WO2023140155A1 - 塗布膜形成装置、塗布膜形成方法及び記憶媒体 - Google Patents
塗布膜形成装置、塗布膜形成方法及び記憶媒体 Download PDFInfo
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- WO2023140155A1 WO2023140155A1 PCT/JP2023/000457 JP2023000457W WO2023140155A1 WO 2023140155 A1 WO2023140155 A1 WO 2023140155A1 JP 2023000457 W JP2023000457 W JP 2023000457W WO 2023140155 A1 WO2023140155 A1 WO 2023140155A1
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- coating film
- substrate
- gas
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- coating liquid
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- 239000011248 coating agent Substances 0.000 title claims abstract description 279
- 238000000576 coating method Methods 0.000 title claims abstract description 279
- 238000000034 method Methods 0.000 title claims description 9
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- 230000015572 biosynthetic process Effects 0.000 title abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 144
- 230000002093 peripheral effect Effects 0.000 claims abstract description 71
- 239000000758 substrate Substances 0.000 claims abstract description 44
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 35
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- 238000007493 shaping process Methods 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims 2
- 235000012431 wafers Nutrition 0.000 description 178
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- 238000012360 testing method Methods 0.000 description 97
- 238000011156 evaluation Methods 0.000 description 87
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- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/06—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with a blast of gas or vapour
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/08—Spreading liquid or other fluent material by manipulating the work, e.g. tilting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
Definitions
- the present disclosure relates to a coating film forming apparatus, a coating film forming method, and a storage medium.
- Patent Literature 1 describes forming a coating film on the peripheral edge of a rotating wafer by moving a nozzle so that the position to which the processing liquid (coating liquid) is supplied moves between the outer periphery and the peripheral edge of the wafer.
- the present disclosure provides a technique capable of suppressing swelling of the inner peripheral end of the coating film when forming the annular coating film along the circumference of the substrate on the peripheral edge of the substrate.
- a coating film forming apparatus of the present disclosure includes a rotation holding unit that holds and rotates a substrate, a coating liquid nozzle that discharges a coating liquid to a first position on the periphery of the rotating substrate to form an annular coating film along the circumference of the substrate; a gas nozzle provided for discharging a gas to a second position on the rotating substrate closer to the rotation center of the substrate than the first position and downstream in the rotation direction of the substrate, and for shaping the coating film by the flow of the gas from the second position toward the peripheral edge of the substrate; Prepare.
- FIG. 1 is a longitudinal side view of a coating film forming apparatus according to an embodiment of the present disclosure
- FIG. 2 is a cross-sectional plan view of the coating film forming apparatus
- FIG. 3 is a plan view showing gas nozzles and coating liquid nozzles provided in the coating film forming apparatus
- FIG. It is a side view which shows the said gas nozzle
- 3 is a plan view showing gas nozzles and coating liquid nozzles provided in the coating film forming apparatus
- FIG. It is a side view which shows operation
- It is a side view which shows operation
- It is a side view which shows operation
- It is a side view which shows operation
- FIG. 4 is a plan view showing another configuration example of the coating film forming apparatus; It is explanatory drawing which shows the process in the said another structural example.
- FIG. 5 is a longitudinal side view showing another configuration example of the gas nozzle; 4 is a plan view of a wafer for explaining the positional relationship between the gas nozzle and the wafer; FIG. FIG.
- 11 is a plan view showing a configuration example of still another gas nozzle; It is a longitudinal side view of the said gas nozzle. It is a graph chart which shows the result of an evaluation test. It is a graph chart which shows the result of an evaluation test. It is a graph chart which shows the result of an evaluation test. It is a graph chart which shows the result of an evaluation test. It is a graph chart which shows the result of an evaluation test. It is a graph chart which shows the result of an evaluation test.
- a coating film forming apparatus 1 according to an embodiment of the present disclosure will be described with reference to the vertical cross-sectional side view of FIG. 1 and the cross-sectional plan view of FIG.
- This coating film forming apparatus 1 rotates a wafer W, which is a circular substrate, and discharges a coating liquid from a nozzle onto the peripheral edge portion of the surface of the wafer W. As shown in FIG. The coating liquid flows from the discharged position toward the peripheral edge of the wafer W, thereby forming an annular coating film M along the periphery of the wafer W. As shown in FIG.
- the coating film forming apparatus 1 supplies the wafer W with a gas for preventing the formation of the hump M1, which is a protrusion at the inner peripheral end of the coating film M, which will be described in detail later.
- the diameter of the wafer W is 300 mm, and the gas supplied to the wafer W is air.
- the coating film forming apparatus 1 includes a spin chuck 11 , a rotating mechanism 12 , pins 13 , an elevating mechanism 14 , a guide ring 15 and a cup 21 .
- the spin chuck 11 is connected to a rotating mechanism 12 including a motor.
- the rotation mechanism 12 rotates the spin chuck 11 vertically at a rotation speed according to a control signal output from the control unit 10, which will be described later.
- the center P of the wafer W is placed on the spin chuck 11 so as to be aligned with the rotation center of the spin chuck 11 in plan view, so the center P is also the rotation center of the wafer W.
- FIG. The rotation direction of the wafer W is clockwise in plan view.
- Three pins 13 for supporting the wafer W are provided so as to surround the spin chuck 11 in plan view (only two pins are shown in FIG. 1), and can be moved up and down by a lifting mechanism 14 .
- the wafer W is transferred between the transfer mechanism (not shown) for the wafer W and the spin chuck 11 by the pins 13 .
- a guide ring 15 having a chevron-shaped longitudinal section is provided on the lower side of the spin chuck 11, and the outer peripheral edge of the guide ring 15 is bent and extends downward.
- the guide ring 15 serves to guide the liquid spilled from the wafer W to the bottom of the cup 21 .
- the cup 21 is circular, surrounds the guide ring 15, the spin chuck 11, and the wafer W placed on the spin chuck 11, and is provided to prevent the coating liquid from scattering.
- the upper side of the cup 21 is open so that the wafer W can be transferred.
- a gap 22 is formed between the side peripheral surface of the cup 21 and the outer peripheral edge of the guide ring 15 to form a liquid and gas discharge path.
- An upright exhaust pipe 23 is provided on the lower side of the cup 21 and an exhaust port 24 is opened at the upper end of the exhaust pipe 23 .
- the inside of the cup 21 is constantly evacuated through the exhaust port 24 while the wafer W is being processed.
- a drain port 25 is opened at the bottom of the cup 21 .
- the coating film forming apparatus 1 also includes a guide 31 , a moving mechanism 32 , a support 33 , a coating liquid nozzle 41 and a gas nozzle 42 .
- the guide 31 is provided on the rear side with respect to the cup 21 so as to extend horizontally from side to side.
- the moving mechanism 32 is movable along the extending direction of the guide 31 .
- the support 33 has an arm portion 34 extending forward from the moving mechanism 32 and a sub-arm portion 35 connected to the arm portion 34 , and is raised and lowered by the moving mechanism 32 .
- the left side and the right side in the following description are assumed to be the left side and the right side when viewed from the rear to the front.
- the arm portion 34 and the sub-arm portion 35 are branched while extending forward to form the sub-arm portion 35, and the sub-arm portion 35 extends leftward.
- a coating liquid nozzle 41 and a gas nozzle 42 are provided at the tip of the arm portion 34 and the tip of the sub-arm portion 35, respectively. Therefore, the coating liquid nozzle 41 and the gas nozzle 42 are connected to a moving mechanism 32 common to these nozzles 41 and 42 via a support 33, and the moving mechanism 32 can horizontally move left and right and move up and down.
- the coating liquid nozzle 41 and the gas nozzle 42 are configured to be movable between a standby position outside the cup 21 (that is, outside the wafer W placed in the cup 21) in plan view and a processing position above the peripheral edge of the wafer W.
- 2 shows a state in which the coating liquid nozzle 41 and the gas nozzle 42 are positioned at the standby position
- a plan view of FIG. 3 shows a state in which the coating liquid nozzle 41 and the gas nozzle 42 are positioned at the processing position.
- the coating liquid nozzle 41 and the gas nozzle 42 eject the coating liquid and air toward the peripheral portion of the wafer W, respectively.
- the standby position and processing position of the coating liquid nozzle 41 are the first standby position and first processing position, respectively
- the standby position and processing position of the gas nozzle 42 are the second standby position and second processing position, respectively.
- the coating liquid nozzle 41 is configured, for example, as a cylindrical body having an outer peripheral wall that tapers toward the tip side, and has a circular discharge port on the tip surface thereof.
- the coating liquid nozzle 41 is connected to the coating liquid supply section 41A via a pipe.
- the coating liquid supply unit 41A includes a valve, a storage section in which the coating liquid is stored, a pump, and the like, and pressure-feeds the coating liquid from the storage section toward the coating liquid nozzle 41 and discharges it from the coating liquid nozzle 41 .
- the orientation of the coating liquid nozzle 41 will be described.
- the coating liquid nozzle 41 discharges the coating liquid downward from the center side of the wafer W toward the peripheral edge side. That is, the coating liquid is discharged obliquely with respect to the vertical and horizontal surfaces.
- the direction of rotation of the wafer W is indicated by an arrow.
- the coating liquid nozzle 41 discharges the coating liquid in a direction following the rotation direction of the wafer W in plan view. By discharging the coating liquid in such a manner, the coating liquid is prevented from being repelled by the wafer W and scattering, and the uniformity of the thickness of the coating film is improved. It should be noted that following the rotation direction will be described more specifically when the gas nozzle 42 is described.
- the projection area R1 is the area projected onto the wafer W by extending the ejection port of the coating liquid nozzle 41 at the processing position in the ejection direction of the coating liquid, and P1 is the center of the projection area R1.
- the projection region R1 corresponds to the first position on the wafer W where the coating liquid is discharged. Also, the direction in which the coating liquid is ejected from the coating liquid nozzle 41 is indicated by a dashed line as D1 in the drawing. Since this dashed line is represented as a straight line passing through the center of the ejection port of the coating liquid nozzle 41, it is drawn so as to pass through the center P1 of the projection region R1.
- the hump M1 which is the protrusion of the coating film M described above, will be described with reference to FIG.
- Most of the coating liquid discharged toward the projection region R1 flows toward the peripheral edge of the wafer W due to the fact that the coating liquid is discharged from the center side toward the peripheral side and the centrifugal force of the wafer W.
- part of the coating liquid moves from the projection area R1 to a position near the center P of the wafer W outside the projection area R1 due to the pressure applied when it collides with the wafer W.
- the coating liquid is less supplied than in the area extending from the projection region R1 to the peripheral edge of the wafer W, and the flow of the coating liquid slows down, so the drying of the coating liquid progresses relatively quickly.
- the above-described hump M1 may be formed at the position. From a different point of view, it can be said that drying of the coating liquid progresses quickly in the hump M1. Since the hump M1 is formed as described above, the hump M1 has an annular shape along the circumference of the wafer W, for example.
- the gas nozzle 42 is configured to discharge the air so as to form an air flow from the inner peripheral end of the coating film M toward the outer edge (that is, the peripheral end of the wafer W), and the wind pressure of the air can break the humps M1 before solidification and push the coating liquid forming the humps M1 toward the outer edge side of the coating film M.
- the gas nozzle 42 shapes the coating film M so that the hump M1 is removed.
- the period during which air is discharged from the gas nozzle 42 is set so as to overlap the period during which the coating liquid is discharged from the coating liquid nozzle 41.
- the gas nozzle 42 will be described below.
- the gas nozzle 42 is configured, for example, as a cylindrical body having an outer peripheral wall that tapers toward the tip side, and a circular discharge port 43 is opened on the tip surface of the gas nozzle 42 .
- the gas nozzle 42 is also connected to a gas supply section 42A via a pipe.
- the gas supply unit 42A includes a valve, a flow control mechanism, an air supply source, and the like. By opening and closing the valve, the supply of air from the air supply source to the gas nozzle 42 is stopped.
- the flow rate of air supplied to the gas nozzle 42 (that is, the flow rate of air discharged from the gas nozzle 42) is adjusted to a predetermined flow rate by the flow rate adjustment mechanism.
- the temperature of the air supplied from the gas supply section 42A to the gas nozzle 42 is, for example, 16.degree. C. to 24.degree.
- FIG. 1 The arrangement of the gas nozzles 42 at the processing position will be described below with reference to FIGS. 3 and 4.
- FIG. the gas nozzle 42 is provided to apply the wind pressure toward the peripheral edge of the wafer W to the inner peripheral edge of the coating film M.
- the gas nozzle 42 discharges air downward from the center side of the wafer W toward the peripheral edge side so that the action can be reliably performed. That is, the air is discharged obliquely with respect to the vertical and horizontal planes.
- a projection region R2 is a region obtained by extending the ejection port of the gas nozzle 42 at the processing position and projected onto the wafer W in the gas ejection direction
- P2 is the center of the projection region R2. Note that the projection region R2 corresponds to the second position on the wafer W where the gas is discharged.
- FIG. 4 shows an angle between the gas ejection direction D2 and the surface of the wafer W as viewed from the side as a nozzle angle ⁇ in the side view. Since the wafer W is mounted on the spin chuck 11 so that the surface is horizontal, the side view nozzle angle ⁇ is also the angle between the horizontal plane and the gas discharge direction D2.
- the force for pressing the hump M1 toward the peripheral edge of the wafer W can be increased as the side view nozzle angle ⁇ decreases.
- the side view nozzle angle ⁇ is preferably 20° or more as described above.
- the side view nozzle angle ⁇ is preferably 20° to 60°, more preferably 30° to 60°.
- the distance between the center P2 of the projection region R2 of the gas nozzle 42 and the inner peripheral edge of the coating film M in the air ejection direction in a plan view is defined as a film separation distance L1.
- the film separation distance L1 is preferably as small as possible.
- the film separation distance L1 is preferably 0 mm or more and less than 5 mm, more preferably 0 mm to 3 mm.
- the solid line indicates the gas nozzle 42 when the processing position is set such that the film separation distance L1 is 0 mm
- the two-dot chain line indicates the gas nozzle 42 when the processing position is set such that the film separation distance L1 is greater than 0 mm.
- the position of the inner peripheral end of the coating film M on the wafer W may be detected by, for example, conducting a test in advance, and the position of the projection region R2 of the gas nozzle 42 may be set from the position of the inner peripheral end and the film separation distance L1. Due to the spread of the coating liquid discharged from the coating liquid nozzle 41 onto the projection area R1, for example, the inner peripheral end of the coating film M may be located slightly closer to the center P of the wafer W than the projection area R1 (see FIG. 3).
- the projection region R2 when comparing the position of the center P1 of the projection region R1 and the position of the center P2 of the projection region R2 in the radial direction of the wafer W, the projection region R2 is located closer to the center P of the wafer W even if the film separation distance L1 is 0 mm.
- the projection region R2 is downstream in the rotational direction when viewed in the rotational direction of the wafer W with the projection region R1 as the base point
- the projection region R1 is downstream in the rotational direction when viewed in the rotational direction of the wafer W with the projection region R2 as the base point.
- the positional relationship between the projection regions R1 and R2 differs depending on the difference in the base point, the length of the arc region between the projection regions R1 and R2 is compared, and the projection region R1 is used as the base point based on the comparison result.
- the positional relationship is such that the projection area R2 is positioned on the downstream side in the rotational direction with respect to the projection area R1.
- the projection areas R1 and R2 are closer. However, the air ejected onto the projection area R2 spreads over the surface of the wafer W due to the impact caused by the collision with the projection area R2. If the distance between the projection regions R1 and R2 is too small, the liquid flow of the coating liquid discharged from the coating liquid nozzle 41 may be fanned by the air diffusing on the surface of the wafer W, and the uniformity of the thickness of the coating film M may deteriorate.
- the separation distance L2 between the projection regions R1 and R2 in the rotation direction of the wafer W is an appropriate value, specifically, 30 mm to 100 mm, for example.
- the gas discharge direction D2 from the gas nozzle 42 in plan view follows the rotation direction of the wafer W, that is, the direction that does not oppose the rotation of the wafer W.
- the center P2 of the projection region R2 where the air is ejected undergoes uniform circular motion as the wafer W rotates.
- the angle ⁇ 3 formed by the velocity vector V1 with the center P2 as a base point in plan view and the gas ejection direction D2 is an obtuse angle
- the gas is ejected following the rotation direction of the wafer W (see FIG. 5).
- the ejection direction D2 follows the rotation direction of the wafer W in this way, it is possible to prevent the air ejected onto the projection region R2 from being repelled by the rotation of the wafer W and scattering around, disturbing the liquid flow supplied to the wafer W and flowing to the peripheral edge of the wafer W, thereby improving the uniformity of the film thickness of the coating film M.
- a virtual circle C2 passing through the center P2 of the projection area R2 of the gas nozzle 42 and having the center P of the wafer W as its center is set.
- This circle C2 is a trajectory drawn by the center P2 of the projection area R2 as the wafer W rotates.
- the plane gas ejection angle ⁇ 2 is defined as the angle formed by the tangent line T2 in plan view and the gas ejection direction D2, and the plane gas ejection angle ⁇ 2 is, for example, 30° to 90°.
- a tangent line T1 is drawn on a circle C1 passing through the center P1 of the projection area R1 of the coating liquid nozzle 41 described above.
- the angle formed by the tangential line T1 in plan view and the ejection direction D1 of the coating liquid is defined as a planar liquid ejection angle ⁇ 1.
- the planar liquid ejection angle ⁇ 1 and the planar gas ejection angle ⁇ 2 are of the same magnitude, eg, 60°.
- the ejection direction D1 of the coating liquid and the ejection direction D2 of the gas can be parallel to each other in plan view. Such parallel discharge directions D1 and D2 prevent the gas flow from the gas nozzle 42 from approaching the liquid flow from the coating liquid nozzle 41, and more reliably suppress the disturbance of the liquid flow, which is preferable.
- the height distance between the lower end of the gas nozzle 42 and the surface of the wafer W is defined as a nozzle height distance H (see FIG. 4). If the nozzle height distance H is too large, the pressure of the air acting on the hump M1 will decrease. From such a point of view and the results of evaluation tests described later, the nozzle height distance H is preferably smaller than, for example, 10 mm, more preferably 3 mm to 5 mm.
- the flow rate of the air discharged from the gas nozzle 42 is preferably greater than 10 L/min, for example 20 L/min or more.
- the diameter of the discharge port 43 (diameter of the discharge port 43) L0 is, for example, 0.5 mm to 2 mm.
- the coating film forming apparatus 1 includes a control section 10.
- the control unit 10 is configured by a computer and has a program.
- the program incorporates a group of steps so that a series of operations in the coating film forming apparatus 1, which will be described later, can be performed.
- the control section 10 outputs a control signal to each section of the coating film forming apparatus 1 according to the program, and the operation of each section is controlled.
- each operation such as the number of rotations of the spin chuck 11 by the rotation mechanism 12, the elevation of the pin 13 by the elevating mechanism 14, the supply of the coating liquid to the coating liquid nozzle 41 by the coating liquid supply unit 41A, the supply of air to the gas nozzle 42 by the gas supply unit 42A, and the movement of each nozzle by the movement mechanism 32 is controlled by the above control signal.
- the above program is stored in a storage medium such as a compact disc, hard disk, or DVD, and installed in the control unit 10 .
- FIGS. 6 to 8 show vertical cross sections of regions of the coating film M along the radial direction of the wafer W.
- FIGS. 10 and 11 portions of the surface of the coating film M where drying has progressed relatively significantly are indicated by thick lines.
- the wafer W is transferred onto the cup 21 by the transfer mechanism (not shown) while the coating liquid nozzle 41 and the gas nozzle 42 are waiting at the waiting position outside the cup 21 .
- a wafer W is placed and held on the spin chuck 11 via the pins 13 .
- the wafer W rotates at a rotation speed lower than 250 rpm, specifically at 100 rpm, for example.
- the coating liquid nozzle 41 and the gas nozzle 42 are moved to their respective processing positions by the moving mechanism 32, air discharge from the gas nozzle 42 is started, and an air flow directed toward the peripheral edge of the wafer W is formed at the peripheral edge portion of the surface of the wafer W (FIG. 6).
- the air By rotating the wafer W one or more times, for example, a plurality of times from the start of air discharge, the air is supplied to the entire peripheral portion of the wafer W, and the temperature of each portion of the peripheral portion becomes uniform. Subsequently, the coating liquid is discharged from the coating liquid nozzle 41 onto the already-described projection region R1 of the wafer W (FIG. 9). The coating liquid flows toward the peripheral edge of the wafer W due to the centrifugal force generated by the rotation of the wafer W and the force of the ejection from the coating liquid nozzle 41, thereby forming the coating film M (FIG. 7). The liquid flow of the coating liquid discharged from the coating liquid nozzle 41 is indicated as 40 in each figure.
- the side surface of the hump M1 facing the center P of the wafer W (that is, the inner peripheral end surface of the coating film M) is less likely to flow, and drying progresses relatively quickly (FIG. 10).
- the hump M1 moves to the vicinity of the position where air is being discharged (near the previously described projection region R2), so that the hump M1 is exposed to the air flow, and wind pressure toward the peripheral edge of the wafer W acts on the hump M1. Due to this wind pressure, the side surface of the hump M1, which has been dried, cracks vertically, and the upper portion of the hump M1 shifts toward the peripheral edge of the wafer W with respect to the lower portion. The upper portion of the hump M1 moving toward the peripheral edge of the wafer W sinks downward from its original height because the fluidity of the coating film M is ensured when the air is discharged (FIG. 11).
- the hump M1 is collapsed by the wind pressure so as to be divided into upper and lower parts, and each of the divided parts forms projections at different positions in the radial direction of the wafer W, but these projections are smaller in height than the original hump M1. Therefore, the coating film M has a uniform height in the radial direction.
- the area of the coating film M in which the height in the radial direction is uniform in this way moves away from the position where the air is discharged due to the rotation of the wafer W, and drying and solidification progresses in each part of the area (FIG. 12).
- the coating liquid nozzle 41 stops discharging the coating liquid (FIG. 8).
- the ejection of the coating liquid moves to the vicinity of the projection area R2 and receives the action of air, that is, after the hump M1 is completely removed from the entire circumference of the wafer W, the ejection of air from the gas nozzle 42 is stopped.
- the rotation of the wafer W is stopped. After that, the substrate is transferred to a transport mechanism (not shown) in the reverse operation of the transfer to the spin chuck 11 and carried out from the coating film forming apparatus 1 .
- the coating film forming apparatus 1 since the formation of the hump M1 is suppressed, it is possible to improve the uniformity of the height of the coating film M in the radial direction. Therefore, it is possible to suppress the occurrence of defects in processing the wafer W in the post-process after the coating film M is formed, due to the formation of the hump M1. As a result, the yield of semiconductor products manufactured from the wafer W can be prevented from decreasing.
- the type of the coating film M is not particularly limited, but in describing this specific example, it is assumed to be a film formed on a wafer W on which a lower layer film and a patterned resist film are sequentially formed facing upward. More specifically, the resist film is not formed on the peripheral portion of the wafer W, and the coating film M is formed so as to cover the lower layer film at the peripheral portion and surround the resist film.
- the coating film M serves as a protective film that prevents etching of the periphery of the lower layer film when the pattern is transferred to the lower layer film by dry etching along the pattern of the resist film.
- the coating film M is etched together with the lower layer film, and the processing conditions for the etching are set so that the coating film M is completely removed at the end of the etching.
- this hump M1 will become a residue on the underlying film after etching. That is, since the portion forming the hump M1 in the coating film M is thicker than other portions, it may not be completely removed by etching and may remain. It is conceivable that the residue of the coating film M turns into particles and adheres to the pattern formed in the lower layer film, thereby causing the above-described decrease in yield.
- the coating film M can be formed so as not to form the hump M1, so that the decrease in yield due to the residue can be prevented.
- the temperature of each portion of the peripheral edge of the wafer W is uniformed by starting the supply of air from the gas nozzle 42 to the wafer W before the coating liquid nozzle 41 starts discharging the coating liquid. Therefore, after the coating liquid is supplied, the drying of the coating liquid progresses with high uniformity in each part of the peripheral portion, and thus the variation in the film thickness is suppressed, which is preferable.
- the rotation speed of the wafer W is set lower than 250 rpm when the coating liquid and the air of the coating liquid are discharged to the wafer W because, as will be described later in the evaluation test, if the rotation speed of the wafer W is too high, the drying of the hump M1 proceeds quickly. In other words, such a rotational speed is preferable because drying of the hump M1 can be suppressed and the hump M1 can be removed with high certainty.
- the coating liquid is applied only once to the peripheral portion of the wafer W, i.e., is not overcoated.
- FIG. 13 a coating film forming apparatus 5, which is a modified example of the coating film forming apparatus 1, will be described with reference to FIG. 13, focusing on differences from the coating film forming apparatus 1.
- the support 33 provided with the coating liquid nozzle 41 is not provided with the sub-arm 35 and the gas nozzle 42 , and the support 33 is composed only of the arm 34 .
- the coating film forming apparatus 5 is provided with a guide 51, a moving mechanism 52, and an arm portion 54, which are configured in the same manner as the guide 31, the moving mechanism 32, and the arm portion 34, respectively.
- a gas nozzle 42 is provided at the tip of the arm portion 54, and the gas nozzle 42 can be moved horizontally and vertically by the moving mechanism 52.
- the coating liquid nozzle 41 and the gas nozzle 42 are connected to different moving mechanisms 32 and 52, respectively, and can move independently of each other.
- the moving mechanism 32 corresponds to the first moving mechanism
- the moving mechanism 52 corresponds to the second moving mechanism.
- the coating liquid is discharged from the coating liquid nozzle 41 at positions other than the positions described as the processing positions in the coating film forming apparatus 1 .
- air is discharged onto the rotating wafer W from the gas nozzle 42 at the processing position.
- the application liquid is started to be discharged from the application liquid nozzle 41 .
- the position of the coating liquid nozzle 41 at the start of ejection is a position horizontally away from the above-described processing position as indicated by the solid line in FIG. Note that the processing position is indicated by a chain line in the figure.
- the coating liquid nozzle 41 that has discharged the coating liquid is horizontally moved toward the processing position.
- the projection area R1 onto the wafer W of the coating liquid nozzle 41 moves from the peripheral end of the wafer W toward the center P side of the wafer W along the radial direction of the wafer W.
- the coating liquid nozzle 41 is stopped, and when the coating film R is formed on the entire circumference of the wafer W, the ejection of the coating liquid is stopped.
- the gas nozzle 42 may remain stationary during the ejection of the coating liquid, or may include a period of movement.
- the coating liquid nozzle 41 is movable independently of the gas nozzle 42 as in the coating film forming apparatus 5
- the coating liquid nozzle 41 may be stopped at the processing position during the coating liquid ejection as described with reference to FIGS. 6 to 8.
- the configuration of the coating film forming apparatus 1 is advantageous in that the configuration of the apparatus is simple.
- the gas nozzle is not limited to a configuration including a circular discharge port 43 like the gas nozzle 42 described above.
- FIG. 15 shows an example in which a gas nozzle 61 is provided instead of the gas nozzle 42 in the coating film forming apparatus 1 .
- the gas nozzle 61 is formed in the shape of a rectangular block, and an air flow path 62 extending downward from above is formed inside the gas nozzle 61 .
- the flow path 62 is formed obliquely from the center P side of the wafer W toward the peripheral edge side at the gas nozzle 61 at the processing position.
- a lower end surface 63 of the gas nozzle 61 faces the wafer W, and a discharge port 64 forming a downstream end of the flow path 62 is opened in the lower end surface 63 .
- the discharge port 64 is an arcuate slit in plan view.
- FIG. 16 is a plan view of the wafer W.
- FIG. 16 is a plan view of the wafer W.
- the ejection port 64 is arcuate, the projected area R3 of the ejection port 64 onto the wafer W in the air ejection direction is also arcuate.
- the arc of this projection region R3 is along the inner peripheral edge of the coating film M as shown in FIG. That is, the ejection port 64 is formed along the inner peripheral edge.
- the width center P3 of the projection area R3 is indicated by a dotted line.
- FIG. 17 shows an example in which the discharge port 64 is a linear slit instead of a curved shape along the inner peripheral edge of the coating film M.
- the distance from the coating film M in the air ejection direction to the inner peripheral edge in the plan view differs for each part in the length direction of the width center P3 of the projection region R3.
- the ejection port 64 may be a curved slit that does not follow the inner peripheral edge of the coating film M.
- FIG. The positional relationship between the inner peripheral end of the coating film M and the width center P3 of the projection region R3 in this case is the same as the positional relationship between the inner peripheral end of the coating film M and the width center P3 of the projection region R3 when the ejection port 64 is a linear slit as shown in FIG.
- it is preferable that at least part of the width center P3 is within the range described as the film separation distance L1.
- each gas nozzle has been described as having a configuration for ejecting air from the center side of the wafer W toward the peripheral edge side, the air may be ejected vertically downward. That is, the side view nozzle angle ⁇ shown in FIG. 4 may be 90°. Since the inside of the cup 21 is evacuated while the wafer W is being processed, the air discharged in the vertical direction flows along the surface of the wafer W toward the outer circumference of the wafer W. As shown in FIG. Therefore, the wind pressure of this air can be applied to the hump M1 as described above. However, in order to obtain the effect of the air more reliably, it is preferable that the gas nozzle is configured to discharge air from the center side of the wafer W toward the peripheral edge side.
- the period during which the coating liquid is discharged onto the wafer W overlaps with the period during which air is discharged onto the wafer W.
- the discharge of the air may be started after the discharge of the coating liquid is completed.
- the application liquid ejection period and the air ejection period may not overlap.
- these discharge periods overlap, and it is more preferable to overlap the discharge periods and set the timing to start discharging the gas earlier than the timing to start discharging the coating liquid.
- the gas to be discharged onto the wafer W is not limited to air, and an inert gas such as nitrogen gas may be used.
- a heater, a cooling mechanism, or the like may be provided in the gas supply section 42A to supply gas at a temperature higher or lower than normal temperature to the gas nozzle 42 .
- ⁇ Evaluation test 1 Coating films M were formed on wafers W as evaluation tests 1-1 to 1-5.
- a testing apparatus having the same configuration as the coating film forming apparatus 1 was used. Therefore, the gas nozzle 42 already described is used as the gas nozzle.
- the film thickness of the coating film M at each position along the radial direction was measured using a stylus profilometer. To describe this measurement in more detail, the tip (lower end) of the vertically movable needle was brought into contact with the surface of the wafer W. As shown in FIG.
- the needle was moved along the radial direction of the wafer W toward the peripheral edge of the wafer W. As shown in FIG. The film thickness was measured by detecting the up-and-down movement of the needle moving in the radial direction.
- the combination of the number of rotations of the wafer W during ejection of the coating liquid and air, the flow rate of the air ejected from the gas nozzle 42, and the timing of starting the ejection of air is different.
- the rotation speed of the wafer W was set to 100 rpm, and the coating liquid and air were discharged onto the wafer W for processing.
- the start of air discharge was set at a time several seconds after the coating film M was formed on the entire circumference of the wafer W.
- the flow rate of the discharged air was set to 40 L/min. This flow rate corresponds to a wind speed of 7 m/sec.
- the rotation speed of the wafer W was set to 100 rpm, and the coating liquid and air were discharged onto the wafer W for processing.
- the air ejection start point is earlier than the application liquid ejection start point, as in the embodiment.
- the flow rate of the air discharged from the gas nozzle 42 was set to 40 L/min as in the evaluation test 1-1.
- evaluation test 1-3 the air flow rate was set to 30 L/min. This flow rate corresponds to a wind speed of 10 m/sec. Also, in evaluation test 1-4, the air flow rate was set to 20 L/min. This flow rate corresponds to a wind speed of 7 m/sec. Evaluation Tests 1-3 and 1-4 had the same processing conditions as Evaluation Test 1-2, except that the flow rate of air was different. Evaluation test 1-5 was performed in the same manner as evaluation test 1-3, except that the rotation speed of wafer W was set to 250 rpm. Incidentally, in the evaluation tests 1-1 to 1-5, the film separation distance L1 described with reference to FIGS. 3 and 4 was set to 0 mm.
- FIG. 18 is a graph showing the results of Evaluation Test 1.
- a position a predetermined distance away from the center P of the wafer W is defined as 0 mm, and the distance (unit: mm) from the position defined as 0 mm toward the peripheral edge of the wafer W along the radial direction of the wafer W is shown.
- the distance is expressed as a position in the radial direction.
- the vertical axis of the graph indicates the height of the surface of the coating film M (unit: ⁇ m), where the height of the surface of the wafer W on which the coating film M is not formed is 0 mm. Since the horizontal and vertical axes of the graph are set in this manner, the waveform of the graph represents the shape of the coating film M along the radial direction of the wafer W.
- FIG. 19 and subsequent figures shown in the evaluation test 2 and subsequent tests, the vertical and horizontal axes are set in the same manner as the vertical and horizontal axes of the graph of FIG.
- the rotation speed of the wafer W is less than 250 rpm, and more preferably 100 rpm or less, as described in the embodiment.
- the second peak is smaller in the order of Evaluation Tests 1-4, 1-3, and 1-2. That is, the larger the flow rate of air, the smaller the second stage peak. Therefore, it can be seen that the air flow rate is preferably 20 mL/min or more, and more preferably a higher flow rate within that range.
- ⁇ Evaluation test 2 As in Evaluation Test 1, a test apparatus was used to form a coating film M on a wafer W, and the film thickness of the coating film M was measured. In this evaluation test 2, the coating film M was formed by setting the film separation distance L1 described in FIG. In evaluation tests 2-1, 2-2, and 2-3, the film separation distance L1 was set to 0 mm, 3 mm, and 5 mm, respectively. In these evaluation tests 2-1 to 2-3, the nozzle height distance H described in FIG. 4 was set to 5 mm, and the side view nozzle angle ⁇ was set to 60°.
- evaluation tests 2-1, 2-2, and 2-3 are indicated in the graph of FIG. 19 by broken lines, dotted lines, and solid lines, respectively.
- evaluation test 2-3 a relatively large peak of about 3 ⁇ m was shown at a position near 0.5 mm in the radial direction, but such a large peak was not observed in evaluation tests 2-1 and 2-2. Therefore, it was confirmed that the hump M1 could not be removed in the evaluation test 2-3, but the hump M1 could be removed in the evaluation tests 2-1 and 2-2.
- the film separation distance L1 is preferably set to a value smaller than 5 mm, and more preferably set to 0 mm to 3 mm.
- ⁇ Evaluation test 3 As in Evaluation Test 1, a test apparatus was used to form a coating film M on a wafer W, and the film thickness of the coating film M was measured. In this evaluation test 3, the nozzle height distance H was set to a different value for each wafer W, and the coating film M was formed. As evaluation tests 3-1, 3-2, and 3-3, the nozzle height distance H was set to 3 mm, 5 mm, and 10 mm, respectively. In these evaluation tests 3-1 to 3-3, the film separation distance L1 was set to 0 mm, and the side view nozzle angle ⁇ was set to 60°.
- Evaluation Tests 3-1, 3-2, and 3-3 are indicated in the graph of FIG. 20 by dashed lines, dotted lines, and solid lines, respectively.
- the first and second peaks were observed at a radial position of about 0.5 mm, and the second peak was relatively large at 1.5 ⁇ m or more.
- the hump M1 collapsed as explained in FIG. 11, and it was confirmed that the height of the protrusion of the film caused by the collapse could be suppressed.
- the nozzle height distance H is preferably less than 10 mm, more preferably 3 mm to 5 mm.
- ⁇ Evaluation test 4 As in Evaluation Test 1, a test apparatus was used to form a coating film M on a wafer W, and the film thickness of the coating film M was measured. In this evaluation test 4, the coating film M was formed by setting the side view nozzle angle ⁇ to a different value for each wafer W. FIG. As evaluation tests 4-1 and 4-2, the side view nozzle angles ⁇ were set to 60° and 30°, respectively. In these evaluation tests 4-1 and 4-2, the film separation distance L1 was set to 0 mm, and the nozzle height distance H was set to 3 mm.
- evaluation tests 4-1 and 4-2 are shown in the graph of FIG. 21 by solid and dotted lines, respectively. As is clear from the waveforms of the graphs, the presence of the hump M1 was not indicated in both Evaluation Tests 4-1 and 4-2, and was considered to have been removed. As described above, the result of Evaluation Test 4 indicates that the hump M1 can be removed when the side view nozzle angle ⁇ is set to 30° to 60°, which is preferable.
- ⁇ Evaluation test 5 As in Evaluation Test 1, a test apparatus was used to form a coating film M on a wafer W, and the film thickness of the coating film M was measured. In this evaluation test 5, the temperature of the air supplied to the gas nozzle 42 was set to a different value for each wafer W, and the coating film M was formed. The temperatures were set to 24° C., 20° C. and 16° C. for evaluation tests 5-1, 5-2 and 5-3, respectively. Note that 24°C is the same as the room temperature of the room where the test is conducted. In these evaluation tests 5-1 to 5-3, the film separation distance L1 was set to 0 mm, the nozzle height distance H was set to 3 mm, and the flow rate of discharged air was set to 20 L/min.
- the results of evaluation tests 5-1, 5-2, and 5-3 are shown in the graph of FIG. 22 by a chain line, a dotted line, and a solid line, respectively.
- none of the evaluation tests 5-1 to 5-3 showed the existence of the hump M1, and it is considered that it was removed. Therefore, it was shown that the air temperature in the range of 16° C. to 24° C. has little effect on the removability of the hump M1, and that the air temperature of 16° C. to 24° C. is preferable as the air temperature to be used.
- ⁇ Evaluation test 6 As in Evaluation Test 1, a test apparatus was used to form a coating film M on a wafer W, and the film thickness of the coating film M was measured. In this evaluation test 6, the coating film M was formed by setting the flow rate of the ejected air to a different value for each wafer W. FIG. As evaluation tests 6-1, 6-2, and 6-3, the flow rates were set to 30 mL/min, 20 mL/min, and 10 mL/min, respectively. In these evaluation tests 6-1 to 6-3, the film separation distance L1 was set to 0 mm, the nozzle height distance H was set to 3 mm, and the temperature of the discharged air was set to 16.degree.
- the results of evaluation tests 6-1, 6-2, and 6-3 are indicated by solid lines, dotted lines, and chain lines in the graph of FIG. 23, respectively.
- the first and second peaks were observed at a position in the vicinity of 0.5 mm in the radial direction, and the height of the second peak was relatively large at 1 ⁇ m or more.
- the peak height was 0.5 ⁇ m or less. Therefore, in Evaluation Tests 3-1 and 3-2, it was considered that the hump M1 collapsed as described with reference to FIG. 11, and it was confirmed that the height of the protrusion of the membrane caused by the collapse could be suppressed.
- the flow rate of the discharged air is preferably greater than 10 L/min, and more preferably 20 L/min.
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Abstract
Description
回転する前記基板の周縁部の第1位置に塗布液を吐出して当該基板の周に沿った環状の塗布膜を形成する塗布液ノズルと、
回転する前記基板において前記第1位置よりも当該基板の回転中心寄りで当該基板の回転方向の下流側の第2位置にガスを吐出し、当該第2の位置から前記基板の周端に向う前記ガスの流れによって前記塗布膜を整形するために設けられるガスノズルと、
を備える。
続いて、本技術に関連した評価試験について説明する。
・評価試験1
評価試験1-1~1-5としてウエハWに塗布膜Mを形成した。この処理は、塗布膜形成装置1と同様の構成の試験装置を用いた。従ってガスノズルとしては、既述したガスノズル42が用いられている。そして塗布膜を形成したウエハWについて、触針式段差計を用いて、径方向に沿った各位置の塗布膜Mの膜厚を測定した。この測定についてより詳しく述べると、上下動可能な針の先端(下端)をウエハWの表面に当接させた。そして、この針をウエハWの径方向に沿って、当該ウエハWの周端へ向けて移動させた。この径方向に移動中の針の上下動を検出することで膜厚を測定した。評価試験1-1~1-5間では、塗布液及びエアの吐出中のウエハWの回転数、ガスノズル42から吐出するエアの流量、エアの吐出を開始するタイミングの組み合わせについて異なる。
評価試験1と同様に、試験装置を用いてウエハWに塗布膜Mを形成して塗布膜Mの膜厚を測定した。この評価試験2では、図4等で述べた膜離間距離L1についてウエハW毎に異なる値に設定して塗布膜Mを形成した。評価試験2-1、2-2、2-3として、膜離間距離L1を0mm、3mm、5mmに夫々設定した。これら評価試験2-1~2-3では、図4で説明したノズル高さ距離Hは5mm、側面視ノズル角度θは60°とした。
評価試験1と同様に、試験装置を用いてウエハWに塗布膜Mを形成して塗布膜Mの膜厚を測定した。この評価試験3では、ノズル高さ距離HについてウエハW毎に異なる値に設定して塗布膜Mを形成した。評価試験3-1、3-2、3-3として、ノズル高さ距離Hを3mm、5mm、10mmに夫々設定した。これら評価試験3-1~3-3では、上記した膜離間距離L1を0mm、側面視ノズル角度θを60°に設定した。
評価試験1と同様に、試験装置を用いてウエハWに塗布膜Mを形成して塗布膜Mの膜厚を測定した。この評価試験4では、側面視ノズル角度θについて、ウエハW毎に異なる値に設定して塗布膜Mを形成した。評価試験4-1、4-2として、当該側面視ノズル角度θを60°、30°に夫々設定した。これら評価試験4-1~4―2では、上記した膜離間距離L1は0mm、ノズル高さ距離Hは3mmとした。
評価試験1と同様に、試験装置を用いてウエハWに塗布膜Mを形成して塗布膜Mの膜厚を測定した。この評価試験5では、ガスノズル42に供給されるエアの温度について、ウエハW毎に異なる値に設定して塗布膜Mを形成した。評価試験5-1、5-2、5-3として、当該温度を24℃、20℃、16℃に夫々設定した。なお、24℃は当試験が行われる部屋の室温と同じである。これら評価試験5-1~5―3では、上記した膜離間距離L1を0mm、ノズル高さ距離Hを3mm、吐出するエアの流量を20L/分に設定した。
評価試験1と同様に、試験装置を用いてウエハWに塗布膜Mを形成して塗布膜Mの膜厚を測定した。この評価試験6では、吐出するエアの流量について、ウエハW毎に異なる値に設定して塗布膜Mを形成した。評価試験6-1、6-2、6-3として、当該流量を30mL/分、20mL/分、10mL/分に夫々設定した。これら評価試験6-1~6―3では、上記した膜離間距離L1を0mm、ノズル高さ距離Hを3mm、吐出するエアの温度を16℃に設定した。
R1 投影領域
R2 投影領域
41 塗布液ノズル
42 ガスノズル
Claims (16)
- 基板を保持して回転させる回転保持部と、
回転する前記基板の周縁部の第1位置に塗布液を吐出して当該基板の周に沿った環状の塗布膜を形成する塗布液ノズルと、
回転する前記基板において前記第1位置よりも当該基板の回転中心寄りで当該基板の回転方向の下流側の第2位置にガスを吐出し、当該第2位置から前記基板の周端に向う前記ガスの流れによって前記塗布膜を整形するために設けられるガスノズルと、
を備える塗布膜形成装置。 - 前記塗布液ノズルについて、前記第1位置に前記塗布液を吐出する前記基板の上方である第1処理位置と、平面視で前記基板の外側である第1待機位置と、の間で移動させ、且つ、
前記ガスノズルについて、前記第2位置に前記塗布液を吐出する前記基板の上方である第2処理位置と、平面視で前記基板の外側である第2待機位置と、の間で移動させる移動機構が設けられる請求項1記載の塗布膜形成装置。 - 前記移動機構は、前記塗布液ノズル及び前記ガスノズルに共通の移動機構である請求項2記載の塗布膜形成装置。
- 前記移動機構は、前記塗布液ノズルを移動させる第1移動機構と、
前記塗布液ノズルとは独立して前記ガスノズルを移動させる第2移動機構と、を備える請求項2記載の塗布膜形成装置。 - 前記ガスの吐出時における前記ガスノズルの前記基板の表面に対する高さは、1mm~5mmである請求項2記載の塗布膜形成装置。
- 前記ガスノズルは、前記基板の中心側から周端側へ向かうように前記ガスを前記第2位置に吐出する請求項1記載の塗布膜形成装置。
- 前記基板の表面と前記ガスノズルによるガスの吐出方向とが側面視でなす角度は60°以下である請求項6記載の塗布膜形成装置。
- 前記ガスノズルは、平面視で前記基板の回転方向に倣う方向へ前記ガスを吐出する請求項1記載の塗布膜形成装置。
- 平面視での前記基板の回転による前記第2位置の中心の軌跡がなす円に対して引いた接線と、前記ガスノズルのガスの吐出方向とがなす角度は、30°~90°である請求項8記載の塗布膜形成装置。
- 前記基板の回転方向における前記第1位置と前記第2位置との距離は、30mm~100mmである請求項1記載の塗布膜形成装置。
- 平面視での前記ガスの吐出方向において、前記第2位置の中心と前記塗布膜の内周端との距離は0mm~3mmである請求項1記載の塗布膜形成装置。
- 前記塗布液ノズルから前記第1位置へ前記塗布液を吐出する期間と、前記ガスノズルから前記第2位置へのガスを吐出する期間と、が重なる請求項1記載の塗布膜形成装置。
- 前記ガスノズルから前記第2位置への前記ガスの吐出は、前記塗布液ノズルから前記第1位置への前記塗布液の吐出の開始前に開始される請求項12記載の塗布膜形成装置。
- 前記ガスノズルの吐出口の口径は、0.5mm~2mmである請求項1記載の塗布膜形成装置。
- 回転保持部により基板を保持して回転させる工程と、
回転する前記基板の周縁部の第1位置に、塗布液ノズルから塗布液を吐出して当該基板の周に沿った環状の塗布膜を形成する工程と、
回転する前記基板において前記第1位置よりも当該基板の回転中心寄りで当該基板の回転方向の下流側の第2位置にガスノズルからガスを吐出する工程と、
当該第2位置から前記基板の周端に向う前記ガスの流れによって前記塗布膜を整形する工程と、
を備える塗布膜形成方法。 - 塗布膜形成装置に用いられるコンピュータプログラムを記憶する記憶媒体であって、
前記コンピュータプログラムは、請求項15に記載された塗布膜形成方法を実行するようにステップ群が組まれていることを特徴とする記憶媒体。
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JP2016107272A (ja) * | 2014-12-02 | 2016-06-20 | 株式会社Screenホールディングス | 基板処理装置および基板処理方法 |
JP2020047855A (ja) * | 2018-09-20 | 2020-03-26 | 株式会社Screenホールディングス | 基板処理方法および基板処理装置 |
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