JP2024016703A - Substrate cleaning equipment and substrate cleaning method - Google Patents

Abstract

The present invention provides a substrate cleaning device and a substrate cleaning method that can reduce downtime due to cleaning brush replacement. SOLUTION: A substrate cleaning apparatus 100 includes a substrate rotation holder that holds and rotates a substrate W, and a first cleaning device that is inclined so as to be able to contact a first bevel area of the substrate W held by the substrate rotation holder. a first cleaning brush having a surface, a first contact state in which the first cleaning surface contacts a first bevel region of the substrate rotated by the substrate rotation holder; a first driving section configured to move the first cleaning brush to a first separated state in which the first cleaning surface is separated from the first bevel region; and a first predetermined condition. and a control section 60 that controls the first drive section so that when the condition is satisfied, the contact position of the first cleaning surface with respect to the first bevel region in the first contact state is changed. [Selection diagram] Figure 1

Description

The present invention relates to a substrate cleaning apparatus and a substrate cleaning method.

In a substrate processing apparatus, a substrate having a beveled portion at the periphery of an upper surface and a lower surface may be processed. For example, if the substrate is subjected to exposure processing with the bevel portion of the substrate contaminated, the exposure stage will be contaminated. In addition, in an immersion exposure apparatus that uses immersion liquid for exposure, if exposure is performed with the bevel part of the substrate contaminated, the lens of the exposure apparatus will be contaminated, resulting in dimensional and shape defects in the exposed pattern. This may occur. Therefore, for example, as described in Patent Document 1, a substrate cleaning apparatus having a cleaning brush for cleaning the bevel portion is used. Further, various film formation processes are performed on the substrate, and the bevel portion of the substrate may become contaminated during the film formation process.

The cleaning brush described in Patent Document 1 has a rotationally symmetrical shape with respect to a vertical axis, and includes a lower bevel cleaning surface and an upper bevel cleaning surface. In cleaning the bevel portion of the substrate, the lower bevel cleaning surface of the cleaning brush comes into contact with the bevel portion of the lower surface of the substrate held and rotated by the spin chuck. Similarly, the upper bevel cleaning surface of the cleaning brush comes into contact with the bevel portion of the upper surface of the rotating substrate.

Japanese Patent Application Publication No. 2009-032889

However, if the cleaning brush is used continuously, grooves may be formed on the bevel cleaning surface due to friction between the bevel portion of the substrate and the bevel cleaning surface of the cleaning brush. Additionally, the beveled cleaning surface of the cleaning brush becomes contaminated. Therefore, it is necessary to periodically replace the cleaning brush. In the cleaning brush replacement work, it is necessary to remove the cleaning brush, replace the cleaning brush, teach the cleaning brush after replacement, start up the cleaning brush, and monitor and check the operation of the cleaning brush after replacement. Therefore, a large amount of downtime occurs in the operation of the substrate processing apparatus. In recent years, with the increase in device production, there is a need to reduce downtime in substrate processing.

An object of the present invention is to provide a substrate cleaning apparatus and a substrate cleaning method that can reduce downtime due to cleaning brush replacement.

(1) A substrate cleaning apparatus according to one aspect of the present invention is a substrate cleaning apparatus that cleans a substrate having a first main surface and a first bevel region at the peripheral edge of the first main surface, a first cleaning brush having a first cleaning surface inclined so as to be able to contact a first beveled area of the substrate held by the substrate rotation holding part; a first contact state in which the first cleaning surface is in contact with a first bevel region of the substrate rotated by the substrate rotation holding section; and a first contact state in which the first cleaning surface is separated from the first bevel region of the substrate rotated by the substrate rotation holding section. a first drive unit configured to move the first cleaning brush to a first separated state in which the cleaning brush is moved to a first separated state; and a control section that controls the first drive section so that the contact position of the first cleaning surface with respect to the first bevel region is changed.

(2) A substrate cleaning method according to another aspect of the present invention is a substrate cleaning method for cleaning a substrate having a main surface and a beveled region at the peripheral edge of the main surface, the method cleaning one substrate among a plurality of substrates. a step of sequentially bringing an inclined cleaning surface of a cleaning brush into contact with a beveled area of one substrate by a drive unit for a plurality of substrates while being held and rotated by a substrate rotation holding unit; and a step in which a predetermined condition is satisfied. controlling the drive so that the contact position of the cleaning surface with respect to the bevel region is changed when the cleaning surface is in contact with the bevel region.

According to the present invention, downtime due to cleaning brush replacement can be reduced.

1 is a schematic side view of a substrate cleaning apparatus according to an embodiment of the present invention. FIG. 3 is a schematic cross-sectional view for explaining the shape of the peripheral edge of the substrate. FIG. 6 is a diagram showing the state of the substrate and the cleaning brush when cleaning the peripheral portion of the substrate. FIG. 6 is a diagram showing the state of the substrate and the cleaning brush when cleaning the peripheral portion of the substrate. It is a figure which shows the example of a change of the contact position of a cleaning brush at the time of cleaning. 3 is a flowchart illustrating an example of the operation of the substrate cleaning apparatus 100. FIG. 7 is a schematic side view of a substrate cleaning apparatus according to another embodiment. FIG. 6 is a diagram illustrating an example of cleaning a substrate with a plurality of cleaning brushes.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A substrate cleaning apparatus and a substrate cleaning method according to an embodiment of the present invention will be described in detail below with reference to the drawings. In the following description, substrates include semiconductor substrates (semiconductor wafers), FPD (Flat Panel Display) substrates used in liquid crystal display devices, organic EL (Electro Luminescence) display devices, etc., optical disk substrates, magnetic disk substrates, Refers to magneto-optical disk substrates, photomask substrates, ceramic substrates, solar cell substrates, etc. In addition, the substrate described below has a circular shape in plan view except for the notch formation part.

(1) Substrate Cleaning Apparatus FIG. 1 is a schematic side view of a substrate cleaning apparatus 100 according to an embodiment of the present invention. As shown in FIG. 1, the substrate cleaning apparatus 100 includes a spin chuck 10, a cleaning brush 20, an arm 30, an arm drive section 40, a brush rotation drive section 50, a control section 60, and a display section 70.

In the substrate cleaning apparatus 100, the substrate W is carried in and out of the substrate cleaning apparatus 100 by a transport robot (not shown). The spin chuck 10 includes a holding section 11 and a chuck rotation drive section 12. The substrate W carried in by the transfer robot is placed on the holding section 11 . A plurality of air intake passages (not shown) are formed in the holding part 11 , and the lower surface of the substrate W is vacuum-adsorbed onto the holding part 11 by evacuating the inside of the air intake passage. Thereby, the holding unit 11 holds the substrate W in a horizontal position. A chuck rotation drive unit 12 is connected to the holding unit 11 via a connecting member. The chuck rotation drive section 12 includes, for example, an electric motor, and is configured to be able to rotate the holding section 11. As a result, the substrate W held in the holding section 11 in a horizontal position rotates.

Lower surface cleaning nozzles 13 and 14 are provided near the holding unit 11, respectively, and supply cleaning liquid toward the lower surface of the substrate W held in a horizontal position. A top surface cleaning nozzle 15 is provided above the holding section 11, and supplies a cleaning liquid toward the top surface of the substrate W held in a horizontal position. The cleaning liquid discharged from the lower surface cleaning nozzles 13 and 14 and the upper surface cleaning nozzle 15 spreads outward due to the centrifugal force caused by the rotation of the substrate W.

A cleaning brush 20 supported by an arm 30 is arranged outside the spin chuck 10. Details of the cleaning brush 20 will be described later. The arm drive unit 40 includes, for example, an actuator, and is configured to be able to move the cleaning brush 20 supported by the arm 30 three-dimensionally. The brush rotation drive unit 50 includes, for example, an electric motor, and is configured to be able to rotate the cleaning brush 20 supported by the arm 30 around a vertical axis. In the present embodiment, the brush rotation driving section 50 rotates the cleaning brush 20 in a direction opposite to the direction in which the substrate W held by the holding section 11 rotates. In this state, the arm drive section 40 moves the cleaning brush 20 in the horizontal direction. Thereby, the cleaning brush 20 and the peripheral edge of the rotating substrate W come into contact with each other, so that the peripheral edge of the substrate W is cleaned.

The control unit 60 includes a CPU (central processing unit), a RAM (random access memory), a ROM (read only memory), a storage device, and the like. The control unit 60 controls the operations of the spin chuck 10 and the arm drive unit 40. Details of the control unit 60 will be described later. The display section 70 displays various information regarding cleaning of the substrate W.

FIG. 2 is a schematic cross-sectional view for explaining the shape of the peripheral edge of the substrate W. The peripheral portion of the substrate W carried into the substrate cleaning apparatus 100 of this embodiment includes an annular bevel portion R. The bevel portion R includes an annular bevel region A that slopes so as to be continuously connected to the upper surface WU of the substrate W, and an annular bevel region B that slopes so as to continuously connect to the lower surface WD of the substrate W. The inclination angle θ1 of the bevel region A with respect to the vertical axis and the inclination angle θ2 of the bevel region B with respect to the vertical axis are substantially equal. The length of the bevel region A in the width direction (the length in the vertical cross section) is set to LA1, and the length of the bevel region B in the width direction (the length in the vertical cross section) is set to LB1.

3 and 4 are diagrams showing the states of the substrate W and the cleaning brush 20 during cleaning of the peripheral portion of the substrate W. Cleaning brush 20 includes a cleaning surface 21 , a cleaning surface 22 and a connecting surface 23 . The connecting surface 23 is a cylindrical surface having a vertical axis. The cleaning brush 20 is made of polyvinyl alcohol (PVA), for example, but the material of the cleaning brush 20 is not limited thereto, and other resin materials, ceramic materials, or the like can be used.

As shown in FIG. 3, the cleaning surface 21 has a tapered shape that extends outward and obliquely upward from the upper end of the connection surface 23. The inclination angle θ3 of the cleaning surface 21 of the cleaning brush 20 with respect to the vertical axis is set to be substantially equal to the inclination angle θ1 of the bevel area A of the substrate W. Thereby, it becomes possible to bring the bevel region A of the length LA1 of the substrate W into contact with the cleaning surface 21 of the cleaning brush 20. When cleaning the bevel area A of the bevel portion R of the substrate W, the height of the cleaning brush 20 is adjusted by the arm drive unit 40 to a height where the cleaning surface 21 of the cleaning brush 20 can come into contact with the bevel area A of the substrate W. be done. Thereafter, the cleaning brush 20 moves horizontally from outside the substrate W, so that the cleaning surface 21 of the cleaning brush 20 comes into contact with the bevel area A of the substrate W. Thereby, the bevel area A of the substrate W is cleaned.

As shown in FIG. 4, the cleaning surface 22 has a tapered shape that extends outward and diagonally downward from the lower end of the connection surface 23. The inclination angle θ4 of the cleaning surface 22 of the cleaning brush 20 with respect to the vertical axis is set to be substantially equal to the inclination angle θ2 of the bevel region B of the substrate W. Thereby, it becomes possible to bring the bevel region B of the length LB1 of the substrate W into contact with the cleaning surface 22 of the cleaning brush 20. When cleaning the bevel region B of the bevel portion R of the substrate W, the height of the cleaning brush 20 is adjusted by the arm drive unit 40 to a height where the cleaning surface 22 of the cleaning brush 20 can come into contact with the bevel region B of the substrate W. be done. Thereafter, the cleaning brush 20 moves horizontally from outside the substrate W, so that the cleaning surface 22 of the cleaning brush 20 comes into contact with the bevel region B of the substrate W. Thereby, the bevel region B of the substrate W is cleaned.

Here, when the cleaning surface 21 of the cleaning brush 20 repeatedly cleans the bevel region A of the substrate W, the contact position of the cleaning surface 21 with respect to the bevel region A becomes contaminated or worn. Further, when the cleaning surface 22 of the cleaning brush 20 repeatedly cleans the bevel region B of the substrate W, the contact position of the cleaning surface 22 with respect to the bevel region B becomes contaminated or worn. If contamination on the cleaning surface 21 or the cleaning surface 22 is not removed by cleaning, or if grooves are formed on the cleaning surface 21 or the cleaning surface 22 due to wear, it is determined that the cleaning brush 20 has reached the end of its life, and the cleaning brush 20 will need to be replaced. In the operation example described later, it is possible to extend the life of the cleaning brush 20.

(2) Operation of the substrate cleaning apparatus 100 As described above, the control section 60 controls the operation of the arm drive section 40. Specifically, when cleaning the bevel area A of the bevel portion R of the substrate W, if a predetermined first condition is satisfied, the control unit 60 controls the cleaning brush 20 to clean the bevel area A of the substrate W. The arm drive unit 40 is controlled so that the contact position of the cleaning surface 21 is changed. Similarly, when cleaning the bevel region B of the bevel portion R of the substrate W, if a predetermined second condition is satisfied, the control unit 60 controls the cleaning surface of the cleaning brush 20 for the bevel region B of the substrate W. The arm driving section 40 is controlled so that the contact position of the arm 22 is changed.

The above-mentioned first and second conditions are first and second factors related to contamination or wear of the cleaning surfaces 21 and 22 that may occur due to contact of the cleaning surfaces 21 and 22 with the bevel regions A and B. It means that has reached a predetermined judgment value. The first and second factors may include the number of substrates W cleaned by the cleaning surfaces 21, 22, and the cleaning power of the cleaning surfaces 21, 22 with respect to the bevel areas A, B (for example, the cleaning power of the cleaning surfaces 21, 22 on the bevel areas A, B of the substrate W). , B of the cleaning surfaces 21, 22, etc.), and may also include the cleaning time of the bevel areas A, B by the cleaning surfaces 21, 22. Alternatively, the first and second factors may include multiple factors. For example, the first and second factors may be the number of substrates W cleaned by the cleaning surfaces 21 and 22. In this case, the determination value may be determined depending on the cleaning power of the cleaning surfaces 21 and 22. Specifically, when the cleaning power is high, the determination value is set small, and when the cleaning power is low, the determination value is set large.

In this embodiment, the first and second factors are the number of substrates W cleaned by the cleaning surfaces 21 and 22. In other words, the first and second conditions are whether the number of substrates W cleaned on the cleaning surfaces 21 and 22 has reached the determination value. The determination value is, for example, 1000 sheets, but is not limited to this.

FIG. 5 is a diagram showing an example of changing the contact position of the cleaning brush 20 during cleaning. FIG. 6 is a flowchart showing an example of the operation of the substrate cleaning apparatus 100. As shown in FIG. 5, a plurality of positions corresponding to the length LA1 of the bevel area A are set on the cleaning surface 21, and a plurality of positions corresponding to the length LB1 of the bevel area B are set on the cleaning surface 22. . In the example of FIG. 5, contact positions la1, la2, and la3 are set in this order on the cleaning surface 21 from below, and contact positions lb1, lb2, and lb3 are set in this order on the cleaning surface 22 from below. Each of the contact positions la1, la2, and la3 is a position of an area having a length equal to or greater than the length LA1 of the bevel area A. Each of the contact positions lb1, lb2, and lb3 is a position of an area having a length equal to or greater than the length LB1 of the bevel area B.

In this embodiment, the contact position of the cleaning surface 21 of the cleaning brush 20 with respect to the bevel area A of the substrate W is changed from lower to upper in the order of contact positions la1, la2, and la3. Further, the contact position of the cleaning surface 22 of the cleaning brush 20 with respect to the bevel area B of the substrate W is changed from lower to upper in the order of contact positions lb1, lb2, and lb3. The number of contact positions on the cleaning surfaces 21 and 22 is determined depending on the type of cleaning brush 20. In this embodiment, the number of contact positions on the cleaning surfaces 21 and 22 depending on the type of cleaning brush 20 is stored in advance in the control unit 60.

First, the control unit 60 acquires the number k (k is an integer of 2 or more) of contact positions on each of the cleaning surfaces 21 and 22 stored in advance (step S1 in FIG. 6). Next, the control unit 60 sets a variable n to 1 (step S2). The spin chuck 10 in FIG. 1 holds the loaded substrate W. Next, the arm drive unit 40 adjusts the height of the cleaning brush 20 so that the bevel region B of the substrate W can come into contact with the contact position lbn set on the cleaning surface 22 (step S3). Here, the cleaning liquid is supplied to the lower surface of the substrate W by the lower surface cleaning nozzles 13 and 14 . In this state, the arm drive unit 40 moves the cleaning brush 20 within the horizontal plane so that the contact position lbn of the cleaning surface 22 and the bevel region B of the substrate W come into contact. Thereby, the cleaning brush 20 cleans the bevel region B of the substrate W at the contact position lbn of the cleaning surface 22 (step S4).

Subsequently, the arm drive unit 40 adjusts the height of the cleaning brush 20 so that the bevel area A of the substrate W can come into contact with the contact position lan set on the cleaning surface 21 (step S5). Here, the cleaning liquid is supplied to the upper surface of the substrate W by the upper surface cleaning nozzle 15 . In this state, the arm drive unit 40 moves the cleaning brush 20 within the horizontal plane so that the contact position lan of the cleaning surface 21 and the bevel area A of the substrate W come into contact. Thereby, the cleaning brush 20 cleans the bevel area A of the substrate W at the contact position lan of the cleaning surface 21 (step S6).

Thereafter, through various steps, the holding of the substrate W by the spin chuck 10 is released, and the substrate W is carried out by the transfer robot. The control unit 60 determines whether the number of substrates W cleaned at the contact positions lbn, lan of the cleaning surfaces 21, 22 has reached a predetermined number (step S8). If the number of substrates W cleaned at the contact position lbn, lan has not reached the predetermined number, the control unit 60 returns to step S3. As a result, other substrates W are cleaned.

When the number of substrates W cleaned at the contact position lbn, lan reaches a predetermined number, the control unit 60 adds 1 to the variable n (step S9). Here, the control unit 60 determines whether the variable n is larger than the number k of contact positions on each of the cleaning surfaces 21 and 22 (step S10). If the variable n is less than or equal to the number k of contact positions, the control unit 60 returns to step S3. As a result, the bevel areas A and B of the substrate W are cleaned at the next contact position lbn, lan (in this embodiment, a contact position higher than before the change) on the cleaning surfaces 21 and 22 of the cleaning brush 20. If the variable n is larger than the number k of contact positions, the control unit 60 causes the display unit 70 to display that it is time to replace the cleaning brush 20 (step S11).

(3) Effects of Embodiment According to the substrate cleaning apparatus 100 of the embodiment described above, when the number of substrates W cleaned at each contact position on the cleaning surfaces 21 and 22 reaches a predetermined determination value, the bevel The contact positions of cleaning surfaces 21 and 22 with respect to areas A and B are changed. In this case, the bevel areas A and B can be cleaned in areas of the cleaning surfaces 21 and 22 that are not contaminated or worn. Thereby, the life of the cleaning brush 20 can be improved. As a result, it becomes possible to reduce the frequency of replacing the cleaning brush 20 in the substrate cleaning apparatus 100.

Further, the contact positions of the cleaning surfaces 21 and 22 of the cleaning brush 20 with respect to the bevel areas A and B of the substrate W are changed from the bottom to the top. Thereby, even if contaminants or particles caused by wear adhere to the contact position before the change, the contaminants or particles are prevented from falling onto the substrate W that comes into contact with the contact position after the change. Therefore, it becomes possible to clean the bevel areas A and B.

The contact position of the cleaning surfaces 21 and 22 of the cleaning brush 20 with respect to the bevel areas A and B of the substrate W is changed depending on whether the number of substrates W cleaned on the cleaning surfaces 21 and 22 has reached a predetermined determination value. It is set depending on the Thereby, depending on the degree of contamination or wear of the cleaning surfaces 21, 22, the contact areas of the cleaning surfaces 21, 22 can be changed before the bevel areas A, B become insufficiently cleaned. As a result, it becomes possible to maintain the cleaning ability of the bevel regions A and B by the cleaning surfaces 21 and 22 constant over a long period of time.

(4) Other Embodiments (4-1) In the above embodiment, the bevel areas A and B of the substrate W are cleaned by the single cleaning brush 20, but the present invention is not limited thereto. FIG. 7 is a schematic side view of a substrate cleaning apparatus 100a according to another embodiment. As shown in FIG. 7, the substrate cleaning apparatus 100a further includes a cleaning brush 20a, an arm 30a, an arm drive section 40a, and a brush rotation drive section 50a. In the example of FIG. 7, the cleaning brush 20a is provided so as to face the cleaning brush 20 with the substrate W in between. The configuration of the cleaning brush 20a is similar to that of the cleaning brush 20. Like the cleaning brush 20, the cleaning brush 20a includes cleaning surfaces 21a and 22a corresponding to the slopes of the bevel regions A and B of the substrate W. Further, the operations of the cleaning brush 20a, arm 30a, arm drive unit 40a, and brush rotation drive unit 50a are the same as the operations of the cleaning brush 20, arm 30, arm drive unit 40, and brush rotation drive unit 50 of the substrate cleaning apparatus 100 in FIG. It is similar to

FIG. 8 is a diagram showing an example of cleaning the substrate W using the plurality of cleaning brushes 20, 20a. When the third predetermined condition is satisfied, the contact position of the cleaning surface 21a of the cleaning brush 20a with respect to the bevel area A of the substrate W is changed from below to above, and the fourth predetermined condition is satisfied. When it is filled, the contact position of the cleaning surface 22a of the cleaning brush 20a with respect to the second bevel region B of the substrate W is changed from below to above. The third and fourth conditions are set similarly to the first and second conditions. In this example, the third and fourth conditions are that the number of substrates W cleaned at each contact position on the cleaning surfaces 21a and 22a has reached a predetermined determination value. The third and fourth conditions may be that the cleaning time at each contact position on the cleaning surfaces 21a, 22a reaches a determination value. Furthermore, the determination values corresponding to the third and fourth conditions may be set based on the cleaning power of the cleaning surfaces 21 and 22 for the bevel areas A and B.

As shown in FIG. 8, in this example, while the bevel area B is being cleaned by the cleaning surface 22 of the cleaning brush 20, the bevel area A is being cleaned by the cleaning surface 21a of the cleaning brush 20a. Furthermore, while the bevel area A is being cleaned by the cleaning surface 21 of the cleaning brush 20, the bevel area B is being cleaned by the cleaning surface 22a of the cleaning brush 20a. Thereby, it becomes possible to clean the bevel regions A and B of the substrate W in a short time.

In the substrate cleaning apparatus 100a of FIG. 7, when the bevel area B is being cleaned by the cleaning surface 22 of the cleaning brush 20, even if the bevel area B is being auxiliary cleaned by the cleaning surface 22a of the cleaning brush 20a. Often, when the bevel area A is being cleaned by the cleaning surface 21 of the cleaning brush 20, the bevel area A may be additionally cleaned by the cleaning surface 21a of the cleaning brush 20a. Thereby, it becomes possible to improve the cleanliness of the bevel regions A and B of the substrate W in a short time.

Further, for cleaning the bevel areas A and B of the substrate W, either one of the cleaning brushes 20 and 20a may be used, and after the replacement time for either one of the cleaning brushes 20 and 20a comes, 20a may be used. This makes it possible to sufficiently reduce downtime due to replacement of the cleaning brushes 20, 20a.

(4-2) In the above embodiment, the cleaning brushes 20, 20a include the cleaning surfaces 21, 22 corresponding to the bevel areas A, B of the substrate W, but the present invention is not limited thereto. The cleaning brush 20 may have only a cleaning surface corresponding to one of the bevel areas A and B of the substrate W. Similarly, the cleaning brush 20a may have only a cleaning surface corresponding to one of the bevel areas A and B of the substrate W.

(4-3) In the above embodiment, the first and second conditions are set to be the same, but the present invention is not limited to this. The first and second conditions may be set to different conditions. Similarly, the third and fourth conditions may be set to different conditions. Furthermore, the first to fourth conditions may be set to different conditions.

(5) Correspondence between each component of the claims and each part of the embodiment Below, an example of the correspondence between each component of the claim and each element of the embodiment will be described. In the above embodiment, one of the upper surface WU and the lower surface WD of the substrate W is an example of the first main surface, and the other of the upper surface WU and the lower surface WD of the substrate W is an example of the second main surface, The spin chuck 10 is an example of a substrate rotation holding section, the cleaning brush 20 is an example of a first cleaning brush, and the arm drive section 40 is an example of a first drive section. Further, one of the cleaning surfaces 21 and 22 is an example of the first cleaning surface, the other of the cleaning surfaces 21 and 22 is an example of the second cleaning surface, and one of the cleaning surfaces 21a and 21b is an example of the first cleaning surface. This is an example of the third cleaning surface, and the other of the cleaning surfaces 21a and 21b is an example of the fourth cleaning surface. Furthermore, the cleaning brush 20a is an example of a second cleaning brush, and the arm drive section 40a is an example of a second drive section.

(6) Summary of Embodiments (Section 1) A substrate cleaning apparatus according to one aspect cleans a substrate that has a first main surface and a first bevel region at the periphery of the first main surface. A substrate cleaning device, comprising:
a substrate rotation holding unit that rotates the substrate while holding it;
a first cleaning brush having a first cleaning surface inclined so as to be able to contact the first bevel region of the substrate held by the substrate rotation holding unit;
a first contact state in which the first cleaning surface contacts the first bevel region of the substrate rotated by the substrate rotation holding unit; and a first bevel area of the substrate rotated by the substrate rotation holding unit. a first driving unit configured to move the first cleaning brush from a state to a first separated state in which the first cleaning surface is separated;
the first drive unit such that the contact position of the first cleaning surface with respect to the first bevel region in the first contact state is changed when a predetermined first condition is satisfied; and a control section that controls the.

According to the substrate cleaning apparatus described in item 1, the first cleaning brush is moved between the first contact state and the first separated state by the first driving section. In the first contact state, the first cleaning surface of the first cleaning brush contacts the first beveled area of the rotated substrate. Thereby, the first beveled area of the substrate is cleaned. Repeated cleaning of the first bevel area by the first cleaning surface may result in contamination or wear of the contact location of the first cleaning surface with respect to the first bevel area.

According to the above configuration, when the predetermined first condition is satisfied, the contact position of the first cleaning surface with respect to the first bevel region in the first contact state is changed. In this case, cleaning of the first bevel area can be carried out in areas of the cleaning surface that are free from contamination and wear. Thereby, the lifespan of the first cleaning brush can be increased, and the frequency of replacing the first cleaning brush can be reduced. As a result, downtime due to replacement of the first cleaning brush can be reduced.

(Section 2) In the substrate cleaning apparatus according to Item 1, when the first condition is satisfied, the control unit controls the cleaning surface after changing the first cleaning surface with respect to the first bevel region. The first drive unit may be controlled so that the contact position is higher than the contact position of the first cleaning surface with respect to the first bevel area before the change.

According to the substrate cleaning apparatus described in item 2, even if contaminants or particles caused by wear adhere to the contact position of the first cleaning surface before the change, the contaminants or particles will be removed from the first cleaning surface after the change. This prevents the cleaning surface from falling onto the substrate that comes into contact with the changed contact position. Thereby, after changing the contact position of the first cleaning surface, the changed contact position can be kept clean. Therefore, the first bevel region of the substrate can be cleaned.

(Section 3) In the substrate cleaning apparatus according to Item 1 or 2, the first condition may occur due to contact of the first cleaning surface with the first bevel region. The first factor associated with contamination or wear of one cleaning surface has reached a predetermined value.

According to the substrate cleaning apparatus described in item 3, the contact position of the first cleaning surface is changed based on the first factor related to contamination or wear of the first cleaning surface. Thereby, the contact area of the first cleaning surface can be changed before the first bevel area becomes insufficiently cleaned due to contamination or wear of the contact location of the first cleaning surface. Thereby, it is possible to maintain the cleaning ability of the first cleaning surface for the first bevel area.

(Section 4) In the substrate cleaning apparatus according to Item 3, the first factor includes the number of substrates cleaned by the first cleaning surface, the number of substrates cleaned by the first cleaning surface, and the number of substrates cleaned by the first cleaning surface with respect to the first bevel area. and a cleaning time of the first bevel region by the first cleaning surface.

According to the substrate cleaning apparatus described in item 4, the number of substrates cleaned by the first cleaning surface, the cleaning power of the first cleaning surface with respect to the first bevel area, or the number of substrates cleaned by the first cleaning surface, The contact position of the first cleaning surface is changed based on the cleaning time of the bevel area. Thereby, depending on the degree of contamination or wear of the first cleaning surface, the contact area of the first cleaning surface can be changed before the cleaning of the first bevel area becomes insufficient. As a result, it becomes possible to maintain the cleaning ability of the first bevel area by the first cleaning surface constant over a long period of time.

(Section 5) In the substrate cleaning apparatus according to Item 4, the cleaning power of the first cleaning surface with respect to the first bevel region is the pressing force of the first cleaning surface with respect to the first bevel region. May include.

According to the substrate cleaning apparatus described in item 5, the contact position of the cleaning surface with respect to the first bevel region can be changed based on the pressing force of the first cleaning surface with respect to the first bevel region. Thereby, the contact plate of the first cleaning surface can be changed before grooves caused by wear of the first cleaning surface reduce the cleaning performance. As a result, it becomes possible to maintain the cleaning ability of the first bevel area by the first cleaning surface constant over a longer period of time.

(Section 6) In the substrate cleaning apparatus described in Items 1 to 5,
The substrate has a second main surface opposite to the first main surface and a second bevel region at a peripheral edge of the second main surface,
The first cleaning brush has a second cleaning surface inclined so as to be able to contact the second bevel region of the substrate held by the substrate rotation holding unit,
The first driving section has a second contact state in which the second cleaning surface contacts the second bevel region of the substrate rotated by the substrate rotation and holding section, and a second contact state in which the second cleaning surface contacts the second bevel region of the substrate rotated by the substrate rotation and holding section. configured to transition the first cleaning brush to a second separated state in which the second cleaning surface is separated from the second beveled area of the substrate;
The control unit is configured to change the contact position of the second cleaning surface with respect to the second bevel region in the second contact state when a predetermined second condition is satisfied. The first drive unit may also be controlled.

According to the substrate cleaning apparatus described in item 6, the first cleaning brush is moved between the second contact state and the second separated state by the second drive unit. In the second contact state, the second cleaning surface of the first cleaning brush contacts the second beveled area of the rotated substrate. Thereby, the second beveled area of the substrate is cleaned. Repeated cleaning of the second bevel area by the second cleaning surface may result in contamination or wear of the contact location of the second cleaning surface with respect to the second bevel area.

According to the above configuration, when the predetermined second condition is satisfied, the contact position of the second cleaning surface with respect to the second bevel region in the second contact state is changed. In this case, the cleaning of the second bevel area can be carried out in areas that are free from contamination and wear of the cleaning surface. In this case, it is possible to improve the life of the first cleaning brush while cleaning the first and second bevel regions of the substrate, so that the frequency of replacing the first cleaning brush can be reduced. As a result, downtime due to replacement of the first cleaning brush can be reduced.

(Section 7) In the substrate cleaning apparatus according to Item 6,
The control unit is configured such that when the second condition is satisfied, a changed contact position of the first cleaning surface with respect to the second bevel area is the second cleaning surface with respect to the second bevel area. The first drive unit may be controlled so that the contact position is higher than the contact position before the change.

According to the substrate cleaning apparatus described in item 7, even if contaminants or particles caused by wear adhere to the contact position of the second cleaning surface before the change, the contaminants or particles will be removed from the contact position of the second cleaning surface after the change. It is prevented from falling to the contact position after changing the cleaning surface. Thereby, after changing the contact position of the twelfth cleaning surface, the changed contact position can be kept clean. Therefore, the second bevel region of the substrate can be cleaned.

(Section 8) In the substrate cleaning apparatus according to item 6 or 7,
The second condition is such that a second factor related to contamination or wear of the second cleaning surface that may occur due to contact of the second cleaning surface with the second bevel region is predetermined. It may also include that a value has been reached.

According to the substrate cleaning apparatus described in item 8, the contact position of the second cleaning surface is changed based on the second factor related to contamination or wear of the second cleaning surface. Thereby, the contact area of the second cleaning surface can be changed before the second bevel area becomes insufficiently cleaned due to contamination or wear of the contact location of the second cleaning surface. Thereby, it becomes possible to maintain the cleaning ability of the second cleaning surface for the second bevel area.

(Section 9) The substrate cleaning apparatus according to any one of Items 6 to 8,
a third cleaning surface that is inclined so as to be able to contact the first bevel area of the substrate held by the substrate rotation holder and to be able to contact the second bevel area of the substrate held by the substrate rotation holder; a second cleaning brush having an inclined fourth cleaning surface;
a third contact state in which the third cleaning surface contacts the first bevel region of the substrate rotated by the substrate rotation and holder; and a third contact state in which the third cleaning surface contacts the first bevel region of the substrate rotated by the substrate rotation and holder. to a third separated state in which the third cleaning surface is separated, and the fourth cleaning brush is applied to the second bevel region of the substrate rotated by the substrate rotation holding unit. the second cleaning brush in a fourth contact state where the surfaces are in contact with each other; and a fourth separation state in which the fourth cleaning surface is separated from the second bevel region of the substrate rotated by the substrate rotation holder. further comprising a second drive section configured to move the
The control unit is configured to change the contact position of the third cleaning surface with respect to the first bevel area in the third contact state when a predetermined third condition is satisfied, and to controlling the second drive unit so that the contact position of the fourth cleaning surface with respect to the second bevel area in the fourth contact state is changed when a fourth condition is satisfied; You can.

According to the substrate cleaning apparatus described in Item 9, the first bevel area of the substrate is cleaned by the first cleaning surface of the first cleaning brush, and the first bevel area of the substrate is cleaned by the second cleaning surface of the first cleaning brush. The second bevel area is cleaned. Further, the third cleaning surface of the second cleaning brush cleans the first bevel region of the substrate, and the fourth cleaning surface of the second cleaning brush cleans the second bevel region of the substrate.

Regarding the second cleaning brush, when a predetermined third condition is satisfied, the contact position of the third cleaning surface with respect to the first bevel area in the third contact state is changed. Moreover, when a predetermined fourth condition is satisfied, the contact position of the fourth cleaning surface with respect to the first bevel region in the fourth contact state is changed. In this case, cleaning of the first bevel area and the second bevel area can be carried out in the non-contaminated and unworn areas of the third and fourth cleaning surfaces. Thereby, the lifespan of the second cleaning brush can be improved, and the frequency of replacing the second cleaning brush can be reduced.

Moreover, after the replacement time for one of the first and second cleaning brushes has arrived, the other of the first and second cleaning brushes can be used. As a result, downtime due to replacement of the first and second cleaning brushes can be sufficiently reduced.

(Section 10) In the substrate cleaning apparatus according to Item 9, when the first cleaning surface of the first cleaning brush is in contact with the first bevel region, the control unit controls the the fourth cleaning surface of the second cleaning brush is in contact with the second bevel area, and the second cleaning surface of the first cleaning brush is in contact with the second bevel area; The first and second drives may be controlled such that the third cleaning surface of the second cleaning brush contacts the second bevel area.

According to the substrate cleaning apparatus described in Item 10, the first bevel region is cleaned by one of the first and second cleaning brushes, and the second bevel region is cleaned by one of the first and second cleaning brushes. washed by the other. Thereby, the first bevel region and the second bevel region of the substrate are cleaned in a short time. In this case as well, downtime due to replacement of the first and second cleaning brushes can be sufficiently reduced. As a result, cleaning efficiency for multiple substrates is improved.

(Section 11) In the substrate cleaning apparatus according to Item 9 or 10,
The control unit is configured such that when the first condition is satisfied, a changed contact position of the first cleaning surface with respect to the first bevel area is a contact position of the first cleaning surface with respect to the first bevel area. is higher than the contact position before the change and the second condition is satisfied, the contact position after the change of the second cleaning surface with respect to the second bevel area is the second bevel area the contact position of the third cleaning surface with respect to the first bevel region after the change, if the third condition is satisfied; is higher than the contact position before the change of the third cleaning surface with respect to the first bevel area, and the fourth condition is satisfied, the fourth cleaning with respect to the second bevel area The first and second driving units may be controlled such that the contact position after the surface change is higher than the contact position before the change of the fourth cleaning surface with respect to the second bevel region. good.

In the substrate cleaning apparatus according to item 11, even if contaminants or particles caused by wear adhere to the contact positions of the first to fourth cleaning surfaces before the change, the contaminants or particles will be removed from the contact positions after the change. It is prevented from falling to the changed contact position of the first to fourth cleaning surfaces. Thereby, after changing the contact positions of the first to fourth cleaning surfaces, the changed contact positions can be kept clean. Therefore, the first and second bevel regions of the substrate can be cleaned.

(Section 12) A substrate cleaning method according to another aspect is a substrate cleaning method for cleaning a substrate having a main surface and a bevel region at the peripheral edge of the main surface,
While one of the plurality of substrates is held and rotated by a substrate rotating and holding section, bringing an inclined cleaning surface of a cleaning brush into contact with the beveled area of the one substrate by a driving section is sequentially carried out for the plurality of substrates. step and
and controlling the drive unit so that the contact position of the cleaning surface with respect to the bevel region is changed when a predetermined condition is satisfied.

According to the substrate cleaning method described in item 12, when a predetermined condition is satisfied, the contact position of the cleaning surface with respect to the bevel region in the contact state is changed. In this case, cleaning of the bevel area can be carried out in areas that are free from contamination and wear of the cleaning surface. Thereby, the life of the cleaning brush can be extended, and the frequency of replacing the cleaning brush can be reduced. As a result, downtime due to cleaning brush replacement can be reduced.

DESCRIPTION OF SYMBOLS 10... Spin chuck, 11... Holding part, 12... Chuck rotation drive part, 13, 14... Lower surface cleaning nozzle, 15... Upper surface cleaning nozzle, 20, 20a... Cleaning brush, 21... First cleaning surface, 22... Second cleaning surface, 21a... third cleaning surface, 22a... fourth cleaning surface, 23... connection surface, 30, 30a... arm, 40, 40a... arm drive section, 50, 50a... brush rotation drive section, 60... Control unit, 70...Display unit, 100, 100a...Substrate cleaning device, A...First bevel area, B...Second bevel area, R...Bevel part, W...Substrate, WD...Bottom surface, WU...Top surface, la1 ～la3, lan...contact position, lb1～lb3, lbn...contact position

Claims (12)

A substrate cleaning apparatus for cleaning a substrate having a first main surface and a first bevel region at a peripheral edge of the first main surface,
a substrate rotation holding unit that rotates the substrate while holding it;
a first cleaning brush having a first cleaning surface inclined so as to be able to contact the first bevel region of the substrate held by the substrate rotation holding unit;
a first contact state in which the first cleaning surface contacts the first bevel region of the substrate rotated by the substrate rotation holding unit; and a first bevel area of the substrate rotated by the substrate rotation holding unit. a first driving unit configured to move the first cleaning brush from a state to a first separated state in which the first cleaning surface is separated;
the first drive unit such that the contact position of the first cleaning surface with respect to the first bevel region in the first contact state is changed when a predetermined first condition is satisfied; A substrate cleaning device comprising a control unit that controls the The control unit is configured such that when the first condition is satisfied, a changed contact position of the first cleaning surface with respect to the first bevel area is a contact position of the first cleaning surface with respect to the first bevel area. 2. The substrate cleaning apparatus according to claim 1, wherein the first drive unit is controlled so that the contact position is higher than the contact position before the change. The first condition is such that a first factor related to contamination or wear of the first cleaning surface that may occur due to contact of the first cleaning surface with the first bevel region is predetermined. 3. The substrate cleaning apparatus according to claim 1, further comprising reaching a value. The first factor includes the number of substrates cleaned by the first cleaning surface, the cleaning power of the first cleaning surface with respect to the first bevel area, and the first bevel by the first cleaning surface. 4. The substrate cleaning apparatus according to claim 3, further comprising at least one area cleaning time. 5. The substrate cleaning apparatus according to claim 4, wherein the cleaning force of the first cleaning surface with respect to the first bevel region includes a pressing force of the first cleaning surface with respect to the first bevel region. The substrate has a second main surface opposite to the first main surface and a second bevel region at a peripheral edge of the second main surface,
The first cleaning brush has a second cleaning surface inclined so as to be able to contact the second bevel region of the substrate held by the substrate rotation holding unit,
The first driving section has a second contact state in which the second cleaning surface contacts the second bevel region of the substrate rotated by the substrate rotation and holding section, and a second contact state in which the second cleaning surface contacts the second bevel region of the substrate rotated by the substrate rotation and holding section. configured to transition the first cleaning brush to a second separated state in which the second cleaning surface is separated from the second beveled area of the substrate;
The control unit is configured to change the contact position of the second cleaning surface with respect to the second bevel region in the second contact state when a predetermined second condition is satisfied. The substrate cleaning apparatus according to claim 1 or 2, wherein the first driving section is controlled. The control unit is configured such that when the second condition is satisfied, a changed contact position of the first cleaning surface with respect to the second bevel area is the second cleaning surface with respect to the second bevel area. 7. The substrate cleaning apparatus according to claim 6, wherein the first drive unit is controlled so that the contact position is higher than the contact position before the change. The second condition is such that a second factor related to contamination or wear of the second cleaning surface that may occur due to contact of the second cleaning surface with the second bevel region is predetermined. 7. The substrate cleaning apparatus according to claim 6, further comprising reaching a value. a third cleaning surface that is inclined so as to be able to contact the first bevel area of the substrate held by the substrate rotation holder and to be able to contact the second bevel area of the substrate held by the substrate rotation holder; a second cleaning brush having an inclined fourth cleaning surface;
a third contact state in which the third cleaning surface contacts the first bevel region of the substrate rotated by the substrate rotation and holder; and a third contact state in which the third cleaning surface contacts the first bevel region of the substrate rotated by the substrate rotation and holder. to a third separated state in which the third cleaning surface is separated, and the fourth cleaning brush is applied to the second bevel region of the substrate rotated by the substrate rotation holding unit. the second cleaning brush in a fourth contact state where the surfaces are in contact with each other; and a fourth separation state in which the fourth cleaning surface is separated from the second bevel region of the substrate rotated by the substrate rotation holder. further comprising a second drive section configured to move the
The control unit is configured to change the contact position of the third cleaning surface with respect to the first bevel area in the third contact state when a predetermined third condition is satisfied, and to controlling the second drive unit so that the contact position of the fourth cleaning surface with respect to the second bevel area in the fourth contact state is changed when a fourth condition is satisfied; 7. The substrate cleaning apparatus according to claim 6. The control unit is configured such that when the first cleaning surface of the first cleaning brush is in contact with the first bevel region, the fourth cleaning surface of the second cleaning brush is in contact with the second cleaning surface. when the second cleaning surface of the first cleaning brush is in contact with the second bevel area, the third cleaning surface of the second cleaning brush is in contact with the second cleaning brush. 10. The substrate cleaning apparatus according to claim 9, wherein the first and second driving parts are controlled to contact a beveled area of the substrate. The control unit is configured such that when the first condition is satisfied, a changed contact position of the first cleaning surface with respect to the first bevel area is a contact position of the first cleaning surface with respect to the first bevel area. is higher than the contact position before the change and the second condition is satisfied, the contact position after the change of the second cleaning surface with respect to the second bevel area is the second bevel area the contact position of the third cleaning surface with respect to the first bevel region after the change, if the third condition is satisfied; is higher than the contact position before the change of the third cleaning surface with respect to the first bevel area, and the fourth condition is satisfied, the fourth cleaning with respect to the second bevel area The first and second driving units are controlled so that the contact position after the surface change is higher than the contact position before the change of the fourth cleaning surface with respect to the second bevel region. Item 9. The substrate cleaning device according to item 9. A substrate cleaning method for cleaning a substrate having a main surface and a bevel region at the peripheral edge of the main surface, the method comprising:
While one of the plurality of substrates is held and rotated by a substrate rotating and holding section, bringing an inclined cleaning surface of a cleaning brush into contact with the beveled area of the one substrate by a driving section is sequentially carried out for the plurality of substrates. step and
A method for cleaning a substrate, the method comprising: controlling the drive unit so that the contact position of the cleaning surface with respect to the bevel region is changed when a predetermined condition is satisfied.

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