WO2004078360A1 - スリットダイ、ならびに、塗膜を有する基材の製造方法および製造装置 - Google Patents
スリットダイ、ならびに、塗膜を有する基材の製造方法および製造装置 Download PDFInfo
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- WO2004078360A1 WO2004078360A1 PCT/JP2004/002537 JP2004002537W WO2004078360A1 WO 2004078360 A1 WO2004078360 A1 WO 2004078360A1 JP 2004002537 W JP2004002537 W JP 2004002537W WO 2004078360 A1 WO2004078360 A1 WO 2004078360A1
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- WIPO (PCT)
- Prior art keywords
- lip
- block
- coating
- discharge port
- slit die
- Prior art date
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Classifications
-
- 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
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0254—Coating heads with slot-shaped outlet
- B05C5/0262—Coating heads with slot-shaped outlet adjustable in width, i.e. having lips movable relative to each other in order to modify the slot width, e.g. to close it
-
- 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
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
Definitions
- the present invention relates to a slit die used for forming a coating film on a substrate surface.
- the present invention relates to a production method and a production apparatus for producing a substrate having a coating film by applying a coating liquid onto a substrate surface using the slit die.
- the form of the base material on which the coating film is formed according to the present invention includes a single-sheet form and a long sheet form.
- a glass substrate is a typical example of a single-wafer form.
- Substrates in the form of single wafers produced by the present invention include, for example, color filters for color liquid crystal displays, array substrates for TFTs, back and front plates for plasma displays, optical filters, print substrates, Used as integrated circuits and semiconductors.
- the long sheet-shaped substrate produced by the present invention is used, for example, as a film, a metal sheet, a metal foil, or paper. Background art
- a slit die is sometimes called a base, die, slot die, or dice.
- the slit die is a slit-shaped discharge port that is an opening to the outside of the lip gap through a lip gap formed between a pair of lips spaced apart from each other. It is widely used to discharge a coating liquid from a substrate and form a coating film of the coating liquid on the surface of a base material which is opposed to the discharge port at an interval.
- the slit die and the substrate are relatively moved.
- a situation of a color filter having a fine lattice pattern of three primary colors on a glass substrate will be described.
- the color filter is manufactured by sequentially applying black, red, blue, and green coating liquids on a glass substrate.
- the manufacturing process of this color filter involves forming a coating film of a photo resist material and then performing photolithography. After the turn processing, the process of forming the columns that form the space for the liquid crystal injected between the color filter and the array substrate, and the formation of an overcoat film to minimize surface irregularities Steps may be included.
- the spinner has a viscosity of several 10 mPa ⁇ s or less, and a uniform coating film can be easily formed.
- Die coaters using lit dies have come to be used.
- One of the important functions required of this slit die is to form a coating film having a uniform thickness.
- slit dies which are used for manufacturing display members such as color filters for color liquid crystal displays and back plates for plasma displays
- the length of components has been increasing year by year with the increase in the screen size of displays.
- the demands on the uniformity of the coating thickness over a large coating area have become severe.
- the lip gap which is usually set to 0.05 mm to 0.7 mm when assembling the die, should be formed uniformly with a deviation of the order of the submicron. Is required.
- conventional slit dies have a submicron-order slit due to their structure. The gap accuracy could not be achieved, and the above-described coating thickness accuracy could not be achieved.
- FIGS. 11, 12 and 13 show cross sections of different known slit dies 201, 301 and 401, respectively.
- the slit die 201 includes a die hopper 205, a right lip 202, and a left lip 203.
- the right lip 202 and the left lip 203 are opposed to each other with a lip gap 211 therebetween.
- the upper surface of the right lip 202 and the upper surface of the left lip 203 are in contact with the lower surface of the die hopper 205, respectively. Attached to hopper 205 and integrated.
- the lip gap 2 12 has a lip gap width L.
- This slit die 201 is disclosed in JP10-2642429A. In the slit die 201 having this configuration, while measuring the lip gap width L in the longitudinal direction of the lip gap 211 (the direction perpendicular to the paper surface), the two lips 210 are measured. Complicated assembling work for positioning 2, 203 with respect to the die hopper 205 is required. With this assembly work alone, it is practically impossible to achieve submicron-order rip gap accuracy.
- the slit die 301 comprises a right lip 302, a left lip 303, and a shim 304 force. Both rips 302 and 303 are connected by a port 305 with a shim 304 interposed therebetween, and are thus formed.
- the lip gap 312 is formed by the thickness St of the shim 304.
- the lip gap 3 1 2 has a lip gap width L.
- This slit die 301 is disclosed in JP2001-46969A or JP201-1-191004A. With a slit die 301 with this configuration, In other words, the lip gap width L of the lip gap 312 is equal to the thickness St of the shim 304 regardless of the assembling method. Therefore, in order to achieve the rip gap accuracy of the submicron order, a thin shim 304 having a thickness St of about 0.05 to 0.7 mm is required to have the submicron order thickness accuracy. Become.
- the slit die 401 is composed of a right lip 402 and a left lip 403. Both lips 402, 403 have mating surfaces 415 at their upper part.
- the inner lip surface 420 of the right lip 402 is located with a step L from the mating surface 415.
- the inner surface 421 of the left lip 403 is in the same plane as the mating surface 415 and forms a flat lip.
- a lip gap 4 12 is formed between the inner surface 4 20 of the right lip 402 and the inner surface 4 21 of the left lip 4 03.
- the lip gap 41 2 has a lip gap width L equal to the step amount L.
- the slit die 410 has a shape of JP 10 — 14 65 56 A or JP 1 0 — 1 5 1 3 9 5 Disclosed in A.
- the lip gap width L of the lip gap 412 becomes equal to the step amount L provided in the lip 402, so that the sub-micron order is obtained.
- step between 4 and 20 is formed by high-precision finishing on the order of submicron.
- a die coater using these slit dies a die coater comprising a coating table (slit die) having a table capable of moving forward and backward and a downward discharge port is known. I have. In this die coater, after the glass substrate is sucked and held on the table, when the glass substrate moves directly below the coating head with the table, the coating liquid is discharged from the discharge port of the coating head, A coating film of the coating liquid is continuously formed on the glass substrate.
- This die coater is disclosed in JP 6-33956A.
- Preliminary application from the die to the roll forms a coating liquid bead between the die and the roll, and then moves the die together with the bead toward the substrate to start full application on the substrate There is a technique to do. This approach is disclosed in JP 201-31 0147A.
- the method of starting the main coating on the substrate after pre-coating from the die to the roll in advance has the following disadvantages: (i) extra equipment is required and the cost is high. (Ii) Extra movements increase tact time and increase productivity (Iii) After pre-coating on a roll, a very small amount of coating liquid remains at the tip of the die discharge port, but the remaining amount is not constant, and the film thickness of the coating film at the start of coating varies. It is not stable, or (iv) the pre-coating increases the amount of ineffective coating liquid that is not required for the original coating, resulting in high cost.
- Coating film 8002 is not formed on start portion (leading portion) 8001 Film breakage 803 may occur at various places in the width direction of substrate B. The reason for this is that (i) the area around the discharge port of the die is cleaned before coating in order to keep the state of the coating start section 800 always the same. At this time, the coating liquid inside the die near the discharge port is taken away.
- the solvent of the coating liquid around the discharge port evaporates during the short time before coating after cleaning around the discharge port of the die, depending on the amount of evaporation.
- a gap may be formed inside the die near the discharge port.Therefore, there is a gap inside the die that is not filled with the coating liquid, which is directly transferred to the coating start portion 801 of the substrate B. However, it is presumed that the film breakage occurs.
- the present invention aims to solve the problems of the prior art.
- the present invention provides a slit die capable of easily obtaining submicron-order lip gap accuracy. It is intended to provide. With the slit die according to the present invention, after assembling the die, it is possible to form a uniform coating film with extremely high coating thickness accuracy of 3% or less without any special adjustment. And
- An object of the present invention is to provide a method for manufacturing a substrate having a coating film using the slit die, and a manufacturing apparatus.
- the substrate having a coating film produced by the present invention is preferably used as a member for a color liquid crystal display or a member for a plasma display.
- a coating film having a uniform film thickness can be easily formed over the entire surface of the substrate without performing preliminary coating for any type of coating liquid and coating thickness.
- ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to shorten a tact time, and to reduce the ineffective use amount of a coating liquid, and to reduce the production cost of the production of a base material having a coating film. Disclosure of the invention
- the slit die of the present invention includes a first lip and a second lip, and the first lip and the second lip are the first lip and the second lip.
- the inner surface of the second lip and the inner surface of the second lip are integrated by the rip fastening element in a state where the inner surface faces each other, and a part of these opposing inner surfaces is spaced from each other.
- a lip gap extending in the longitudinal direction of the lip is formed with the liquid supply path, and a lower end of the lip gap forms a discharge port that is opened outward, and the lip gap is formed. Both ends in the longitudinal direction are closed outward, and the upper end of the lip gap is a slit die connected to the liquid supply path.
- the first rip comprises a first block and a second block
- the gap width distribution in the longitudinal direction of the rip gap can be adjusted by the positioning element and the fixing element of the positioning element.
- a plurality of the positioning elements are provided at intervals in a longitudinal direction of the lip.
- the positioning element includes a positioning block, and the positioning block is formed between an outer surface of the first block and an outer surface of the second block.
- the positioning block is formed between an outer surface of the first block and an outer surface of the second block.
- the maximum height Ry of the surface roughness of the positioning surface of the positioning block be 0.1 S to 1.0 OS.
- the thickness of the first block and the second block in the direction perpendicular to the surface forming the lip gap is 30 mm or more, respectively.
- the cross-sectional shape of the positioning block in the direction along the position defining surface is a quadrangle
- the longitudinal length of the lip of the quadrangle is Is 20 mm to 10 O mm
- the length in a direction perpendicular to the longitudinal direction is 20 min to 10 O mm, at least in a portion where the position defining surface is located.
- the thickness of the positioning block is 30% or more of the thickness of the second block.
- a plurality of the positioning blocks are provided at intervals in a longitudinal direction of the lip.
- the arrangement interval between them is less than 10 Omm.
- the second lip may have a structure similar to that of the first lip.
- the inner surface of the first block and the inner surface of the second lip may be in contact with each other or may be located via a shim, and Preferably, the lip gap is formed between an inner surface of the block and an inner surface of the second lip.
- an inner surface of the second lip forming the lip gap with an inner surface of the second lip facing an inner surface of the first block. May be located on substantially the same plane.
- an inner surface of the first block facing an inner surface of the second lip and an inner surface of the second block forming the lip gap are formed. However, they may be located on substantially the same plane.
- the method for producing a substrate having a coating film of the present invention uses the slit die of the present invention, supplies a coating liquid to the liquid supply path of the slit die, and passes the coating liquid through the lip gap. Along with discharging the coating liquid from the discharge port, at least one of the member to be coated and the slit die, which are located at an interval from the discharge port, is relatively moved, and is discharged from the discharge port. Applying the applied coating liquid onto the member to be coated, and forming a coating film composed of the coating liquid on the member to be coated; Formed on top.
- a first step of discharging a predetermined volume Q 1 of the coating liquid from the discharge port of the slit die and a predetermined time T after the first step are completed.
- the application liquid is discharged from the discharge port, and the member to be coated is relatively moved with respect to the slit die, so that the member to be coated is moved to the member to be coated.
- the method includes a fourth step of forming a coating film.
- the length in the application direction of the surface including the discharge port is L s
- the length in the longitudinal direction of the discharge port is W
- the clearance is S l
- a first step in which the discharge port of the slit die is moved with respect to the member to be applied in a stationary state to form a clearance S2 between the two.
- a second step of discharging a constant volume Q2 of the coating liquid from the discharge port after the first step and a third step of waiting for a predetermined time Ts after the second step,
- the coating liquid is discharged from the discharge port, and the member to be coated is relatively moved with respect to the slit die, so that the coating film is formed on the member to be coated. It preferably includes a fourth step of forming.
- the discharge port of the slit die is moved relative to the stationary member to be coated, and a first clearance S 3 is formed therebetween.
- the method includes a fifth step of moving a member to be applied relatively to the slit die to form a coating film on the member to be coated.
- the size of the first clearance S 3 is smaller than the size of the second clearance S 4.
- the length in the coating direction of the surface including the discharge port is L s
- the length in the longitudinal direction of the discharge port is W
- the clearance is ,
- the coefficient is ⁇ 2
- An apparatus for producing a substrate having a coating film of the present invention includes: a slit die of the present invention; a coating liquid supply unit engaged with the liquid supply path of the slit die; A coating liquid discharging means for discharging the supplied coating liquid from the discharge port through the lip gap; and a coating material member and the slit die which are located at an interval from the discharge port.
- a coating film forming means for relatively moving one of the coating members, applying the coating liquid discharged from the discharge port on the member to be coated, and forming a coating film made of the coating liquid on the member to be coated.
- a unit configured to discharge a predetermined amount of the coating liquid from the discharge port of the slit die; Means for elapse of the standby time; After that, at least one of the member to be coated and the slit die, which are located at an interval from the discharge port, is relatively moved to apply the coating liquid discharged from the discharge port to the member to be coated. And a coating film forming means for forming a coating film composed of the coating liquid on the member to be coated.
- FIG. 1 is a perspective view showing an exploded state of each component of an embodiment of the slit die of the present invention.
- FIG. 2 is a cross-sectional view of the slit die of FIG.
- FIG. 3A, FIG. 3B and FIG. 3C show the first block and the second block constituting the first lip of the slit die shown in FIG.
- FIG. 4 is a cross-sectional view for explaining a step of assembling the positioning block.
- FIG. 4 is a cross-sectional view of another embodiment of the slit die of the present invention.
- FIG. 5 is a cross-sectional view of yet another embodiment of the slit die of the present invention.
- FIG. 6 is a cross-sectional view of still another embodiment of the slit die of the present invention.
- FIG. 7 is a cross-sectional view of still another embodiment of the slit die of the present invention.
- FIG. 8 is a cross-sectional view of still another embodiment of the slit die of the present invention.
- FIG. 9 is a schematic perspective view of an example of an apparatus (die coater) for performing the method for producing a substrate having a coating film of the present invention.
- FIG. 10 is a schematic system diagram illustrating an example of a coating liquid supply system, a coating liquid coating procedure, and a control system therefor in the die coater of FIG.
- FIG. 1r is a cross-sectional view of an example of a conventional slit die.
- FIG. 12 is a cross-sectional view of another example of the conventional slit die.
- FIG. 13 is a cross-sectional view of still another example of the conventional slit die.
- FIG. 14 shows a coating liquid supply system, a coating liquid coating procedure, and control for the same in another example of an apparatus (die coater) for performing the method of manufacturing a substrate having a coating film according to the present invention. It is a schematic system diagram explaining an example of a system.
- FIG. 15 is a time chart explaining the operation state of each operation unit when applying the coating liquid to the substrate using the die coater of FIG.
- FIG. 16A is a plan view for explaining an unfavorable application state of the application liquid on the substrate.
- FIG. 16B is a plan view illustrating a preferable application state of the application liquid on the substrate.
- FIG. 17 is a schematic perspective view for explaining a formation state of a bead formed between the slit die and the substrate in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- the slit die 1 of the present invention comprises a first lip 3 and a second lip 2.
- the inner surfaces 15a, 15b of the first lip 3 and the inner surfaces 17a, 17b of the second lip 2 are opposed to each other by the lip fastening element while being opposed to each other. It is integrated so that it can be separated.
- six assembly ports 7 spaced from each other are used as the rip fastening elements.
- the opposing inner surfaces 15a, 15b, 17a, 17b are spaced apart, which allows the liquid supply channel (manifold) 12 and lip 2 3 and a lip gap 13 extending in the longitudinal direction. Rip gap The lower end of 13 forms a discharge port 14 opened outward. Both ends in the longitudinal direction of the lip gap 13 are closed to the outside by the sealing plates 6a and 6b.
- the upper end of the lip gap 13 is connected to the liquid supply passage (manifold) 12.
- the liquid supply passage (manifold) 12 has a coating liquid supply port 11, and the coating liquid supply port 11 is provided with a coating liquid supply means (not shown) through a supply pipe (not shown). Is connected.
- the coating liquid supplied from the coating liquid supply means flows from the coating liquid supply port 11 to the manifold 12, and the flow of the coating liquid is changed to the coating liquid supply port 11 by the manifold 12. It is guided to the left and right sides around the center, flows into the lip gap 13, and is discharged from the discharge port 14.
- the first rip 3 is composed of a first block 4 and a second block 5, and the lower surface of the first block 4 and the upper surface of the second block 5. Are the same in the longitudinal direction.
- the inner surface 17a of the second lip 2 and the inner surface 15a of the first block 4 are in contact with each other.
- the lower surface of the first block 4 and the upper surface of the second block 5 are in contact with each other.
- the first block 4 and the second block 5 are connected to the surface (the inner surface of the second block) 15b forming the lip gap 13 of the first lip 3. It is engaged by a block engaging element that allows the relative position in the right angle direction to be adjusted.
- a block engaging element that allows the relative position in the right angle direction to be adjusted.
- bolts 8 and nuts 9 are used as block engaging elements.
- the first block 4 and the second block 5 are fastened and integrated by a block fastening element after the relative position is adjusted.
- Porto 8 and Nut 9 are used as block fastening elements.
- the bolt 8 and the nut 9 function as a block engagement element and as a block fastening element.
- the lock engagement element and the lock fastening element are separated so as to perform their respective functions separately. May be constituted.
- a positioning element is provided for defining the relative position between the first and second blocks 4 and 5.
- five stepped blocks 10 are used as positioning elements, which are spaced apart from each other.
- the upper inner surface 10a of the stepped block 10 is in contact with the outer surface 16a of the first block 4, and the lower inner layer 10b of the stepped block 10 is In contact with the outer surface 16b of block 5.
- the inner surface 10a and the inner surface 10b form a position defining surface.
- a positioning element fixing element for fixing the positioning element (stepped block 10) to the first lip 3 including the first block 4 and the second block 5 is provided.
- a bolt 20 is used as a fixing element of the positioning element (stepped block 10).
- the second surface forming the lip gap 13 is formed with the inner surface 17a of the second lip 2 facing the inner surface 15a of the first block 4.
- the inner surface 17 b of the tip 2 is located substantially on the same plane.
- the lip gap width Lg of the lip gap 13 is increased by the positioning element (stepped block 10) and the fixing element of the positioning element (bolt 20). It is adjusted to be uniform in the longitudinal direction.
- the difference in the position of the distance H between the position of the inner surface 15a of the first block 4 and the position of the inner surface 15b of the second block 5 in the direction perpendicular to the respective inner surfaces. is there.
- the difference between the distances H is referred to as a step H
- the size of the step H is referred to as a step amount H.
- the difference between the distances h is referred to as a step h, and the size of the step h is referred to as a step amount h.
- the step H having the step amount H is formed by pressing five stepped blocks 10 having a step h on the outer surface 16 a of the first block 4 and the outer surface 16 b of the second block 5. It is formed by hitting.
- the number of stepped procks 10 is not particularly limited, but the interval between them is not particularly limited, but as the length of the slit die 1 becomes longer, the stepped proxes 10 become at least two in the longitudinal direction. It is preferable that at least five, preferably at least five are provided.
- the disposition interval is desirably 100 mm or less in order to form a step H having a uniform size over the longitudinal direction of the slit die 1.
- the lip gap 13 provides a flow resistance to the coating liquid and plays a role of discharging the coating liquid from the discharge port 14 with a uniform distribution.
- the gap width Lg of the lip gap 13 is preferably from 30 / im to 1,000 / zm in order to give a desired flow resistance to the coating solution. And more preferably 50 / zm to 600 ⁇ m.
- the length Ld of the lip gap 13 in the direction in which the coating liquid is discharged is preferably from 3 mm to 10 Omm, more preferably from 5 mm to 7 Omm.
- the length in the longitudinal direction of the discharge port 14, which is the discharge width of the coating liquid, is determined by the arrangement interval Lw between the two seal plates 6a and 6b.
- the material and shape of the sealing plates 6a and 6b are not particularly limited as long as they are not affected by the solvent contained in the coating liquid and can be sealed so that the coating liquid does not leak.
- a metal plate such as stainless steel with a thickness equal to or slightly smaller than the width L g
- an elastic member having a thickness slightly larger than the gap width Lg, a resin sheet such as polyethylene terephthalate, or the like is suitably used.
- step H in the preferred first lip 3 in this embodiment will be described with reference to FIGS. 3A, 3B and 3C.
- the first block 4 and the second block 5 have respective thicknesses L t in a direction perpendicular to the respective inner surfaces 15a and 15b. For equality, they are superimposed one on top of the other and are simultaneously machined, temporarily fixed by Port 8 and Nut 9. In this state, all the stepped blocks 10 are connected to the outer surface 16a of the first block 4 with bolts 20, as shown in FIG. 3B.
- the second block 5 is slid in a direction perpendicular to the inner surface 15b, and the outer surface 16b of the second block 5 is stepped.
- the first block Adjustment of the relative position between 4 and the second block 5 is completed.
- the first lip 3 composed of the first block 4 and the second block 5 has a step difference equal to the step amount h of the stepped block 10.
- the step H with the amount H is formed uniformly over the length of the blocks 4 and 5.
- the step amount h between the first block 4 and the second block 5 can be reduced by slightly changing the step amount h of each stepped block 10. Fine adjustment can be performed. As a result, the gap width Lg of the lip gap 13 equal to the step amount H can be finely adjusted freely in the longitudinal direction of the lip gap 13. By this fine adjustment, the lip gap 13 having a deviation with a gap width L g of submicron order can be obtained by simply combining the first lip 3 and the second lip 2. It can be easily formed.
- the contact surface between the first block 4 and the second block 5, that is, the upper part of the step block 10 is required.
- the surface roughness of the inner surface 10a and the lower inner surface 10b is the maximum height (Ry) defined by JIS—B—031 (1994). 1. It is preferable to be in the OS range.
- each thickness Lt is 30 mm or more.
- each of the blocks 4 and 5 is likely to warp in the longitudinal direction in a section where the stepped block 10 does not exist. Fine adjustment of the step height H becomes difficult.
- the shape of the stepped block 10 is such that the width in the longitudinal direction of the slit die 1 is in the range of 20 mm to 100 mm, and the height in the direction orthogonal thereto is 20 mm to 100 O. It is preferably in the range of mm. If the shape of the stepped block 10 is smaller than the lower limit of these ranges, the correction force required to freely finely adjust the step amount H is not sufficiently developed. Conversely, if the upper limit of these ranges is exceeded, it becomes difficult to slightly change the step height h by processing means such as lapping and grinding. Stepped block 10 is the amount of step
- the thickness of the stepped block 10 should be the thickness of the second block 5 at the thinnest part (for example, the part corresponding to the dimension Lb shown in FIG. 3B). It is preferably 30% or more of Lt.
- the deviation of the step difference h between the stepped blocks 10 is preferably 1 zin or less, more preferably 0.5 ⁇ or less.
- the inner surface 17a, 17b, 1st The flatness of the inner surface 15a and the outer surface 16a of the second block 5 and the inner surface 15b and the outer surface 16b of the second block 5 are preferably 5 ⁇ or less. Each surface is preferably finished so as to be preferably 2 / m or less.
- the flatness is defined in the section of “Definition and indication of the number of deviations” in JIS—B-062 1 (1984).
- the first lip 3 and the second lip 2 have the same rigidity.
- the thickness of the second lip 2 is equal to the thickness t of the first block 4 and the second block 5.
- the slit die 1 shown in this embodiment since it has the above-described configuration, it is a slit die that forms a large-area coating film despite its length. Nevertheless, submicron order rip gap accuracy is easily provided. Therefore, according to the slit die 1, the stepped block 10 is fixed to the first lip 3, and after the slit die 1 is assembled, special adjustment is required. In addition, it enables the formation of a coating film having an extremely high coating thickness accuracy of 3% or less.
- the viscosity of the coating solution flowing through the manifold 12 changes greatly and the thickness uniformity of the coating is impaired by factors other than the lip gap distribution,
- the step height h of the stepped block 10 located in the portion where the thickness change is large the thickness unevenness of the coating film due to this factor can be improved.
- the size of the gap width L g of the lip gap 13 is changed by changing the size of the step height h of the step block
- a lip gap 13 having a distribution corresponding to an arbitrary coating film thickness profile is formed. It is also possible.
- the positioning element for positioning the first block 4 and the second block 5 by sliding them relative to each other is not limited to the stepped block 10. Examples of positioning elements other than the stepped block will be described below.
- FIG. 4 shows another embodiment of the slit die of the present invention.
- the slit die 101 is provided with the first lip 3, the second lip 2, and the first lip 3 as in the embodiment shown in FIG.
- the first block 4 and the second block 5 that constitute the first block 4 and the first block 4 and the second block 5 are engaged with and fastened to the port 8 and the nut 8, respectively.
- G consist of 9 powers.
- the slit die 101 has a lip gap 13, a discharge port 14, and a manifold 12, similarly to the embodiment shown in FIG.
- the slit die 101 is, like the embodiment shown in FIG. 2, the inner surface 17 of the second lip 2 facing the inner surface 15a of the first block 4. a and the inner surface 17 b of the second lip 2 forming the lip gap 13 are located substantially on the same plane.
- the slit die 101 is a positioning element composed of a flat block 110 and a shim 111 (positioning assisting step).
- the inner surface 110 Oa of the flat block 110 consists of a single plane.
- the inner surface 110a is in contact with the outer surface 16b of the second block 5.
- a shim 111 is interposed between the outer surface 16a of the first block 4 formed by the step and the inner surface 110a of the flat block 110.
- the shim 111 is attached to the gap when the flat block 110 and the second block 4 are fixed by the bolt 20 of the flat block 110. It is something.
- the thickness of the shim 111 is adjusted to be the gap width Lg of the lip gap 13.
- Fine adjustment of the step amount H between the first block 4 and the second block 5 can be performed by fine adjustment of the surface roughness of the inner surface 110a of the flat block 110 or the shim 11 This is done by fine-tuning the thickness of 1.
- the gap width Lg of the lip gap 13 of the slit die 101 becomes the positioning element consisting of the flat block 110, the shim 111, and the bolt 20 and the positioning element.
- the lip gap 13 is uniformly adjusted in the longitudinal direction.
- FIG. 5 shows another embodiment of the slit die of the present invention.
- the slit die 102 connects the first lip 3, the second lip 2, and the first lip 3 similarly to the embodiment shown in FIG. A first block 4 and a second block 5 to be configured, and a bolt 8 and a nut that engage and fasten the first block 4 and the second block 5 Consists of nine.
- the slit die 102 has a lip gap 13, a discharge port 14, and a manifold 12, similarly to the embodiment shown in FIG.
- the slit die 102 is, similarly to the embodiment shown in FIG. 2, the inner surface 17 of the second lip 2 facing the inner surface 15a of the first block 4. a and the inner surface 17 b of the second lip 2 forming the lip gap 13 are located on substantially the same plane.
- the slit die 102 is replaced with a flat block 110 and expansion / contraction means 1 12 (in place of the step block 10 shown in FIG. 2).
- Auxiliary means The inner surface 110a of the flat block 110 consists of a single plane.
- the inner surface 110a is in contact with the outer surface 16b of the second block 5.
- the expansion / contraction means 112 is interposed in the gap between the outer surface 16a of the first block 4 formed by the step and the inner surface 110a of the flat block 110.
- the expansion / contraction means 112 includes, for example, a micrometer head or a linear actuator.
- the expansion and contraction means 112 is fixed to the upper part of the flat block 110.
- the expansion / contraction member 1 1 2 a of the expansion / compression means 1 1 2 projects from the inner surface 1 10 a of the flat block 1 10 to the first block 4 side, and the tip thereof is the first block. It is pressed against the outer surface 16a.
- the protruding length of the telescopic member 112a from the inner surface 110a of the flat block 110 to the outer surface 16a of the first block 4 is determined by the gap width Lg of the lip gap 13 It has been adjusted to be.
- Fine adjustment of the step H between the first block 4 and the second block 5 is performed by finely adjusting the protrusion length of the elastic member 1 12 a of the elastic means 1 12. Is performed.
- the gap width Lg of the lip gap 13 of the slit die 102 becomes the positioning element composed of the flat block 110, the expansion / contraction means 112, and the bolt 20.
- the lip gap 13 is uniformly adjusted in the longitudinal direction by the fixing element and the positioning element.
- the method for measuring the step difference H is not particularly limited as long as the method can accurately measure with the required resolution.
- two linear gauges which are pressed at right angles to a uniform surface, such as a precision surface plate, and set the zero point, are respectively connected to the inner surface 15a of the first block 4 and the inner surface of the second block 5. While pressing at a right angle to 15b, read the value displayed on the other linear gauge when one linear gauge displays zero. This method is preferable because the measurement can be performed with high accuracy and simpleness.
- the lip gap accuracy refers to the gap width of the lip gap (for example, the gap width Lg in FIG. 2) over multiple points in the longitudinal direction of the lip gap. Defined as the maximum deviation of the measured value.
- the discharge port for example,
- the gap width of the discharge port is measured, and this is used as the gap width of the lip gap. preferable.
- the first and second procks 4 and 5 having the same thickness Lt are used.
- the method of forming the step H is not limited to this.
- FIG. 6 shows an example of another method of forming the step H.
- the slit die 103 of the present invention has a first lip 3, a second lip 2, and a first lip similarly to the embodiment shown in FIG.
- the first block 4a and the second block 5a constituting the block 3 are engaged with and fastened to the first block 4a and the second block 5a. 8 bolts and 9 nuts.
- the slit die 103 has a lip gap 13, a discharge port 14, and a manifold 12, similarly to the embodiment shown in FIG.
- the slit die 103 is, similarly to the embodiment shown in FIG. 2, the inner surface 1 of the second lip 2 facing the inner surface 15a of the first block 4a. 7a and the inner surface 17b of the second lip 2 forming the lip gap 13 are substantially coplanar.
- the first block 4 a and the second block 5 a in the slit die 103 are formed by the inner surface of the second block 5 a forming the lip gap 13. Different thickness in the direction perpendicular to 15b.
- the slit dies 103 differ from the slit dies 1, 101 and 102 shown in FIGS.
- the first block 4a has a thickness Lta
- the second block 5a has a thickness Ltb. Due to the difference between the thickness Lta and the thickness Ltb, the step HI between the inner surface 15a of the first block 4a and the inner surface 15b of the second block 5a is determined. Is formed.
- the number of steps H (H 1) forming the lip gap 13 having the gap width L g is not limited to one as in the above embodiment. Two or more steps may be formed in the first lip 3 by overlapping three or more blocks.
- the first lip 3 is composed of two blocks, a first block 4 (4a) and a second block 5 (5a).
- first block 4 (4a)
- second block 5 (5a)
- Each of the first lip 3 and the second lip 2 is formed by a plurality of blocks vertically and a configuration in which the relative position of each block can be adjusted. good.
- Simultaneous multi-layer coating in which two or more rip gaps are formed by three or more rips The slit die of the present invention can be applied to a slit die for fabric.
- the method of forming the lip gap 13 is not limited to a form formed by a step formed between a plurality of blocks.
- FIG. 7 shows an example of another step formation.
- the slit die 104 of the present invention has a first lip 3, a second lip 2, and a first lip similarly to the embodiment shown in FIG.
- the first block 4 and the second block 5 that form the loop 3, and the port that engages and fastens the first block 4 and the second block 5 It consists of 8 and 9 nuts.
- the slit die 104 has a lip gap 13, a discharge port 14, and a manifold 12, similarly to the embodiment shown in FIG.
- the slit die 104 has a positioning element consisting of a flat block 111 as in the embodiment shown in FIG.
- the inner surface 1 1 1a of the flat block 1 1 1 consists of a single plane.
- the inner surface 11 a contacts the outer surface 16 a of the first block 4 and the outer surface 16 b of the second block 5.
- a lip gap 13 is formed with the inner surface 17 a of the second lip 2 facing the inner surface 15 a of the first block 4.
- the inner surface 17 b of the second lip 2 is located substantially on the same plane.
- the slit die 104 there is no step between the inner surface 15a of the first block 4 and the inner surface 15b of the second block 5, and both inner surfaces 15a and 15b are located on the same plane.
- the slit die 104 differs from the embodiments shown in FIGS. 2, 4, 5, and 6.
- the slit die 104 has a gap between the inner surface 17a of the second lip 2 and the inner surface 15a of the first block 4. This gap is filled with shims 113. Shim 113 is set between first lip 3 and second lip 2 when assembling slit die 104. After that, it is fastened and fixed by the first block 4 and the second lip 2. A step H2 is formed by the shims 113.
- FIG. 8 shows still another embodiment of the slit die of the present invention.
- the slit die 105 in FIG. 8 replaces the shim 113 in the slit die 104 in FIG. 7 and has a thickness corresponding to the thickness of the shim 113.
- the inner surface 17a of the second lip 2 protrudes in the direction of the inner surface 15a of the first block 4, and the inner surface 17a is brought into contact with the inner surface 15a. As a result, a step H 3 is formed.
- the structure of the other part of the slit die 105 is the same as that of the slit die 104 in FIG.
- a lip gap can be formed by a combination of a pair of lips, and at least one of the lips is independent of at least one lip. Consisting of two blocks, the relative positioning between the blocks provided for the block and the fixed elements of this positioning element reduce the gap width of the lip gap. It is essential that the structure be able to correct the gap in the longitudinal direction of the gap. That is, as long as this structure is satisfied, the individual components and their combinations may be in any form.
- the relative position between the first block 4 and the second block 5 constituting the first lip 3 is set to a small step on the flat block 111. It can be done by providing.
- the manifold 12 inside the slit die 1 may be provided on the first lip 3 instead of the second lip 2, or the first lip 3 It may be provided on both the third and second rips 2.
- the front shape of the manifold 12 is as follows. It may be a T-shape extending in the left-right longitudinal direction around the supply port 11 or a coat hanger type inclined in the left-right longitudinal direction around the coating liquid supply port 11.
- the manifolds 12 are not limited to one, and may be provided in a plurality of stages in the application liquid discharge direction.
- the manifold 12 may be penetrated at both ends in the longitudinal direction of the lip. In this case, regulation of the discharge width of the coating liquid and sealing of the liquid leakage are performed by side plates attached to both ends in the longitudinal direction of the rip.
- the application liquid supply means may be a known one.
- a gear pump, a mono pump, a diaphragm pump, or a syringe pump is used as the application liquid supply means.
- a well-known filter or pulp is provided in the coating liquid flow path between the coating liquid supply means and the slit diy 1 as necessary.
- the material of the lip is not particularly limited.
- the material include cemented carbide, ceramics, stainless steel, or a material obtained by applying a surface treatment to these materials.
- Stainless steel is preferred as a material because it has chemical resistance and is inexpensive.
- the length LA of the tip 18 of the second lip 2 and the length LB of the tip 19 of the first lip 3 shown in FIG. 2 depend on the direction in which the coating film is formed. , Each length is set. For example, when the member to be coated relatively moves from the second lip 2 toward the first lip 3, and a coating film is formed on the downstream side of the second lip 3,
- the length LA of the tip 18 of the second lip 2 is preferably between 0.1 mm and 15 mm, more preferably between 0.5 mm and 5 mm.
- the length LB of 19 is preferably between 0.03 mm and 2 mm, more preferably between 0.05 mm and lmm, and the length of the tip 19 of the first lip 3 It is desirable that LB be set to be shorter than the length LA of the tip 18 of the second lip 2.
- the straightness in the longitudinal direction of the tip 18 of the second lip 2 and the tip 19 of the first lip 3, that is, the magnitude of the undulation in the longitudinal direction when viewed macroscopically is preferably ⁇ ⁇ or less, more preferably the following.
- the surface roughness of the liquid contact surface at the maximum height (Ry) is preferably 0.4 S or less, more preferably 0.2 S or less. It is more preferable that the tip 18 of the second lip 2 and the tip 19 of the first lip 3 are finished with 0.1 S or less in order to improve coating quality.
- FIG. 9 is a schematic perspective view of a coating apparatus (die coater) using the slit die of the present invention for performing the method of manufacturing a substrate having a coating film of the present invention.
- FIG. 10 is a schematic configuration diagram showing the die coater of FIG. 9 including a coating liquid supply system.
- FIG. 9 shows a coating apparatus (die coater) 21 for applying a coating liquid to a single-wafer substrate (member to be coated) such as a glass substrate to form a coating film.
- the die coater 21 has a base 22.
- a pair of guide groove rails 24 is provided on the base 22, and the guide groove rails 24 are provided with a stage.
- stage 26 are arranged.
- the upper surface of stage 26 is a suction surface.
- the stage 26 is reciprocally movable in a horizontal direction on a guide groove rail 24 via a pair of slide legs 28.
- a casing 32 extending along the guide groove rails 24 is arranged between the pair of guide groove rails 24, and the casing 32 has a built-in feed mechanism.
- the feed mechanism has a feed screw 34 made of a ball screw as shown in FIG.
- the feed screw 34 is a connector having a nut-like portion fixed to the lower surface of the stage 26.
- a method in which the stage 26 reciprocates is employed, but the present invention is not limited to this, and a method in which the slit die 1 reciprocates with respect to the stage 26 may be employed. The point is that at least one of the stage 26 and the slit die 1 should reciprocate.
- An inverted L-shaped sensor support 40 is disposed on one end of the upper surface of the base 22.
- the tip of the sensor support 40 extends to above one of the guide groove rails 24, and the motor-operated lifting actuator 41 is attached thereto.
- a thickness sensor 42 is attached to the lifting actuator 41 so as to face downward.
- a laser displacement gauge, an ultrasonic thickness gauge, or the like is used, and a sensor using a laser is particularly preferable.o
- a die support 44 having an inverted L-shape is arranged at a position closer to the center of the base 22 than the sensor support 40, similarly to the sensor support 40.
- the tip of the die support 44 is located above the pair of guide groove rails 24, that is, above the reciprocating path of the stage 26.
- An elevating mechanism 46 is attached to the tip of the die support 44.
- the lifting mechanism 46 has a lifting bracket.
- the lifting bracket is attached to a pair of guide rods so as to be movable up and down.
- a feed screw composed of a ball screw is arranged between these guides. The feed screw is screwed into a nut of the lifting bracket, and penetrates through the nut. Extending.
- An AC servomotor 50 is connected to the upper end of the vein screen, and the AC servomotor 50 is attached to the upper surface of the casing 48.
- the guide rod feed screw described above is housed in a casing 48, and is rotatably supported via a bearing.
- a die holder 52 composed of a flat plate and side plates provided at both ends of the flat plate is rotatably mounted in a vertical plane by a support shaft (not shown). The die holder 52 extends horizontally between the guide groove rails 24 above the pair of guide groove rails 24.
- a horizontal par 56 is fixed to the lifting bracket at a position above the die holder 52, and the horizontal par 56 extends along the die holder 52.
- Motorized adjustment actuators 58 are attached to both ends of the horizontal par 56, respectively.
- the adjustment actuator 58 has an extensible port protruding from the lower surface of the horizontal par 56, and the lower ends of these extension ports are in contact with both ends of the die holder 52.
- the slit die 1 of the present invention is mounted in the die holder 52.
- a supply hose 62 for the coating solution 90 extends from the slit die 1, and the tip of the supply hose 62 is connected to the electromagnetic pump in the syringe pump 64.
- a suction hose 68 extends from the suction port of the solenoid-operated switching valve 66, which is connected to the supply port of the switching valve 66. The tip of the suction hose 68 is coated with the coating liquid 90. Is inserted in the tank 70 storing
- the pump body 72 of the syringe pump 64 can be selectively connected to one of the supply hose 62 and the suction hose 68 by the switching operation of the electromagnetic switching valve 66.
- the electromagnetic switching valve 66 and the pump body 72 are electrically connected to a computer 74, and control from the computer 74 is performed. In response to a control signal, their operation is controlled.
- the computer 74 is also electrically connected to a lifting actuator 41 and a thickness sensor 42.
- the computer 74 is also electrically connected to the sequencer 76 to control the operation of the syringe pump 64.
- the sequencer 76 controls the operation of the AC servo motor 38 of the feed screen 34 on the stage 26 side and the AC servo motor 50 of the lifting mechanism 46 in sequence.
- the sequencer 76 has a signal indicating the operating state of the AC servomotors 38 and 50, a signal from the position sensor 78 for detecting the moving position of the stage 26, and a sensor for detecting the operating state of the slit die 1. (Not shown) is input.
- the sequencer 76 outputs a signal indicating the sequence operation to the computer 74.
- an encoder can be built into the AC servomotor 38, and the position of the stage 26 can be detected by the sequencer 76 based on the pulse signal output from this encoder. It is. It is also possible to incorporate control by the computer 74 into the sequencer 76.
- the die 21 is provided with a sheet substrate as a member to be coated on the stage 26, for example, a loader for supplying a glass substrate A for a color filter, and a stage 26.
- An unloader is provided for removing the glass substrate A.
- a cylindrical coordinate system industrial port can be used as a main component.
- the slit die 1 extends horizontally in the direction perpendicular to the reciprocating direction of the stage 26, that is, in the width direction of the stage 26. It extends and both ends are supported by the die holder 52.
- the horizontal adjustment of the slit die 1 is performed by extending and retracting the expansion and contraction apertures of the adjustment actuator 58 provided at both ends of the horizontal par 56, and rotating the die holder 52 around its support shaft.
- stage 26 is positioned below thickness sensor 42. Also, at this stage, the liquid flows from the tank 70 through the suction hose 68 and the supply hose 62 to the manifold 12 and the lip gap 13 in the slit die 1. The coating solution 90 is filled in the passage. Further, at this stage, as an application preparation operation, the electromagnetic switching valve 66 of the syringe pump 64 is switched so that the pump body 72 is connected to the suction hose 68 side.
- the electromagnetic switching valve 66 of the syringe pump 64 is switched to connect the pump body 72 to the supply hose 62.
- the glass substrate A is supplied onto the stage 26 from a loader (not shown), and the glass substrate A is held on the stage 26 by receiving a suction pressure.
- the loading of the glass substrate A is completed in this way.
- the glass substrate A is substantially the same as the discharge width of the discharge port 14 of the slit die 1, that is, the distance Lw between the sealing plates 6a and 6b, or is substantially the same. Also have a wide width dimension.
- the thickness sensor 42 descends to a predetermined position, and the thickness of the glass substrate A is measured by the thickness sensor 42. Is done. After the measurement, the thickness sensor 42 rises to the original position.
- the stage 26 moves toward the slit die 1 and stops just before the slit die 1. Thereafter, the slit die 1 descends, and a predetermined clearance, for example, a gap of 100 ⁇ m is secured between the lower surface of the slit die 1 and the upper surface of the glass substrate A.
- the clearance is measured from a distance sensor (not shown) that measures the distance between the stage 26 and the slit die 1 in consideration of the thickness of the glass substrate A measured by the thickness sensor 42. Based on the output signal, the descending position of slit die 1 is positioned and set accurately.
- stage 26 is further moved, and when the start line to start the coating film formation is positioned directly below the discharge port 14 of the slit die 1 on the upper surface of the glass substrate A. Then, the stage 26 is temporarily stopped.
- the syringe pump 64 starts the discharge operation of the coating liquid 90 and supplies the coating liquid 90 to the slit die 1.
- the coating liquid 90 is discharged onto the glass substrate A from the discharge port 14 of the slit die 1.
- the gap of the discharge port 14 is constant along the longitudinal direction of the slit die 1, that is, the direction perpendicular to the reciprocating direction of the stage 26, the discharge port 14 Then, the coating liquid 90 is discharged uniformly along the start line of the glass substrate A.
- a liquid reservoir C of a coating liquid called a bead is formed along the start line.
- the coating film D of the coating solution 90 is continuously formed on the upper surface of the glass substrate A.
- the movement of stage 26 must be stopped Alternatively, the coating liquid 90 may be discharged from the discharge port 14 at a timing when the start line of the glass substrate A passes through the discharge port 14 of the slit die 1.
- the suction operation of the syringe pump 64 is slightly performed, whereby the slit die 1 is reset.
- the coating solution 90 in the gap 13 is sucked into the manifold 12.
- the ⁇ die 1 rises to its original position, and the application of the coating liquid 90 by the slit die 1 is completed.
- a discharge operation is given to the syringe pump 64 by the same amount as the suction operation so that no air remains in the lip gap 13 of the slit die 1.
- the electromagnetic switching valve 66 of the syringe pump 64 is switched so as to connect the pump body 72 to the suction hose 68, and the pump body 72 receives the application liquid in the tank 70 from the suction hose. 6 Perform the suction operation to suction through 8.
- the electromagnetic switching valve 66 of the syringe pump 64 is switched to connect the pump body 72 to the supply hose 62.
- stage 26 waits for a new glass substrate to be loaded.
- the coating liquid 90 used for forming the coating film is not particularly limited as long as it is a liquid having fluidity. Examples thereof include a coating liquid for coloring, a coating liquid for resist, a coating liquid for surface protection, and an antistatic liquid. Coating liquid for lubrication or coating liquid for lubrication.
- As the coating liquid a solution in which an inorganic material such as a polymer material, glass, or a metal is dissolved or dispersed in water or an organic solvent is often used.
- the viscosity of the coating solution 90 used is preferably from ImPas to 100,000 mPa ⁇ s, and more preferably from 5 mPas to 500,000 mPas. P a ⁇ s. Newtonian is preferred from the viewpoint of coating properties, but a coating solution having thixotropy can also be used.
- a metal plate such as aluminum, a ceramic plate, a silicon wafer, or the like may be used in addition to glass.
- the application conditions used are preferably clear (for required ones) preferably between 20 / m and 500 im, more preferably between 50 m and 400 / im
- the coating speed is preferably 0.1 to 50 mZ, more preferably 0.5 to 10 m
- the lip gap is preferably 30 to 30 mZ.
- the coating thickness is preferably 3 / xm to 500 / zm, more preferably 5 tm To 300 / m.
- the method for producing a substrate having a coating film according to the present invention comprises: It is preferably used.
- Display members include color filters used in liquid crystal displays, and rear and front panels of plasma displays.
- a single-wafer substrate such as a glass substrate
- a long web a long member to be applied
- the slit die 1 of the present invention is brought close to the portion where the roller is supported and transported by a roll, and the coating liquid is discharged from the discharge port 14 of the slit die 1 onto the web.
- FIG. 14 is a schematic front sectional view of an example of a coating apparatus used for carrying out the method for producing a substrate having a coating film of the present invention
- FIG. 15 uses the coating apparatus of FIG. 16A and 16B are plan views illustrating the formation of a coating film on a substrate
- FIG. FIG. 4 is a schematic perspective view for explaining the state of formation of a bead between a die and a substrate.
- the coating apparatus (die coater) 501 includes a base 502, and a pair of guide rails 504 is provided on the base 502.
- a stage 506 is arranged on the guide rail 504.
- the stage 506 is driven by a linear motor (not shown) and reciprocates freely in the direction of the arrow X.
- the upper surface of the stage 506 is a vacuum suction surface composed of suction holes, and can hold the substrate B as a member to be coated by suction.
- a gate-shaped column 5110 In the center of the base 502, there is a gate-shaped column 5110. On both sides of the support post 5 1 0 is provided with a vertical lifting Yuni' preparative 5 7 0, c where scan Li Tsu dynamical 5 2 0 of the present invention to carry out the coating in a vertical lifting device Yuni' preparative 5 7 0 is attached
- the slit die (die) 52 is a front-lip extending in a direction perpendicular to the arrow X direction, that is, a direction perpendicular to the plane of the paper, and a rear-rip 52 Are overlapped in the X direction and are integrally connected by a plurality of connecting bolts (not shown).
- the front trip 5 2 2 is composed of two blocks with different thicknesses stacked one on top of the other, and the outer surface side is positioned in the horizontal direction (X direction) by the positioning block 5 32. Have been.
- the positioning block 5332 is fixed to two blocks constituting a front strip 522 by a fixing element (not shown) of the positioning block 5332. .
- a manifold 526 is formed in the center of the die 520, and the manifold 526 also extends in the longitudinal direction of the die 520 (horizontal direction orthogonal to the X direction).
- ⁇ A lip gap (slit) 528 is formed below the manifold 526 so as to communicate therewith.
- This slit 528 also extends in the longitudinal direction of the die 520, and its lower end is opened at the discharge port surface 536 which is the lowermost surface of the die 520, and the discharge port 533 is formed.
- Form 4 The gap width (slit width) of slit 528 (measured in the X direction) is equal to the difference in thickness between the two blocks that make up the front rip 522 .
- the vertical unit 570 that raises and lowers the die 520 is a pair of left and right lifting units that raise and lower the suspension holder 580 that holds the die 520 in a suspended form.
- the vertical lifting unit 570 has a pair of left and right sides to support both ends in the longitudinal direction of the die 520, and each can be raised and lowered independently.
- the tilt angle can be set arbitrarily.
- the discharge port surface 536 of the die 5 It can be almost parallel in the direction.
- this vertical unit has a pair of left and right sides to support both ends in the longitudinal direction of the die 520, and each can be raised and lowered independently.
- the tilt angle can be set arbitrarily.
- the discharge port surface 536 of the die 5 It can be almost parallel in the direction.
- this vertical unit 570 has a pair of left and right sides to support both ends in the longitudinal direction of the die 520, and each can be raised and lowered independently.
- the tilt angle can be set arbitrarily.
- the discharge port surface 536 of the die 5 It can be almost parallel in the direction.
- this vertical unit has a pair of left and right sides to support both ends in the longitudinal direction of the die 520, and each can be raised and lowered independently.
- a clearance of any size can be provided between the substrate B on the stage 506 and the discharge port surface 536 of the die 520.
- a wiping unit 590 is mounted on a guide rail 504 at the right end of the base 502 so as to be movable in the X direction.
- the wiping unit 590 is provided with a wiping head 592 having a shape to be engaged with the periphery of the discharge port 534 of the die 520 through a bracket 594 via a slider 596. Attached to.
- the slider 596 is freely moved by the drive unit 598 in the longitudinal direction of the die 52, that is, in the horizontal direction perpendicular to the X direction.
- the drive unit 598 and the tray 600 are fixed on a carriage 600.
- the trolley 602 is on the guide rail 504 and guided by the guide rail 504, and can be freely reciprocated in the X direction by a linear motor (not shown), so that the entire wiping unit 590 is provided. Can reciprocate in the X direction.
- a linear motor not shown
- move the entire unit 590 in the X direction lower the die 520, and engage the wiping head 592.
- driving the drive unit 598 and sliding the wiping head 592 in the longitudinal direction of the die 520 the coating remaining in the vicinity of the discharge port of the die 520 is obtained. Liquid 5 6 6 Other contaminants can be removed and cleaned.
- the removed coating solution 566 and others are collected in a tray 600.
- tray 600 The removed coating solution 566 and others are collected in a tray 600.
- Reference numeral 600 is connected to a discharge line (not shown) so that the liquid such as the coating liquid 566 accumulated inside can be discharged and collected to the outside.
- the tray 600 can also be used to collect the coating liquid 566 discharged from the die 520 by bleeding air or the like.
- the wiping head 592 is preferably made of an elastic material such as rubber or a synthetic resin so that the wiping head 592 can be uniformly engaged with the die 520.
- a thickness sensor 62 for measuring the thickness of the substrate B is attached to the support 62. It is preferable that the thickness sensor 62 uses a laser. By measuring the thickness of the substrate B with the thickness sensor 620, the thickness of the discharge port surface 536 of the die 520 and the substrate B can be measured regardless of the thickness of the substrate B.
- the clearance which is the gap, can be kept constant.
- the upstream side of the manifold 526 of the die 520 is always connected to a supply hose 560 connected to the coating liquid supply device 540 via an internal passage (not shown).
- the coating liquid can be supplied from the coating liquid supply device 540 to the manifold 526.
- the coating solution 566 that has entered the manifold 526 flows evenly and widened in the longitudinal direction of the die 520, and is discharged from the discharge port 534 via the slit 528. You.
- the coating liquid supply unit 540 is equipped with a supply pulp 542, a syringe pump 550, a suction pulp 544, a suction hose 562, and a tank 564 on the upstream side of the supply hose 560. I have.
- the coating solution 566 is stored in the tank 564, and is connected to the compressed air source 568 so that an arbitrary amount of back pressure can be applied to the coating solution 566.
- the coating solution 566 in the tank 564 is supplied to a syringe pump 550 through a suction hose 562.
- the syringe pump 550 has a pump body 556 composed of a syringe 552 and a piston 554.
- the piston 554 can freely reciprocate up and down by a drive source (not shown).
- the syringe pump 550 fills the syringe 552 having a fixed inner diameter with the coating solution 566, extrudes it with the piston 554, and feeds it to the die 520.
- the syringe pump 550 is a constant-volume pump that supplies an amount of application liquid 566 corresponding to an amount required for applying one substrate B by one operation.
- control device 700 According to an automatic operation program incorporated in the control device, a control command signal is transmitted to each device to perform a predetermined operation. When changing the conditions, by inputting appropriate change parameters to the operation panel 700, the change parameters are transmitted to the control device 700, and the change of the operation can be realized.
- each moving unit moves to the standby position. That is, the stage 506 moves to the left end (the position shown by the broken line) in FIG. 14, and the die 520 moves to the top.
- the wiping unit 590 is moved so that the tray 600 is in the lower position of the die 520.
- the coating liquid flow path from the tank 564 to the die 520 is already filled with the coating liquid 566, and the work for discharging the residual air inside the die 520 has already been completed. It is assumed that
- the state of the coating liquid supply device 540 is set to
- suction valve 5 4 4 is closed, supply valve 5 4 2 is open
- the toner 554 is located at the lowermost position, so that the coating liquid 566 can be supplied to the die 520 at any time.
- lift pins (not shown) are raised with respect to the surface of the stage 506, and a substrate B is placed on the lift pins from a loader (not shown).
- the lift pins are lowered, and the substrate B is placed on the upper surface of the stage 506, and is simultaneously held by suction.
- the coating liquid supply device 540 is operated to discharge a small amount of the coating liquid 566 toward the tray 600, and then the wiping head 592 is discharged from the die 520.
- the wiping unit 590 moves the wiping unit 590 so that it is directly below the outlet 5 34.
- the die 520 is lowered, and the discharge port surface 536 of the die 520 is engaged with the wiping head 592.
- the wiping head 592 is inserted into the longitudinal direction of the die 520.
- the wiping unit 590 returns to its original position (the right end in Fig. 14).
- the coating liquid supply device 540 is operated, and a certain amount of the coating liquid 566 is discharged from the discharge port 534 of the die 520.
- the amount of the applied liquid 566 ejected is very small, it does not fall downward from the outlet 534, but remains in the form of hanging on the outlet 534 and the surrounding outlet surface 536. You.
- the coating solution 5666 is pushed out of the discharge port 534.
- the coating liquid 566 discharged from the discharge port 534 has a property of flowing along the discharge port 534 in the longitudinal direction of the discharge port 534, so that there is a gap in the slit 528.
- the gap portion is eliminated by the flow of the coating solution 566 transmitted in the longitudinal direction, and the lower portion of the discharge port 534 is connected in the longitudinal direction. Filled with coating solution 5 6 6. The amount of dripping from the discharge port 5 3 4 of the coating solution 5 6 6 connected at the bottom of this discharge port 5 3 4 Due to the effect of surface tension, the die is made uniform over the longitudinal direction.
- the discharge amount from the discharge port 534 here will be described with reference to Fig. 17.
- the surface including the discharge port 534 of the die 5200 that is, the discharge surface
- the length in the application direction of 536 is L s
- the length in the longitudinal direction of the die 5200 of the discharge port 534 is W
- the clearance between the discharge port surface 536 described later and the substrate B is clear.
- the discharge amount at this time is preferably 5% to 100% of the volume represented by SIXLsXW, and more preferably 10% to 50% of the same volume.
- the range of the ratio ⁇ 1 is expressed as 0.05 5 ⁇ ⁇ 1 ⁇ 1.0.
- the coating liquid 566 is discharged from the discharge port 534, and the amount of movement in the longitudinal direction is small, and the moving speed is low. It is virtually impossible to eliminate voids. If the discharge rate is larger than this range, the coating liquid 566 overflows from the clearance formed between the discharge port surface 536 and the substrate ⁇ , and the film thickness of the coating film at the start of coating is reduced. It will be thicker than allowed.
- This time (standby time) is required for the discharged coating liquid 566 to hang down from the discharge port 534 and be made uniform in the longitudinal direction of the die 520 by the effect of surface tension.
- the waiting time is preferably between 0.1 and 10 seconds, more preferably between 0.3 and 3 seconds. If the length is shorter than this, the uniformity is not obtained. If the length is longer than this, the tact time is significantly increased, which is not preferable.
- the movement of the stage 506 is started.
- the thickness of the substrate ⁇ passing under the thickness sensor 62 0 is measured.
- the movement of the stage 506 is stopped when the coating start portion 801 of the substrate ⁇ reaches just below the discharge port 534 of the die 520.
- the discharge port surface 536 of the filter 52 is brought close to a position where a predetermined size of clearance with respect to the substrate B is secured.
- the measured thickness data of the substrate B is used for setting the clearance.
- the biston 554 of the syringe pump 550 is raised at a predetermined speed, and after the coating liquid 566 is discharged from the die 520 for a certain period of time, the movement of the stage 506 is started at the predetermined speed. Then, the application of the coating solution 566 to the substrate B is started to form a coating film.
- the piston 5 5 4 is stopped and the supply of the coating solution 5 6 6 is stopped.
- the lifting unit 570 is driven to raise the die 520. Thereby, the bead formed between the substrate B and the die 520 is cut off, and the coating is completed.
- the stage 506 continues to move, stops when it reaches the end point, releases the suction of the substrate B, raises the lift pins, and lifts the substrate B. At this time, the lower surface of the substrate B is held by an unloader (not shown), and the substrate B is transported to the next step.
- the stage 506 After transferring the board B to the unloader, the stage 506 lowers the lift pin and returns to the home position. After returning to the origin position of the stage 506, the wiping unit 590 is moved so that the tray 600 is positioned below the discharge port 534 of the die 520.
- the syringe pump 550 is operated, and a small amount of the coating liquid 566 of IOL to 500 / ZL is sent to the die 520, and the void remaining inside the die 520 is removed by the coating liquid 550. 6 Fill with 6.
- the suction pulp 544 in the syringe pump 550 is opened, the supply pulp 542 is closed, the piston 554 descends at a constant speed, and the tank 5 Filling the syringe 5 52 with the coating solution 5 6 6 Is done.
- the piston 554 is stopped, the suction pulp 544 is closed, the supply valve 542 is opened, and the apparatus waits until the next new substrate B comes. The same operation is repeated for each new substrate B.
- a small amount of a coating liquid 566 is discharged from the discharge port 534 of the die 520 before starting the coating, and the coating liquid 566 is formed. Therefore, after forming a state in which no gap is formed in the vicinity of the discharge port 5 3 4 in the slit 5 2 8, the coating is started.
- the formation state of the coating film 102 in FIG. 1 is uniform without having a film break 803 as shown in FIG. 16B.
- the formation state of the coating film 802 at the application start portion 801 of the substrate B is as follows. There may be a state in which the film has a film breakage. If the application is continued in this state, the film break 803 will form a streak defect 804.
- the wiping head 592 of the elastic body is engaged with the vicinity of the discharge port 534 of the die 5200 and is slid, so that the vicinity of the discharge port 534 of the die 520 is formed.
- a method of wiping the vicinity of the discharge port 5334 of the die 52 with a cloth material or a cloth material moistened with a solvent may be used.
- the coating liquid 566 is filled in the coating liquid flow path from the tank 564 to the die 520, and the stage 506, the die 520, Until the wiping unit 590 is arranged at the position of the stamp, the method is exactly the same as the method for producing a substrate having a coating film described above using the die coater 501 in FIG.
- the vertical lifting unit 570 is driven, and the clearance between the discharge port surface 536 of the die 52 and the substrate B is determined in advance.
- the die 520 is lowered to the first lowered position so that the first clearance is obtained.
- the syringe pump 550 is driven to discharge a certain amount of the coating liquid 566 from the discharge port 534 of the die 520 to form a bead.
- the die 520 is moved up and down to the second lowered position so that the clearance between the discharge port surface 536 of the die 520 and the substrate B becomes the second clearance.
- the second clearance is set to maintain the bead once formed.
- the piston 554 of the syringe pump 550 is raised at a predetermined speed, the coating liquid 566 is discharged from the die 520, and after a certain period of time, the bead is formed into a predetermined size. After a long time, the movement of the stage 506 is started at a predetermined speed, and the application of the coating solution 566 to the substrate B is started, and a coating film is formed on the substrate B.
- the discharge of the coating solution 566 from the die 520 and the start of the relative movement between the stage 506 and the die 520 may be performed at the same time.
- the relative movement may be started earlier.
- the piston 5554 is stopped, and the supply of the coating solution 5666 is stopped.
- a so-called squeegee coating state in which part of the coating liquid remaining between the discharge port surface 536 of the die 52 and the substrate B is transferred to the substrate B as the substrate B moves.
- the vertical lifting unit 570 is driven to raise the die 520. Thereby, the bead formed between the substrate B and the die 502 is cut off, and the coating is completed.
- the stage 506 continues to operate, and when it reaches the end point, stops, releases the suction of the substrate B, raises the lift pins, and lifts the substrate B. At this time, the lower surface of the substrate B is held by an unloader (not shown), and the substrate B is transported to the next step. After transferring the substrate B to the unloader, the stage 506 lowers the lift pin and returns to the home position. After returning to the home position of the stage 506, the wiping unit 590 is moved so that the tray 600 is positioned below the discharge port 534 of the die 520.
- the syringe pump 550 is operated, and a small amount of the coating liquid 566 from IO ⁇ L to 500 / xL is sent to the die 520, and the void remaining inside the die 520 is applied. Fill with liquid 5 6 6.
- the syringe pump 550 is operated to fill the syringe 552 with the coating solution 566.
- the piston 554 is stopped, the suction pulp 544 is closed, the supply pulp 542 is open, and waiting until the next new substrate B comes. I do. The same operation is repeated for each new substrate B.
- the first clearance is between 20 / xm and 200 / m
- the second clearance is preferably ⁇ ⁇ ⁇ 30 / 3m.
- the coating liquid 566 is discharged from the discharge port 534 of the die 520, and thereby the discharge of the slit 528 is performed. Even if there is a minute gap near the outlet 5 34, (a) the gap is pushed out of the discharge port 5 34, and (b) the coating solution 5 6 6 discharged from the discharge port 5 3 4 Due to a kind of capillary phenomenon, it flows along the clearance formed between the discharge port surface 536 and the substrate B: in the longitudinal direction of the die 52. As a result, the gap of the slit 528 is pushed out by the coating liquid 566, and a gap is temporarily formed in the clearance between the discharge port surface 536 near the discharge port 534 and the substrate B.
- the discharge amount from the discharge port 534 is described with reference to FIG. 17.
- the discharge amount at this time is preferably 5% to 100% of the volume V, and more preferably 10% to 50%. Assuming that the ratio to the volume V is ⁇ 2, the range of the ratio ⁇ 2 is expressed as 0.05 5 ⁇ ⁇ 2 ⁇ 1.0.
- a bead 63 connected with the coating liquid 566 is formed between the discharge port surface 536 and the substrate ⁇ ⁇ by the discharge amount of the coating liquid 566 defined by this. If the discharge amount of the coating solution 5 6 6 is smaller than this range, the speed at which the coating solution 5: 66 flows in the longitudinal direction of the die becomes extremely slow due to the capillary phenomenon, and the coating is performed. Tact time is also slow. On the other hand, if it is larger than this range, the coating solution 566 flows faster in the longitudinal direction of the die 520, and the time for discharging the void is greatly reduced, but on the other hand, the discharge port surface 536 The coating solution 566 may protrude from the gap formed on the substrate B, and the subsequent coating may not be performed normally.
- the substrate B may collide with the discharge port surface 536 due to the uneven thickness of the substrate B. If the first clearance is larger than the above range, the speed at which the coating liquid 566 travels by moving through the gap formed between the substrate B and the discharge port surface 536 by capillary action. In some cases, the gap becomes extremely small, and in a short time, the gap is eliminated by the coating solution 566, so that it may become impossible to form a bead by connecting the coating solution 566. Further, if the second clearance is smaller than the above range, the shearing force acting on the coating solution 566 during coating increases, and defects such as film breakage may occur during coating. If the second clearance is larger than the above range, the bead formed in the first clearance is cut, and the coating liquid 5 6 6 is not applied to the coating start portion 8 0 1 Film breakage 803 may occur.
- the size of the first clearance may be the same as the size of the second clearance, but the size of the first clearance may be the same as the size of the second clearance. Smaller than the size of the lens is more preferable.
- the size of the first clearance is smaller than the size of the second clearance, the die longitudinal direction due to the capillary effect on the coating solution 566 discharged from the discharge port 534
- the flow rate of the application liquid 566 increases, and the second clearance increases, so that the clearance formed between the discharge port surface 536 and the substrate B is allowed.
- the upper limit of the coating liquid ejection amount increases, and the operation margin for controlling the film thickness of the coating start part 801 increases, It becomes easier to control the thickness of the coating start part 8001.
- the allowable capacity of the pool of the coating liquid 566 formed in the clearance between the discharge port surface 536 and the substrate B is reduced.
- the excess coating solution 566 overflows, which may cause inconvenience such as soiling the portion of the substrate B to which no coating is applied.
- the second clearance can be set.
- This waiting time is preferably between 0.1 and 10 seconds, more preferably between 0.3 and 3 seconds. If the length is shorter than this, the coating liquid 566 is transmitted by the capillary action through the gap formed between the substrate B and the discharge port surface 536, eliminating the gap and connecting the coating liquid 566. The time required to form a bead cannot be sufficient, and if it is longer than this, the tact time becomes significantly longer, which may be a hindrance to productivity improvement.
- the gap in the slit 528 is moved out of the discharge port 534.
- the void remaining outside the die 52 near the discharge port 534 is further removed by the coating solution 566 that moves in the die longitudinal direction due to the capillary effect. since the power sale by the coating liquid 5 6 6 Ru bead connecting is easily formed in the longitudinal direction is filled in a gap portion between the ejection outlet surface 5 3 6 and the substrate B 0
- the film is cut off at the application start part 81, as shown in Fig. 16A. No 3 is generated, and as shown in FIG. 16B, the application liquid 566 is applied from the application start portion 81 without any application defects.
- Elimination of the film break 803 causes a streak defect 804 generated from the film break 803 as a starting point, and furthermore, a non-uniform film thickness caused by the film break 803. Occur The non-product partial area can be reduced.
- This method can be applied irrespective of the type and amount of coating liquid, so if this method is used, the composition or solid concentration of the coating liquid can be changed in order to eliminate the uncoated part at the start of coating. There is no need to increase the coating amount. In particular, by increasing the coating amount, it is possible to completely eliminate the inconvenience that the coating liquid 566 flows due to the substrate tilting in the section from the coating to the drying, and the film thickness uniformity is hindered. Can be done.
- This method can also be applied to a coater that uses pre-coating on a roll to eliminate film breakage 803 at the coating start part 801, thereby eliminating any pre-coating on the roll. Since it can be eliminated, it is possible to eliminate the ineffective consumption of the coating liquid due to the pre-coating, and to shorten the tact time by not performing the pre-coating.
- the viscosity of the coating solution 566 to which this method can be applied is preferably ImPa-s to 1, OOOmPas, more preferably ImPas to 50 mPas. It is.
- the coating liquid 566 is preferably Newtonian from the viewpoint of coating properties, but may be a coating liquid having thixotropy. This method is particularly effective when applying a coating solution using a highly volatile solvent such as PGMEA, butyl acetate, or ethyl lactate.
- the coating liquid 566 that can be used include a black matrix for a color filter, a coating liquid for forming color pixels, a resist liquid, an overcoat material, and the like.
- a black matrix for a color filter As a member to be coated as a substrate, in addition to a glass plate, a metal plate such as aluminum, a ceramic plate, a silicon wafer, or the like is used.
- the coating state and the coating speed used are preferably from 0.1 to 10 minutes, more preferably from 0.5 mZ to 6 minutes.
- the gap width of the die lip gap is preferably from 50 m to 1.0 m, more preferably from 80 / zm to 20 m. ⁇ Dispensing in the wet state
- the thickness is preferably li in to 50 / im, more preferably 2 ⁇ to 2 O / im. In particular, when the coating thickness in the wet state is 20 / zm or less, the effect of the present invention is remarkable.
- the black matrix film used titanium oxynitride as a light-shielding material and polyamic acid as a binder.
- a slit die 1 of the present invention (Example 1) shown in FIG. 1, a conventional slit die 301 (Comparative Example 1) shown in FIG. 12, and a conventional die shown in FIG.
- the coating liquid prepared above was applied to the entire surface of the glass substrate under the following coating conditions by a dicoater 21 shown in FIG. 9 to which each of the slit dies 401 (Comparative Example 2) was attached.
- the substrate coated with each slit die was dried at 100 ° C. for 20 minutes with a drying device using a hot plate. On the substrate after drying The thickness accuracy of the coating film was measured over the entire surface of the substrate by a light interference type non-contact film thickness meter. Table 1 shows the measurement results. The coating thickness accuracy shown in Table 1 is obtained by dividing the maximum deviation of the coating thickness unevenness by the average value of the coating thickness and expressing it as a percentage (%).
- Coating thickness 20 m
- Coating speed 3 mZ
- Clearance 100 m
- the outline shape dimensions and main accuracy of each component in the slit die 1 of the first embodiment are as follows.
- Length of tip 18 L A 0.5 mm
- Manifold 12 shape T type with width of 3.58 mm and depth of 4 mm
- first block 4 width 4 O O mm X height 35 mm X thickness 3 O mm
- stepped block 10 width 26 mm x height 26 mm x thickness 14 mm
- stepped surface 10a and 10b of stepped block 10 0.5S Length of tip 19 LB: 0.05 mm.
- the step H of the first rip 3 is such that the step h of each of the eight step blocks 10 is slightly changed by wrapping, and the maximum deviation of the step H is the width of the coating width over the longitudinal direction. Fine adjustment was made to 0.2 m within the range. The average step height H was 101.5 ⁇ . Then, the interval Lw between the two stainless steel sealing plates 6a and 6b having a thickness of 101 is interposed so that the discharge width becomes 358 mm, and the second rib is inserted. Rip 2 and the first lip 3 were combined. As a result, a lip gap 13 having a gap width L g of 101.5 / X m was formed. The lip gap accuracy at this time was 0.4 / zm.
- the discharge width, the shape of the lip tip, the shape of the manifold, and the length of the lip gap in the discharge direction were determined by the slit dies of Example 1. Same as. The dimensions and accuracy of other parts are as follows.
- Thickness of shim 304 (size L of lip gap 312): 101 / zm Rip gap accuracy: 2.8 ⁇ m
- Step difference of right lip 402 (size L of lip gap 412): 103.3 ⁇
- Deviation of step difference of right lip 402 1.2 zm
- Flatness of the inner surface of the left lip 403 1.3 / zm
- a resist solution having a solid concentration of 10% and a viscosity of 8 mPa ⁇ s was applied on the dried R-colored coating film to a thickness of 10 ⁇ . After the application, it was dried for 10 minutes on a hot plate at 90 ° C. After drying, exposure, development, and peeling were performed to leave a color coating film only on the R pixel portion, and heating was performed at a hot plate at 260 ° C. for 30 minutes to cure.
- the same color coating film was formed using the slit die and die coater of Example 1 under the same coating conditions and the same process as for the R color. did.
- the pigment of the R color coating solution is adjusted to the pigment green 36, the solid content concentration is 10%, and the viscosity is adjusted to 40 mPas in the G color coating solution.
- the pigment of the R-color coating solution was used as a pigment blue with a solid content of 10% and a viscosity adjusted to 50 mPas.
- ITO was deposited by sputtering to produce a color filter. The obtained color filter had extremely uniform and uniform chromaticity over the entire surface of the substrate, and was excellent in quality.
- a photosensitive silver paste was screen-printed to a thickness of 5 / m on the entire surface of a soda glass substrate having a width of 340 mm, a length of 440 mm and a thickness of 2.8 mm. After that, exposure was performed using a photomask, and through each step of development and baking, 1,920 stripe-shaped silver electrodes were formed at a pitch of 220 / zm. A glass paste consisting of glass and a binder was screen-printed on the electrode. Thereafter, the substrate was baked to form a dielectric layer. Next, the die coater 21 shown in FIG. 9 is provided with the slit die 101 shown in FIG. 4 (Example 2) and the conventional slit die 201 shown in FIG. 3) and conventional slit dies 301 (Comparative Example 4) shown in FIG. 12 were sequentially mounted.
- a photosensitive glass paste having a viscosity of 200,000 mPa ⁇ s composed of glass powder and a photosensitive organic component was applied at a coating thickness of 300 / im and a coating speed of ⁇ .
- ⁇ was applied to the substrate at a clearness of 350 / zm.
- each substrate was taken out of the die coater 21 by a transfer machine, put into a drying furnace using a radiation heater, and dried at 100 ° C. for 20 minutes. After drying, the thickness accuracy of the coating film formed on the substrate was measured over the entire surface of the substrate using a laser focus noncontact film thickness meter. Table 2 shows the measurement results.
- the coating thickness accuracy shown in Table 2 is obtained by dividing the maximum deviation of the coating thickness unevenness by the average value of the coating thickness, and is expressed as a percentage (%).
- the schematic shape and dimensions and the main precision of the slit die 101 of the second embodiment are as follows.
- Second Rip 2 Dimensions: width 4 7 O mm X height 10 O mm X thickness 5 O mm
- Length of tip 18 L A 2.5 mm
- Manifold 12 shape width 45 Omm x depth 2 Omm T-shaped lip gap 13 Length in discharge direction Ld: 20 mm
- Length of tip 19 L B 1. O mm.
- the step of the first lip 3 is such that the thickness of each of the five shims 111 is slightly changed by a lap, and the maximum deviation of the step H is determined by the width of the coating width in the longitudinal direction. Fine adjustment was made to 0.4 ⁇ within the range. The average step height H was 501.2 / ⁇ . Then, the interval Lw between the two stainless steel sealing plates 6a and 6b having a thickness of 51.3 jum was interposed so that the discharge width became 4300 mm, The second lip 2 and the first lip 3 were combined. As a result, a lip gap 13 having a gap width L g of 501.6 / Xm is formed. did. The lip gap accuracy at this time was 0.5 ⁇ m.
- Thickness of shim 304 (size L of lip gap 312): 498 / m Rip gap accuracy: 5.0 m
- a substrate manufactured by applying a coating liquid with the slit die of the present invention (Example 2) is exposed using a photomask designed to form a partition wall between adjacent electrodes, and then exposed. After development and baking, a pitch of 220 / zm, a line width of 30 ⁇ , a height of 130 ⁇ , and 1,921 barrier ribs were formed in each region.
- R, G, and B phosphor pastes are sequentially applied by screen printing, dried at 80 ° C for 15 minutes, and finally baked at 460 ° C for 15 minutes.
- a back plate of the plasma display was manufactured.
- the quality of the rear panel of the obtained plasma display was excellent.
- the rear plate and the front plate of this plasma display were fitted together, sealed, sealed with a mixed gas of Xe 5% and Ne 95%, and connected to a drive circuit. When the obtained plasma display was driven, it was confirmed that the plasma display had no defect and had good image quality.
- Example 3 A color filter was manufactured using a die coater 501 shown in FIG.
- the length of the discharge port 534 in the longitudinal direction is 36 O mm
- the length of the discharge port surface 536 in the coating direction is 0.5 mm
- the gap width of the slit 528 is It was set to 100 / zm.
- the die 52 was capable of forming a coating film having a width of 360 mm on the substrate B.
- an alkali-free glass substrate having a width of 36 O mm, a length of 465 mm, and a thickness of 0.7 mm was washed. After washing, the coating solution for black matrix is applied to the substrate B at a clearance of 1 ⁇ ⁇ between the die 520 and the substrate B, and at an application speed of 3 m / min. did.
- the vicinity of the discharge port 5334 of the die 520 is wiped with silicon rubber having the same shape as that of the discharge port, and then the die 520 is applied at the application start portion of the stopped substrate B. And 100 ⁇ in the vicinity of the substrate ⁇ so as to obtain a clearness.
- an application liquid 566 to be applied at a wet thickness of 10 / Xm is supplied from a syringe pump 550, and after 0.5 seconds from the start of the pump liquid supply, the substrate B is applied. This was done by starting the move.
- the black matrix coating solution used consisted of a titanium oxynitride light-shielding material, an acrylic resin binder, and a PGMEA solvent, with a solid content of 10% and a viscosity of lOmPas It has the photosensitivity adjusted to. Due to the small thickness of the formed coating film, film breakage (where the coating solution was not applied) occurred at five locations in the width direction of the substrate at the coating start part.
- the area around the discharge port 5334 of the die 502 is wiped with silicon rubber having the same shape as that of the discharge port, and then the die 52 At the start of the application, the substrate was brought close to the substrate B with a clearance of 50 / zm, and 5 L of the black matrix application liquid was discharged, and the apparatus was kept waiting for 3 seconds.
- the clearance between the die 520 and the substrate B was set to 100 / xm, and the apparatus was made to wait for 0.1 second. After this wait, application with a wet thickness of 10 m is possible.
- a coating solution 566 was supplied from a syringe pump 550 in an amount capable of functioning, and the movement of the substrate B was started 0.2 seconds after the start of pumping. As a result, film breakage at the start of application (where no application liquid was applied) was completely eliminated. The tact time of the application was 30 seconds.
- the substrate on which the coating film was formed was dried with a hot plate at 100 ° C. for 10 minutes. After drying, the substrate was subjected to exposure 'development' stripping treatment. Thereafter, heating was performed for 30 minutes at a hot plate at 260 ° C. to cure.
- the obtained substrate has a pitch of 254 m in the width direction of the substrate, a pitch of 85 ⁇ in the longitudinal direction of the substrate, and a line width of 20 ⁇ m.
- the coating thickness was measured before the lattice pattern was formed after drying, the thickness unevenness in the running direction and the width direction of the substrate, except for the 10 mm at the end, was compared to the median value.
- the substrate on which the black matrix film is formed After the substrate on which the black matrix film is formed is subjected to jet cleaning, the substrate has a clearance of 100 Aim between the die 502 and the substrate B, and a coating speed of 3 m / ".
- the coating thickness was set to 20 / zm, and the R color coating solution was applied.
- the R color coating solution consists of an acrylic resin binder, a PGMEA solvent, and a pigment with a pigment concentration of 177. These are mixed at a solid concentration of 10%, and have a viscosity of 5 mPa. ⁇ Photosensitivity adjusted to s.
- the coated substrate was dried on a hot plate at 90 ° C for 10 minutes, and then subjected to exposure, image development, and peeling treatment, leaving an R color coating with a thickness of 2 ⁇ m only on the R pixel portion. Heating was performed for 30 minutes on a hot plate at 60 ° C to cure.
- the black matrix and R-color coating film were formed on the substrate.
- the coating solution for G color was applied at a thickness of 20 / m, a clearance between the die 520 and the substrate B of 100 m, and an application speed of 3 m.
- the substrate was dried with a hot plate at 100 ° C for 10 minutes, and then exposed, developed, and peeled off. The mixture was heated with a hot plate at 260 ° C for 30 minutes and cured.
- the substrate having the black matrix, the R color and the G color coating formed thereon was applied with a coating thickness of 20 m and a clearance between the die 52 and the substrate B of 100 ⁇ m.
- the coating solution for B color was applied at an application speed of 3 m / xm.
- the substrate is dried with a hot plate at 100 ° C for 10 minutes, exposed, developed, and peeled off to leave a 2 / zm thick B-color coating film only on the B-color pixels. Then, heating was performed for 30 minutes at a hot plate at 260 ° C. to cure.
- the coating solution for G color was prepared by setting the pigment of the coating solution for R color to Pigment Green 36, adjusting the solid concentration to 10% and the viscosity to 10 mPa ⁇ s.
- the B color coating solution is obtained by adjusting the pigment of the R color coating solution to 15 pigments, adjusting the solid content to 10%, and the viscosity to 10 mPa ⁇ s.
- R, G, and B coating liquids For the application of R, G, and B coating liquids, wipe the area around the discharge port 534 of the die 520 with silicon rubber, and then apply the die B 520 to the stopped substrate B. At the start part, with a clearance of 100 / z in, it is brought close to the substrate ⁇ , and an amount of coating liquid equivalent to a ⁇ jet thickness of 20 / m is sent from the syringe pump 550, This was performed by starting the movement of substrate B 0.3 seconds after the start of pumping. The tact time for application was 30 seconds.
- the quality of the coating film on the obtained substrate was excellent.
- the film thickness distribution of the coating film was measured for each color after drying, and the thickness unevenness in the running direction and the width direction of the substrate, excluding the end 10 mm, was smaller than the median value.
- ITO was attached to the obtained substrate by sputtering.
- 1,000 color filters were manufactured.
- the obtained color filters had no coating unevenness, the chromaticity of each color filter was uniform over the entire surface of the substrate, and each color filter was excellent in quality.
- the manufacturing cost is reduced and the size is increasing.
- the uniform application of the coating liquid to the base material can improve the economics of production, or can shorten the tact time to improve productivity.
- the present invention is particularly suitable for forming a coating film on a single-wafer type member to be coated, and includes a color filter for a color liquid crystal display, an array substrate for a TFT, a back plate and a front plate for a plasma display, and an optical filter. It is preferably used for manufacturing display members such as print substrates and single-wafer coated products such as integrated circuits and semiconductors.
Landscapes
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Non-Metallic Protective Coatings For Printed Circuits (AREA)
- Coating By Spraying Or Casting (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04716344A EP1600218B1 (en) | 2003-03-03 | 2004-03-02 | Slit die, and method and device for producing base material with coating film |
US10/547,534 US7622004B2 (en) | 2003-03-03 | 2004-03-02 | Slit die, and method and device for producing base material with coating film |
DE602004023278T DE602004023278D1 (de) | 2003-03-03 | 2004-03-02 | Schlitzdüse und verfahren und vorrichtung zur herstellung von basismaterial mit überzugsfilm |
AT04716344T ATE443577T1 (de) | 2003-03-03 | 2004-03-02 | Schlitzdüse und verfahren und vorrichtung zur herstellung von basismaterial mit überzugsfilm |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003055427 | 2003-03-03 | ||
JP2003-055427 | 2003-03-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004078360A1 true WO2004078360A1 (ja) | 2004-09-16 |
Family
ID=32958663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/002537 WO2004078360A1 (ja) | 2003-03-03 | 2004-03-02 | スリットダイ、ならびに、塗膜を有する基材の製造方法および製造装置 |
Country Status (8)
Country | Link |
---|---|
US (1) | US7622004B2 (ja) |
EP (1) | EP1600218B1 (ja) |
KR (1) | KR100858889B1 (ja) |
CN (1) | CN100404145C (ja) |
AT (1) | ATE443577T1 (ja) |
DE (1) | DE602004023278D1 (ja) |
TW (1) | TWI311928B (ja) |
WO (1) | WO2004078360A1 (ja) |
Cited By (2)
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US9950453B2 (en) | 2012-12-12 | 2018-04-24 | Wacker Chemie Ag | Production of thin silicone films |
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- 2004-03-02 AT AT04716344T patent/ATE443577T1/de not_active IP Right Cessation
- 2004-03-02 KR KR1020057016450A patent/KR100858889B1/ko active IP Right Grant
- 2004-03-02 EP EP04716344A patent/EP1600218B1/en not_active Expired - Lifetime
- 2004-03-02 US US10/547,534 patent/US7622004B2/en active Active
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9950453B2 (en) | 2012-12-12 | 2018-04-24 | Wacker Chemie Ag | Production of thin silicone films |
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CN114849993B (zh) * | 2022-05-24 | 2023-04-11 | 武汉锐科光纤激光技术股份有限公司 | 点胶固化控制方法、装置、设备、系统及存储介质 |
Also Published As
Publication number | Publication date |
---|---|
KR100858889B1 (ko) | 2008-09-17 |
EP1600218B1 (en) | 2009-09-23 |
TWI311928B (en) | 2009-07-11 |
US20060096528A1 (en) | 2006-05-11 |
ATE443577T1 (de) | 2009-10-15 |
KR20050105512A (ko) | 2005-11-04 |
TW200427521A (en) | 2004-12-16 |
US7622004B2 (en) | 2009-11-24 |
CN100404145C (zh) | 2008-07-23 |
DE602004023278D1 (de) | 2009-11-05 |
EP1600218A4 (en) | 2008-09-03 |
EP1600218A1 (en) | 2005-11-30 |
CN1756605A (zh) | 2006-04-05 |
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