Substrate holding and rotation mechanism and substrate processing apparatus

A substrate holding and rotation mechanism includes: a substrate holding roller that holds a peripheral portion of the substrate and rotates the substrate, the substrate holding roller including, a lower portion of the roller facing the lower surface of the peripheral portion of the substrate, an upper portion of the roller facing the upper surface of the peripheral portion of the substrate, and a clamping groove which is provided between the lower portion of the roller and the upper portion of the roller and into which the peripheral portion of the substrate is inserted; and a roller washing nozzle that injects a fluid from diagonally above the substrate holding roller to an area including the clamp groove and an upper surface of the upper portion of the roller.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority based on Japanese Patent Application No. 2020-140614 filed in Japan on Aug. 24, 2020, the contents of which are incorporated herein by reference.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a substrate holding and rotation mechanism and a substrate processing apparatus.

Background Art

Conventionally, substrate polishing apparatuses that perform chemical mechanical polishing (CMP) to flatten the surface of a substrate, such as a silicon wafer, have been known. Such a substrate polishing apparatus includes a polishing portion that polishes the substrate and a washing portion that washes and dries the polished substrate. In the polishing portion, the residue of the slurry used for CMP and metal polishing debris adhere to the polished substrate as fine particles (foreign matters).

Japanese Patent Application, First Publication No. 2003-282516 discloses a substrate holding and rotation mechanism that holds the peripheral portion of a substrate and rotates the substrate. The substrate holding and rotation mechanism has a substrate holding portion that holds the substrate horizontally and a rotation drive mechanism that rotates the substrate holding portion. The substrate holding portion is provided with chuck pins that hold the peripheral portions of the substrate. The chuck pin has a supporting portion that supports the lower surface of the peripheral portion of the substrate and a gripping portion that grips an end surface (peripheral surface) of the peripheral portion of the substrate.

If fine particles adhere and remain on the chuck pin, they may again adhere to the substrate. For this reason, the above-mentioned substrate rotation and holding mechanism has a configuration in which a washing nozzle is provided at approximately the same height as the support portion and the gripping portion, and a washing solution is injected horizontally from the washing nozzle toward the chuck pin to wash away the fine particles attached to the chuck pin.

However, a supporting portion and a gripping portion of the chuck pins in the above-described conventional technique face the rotation center of the substrate holding portion, and the washing solution injected horizontally from outside the substrate holding portion may not efficiently remove the fine particles adhered to the supporting portion and the gripping portion.

In addition, when droplets including fine particles adhere to the upper surface of the chuck pin, which is not exposed to the washing solution, the droplets cannot be washed away and may become a source of particles that contaminate the substrate.

SUMMARY OF THE INVENTION

The present invention was made in consideration of the above-mentioned circumstances, and provides a substrate holding and rotation mechanism and a substrate processing apparatus capable of washing the entire surface of the portion holding the substrate.

A substrate holding and rotation mechanism according to one or more aspects of the present invention includes: a substrate holding roller that holds a peripheral portion of the substrate and rotates the substrate, the substrate holding roller including, a lower portion of the roller facing the lower surface of the peripheral portion of the substrate, an upper portion of the roller facing the upper surface of the peripheral portion of the substrate, and a clamping groove which is provided between the lower portion of the roller and the upper portion of the roller and into which the peripheral portion of the substrate is inserted; and a roller washing nozzle that injects a fluid from diagonally above the substrate holding roller to an area including the clamp groove and an upper surface of the upper portion of the roller.

In the substrate holding and rotation mechanism according to one or more aspects of the present invention, the roller washing nozzle may have a slit-shaped injection hole, and may be switchable between a first mode in which the injection hole is set vertical and a fluid is injected to a region including the clamp groove and the upper surface of the upper portion of the roller and a second mode in which the injection hole is set horizontal and a fluid is injected to a region including the clamp groove and without including the upper surface of the upper portion of the roller.

In the substrate holding and rotation mechanism according to one or more aspects of the present invention, a nozzle holding portion that rotatably holds the roller washing nozzle may be provided where a slit is provided on the outer surface of the roller washing nozzle, and in an outer surface of the nozzle holding portion, a first slit arranged at a same rotation angle as the slit in the first mode and a second slit arranged at a same rotation angle as the slit in the second mode are provided.

In the substrate holding and rotation mechanism according to one or more aspects of the present invention, an actuator that is connected to the roller washing nozzle and performs switching between the first mode and the second mode may be provided.

In the substrate holding and rotation mechanism according to one or more aspects of the present invention, the roller washing nozzle may be provided that includes a first roller washing nozzle that injects pure water and a second roller washing nozzle that injects a chemical solution.

In the substrate holding and rotation mechanism according to one or more aspects of the present invention, the first roller washing nozzle may inject the pure water after injecting the chemical solution from the second roller washing nozzle is stopped.

In the substrate holding and rotation mechanism according to one or more aspects of the present invention, a control device rotating the substrate holding roller while a fluid is injected from the roller washing nozzle may be provided.

In the substrate holding and rotation mechanism according to one or more aspects of the present invention, the control device may rotate the substrate holding roller at a second speed lower than the first speed at which the substrate is washed while the fluid is injected from the roller washing nozzle.

In the substrate holding and rotation mechanism according to one or more aspects of the present invention, the lower portion of the roller may extend radially outward from the upper portion of the roller, and the roller washing nozzle may injects a fluid into a region comprising the clamp groove, an upper surface of the upper portion of the roller, and an upper surface of the lower portion of the roller.

A substrate processing apparatus according to one or more aspects of the present invention includes the substrate holding and rotation mechanism according to the above-described aspects.

According to one or more aspects of the present invention described above, a substrate holding and rotation mechanism and a substrate processing apparatus capable of washing the entire portion that holds the substrate can be provided.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

First Embodiment

FIG.1is a plan view showing the overall configuration of the substrate processing apparatus1according to the first embodiment.

The substrate processing apparatus1shown inFIG.1is a chemical mechanical polishing (CMP) apparatus planarly polishing the surface of a substrate W, such as a silicon wafer. The substrate processing apparatus1includes a rectangular box-shaped housing2. The housing2is formed in substantially rectangular in plan view.

The housing2includes a substrate transfer path3extending in a longitudinal direction in the center thereof. A loading/unloading portion10is installed at one end portion of the longitudinal direction (X direction inFIG.1) of the substrate transfer path3. On one side (in this case, the upper portion of the substrate transfer path3) in the width direction (Z direction inFIG.1, a direction perpendicular to the longitudinal direction in plan view) of the substrate transfer path3, a polishing portion20is installed, and on the other side (in this case, the lower portion of the substrate transfer path3), a washing portion30is installed. A substrate transfer portion40transferring a substrate W is provided in the substrate transfer path3. The substrate processing apparatus1includes a controller (control device)50that comprehensively controls the operations of the loading/unloading portion10, the polishing portion20, the washing portion30, and the substrate transfer portion40.

The loading/unloading portion10includes front loading portions11that accommodate a substrate W. The plurality of front loading portions11are provided on a side surface of one side of the longitudinal direction of the housing2(i.e., the side surface of the loading/unloading portion10). The plurality of front loading portions11are arranged in the width direction of the housing2. In each front loading portion11, for example, an open cassette, a Standard Manufacturing Interface (SMIF) pod, or a Front Opening Unified Pod (FOUP) is mounted. The SMIF and the FOUP are shield containers in which the cassette of the substrate W is housed and covered with a partition wall, and environment independence of the external space can be maintained.

The loading/unloading portion10includes two transfer robots12that load and unload substrates W from each front loading portion11, and a traveling mechanism13that travels each transfer robot12along the line of the front loading portion11. Each transfer robot12includes two hands, one above and one below, which are used properly before and after processing the substrate W. For example, the upper hand is used to return the substrate W to the front loading portion11, and the lower hand is used to remove the substrate W before processing from the front loading portion11.

The polishing portion20includes a plurality of substrate polishing devices21(21A,21B,21C, and21D) that perform polishing (flattening) of the substrate W. The plurality of substrate polishing devices21are arranged in the longitudinal direction of the substrate transfer path3. The substrate polishing system21includes a polishing table23that rotates a polishing pad22including a polishing surface, a top ring24that holds and polishes the substrate W while pressing the substrate W against the polishing pad22on the polishing table23, a polishing fluid supply nozzle25that supplies the polishing fluid and dressing fluid (for example, pure water) to the polishing pad22, and the dresser26that performs dressing of the polishing surface of the polishing pad22, and the atomizer27that injects a mixture of fluid (for example, pure water) and gas (for example, nitrogen gas) or fluid (for example, pure water) into an atomized state onto the polishing surface.

The substrate polishing system21presses the substrate W against the polishing pad22by the top ring24while supplying the polishing fluid from the polishing fluid supply nozzle25onto the polishing pad22, and further polishes the substrate W to flatten the surface thereof by moving the top ring24and the polishing table23relative to each other. In the dresser26, hard particles such as diamond particles or ceramic particles are fixed to a rotation portion of the tip that contacts the polishing pad22, and by rotating and oscillating the rotation portion, the entire polishing surface of the polishing pad22is uniformly dressed to form a flat polishing surface.

The atomizer27purifies the polishing surface by washing away polishing debris, abrasive grains, and the like, remaining on the polishing surface of polishing pad22with a high-pressure fluid, and performs polishing surface refinement work by dresser26, which is a mechanical contact, i.e., regeneration of the polishing surface.

The washing portion30includes a plurality of substrate washing devices31(31A and31B) washing the substrate W, and a substrate drying device32drying the washed substrate W. The plurality of substrate washing devices31and substrate drying devices32are arranged in the longitudinal direction of the substrate transfer path3. A first transfer chamber33is provided between the substrate washing device31A and the substrate washing device31B. In the first transfer chamber33, a transfer robot35is provided that transfers a substrate W among the substrate transfer portion40, the substrate washing device31A, and the substrate washing device31B. In addition, a second transfer chamber34is provided between the substrate washing device31B and the substrate drying device32. In the second transfer chamber34, a transfer robot36is provided that transfers the substrate W between the substrate washing device31B and the substrate drying device32.

The substrate washing device31includes a roll sponge-type washing module, for example, to scrub and wash the substrate W. The substrate washing device31A and the substrate washing device31B may include the same or different washing modules, for example, a pencil sponge-type washing module or a two-fluid jet-type washing module. The substrate drying device32includes a drying module that performs, for example, rotagoni drying (Iso-Propyl Alcohol (IPA) drying). After drying, the shutter1aon the partition wall between the substrate drying device32and the loading/unloading portion10is opened, and the substrate W is removed from the substrate drying device32by the transfer robot12.

The substrate transfer portion40includes a lifter41, a first linear transporter42, a second linear transporter43, and a swing transporter44. In the substrate transfer path3, the first transfer position TP1, the second transfer position TP2, the third transfer position TP3, the fourth transfer position TP4, the fifth transfer position TP5, the sixth transfer position TP6, and the seventh transfer position TP7are set in order from the loading/unloading portion10.

The lifter41is a mechanism that transfers the substrate W up and down at the first transfer position TP1. The lifter41receives the substrate W from the transfer robot12of the loading/unloading portion10at the first transfer position TP1. The lifter41also receives the substrate W received from the transfer robot12and passes the substrate W to the first linear transporter42. A shutter1bis provided on the partition wall between the first transfer position TP1and the loading/unloading portion10, and when the substrate W is transferred, the shutter1bis opened and the substrate W is passed from the transfer robot12to the lifter41.

The first linear transporter42is a mechanism that transports the substrate W among the first transfer position TP1, the second transfer position TP2, the third transfer position TP3, and the fourth transfer position TP4. The first linear transporter42includes a plurality of transfer hands45(45A,45B,45C, and45D) and a linear guide mechanism46that moves each transfer hand45horizontally at a plurality of heights. The transfer hand45A moves from the first transfer position TP1to the fourth transfer position TP4by the linear guide mechanism46. The transfer hand45A is a pass hand that receives the substrate W from the lifter41and passes the substrate W to the second linear transporter43.

The transfer hand45B is moved between the first transfer position TP1and the second transfer position TP2by the linear guide mechanism46. The transfer hand45B receives the substrate W from the lifter41at the first transfer position TP1and passes the substrate W to the substrate polishing device21A at the second transfer position TP2. The transfer hand45B is provided with a lifting and lowering drive portion, and is lifted when passing the substrate W to the top ring24of the substrate polishing device21A, and is lowered after passing the substrate W to the top ring24. The same lifting and lowering drive portion is provided for the transfer hand45C and the transfer hand45D.

The transfer hand45C is moved between the first transfer position TP1and the third transfer position TP3by the linear guide mechanism46. The transfer hand45C receives the substrate W from the lifter41at the first transfer position TP1and passes the substrate W to the substrate polishing device21B at the third transfer position TP3. The transfer hand45C also functions as an access hand to receive the substrate W from the top ring24of the substrate polishing device21A at the second transfer position TP2and to pass the substrate W to the substrate polishing device21B at the third transfer position TP3.

The transfer hand45D is moved between the second transfer position TP2and the fourth transfer position TP4by the linear guide mechanism46. The transfer hand45D functions as an access hand to receive the substrate W from the top ring24of the substrate polishing device21A or the substrate polishing device21B at the second transfer position TP2or the third transfer position TP3and to pass the substrate W to the swing transporter44at the fourth transfer position TP4.

The swing transporter44includes a hand that can be transferred between the fourth transfer position TP4and the fifth transfer position TP5to receive the substrate W from the first linear transporter42to the second linear transporter43. The swing transporter44also passes the substrate W that has been polished in the polishing portion20to the washing portion30. A temporary storage table47for the substrate W is provided at the side in the X-axis direction of the swing transporter44. The swing transporter44reverses the substrate W received at the fourth transfer position TP4or the fifth transfer position TP5upside down and places the substrate W on the temporary placement table47. The substrate W placed on the temporary storage table47is transported to the first transport chamber33by the transport robot35of the washing portion30.

The second linear transporter43is a mechanism transporting the substrate W among the fifth transport position TP5, the sixth transport position TP6, and the seventh transport position TP7. The second linear transporter43includes a plurality of transfer hands48(48A,48B, and48C) and a linear guide mechanism49that transfers each transfer hand45horizontally at a plurality of heights. The transfer hand48A is moved from the fifth transfer position TP5to the sixth transfer position TP6by the linear guide mechanism49. The transfer hand45A functions as an access hand that receives the substrate W from the swing transporter44and passes the substrate W to the substrate polishing device21C.

The transfer hand48B is moved between the sixth transfer position TP6and the seventh transfer position TP7. The transfer hand48B functions as an access hand that receives the substrate W from the substrate polishing device21C and passes the substrate W to the substrate polishing device21D. The transfer hand48C moves between the seventh transfer position TP7and the fifth transfer position TP5. The transfer hand48C functions as an access hand to receive the substrate W from the top ring24of the substrate polishing device21C or the substrate polishing device21D at the sixth transfer position TP6or the seventh transfer position TP7, and to pass the substrate W to the swing transporter44at the fifth transfer position TP5. Although the description is omitted, the operation of the transfer hand48when receiving and passing the substrate W is the same as the operation of the first linear transporter42described above.

FIG.2is a side view showing the configuration of the substrate washing device31according to the first embodiment.FIG.3is a perspective view showing the substrate holding and rotation mechanism70according to the first embodiment.FIG.4is a system diagram showing the piping system110connected to the roller washing nozzle80according to the first embodiment.FIG.5is an enlarged perspective view of the main portion of the substrate holding and rotation mechanism70according to the first embodiment.

As shown inFIG.2, the substrate washing device31includes a roll washing member60scrubbing the substrate W, and a substrate holding and rotation mechanism70holding and rotating the substrate W.

The surface of the roll washing member60is formed, for example, from a polyvinyl alcohol (PVA) sponge or a urethane sponge. The roll washing member60includes an upper roll washing member60A that contacts the upper surface (polishing surface) W1of the substrate W, and a lower roll washing member60B that contacts the lower surface W2of the substrate W.

The upper roll washing member60A and the lower roll washing member60B are connected to an electric drive portion such as a motor to rotate. The upper roll washing member60A can be moved up and down by an air drive portion (actuator) such as an air cylinder, which is not shown in the drawings. The lower roll washing member60B may be held at a certain height.

The substrate holding and rotation mechanism70is provided with a plurality of substrate holding rollers71(four in the present embodiment) that hold the peripheral portion W3of the substrate W and rotate the substrate W. The substrate holding rollers71include a roller lower portion71afacing the lower surface W2of the peripheral portion W3of the substrate W, a roller upper portion71bfacing the upper surface W1of the peripheral portion W3of the substrate W, and a clamping groove71cprovided between the roller lower portion71aand the roller upper portion71binto which the peripheral portion W3of the substrate W is inserted.

The substrate holding roller71is provided at the upper end of each of the four pillar portions72, as shown inFIG.3. The substrate holding rollers71are configured to be horizontally rotatable by an electric drive portion such as a motor, which is not shown in the drawings, installed in the pillar portion72. The substrate holding rollers71are configured to be able to move up and down by an air drive portion such as an air cylinder, which is not shown in the drawings, installed in the pillar portion72.

When setting the substrate W as shown inFIG.2, first, the upper roll washing member60A and the plurality of substrate holding rollers71are raised. Next, the substrate W is held in a horizontal position by the plurality of substrate holding rollers71that have been raised, and then lowered until the lower surface W2of the substrate W contacts the lower roll washing member60B. Finally, the upper roll washing member60A is lowered to contact the upper surface W1of the substrate W.

After the substrate W is set in such a manner, the foreign matters (fine particles) adhered to the upper surface W1and the lower surface W2of the substrate W are removed by rotating the pair of roll washing members60while the substrate W is rotated by the substrate holding roller71. In the case of wet washing, a chemical solution and/or pure water is supplied from a nozzle not shown in the drawings toward the upper surface W1of the substrate W, and the substrate W is scrubbed by the pair of roll washing members60. As the chemical solution, SC1(ammonia/hydrogen peroxide mixed solution) or the like can be used.

The substrate holding and rotation mechanism70includes roller washing nozzles80that wash away the fine particles adhered to the substrate holding rollers71after washing the substrate W as described above. The washing of the substrate holding roller71is performed, for example, after the washing of one lot of substrate W is completed and before the washing of the next lot of substrate W. The washing of the substrate holding roller71may be performed every time one substrate W is washed, or during a dummy dispensing of the substrate washing system31(periodically discharging the chemical solution and/or pure water accumulated in the piping system for washing the substrate W).

The roller washing nozzle80injects fluid from diagonally above the substrate holding roller71toward the substrate holding roller71, as shown inFIG.5. The roller washing nozzle80is held by the nozzle holding portion90. The nozzle holding portion90is held by a holder100attached to the pillar portion72. The holder100includes a horizontal portion101extending horizontally from the pillar portion72and a standing portion102rising from the horizontal portion101.

The horizontal portion101is screwed to a flange73provided near an upper end portion of the pillar portion72via a bolt103. The standing portion102rises from the horizontal portion101and holds the nozzle holding portion90at the upper end portion thereof. A piping system110that supplies pure water (DIW) to the roller washing nozzle80is connected to the nozzle holding portion90.

As shown inFIG.4, the piping system110is branched into four branches each corresponding to the four substrate holding rollers71. In particular, the piping system110includes the valve device111that controls the supply/stop of pure water and the flow rate under appropriate injection conditions, the main pipe112provided with the valve device111, the first branch pipe113branched into two branches from the main pipe112, and the second branch pipe114further branched into two branches from each first branch pipe113.

The second branch pipe114is connected to the nozzle holding portion90as shown inFIG.5. The pure water supplied from the second branch pipe114passes through the inside of the nozzle holding portion90and is injected from the injection hole81of the roller washing nozzle80toward the substrate holding roller71. The piping system110of the present embodiment is provided as a system different from the piping system for washing the substrate W described above. However, the piping system110for washing the substrate holding roller71may be formed by branching from the piping system washing the substrate W. In addition, the piping system110washing the substrate holding roller71may be formed by branching from the piping system for dummy dispensing. In these cases, the substrate holding roller71is washed when the substrate W is not washed.

As shown inFIG.5, the roller washing nozzle80includes a slit-shaped injection hole81. The injection hole81extends vertically and is configured to inject a fluid (pure water) in a fan shape. The roller washing nozzle80is configured to inject a fluid into a region of the substrate holding roller71including the clamp groove71cand the upper surface71b1of the roller upper portion71b. The upper surface71b1of the roller upper portion71bhas a flat surface.

The fluid injected from the roller washing nozzle80washes away the fine particles adhered to the clamp groove71cof the substrate holding roller71, and also washes away the fine particles adhered to the upper surface71b1of the roller upper portion71b. In addition, since the fluid that has flowed down from the upper surface71b1of the roller upper portion71band the clamp groove71calso washes away the fine particles adhered to the roller lower portion71a, the portion of the substrate holding roller71that holds the substrate W can be entirely washed. The lower roller portion71aextends radially outward from the roller upper portion71b, and the upper surface71a1is a tapered surface that extends downward in the radial direction.

As shown inFIG.5, the roller washing nozzle80injects fluid into a region including not only the clamp groove71cand the upper surface71b1of the roller upper portion71bbut also the upper surface71a1of the roller lower portion71a. As a result, the fine particles adhered to the upper surface71a1of the lower roller71acan also be washed away by the water pressure of the fluid.

In addition, the controller50(seeFIG.1) rotates the substrate holding roller71while the fluid is injected from the roller washing nozzle80as described above. As a result, the fluid can be injected on the entire circumference of the substrate holding roller71. At this time, the controller50rotates the substrate holding roller71at a second speed (for example, approximately ½ to ¼) lower than the first speed when washing the substrate W. As a result, the time required for the fluid to be applied per unit area of the substrate holding roller71becomes long, so that the fine particles fall off well. Although the controller50controls the overall operation of the substrate processing apparatus1, a dedicated controller may be provided for the substrate holding and rotation mechanism70.

As described above, according to the substrate holding and rotation mechanism70of the present embodiment described above, a configuration is employed such that the substrate holding and rotation mechanism70includes a substrate holding roller71that holds a peripheral portion W3of the substrate W and rotates the substrate W, the substrate holding roller71including, a lower portion71aof the roller facing the lower surface W2of the peripheral portion W3of the substrate W, an upper portion71bof the roller facing the upper surface W1of the peripheral portion W3of the substrate W, and a clamping groove71cwhich is provided between the lower portion71aof the roller and the upper portion71bof the roller and into which the peripheral portion W3of the substrate W is inserted; and a roller washing nozzle80that injects a fluid from diagonally above the substrate holding roller71to an area including the clamp groove71cand the upper surface71b1of the upper portion71bof the roller. As a result, the portion of the substrate holding roller71that holds the substrate W can be entirely washed, and it can be prevented fine particles from again adhering to the substrate W.

Second Embodiment

Next, the second embodiment of the present invention will be described. In the following description, the same or equivalent configurations as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be simplified or omitted.

FIG.6is an enlarged perspective view showing a main portion of the substrate holding and rotation mechanism70according to the second embodiment.

As shown inFIG.6, the nozzle holding portion90of the second embodiment rotatably holds the roller washing nozzle80. The roller washing nozzle80is rotatable around the central axis O passing through the center of the injection hole81.

Similar to the above-described embodiment, such the roller washing nozzle80has a first mode (seeFIG.5) in which the injection hole81is set vertical and the fluid is injected into a region including the clamp groove71cand the upper surface71b1of the roller upper portion71band a second mode (seeFIG.6) in which the injection hole81is set horizontal and the fluid is injected into a region including the clamp groove71cand without including the upper surface71b1of the roller upper portion71b, and the two injection modes are switchable.

According to the first mode, as described above, the portion of the substrate holding roller71that holds the substrate W can be entirely washed. In addition, according to the second mode, in the substrate holding roller71, the clamp groove71cin which fine particles are particularly likely to remain can be intensively washed. By switching between the first mode and the second mode in such a manner, the fine particles adhered to the substrate holding roller71can be efficiently washed.

FIG.7is a perspective view showing a configuration that facilitates rotation angle adjustment (mode switching) of the roller washing nozzle80according to the second embodiment.FIG.8is a perspective view showing a state of the rotation angle adjustment operation of the roller washing nozzle80according to the second embodiment.FIG.9is a perspective view showing a jig200used in the rotation angle adjustment operation of the roller washing nozzle80according to the second embodiment.

As shown inFIG.7, on the outer surface of the nozzle holding portion90of the second embodiment, a first slit91for switching the roller washing nozzle80to the first mode and a second slit92for switching the roller washing nozzle80to the second mode are preferably formed.

A slit82as a mark is provided on the outer surface of the roller washing nozzle80. The slit82is provided on an extension line in the longitudinal direction (extending direction of the slit) of the injection hole81. The first slit91of the nozzle holding portion90is provided on the upper surface of the nozzle holding portion90so that the roller washing nozzle80is arranged at the same rotation angle as the slit82when the roller washing nozzle80is in the first mode. In addition, the second slit92of the nozzle holding portion90is provided on the side surface of the nozzle holding portion90so that the roller washing nozzle80is arranged at the same rotation angle as the slit82when the roller washing nozzle80is in the second mode.

When adjusting the rotation angle of the roller washing nozzle80(mode switching), a plate-shaped jig200can be inserted as shown inFIG.8. The jig200includes a first insertion portion201that can be inserted into the slit82of the roller washing nozzle80, and a second insertion portion202that can be inserted into the first slit91or the second slit92of the nozzle holding portion90. As shown inFIG.9, the first insertion portion201is thinner than the second insertion portion202and protrudes more than the second insertion portion202(end surface of the jig200).

For example, when switching the roller washing nozzle80to the second mode, as shown inFIG.8, the first insertion portion201of the jig200is inserted into the slit82of the roller washing nozzle80, and the second insertion portion202of the jig200is inserted into the second slit92of the nozzle holding portion90. As a result, the injection mode of the roller washing nozzle80can be switched to the second mode. By inserting the jig200, the slit82of the roller washing nozzle80and the second slit92of the nozzle holding portion90can be easily aligned on a straight line, and thus, the desired washing performance by the second mode can be obtained.

Third Embodiment

Next, a third embodiment of the present invention will be described. In the following description, the same or equivalent configurations as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be simplified or omitted.

FIG.10is a plan view showing a main portion of the substrate holding and rotation mechanism70according to the third embodiment.FIG.11is a system diagram showing piping systems110and120connected to the first roller washing nozzle80A and the second roller washing nozzle80B according to the third embodiment.

As shown inFIG.10, in the third embodiment, the roller washing nozzle80includes a first roller washing nozzle80A injecting pure water and a second roller washing nozzle80B injecting a chemical solution. As the chemical solution to be injected from the second roller washing nozzle80B, SC1(ammonia/hydrogen peroxide mixed aqueous solution) or the like can be used in the same manner as the chemical solution for washing the substrate W.

The first roller washing nozzle80A and the second roller washing nozzle80B are configured to inject fluid from diagonally above the substrate holding roller71into a region including the clamp groove71cand the upper surface71b1of the roller upper portion71b, respectively. The piping system110for supplying the above-mentioned pure water is connected to the first roller washing nozzle80A. In addition, a piping system120for supplying a chemical solution is connected to the second roller washing nozzle80B.

As shown inFIG.11, the piping system120for supplying the chemical solution is also branched into four branches corresponding to the four substrate holding rollers71, similarly to the piping system110for supplying pure water. In particular, the piping system120includes the valve device121that controls the supply/stop of the chemical solution and the flow rate under appropriate injection conditions, the main pipe122provided with the valve device121, the first branch pipe123branched into two branches from the main pipe122, and the second branch pipe124further branched into two branches from each first branch pipe123.

As shown inFIG.10, the second branch pipe124is connected to the nozzle holding portion90of the second roller washing nozzle80B. The chemical solution supplied from the second branch pipe124passes through the inside of the nozzle holding portion90of the second roller washing nozzle80B, and is injected from the injection hole81of the second roller washing nozzle80B toward the substrate holding roller71. The piping system120of the present embodiment is provided as a system different from the piping system of the chemical solution for washing the substrate W described above. However, the piping system120for washing the substrate holding roller71may be formed by branching from the piping system for the chemical solution for washing the substrate W. In addition, the piping system120for washing the substrate holding roller71may be formed by branching from the piping system for dummy dispensing. In these cases, the substrate holding roller71is washed when the substrate W is not washed.

According to the above configuration, the fluid to be injected to the substrate holding roller71can be switched between pure water and a chemical solution for washing. For example, pure water may be injected from the first roller washing nozzle80A after the injection of the chemical solution from the second roller washing nozzle80B is stopped. This makes it possible to rinse the substrate holding roller71washed with the chemical solution with pure water. By switching the fluid in the order of the chemical solution and the pure water in such a manner, the fine particles adhered to the substrate holding roller71can be removed by the chemical solution, and the chemical solution adhered to the substrate holding roller71can be washed away with pure water. The chemical solution and pure water may be injected at the same time; however, since the chemical solution is diluted with pure water, it is preferable to inject them individually.

FIG.12is a plan view showing a modification example of the substrate holding and rotation mechanism70according to the third embodiment.

In the third embodiment, as shown inFIG.12, the first roller washing nozzle80A may be set to the first mode, and the second roller washing nozzle80B may be set to the second mode. According to such a configuration, the clamp groove71cin which fine particles are particularly likely to remain in the substrate holding roller71can be intensively washed away with chemical solution, and the substrate holding roller71can be entirely washed away with pure water. In this case as well, it is preferable to rinse the substrate holding roller71with pure water after washing with the chemical solution as described above.

Fourth Embodiment

Next, a fourth embodiment of the present invention will be described. In the following description, the same or equivalent configurations as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be simplified or omitted.

FIG.13is a side view showing the configuration of the substrate holding and rotation mechanism70according to the fourth embodiment.

As shown inFIG.13, in the fourth embodiment, an actuator130is provided that is connected to the roller washing nozzle80and switches between the first mode and the second mode described above. The actuator130includes, for example, an electric drive portion such as a motor and a speed reducer such as a worm gear, and automatically adjusts the rotation angle of the roller washing nozzle80.

According to the above-described configuration, as shown inFIG.12described above, one roller washing nozzle80can switch between washing by the first mode and washing by the second mode without providing two roller washing nozzles80. In addition, if the piping system120for the chemical solution is connected to the nozzle holding portion90in addition to the piping system110for pure water, it is possible to switch between the chemical solution and pure water from the same roller washing nozzle80. For example, it is possible to inject a chemical solution in the second mode to wash the clamp groove71c, then to switch to the first mode and rinse the entire surface of the substrate holding roller71with pure water.

Although the preferred embodiments of the present invention have been described, it should be understood that these are exemplary of the present invention and should not be considered as limitation. Additions, omissions, substitutions, and other modifications can be made without departing from the scope of the invention. Therefore, the present invention should not be considered limited by the above description, but is limited by the claims.

For example, the above-described embodiment illustrates a CMP apparatus as a substrate processing apparatus to which the substrate holding and rotation mechanism of the present invention is applied; however, it may be applied to apparatuses other than a CMP apparatus (for example, a back grinding device, a bevel polishing device, an etching device, or a plating device).