist stripping solution, a cleaning solution, or the like is supplied as a processing liquid to perform an etching process or a cleaning process. As such substrate processing, there is known spin-type substrate processing in which a substrate is rotated, a processing liquid is supplied from a nozzle facing the substrate surface to the substrate surface, and the processing liquid is spread on the substrate surface by a centrifugal force of the rotation. In such substrate processing, the processing liquid supplied onto the substrate is discharged at a speed corresponding to the processing conditions, and new processing liquids are sequentially supplied.

In general, various processing conditions relating to the rotation of the substrate and the supply of the processing liquid are set to conditions that can ensure the uniformity of the substrate processing.

In such spin-type substrate processing, since the processing liquid stays on the substrate for a long time depending on the processing conditions, particles precipitated in the processing liquid on the substrate may precipitate in the processing liquid. If precipitation occurs in the processing liquid, processing performance such as etching rate or resist removal performance, cleaning ability, etc. is degraded. Therefore, a substrate processing apparatus, a substrate processing method, and a substrate manufacturing method capable of ensuring high processing performance are desired.

Disclosure of Invention

A substrate processing apparatus according to an aspect of the present invention includes: a substrate support portion for supporting the substrate; a rotating unit configured to rotate the substrate; a processing liquid supply unit configured to supply a processing liquid to a surface of the substrate; and a control unit that performs control so that, during a period in which the processing liquid is continuously supplied from the processing liquid supply unit to the substrate rotated by the rotation unit and substrate processing is continuously performed while the processing liquid is discharged from the substrate in one substrate processing step, a drain process for increasing a drain rate of the processing liquid discharged from the substrate is periodically performed at a predetermined timing, and the drain process is ended at the end of the substrate processing.

A method for manufacturing a substrate according to an aspect of the present invention includes: rotating the substrate; supplying a treatment liquid to the surface of the substrate; in one substrate treatment process, while continuously supplying the treatment liquid to the rotating substrate and continuously performing the substrate treatment while discharging the treatment liquid from the substrate, a liquid discharge treatment is periodically performed at a predetermined timing, the liquid discharge treatment increasing a liquid discharge rate at which the treatment liquid supplied to the substrate moves from the substrate by increasing the rotation speed of the rotation and increasing the supply amount of the treatment liquid, and the liquid discharge treatment is ended at the end of the substrate treatment.

A substrate processing apparatus according to an aspect of the present invention includes: a substrate support portion for supporting the substrate; a rotating unit configured to rotate the substrate; a processing liquid supply unit configured to supply a processing liquid to a surface of the substrate; and a control unit that continues a process in a substrate process in which the supply of the processing liquid is performed while rotating the substrate, and performs a liquid discharge process in which a liquid discharge rate at which the processing liquid is discharged from the substrate is changed at a predetermined timing.

A substrate processing method according to another aspect of the present invention includes: rotating the substrate; supplying a treatment liquid to the surface of the substrate; heating the substrate by a heater disposed opposite to the substrate; in the substrate processing, the liquid discharge rate at which the processing liquid is discharged from the substrate is changed by any 1 or more kinds of processing in which the rotation speed of the rotation is increased, the supply amount of the processing liquid is increased, and the gap between the substrate and the heater is narrowed while the processing is continued at a predetermined timing set in advance.

A substrate processing method according to another aspect of the present invention includes: rotating the substrate; supplying a treatment liquid to the surface of the substrate; heating the substrate by a heater disposed opposite to the substrate; in the substrate processing, the liquid discharge speed of the processing liquid from the substrate is changed by any 1 or more kinds of processing of increasing the rotation speed of the rotation, increasing the supply amount of the processing liquid, and narrowing the gap between the substrate and the heater while continuing the processing at a predetermined timing set in advance.

According to the embodiments, a substrate processing apparatus, a substrate processing method, and a substrate manufacturing method capable of ensuring high processing performance can be provided.

Other objects and advantages of the present invention will become apparent from the following description, or may be apparent from the embodiments of the invention. Also, various objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate presently preferred embodiments of the invention and, together with the general description given above and the detailed description of the preferred embodiments given below, serve to explain the nature of the invention.

Fig. 1 is an explanatory view showing a configuration of a substrate processing apparatus according to embodiment 1 of the present invention.

Fig. 2 is a flowchart of substrate processing by the substrate processing apparatus.

Fig. 3 is an explanatory diagram showing a change in the position of a heater acting on the substrate processing apparatus.

Fig. 4 is a graph showing the sequence of the rotation speed of the substrate processing apparatus.

Fig. 5 is a graph showing the order of the positions of the heaters according to embodiment 2 of the present invention.

Fig. 6 is an explanatory diagram showing a change in position of the heater according to the second embodiment.

Fig. 7 is a graph showing the procedure of the supply amount of the treatment liquid according to embodiment 3 of the present invention.

Detailed Description

[ embodiment 1 ]

Hereinafter, a substrate processing apparatus and a substrate processing method according to embodiment 1 of the present invention will be described with reference to fig. 1 to 3. Fig. 1 is an explanatory diagram showing a configuration of a substrate processing apparatus according to embodiment 1, and fig. 2 is a process flow chart of the substrate processing apparatus. Fig. 3 is an explanatory diagram showing a change in the position of the heater, and fig. 4 is a graph showing the sequence of the rotation speed. In the drawings, the structure is appropriately enlarged, reduced, or omitted for explanation.

As shown in fig. 1 and 2, the substrate processing apparatus 1 includes a processing chamber 10 constituting a processing chamber, a substrate support unit 20 for rotatably supporting a substrate W, a heater 30 for heating the substrate W and a processing liquid L1, a processing liquid supply unit 40 for supplying the processing liquid onto the substrate, a cup 50 for receiving a drain liquid, and a control unit 60 for controlling operations of the respective units.

The substrate support portion 20 includes a support base 21 for supporting the substrate, and a rotation mechanism 22 as a rotation portion for rotating the support base 21.

The support table 21 is provided in the processing chamber 10, and has a horizontal mounting surface 21a on an upper surface thereof. A plurality of fixing portions 23 for detachably fixing, for example, a substrate are provided on the periphery of the mounting surface 21a of the support base 21. The substrate support portion 20 detachably supports a substrate W such as a wafer or a liquid crystal substrate in a horizontal state on a mounting surface 21a of the support table 21.

The rotation mechanism 22 is connected to the controller 60, and rotates and drives the support base 21 at a desired rotation speed in a predetermined horizontal plane under the control of the controller 60. Therefore, the substrate support portion 20 is configured to be able to adjust the rotation speed of the support table 21.

The heater 30 includes a heating plate 31 and a lifting mechanism 32 for lifting and lowering the heating plate 31. The heating plate 31 has a heating surface 31a larger than the surface Wa of the substrate W. The heating plate 31 is supported by the elevating mechanism 31 such that the heating surface 31a faces the surface Wa of the substrate W. The heating plate 31 is connected to the control unit 60 and is configured to be temperature-adjustable. The main surface of the heater plate 31 has a larger area than the substrate W and is circular in plan view so as to cover the substrate W.

The elevating mechanism 32 is connected to the controller 60, and moves the heater plate 31 in the vertical direction under the control of the controller 60 to stop at a predetermined position. That is, the heater 30 is configured to be able to adjust the vertical position of the heater plate 31. Therefore, the gap size G formed between the heating surface 31a and the surface Wa of the substrate W can be adjusted. In the present embodiment, as shown in fig. 3, the heating plate 31 is movable to be positioned to, for example, the 1 st position where the gap size is G1, and the 2 nd position where the gap size is G2 smaller than G1.

For example, the 1 st position is a retracted position where the surface Wa, which is the upper surface of the substrate W, is separated from the heating surface 31a by a predetermined distance. The 2 nd position is, for example, a processing position at which at least a part of the gap between the heating surface 31a and the surface Wa of the substrate W is filled with the processing liquid L1, in other words, at least a part of the processing liquid L1 is in contact with the heating surface 31 a.

The treatment liquid supply unit 40 includes a nozzle 41 disposed to face the upper side of the support base 21 and a supply mechanism 42 connected to the nozzle. The supply mechanism 42 includes, for example, a tank 43 that stores the processing liquid L1 sent to the nozzle 41, a pump 44 that is a power source for pressure-feeding the processing liquid L1, a pipe that forms a flow path 45 connecting the tank 43 and the nozzle 41, and an opening/closing valve 46 that opens and closes the flow path 45.

In the present embodiment, a chemical liquid such as a phosphoric acid aqueous solution, sulfuric acid, or a mixed solution thereof is used as the treatment liquid L1.

The nozzle 41 is disposed through the inside of the heating plate 31. For example, the tip of the nozzle 41 is disposed at the center of the heating surface 31a and is disposed to face the center of the support base 21 so as to open upward. Therefore, the nozzle 41 is configured to be movable up and down in accordance with the movement of the heater plate 31.

The pump 44 and the on-off valve 46 provided in the supply mechanism 42 are connected to the control unit 60, and are configured to be able to control the operation of the supply mechanism 42. Therefore, the treatment liquid supply unit 40 is configured such that the supply timing and the supply amount of the treatment liquid can be adjusted by the control unit 60.

The cup 50 is formed in a cylindrical shape, for example. The cup 50 is disposed to cover the periphery and the lower side of the substrate W and receives the drain liquid flowing down from the substrate W. The cup 50 is provided with a drain pipe 51 for discharging the accumulated waste liquid to the outside.

The control unit 60 includes a processor for controlling various driving units of the substrate processing apparatus 1, a memory for storing various information, and a driving circuit for driving the elements.

The controller 60 is connected to the rotation mechanism 22, the elevation mechanism 32, and the supply mechanism 42 of the substrate processing apparatus 1. The processor controls the operation of each unit based on information such as various control programs and operation conditions, and realizes various functions of the substrate processing apparatus. The processor drives the rotating mechanism 22, the elevating mechanism 32, the pump 44, the supply mechanism 42 such as the on-off valve 46, and the like in accordance with various operating conditions and control programs.

That is, the processor executes a control process based on the control program, and the control unit 60, which is a central portion of the processor, controls the rotation operation of the substrate, the lifting operation of the heater, and the supply operation of the processing liquid. Therefore, the control unit 60 functions as a rotation speed adjustment unit that adjusts the rotation speed, a gap adjustment unit that adjusts the gap, and a liquid amount adjustment unit that adjusts the supply amount of the treatment liquid. In the present embodiment, the controller 60 functions as a drain unit that performs a drain process for increasing the drain rate, which is the flow rate of the processing liquid L1 when the processing liquid L1 is drained from the substrate W, by adjusting the rotation speed. The substrate treatment in the present invention includes a normal treatment for obtaining uniformity of the treatment rate in the central portion and the peripheral portion of the substrate W, and a liquid discharge treatment. The liquid discharge treatment in the present invention is a treatment in which the liquid discharge rate is increased as compared with the normal treatment while the substrate treatment is continued.

Hereinafter, a substrate processing method and a substrate manufacturing method according to the present embodiment will be described with reference to fig. 1 to 4. Here, an etching process in which a phosphoric acid aqueous solution as the processing liquid L1 is supplied to a nitride film formed on a substrate W to perform a processing is described as an example of a substrate processing method and a substrate manufacturing method. The deposited particles are silicon oxide for explanation. The substrate processing in the present invention refers to a chemical cleaning process among a series of processes (chemical cleaning, rinsing, and drying) of the substrate W.

In the standby state, the heater plate 31 is retracted to the 1 st position, and the heating surface 31a is sufficiently separated from the support base 21. For example, the gap size G1 in the standby state is set to 150mm or more. In the standby state, the rotation of the support base 21 is stopped.

First, when the control unit 60 detects an instruction for substrate processing (ST1), it sets a substrate W to be processed (ST 2). Specifically, the substrate W to be processed is carried into the processing chamber 10 and placed on the support table 21. Subsequently, the fixing portion 23 is driven to fix the substrate W.

Next, the controller 60 drives the rotation mechanism 22 to rotate the support base 21 at a predetermined 1 ST rotation speed R1 (ST 3). The 1 st rotation speed R1 is a rotation speed at which the uniformity of substrate processing can be ensured, and is set to, for example, within 300 rpm. In the present embodiment, R1 is set to 150 rpm.

The controller 60 drives the heater 30 to set the temperature of the heater plate 31 to a predetermined temperature. The controller 60 drives the elevating mechanism 32 to lower the heater plate 31 to a predetermined position (ST 4). Specifically, the heating plate 31 is lowered to the 2 nd position. The 2 nd position is, for example, a processing position having a gap size G2. The gap size G2 is, for example, a size in which at least a part of the gap G is filled with the processing liquid L1 supplied to the substrate W, and is set to 1.5mm, for example, in the present embodiment.

The controller 60 drives the supply mechanism 42 to supply the processing liquid L1 from the nozzle 41 onto the substrate W at a predetermined 1 ST flow rate Q1 (ST 5). The 1 st flow rate Q1 is a flow rate at which uniformity of processing of the substrate W can be obtained, and is set to, for example, 0.55l/m in Q1 in the present embodiment.

Further, the controller 60 increases the liquid discharge velocity V, which is the flow velocity at which the processing liquid L1 is discharged from the substrate W, at a predetermined timing, and performs a liquid discharge process for promoting liquid discharge while performing the substrate process during the substrate process (ST 6). That is, by performing the treatment at the 2 nd rotation speed R2 after the treatment at the 1 st rotation speed R1, the liquid discharge treatment can be further performed while continuing the treatment. Specifically, the drain velocity V at which the processing liquid L1 is drained from the substrate W is increased by increasing the centrifugal force by periodically increasing the rotation speed to the 2 nd rotation speed R2. For example, the 2 nd rotation speed R2 is set to be larger than the 1 st rotation speed R1 in the range of 300 to 600 rpm.

As shown in fig. 4, the timing of the liquid discharge treatment, for example, the timing of starting the liquid discharge treatment, is set based on the time when the treatment liquid L1 stagnates and precipitates, that is, the time when the particles are precipitated during the substrate treatment. For example, the liquid discharge treatment is performed every time a certain time shorter than the time at which the precipitation of the particles is started.

As shown in fig. 4, the time for performing the liquid discharge treatment at the 2 nd rotation speed R2 is set shorter than the time for performing the substrate treatment (normal treatment) at the 1 st rotation speed R1.

The particles are reaction products, films to be processed, and the like deposited in the processing liquid L1 accumulated on the substrate W during the process of processing the substrate W. The reaction product and the film to be processed are dissolved in the processing liquid present on the substrate W after the start of the processing, and if the processing time of the substrate W is accumulated, the reaction product and the film to be processed are not completely dissolved in the processing liquid L1 present on the substrate W after the reaction product and the film to be processed have been dissolved, and are deposited as particles. Examples of the particles include reaction products such as silicon oxide deposited in the processing liquid L1 on the substrate W in the etching process with the phosphoric acid aqueous solution, and residues of the film to be processed such as a resist deposited in the processing liquid L1 on the substrate W in the resist removal with sulfuric acid. If the processing liquid L1 containing these particles is present on the substrate W, the reaction rate of the processing liquid L with respect to the film to be processed on the substrate W is lowered, or the processing rate of etching of the substrate W is lowered, which may cause deterioration of the resist removal performance.

In the present embodiment, the liquid discharge treatment is performed every 30 seconds for 5 seconds 1 time. The above processing of ST 5-ST 6 is repeated until the substrate processing is ended (ST 7). That is, the substrate W is processed with the processing liquid L1, which is the same type of processing liquid, until the substrate processing is completed, and the liquid discharge processing is performed at a predetermined timing during the processing. If a predetermined time has elapsed since the start of the processing, the controller 60 stops the supply of the processing liquid L1 and terminates the substrate processing (ST 8). Subsequently, a rinsing treatment is appropriately performed.

In addition, if the scheduled processing time a is set in advance, the number of sets to be repeated can be set in advance as a processing list by dividing the scheduled processing time a by the time T at which the substrate processing (normal processing) and the liquid discharge processing become 1 set.

In addition, when N times of the time T of the group 1 of the substrate processing (normal processing) at the 1 st rotation speed R1 and the liquid discharge processing at the 2 nd rotation speed R2 exceeds the preset processing scheduled time a, that is, when the processing scheduled time a is divided by the time T to generate a remainder, the time of the substrate processing (normal processing) of the group N is adjusted, and the time of the liquid discharge processing of the group N does not change. As an example, the normal treatment and the liquid discharge treatment were repeated twice (two sets), and the time for the substrate treatment of the 3 rd set was 5 seconds, and the time for the liquid discharge treatment was 5 seconds. In this way, the time for each 1 time of the liquid discharge treatment performed plural times is the same time.

In the present embodiment, the substrate processing is performed at the 1 st rotation speed R1, for example, for 25 seconds as a normal process from the start of the process (t 1). After the treatment at the 1 st rotation speed R1, the liquid discharge treatment is started (t2), the treatment is performed at the 2 nd rotation speed R2, and if 5 seconds have elapsed, the liquid discharge treatment at the 2 nd rotation speed R2 is ended (t 3). The substrate treatment (normal treatment) and the liquid discharge treatment were repeated as 1 set until the treatment was completed (t 4). In the case of repetition, after the liquid discharge treatment is completed, the substrate processing (normal processing) is performed again at the 1 st rotation speed R1 by decelerating from the 2 nd rotation speed R2 to the 1 st rotation speed R1. In the present embodiment, as shown in fig. 4, the liquid discharge treatment is performed immediately before the completion of the treatment.

In the substrate processing according to the present embodiment, the processing liquid is continuously supplied. That is, the treatment liquid L1 was continuously supplied during the liquid discharge treatment. Thus, the liquid discharge treatment can be performed while the substrate treatment is continued.

According to the substrate processing apparatus, the substrate processing method, and the substrate manufacturing method according to the present embodiment, the following effects can be obtained. That is, the liquid discharge speed of the processing liquid L1 moving from the substrate W can be increased by changing the rotation speed during the substrate processing, for example, by periodically increasing the rotation speed. Therefore, the liquid discharge can be periodically promoted, and the replacement with a new treatment liquid can be promoted. Therefore, in the processing liquid L1 on the substrate W, for example, deposition of particles due to accumulation of the processing time of the substrate W and dissolution of the reaction product of the film to be processed on the substrate W into the processing liquid L1 can be prevented. Therefore, a decrease in the processing rate due to the deposition of particles can be prevented, and a decrease in the processing efficiency can be prevented.

The time for performing the liquid discharge treatment at the 2 nd rotation speed R2 is set shorter than the time for performing the substrate treatment (normal treatment) at the 1 st rotation speed R1. Thus, the particles can be periodically discharged by the liquid discharge treatment at the 2 nd rotation speed, and the treatment can be performed to maintain the treatment rate at the 1 st rotation speed R1 and to obtain uniformity.

In the present embodiment, since the liquid discharge treatment is realized by controlling the rotation mechanism 22 for substrate treatment and periodically increasing the rotation speed, it is possible to improve the treatment efficiency by using existing equipment without introducing a new mechanism.

Further, since the liquid discharge acceleration treatment is performed immediately before the completion of the substrate treatment, even when particles are likely to be deposited, for example, in the case where the temperature is lowered by performing the rinsing treatment with cleaning water having a temperature lower than that of the treatment liquid L1 in the next step, the replacement of the treatment liquid can be accelerated, and the reduction in the treatment efficiency can be effectively prevented.

[ 2 nd embodiment ]

Hereinafter, a substrate processing apparatus, a substrate processing method, and a substrate manufacturing method according to embodiment 2 of the present invention will be described with reference to fig. 5 and 6. Fig. 5 is a graph showing the order of the heater positions in the present embodiment, and fig. 6 is an explanatory diagram showing the change in the heater positions. In the present embodiment, the treatment for changing the gap G between the substrate W and the heater plate 31 is performed as the liquid discharge treatment, but the other apparatus configuration and the treatment procedure are the same as those in the above embodiment 1, and common descriptions are omitted.

In the present embodiment, the controller 60 drives the elevating mechanism 32 to periodically lower the heater plate 31 from the 2 nd position positioned as the processing position to the 3 rd position as the liquid discharge processing in the substrate processing. Specifically, the liquid discharge treatment was performed by positioning the hot plate 31 to the 3 rd position for 30 seconds 1 time and 5 seconds.

That is, for example, as shown in fig. 5, the heating plate 31 is lowered from the initial 1 st position to be positioned at the 2 nd position, and the treatment liquid is supplied to start the treatment (t 1). After the substrate processing is performed for 25 seconds with the heater plate 31 disposed at the 2 nd position as the normal processing (t2), the heater plate 31 is further lowered from the 2 nd position to move to the 3 rd position (t 2). Next, the liquid discharge treatment was performed for 5 seconds with the heating plate 31 disposed at the 3 rd position (t 3). The substrate treatment (normal treatment) and the liquid discharge treatment were repeated as 1 set until the treatment was completed (t 4). In the case of repetition, after the drain treatment is completed, the heating plate 31 is raised from the 3 rd position to the 2 nd position, and the treatment of the substrate W is performed in a state where the substrate is positioned at the 2 nd position again. In the present embodiment, the liquid discharge treatment is also performed immediately before the end of the substrate treatment (t 4). As shown in fig. 5, the time for performing the liquid discharge treatment while positioning the heating plate 31 at the 3 rd position is set shorter than the time for performing the substrate treatment while positioning the heating plate 31 at the 2 nd position.

In the substrate processing according to the present embodiment, the processing liquid is continuously supplied. That is, the treatment liquid L1 was continuously supplied during the liquid discharge treatment. Thus, the liquid discharge treatment can be performed while the substrate treatment is continued.

As shown in fig. 6, the 3 rd position is a drain position in which the heating surface 31a abuts at least a part of the processing liquid L1, and the gap size G3 between the front surface Wa of the substrate W and the heating surface 31a is smaller than G2, thereby facilitating the drainage of the processing liquid L1 from the substrate W. The gap size G3 is set to 1.2mm, for example.

The processor executes a control process based on a control program, and the control unit 60, which is a central portion of the processor, controls the rotation of the substrate, the elevation of the heater, and the supply of the processing liquid. Therefore, the control unit 60 functions as a rotation speed adjustment unit that adjusts the rotation speed, a gap adjustment unit that adjusts the gap, and a liquid amount adjustment unit that adjusts the supply amount of the treatment liquid. That is, in the present embodiment, the control unit 60 functions as a liquid discharge unit that performs liquid discharge treatment for increasing the liquid discharge rate by the gap adjustment.

According to the substrate processing apparatus, the substrate processing method, and the substrate manufacturing method according to the present embodiment, the same effects as those of embodiment 1 can be obtained. That is, the gap G is periodically changed, for example, periodically narrowed during the substrate processing, so that the flow path cross-sectional area can be reduced, and the liquid discharge speed of the processing liquid moving from the substrate can be increased to promote the liquid discharge. Therefore, stagnation of the processing liquid on the substrate can be prevented, and replacement with a new processing liquid can be promoted. Therefore, the deposition of particles during the process on the substrate can be prevented from deteriorating the process efficiency. The time for performing the liquid discharge treatment while positioning the heating plate 31 at the 3 rd position is set shorter than the time for performing the substrate treatment (normal treatment) while positioning the heating plate 31 at the 2 nd position. Thus, the particles can be periodically discharged by the liquid discharge treatment at the 3 rd position, and the treatment which can be made uniform can be performed while maintaining the treatment rate at the 2 nd position.

In the present embodiment, since the liquid discharge treatment is performed by using the elevating mechanism of the heater 30, the treatment efficiency can be improved by using the existing equipment without introducing a new mechanism. Further, since the liquid discharge acceleration treatment is performed before the completion of the substrate treatment, even when the particles are likely to be deposited due to, for example, a temperature drop in the next step, the replacement of the treatment liquid can be accelerated, and the reduction in treatment efficiency can be effectively prevented.

[ embodiment 3 ]

Hereinafter, a substrate processing apparatus, a substrate processing method, and a substrate manufacturing method according to embodiment 3 of the present invention will be described with reference to fig. 7. Fig. 7 is a graph showing the procedure of the supply amount of the treatment liquid according to the present embodiment. In the present embodiment, the treatment for periodically increasing the supply amount of the treatment liquid is performed as the liquid discharge treatment, but the other device configurations and the treatment procedure are the same as those in embodiment 1 described above, and common descriptions are omitted.

In the present embodiment, the controller 60 controls the supply mechanism 42 to periodically increase the supply amount of the processing liquid L1 as the liquid discharge processing in the substrate processing. Specifically, the processing liquid L1 was supplied at a predetermined flow rate Q1 from the start of substrate processing, and the flow rate was periodically increased to Q2. For example, the liquid discharge treatment is performed between 1 time and 5 seconds for 30 seconds.

For example, as shown in fig. 7, a plurality of steps are repeated until the processing of the substrate W is completed (t4) by performing the steps of starting the processing (t1), performing the substrate processing (normal processing) in which the processing liquid L1 is supplied at the 1 st flow rate Q1 for 25 seconds (t2), switching the flow rate to the 2 nd flow rate Q2, and performing the drain processing in which the processing liquid L1 is supplied at the 2 nd flow rate Q2 for 5 seconds (t 3). In the case of repetition, after the completion of the liquid discharge treatment, the flow rate was decreased from Q2 to Q1, and the treatment liquid L1 was supplied again at the flow rate Q1 to perform the treatment of the substrate W. In this embodiment, the liquid discharge treatment is also performed before the substrate treatment is completed. Further, the time for performing the liquid discharge treatment for supplying the processing liquid L1 at the 2 nd flow rate Q2 was set shorter than the time for performing the substrate processing for supplying the processing liquid L1 at the 1 st flow rate Q1. Thus, the particles can be periodically discharged by the liquid discharge treatment in which the treatment liquid L1 is supplied at the 2 nd flow rate Q2, and the treatment can be performed with uniformity while the treatment liquid L1 is supplied at the 1 st flow rate Q1 to maintain the treatment rate.

The 2 nd flow rate Q2 is set to a desired flow rate larger than Q1 and capable of increasing the discharge rate of the treatment liquid L1. For example, in the present embodiment, Q1 is set to 0.55l/ms, and Q2 is set to 0.65 l/m.

The processor executes a control process based on a control program, and the control unit 60, which is a central portion of the processor, controls the rotation of the substrate, the elevation of the heater, and the supply of the processing liquid. Therefore, the control unit 60 functions as a rotation speed adjustment unit that adjusts the rotation speed, a gap adjustment unit that adjusts the gap, and a liquid amount adjustment unit that adjusts the supply amount of the treatment liquid. That is, in the present embodiment, the control unit 60 functions as a liquid discharging unit that performs liquid discharging processing for increasing the liquid discharging speed by adjusting the amount of the processing liquid supplied.

According to the substrate processing apparatus, the substrate processing method, and the substrate manufacturing method according to the present embodiment, the same effects as those of embodiment 1 can be obtained. That is, by periodically increasing the flow rate of the processing liquid L1 during the substrate processing, the liquid discharge speed of the processing liquid L1 from the substrate W can be increased, and the liquid discharge can be periodically promoted. Therefore, stagnation of the processing liquid on the substrate can be prevented, and replacement with a new processing liquid can be promoted. Therefore, the deposition of particles in the processing liquid on the substrate can be prevented from deteriorating the processing efficiency.

The time for performing the liquid discharge treatment in which the treatment liquid L1 was supplied at the 2 nd flow rate Q2 was set shorter than the time for performing the substrate treatment (normal treatment) in which the treatment liquid L1 was supplied at the 1 st flow rate Q1.

In the present embodiment, since the liquid discharge treatment is performed by using the supply mechanism of the treatment liquid, the treatment efficiency is improved by using the existing equipment without introducing a new mechanism. Further, since the liquid discharge acceleration treatment is performed immediately before the completion of the substrate treatment, even when particles are likely to be deposited, for example, during a subsequent process, such as a temperature drop, the replacement of the treatment liquid can be accelerated, and a drop in treatment efficiency can be effectively prevented.

In the substrate processing according to the present embodiment, the processing liquid is continuously supplied. That is, the treatment liquid L1 was continuously supplied during the liquid discharge treatment. Thus, the liquid discharge treatment can be performed while the substrate treatment is continued.

The present invention is not limited to the above embodiments, and constituent elements may be modified and embodied in the implementation stage.

For example, a plurality of embodiments may be combined. That is, the liquid discharge speed of the processing liquid from the substrate may be increased by appropriately combining any one or more of the processes of increasing the rotation speed at a predetermined timing, increasing the flow rate of the processing liquid, and decreasing the distance between the substrate and the heater.

In the above embodiment, the example of moving the heating plate 31 side is shown, but the present invention is not limited to this. For example, a lifting mechanism for lifting the support base 21 may be further provided, and the substrate may be lifted instead of or in addition to the lifting of the heater when the relative distance is adjusted. In addition to the rotation of the support base 21, the heating plate 31 can also be rotated.

For example, in the above embodiment, a chemical solution such as a phosphoric acid aqueous solution, sulfuric acid, or a mixed solution thereof is exemplified as the treatment solution L1, but the present invention is not limited thereto. For example, instead of these chemical solutions, pure water may be supplied to perform substrate processing for cleaning the substrate. Further, two tanks 43 may be connected to the nozzle 41, the chemical liquid and the deionized water may be stored in each tank 43, and the supplied liquids may be switched at predetermined timings, so that, for example, the cleaning may be performed by supplying the chemical liquid continuously to perform the substrate processing and then supplying the deionized water.

While the embodiments of the present invention have been described above, these embodiments are illustrative and are not intended to limit the scope of the invention. These new embodiments may be implemented in other various forms, and various omissions, substitutions, and changes may be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.