WO2017013903A1 - メタルマスク基材、メタルマスク、および、メタルマスクの製造方法 - Google Patents
メタルマスク基材、メタルマスク、および、メタルマスクの製造方法 Download PDFInfo
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- WO2017013903A1 WO2017013903A1 PCT/JP2016/059041 JP2016059041W WO2017013903A1 WO 2017013903 A1 WO2017013903 A1 WO 2017013903A1 JP 2016059041 W JP2016059041 W JP 2016059041W WO 2017013903 A1 WO2017013903 A1 WO 2017013903A1
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- Prior art keywords
- metal mask
- metal
- base material
- resist
- mask base
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- 239000002184 metal Substances 0.000 title claims abstract description 398
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 398
- 238000004519 manufacturing process Methods 0.000 title description 34
- 230000003746 surface roughness Effects 0.000 claims abstract description 95
- 239000000463 material Substances 0.000 claims description 187
- 239000000758 substrate Substances 0.000 claims description 34
- 229910001374 Invar Inorganic materials 0.000 claims description 21
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 239000004642 Polyimide Substances 0.000 claims description 8
- 229920001721 polyimide Polymers 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 181
- 238000000034 method Methods 0.000 description 39
- 239000011347 resin Substances 0.000 description 35
- 229920005989 resin Polymers 0.000 description 35
- 238000012360 testing method Methods 0.000 description 26
- 230000000052 comparative effect Effects 0.000 description 21
- 238000005096 rolling process Methods 0.000 description 15
- 239000011248 coating agent Substances 0.000 description 13
- 238000000576 coating method Methods 0.000 description 13
- 238000005530 etching Methods 0.000 description 12
- 239000011521 glass Substances 0.000 description 11
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 10
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- 238000000137 annealing Methods 0.000 description 9
- 239000011241 protective layer Substances 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/16—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
- H10K71/166—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering using selective deposition, e.g. using a mask
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/04—Coating on selected surface areas, e.g. using masks
- C23C14/042—Coating on selected surface areas, e.g. using masks using masks
-
- 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
- B05C21/00—Accessories or implements for use in connection with applying liquids or other fluent materials to surfaces, not provided for in groups B05C1/00 - B05C19/00
- B05C21/005—Masking devices
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/02—Local etching
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/02—Local etching
- C23F1/04—Chemical milling
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/28—Acidic compositions for etching iron group metals
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
Definitions
- the present invention is a metal mask base material having a metal surface on which a resist is disposed, for example, a metal mask base material, a metal mask, and a metal mask for forming a metal mask for an organic EL element It relates to the manufacturing method.
- a metal mask substrate which is a metal plate is used.
- a coating liquid containing a resist layer forming material is applied to the application surface of the metal mask base material, whereby a resist layer is formed.
- the resist layer is exposed and developed to form a resist layer having a predetermined pattern, and the metal mask base material is etched through the resist layer, whereby a metal mask is manufactured.
- the thickness of the resist layer varies depending on the amount of coating liquid applied to the coating surface and the degree to which the coating liquid is dried. May vary.
- a dry film resist as the resist layer (see, for example, Patent Document 1).
- the resist layer formed using the coating liquid is a layer in which the coating liquid directly applied to the metal mask substrate is cured on the coating surface, so that it is easy to form a shape following the coating surface. Therefore, it is easy to adhere to the metal mask base material.
- the resist layer formed from the dry film resist is formed by a coating liquid because a layer that is a separate body from the metal mask base material is affixed to one surface of the metal mask base material. Compared to the resist layer, it has a shape that hardly follows the coated surface, and therefore, a part of the resist layer may be peeled off from the metal mask substrate.
- the surface in contact with the resist layer is not limited to a metal mask substrate formed of a metal plate, for example, a laminate of a resin layer and a metal layer or a laminate in which a resin layer is sandwiched between metal layers.
- a metal mask substrate formed of a metal plate
- the metal mask base material is made of metal or alloy.
- the above-described circumstances are common in a resist layer having low adhesion to a metal mask substrate.
- An object of the present invention is to provide a metal mask base material, a metal mask, and a method of manufacturing a metal mask having a surface capable of enhancing adhesion at the interface between the resist and the surface.
- a metal mask base material for solving the above-mentioned problem comprises a metal surface configured so that a resist is arranged, and the three-dimensional surface roughness Sa of the surface is 0.11 ⁇ m or less, The three-dimensional surface roughness Sz is 3.17 ⁇ m or less.
- the adhesion between the metal surface and the resist is improved. .
- the surface is a first surface
- the resist is a first resist
- a second resist is arranged.
- the second surface may have a three-dimensional surface roughness Sa of 0.11 ⁇ m or less
- the second surface may have a three-dimensional surface roughness Sz of 3.17 ⁇ m or less.
- the adhesion between the first surface and the first resist and the adhesion between the second surface and the second resist are improved. Therefore, in the etching on the first surface and the second surface, processing is performed. It is possible to improve the accuracy.
- the surface may be made of Invar. According to the above configuration, since the linear expansion coefficient of the glass substrate and the linear expansion coefficient of Invar are approximately the same, the metal mask formed from the metal mask base material is applied to film formation on the glass substrate, that is, the shape It is possible to apply a metal mask with improved accuracy to film formation on a glass substrate.
- the metal mask base material further includes a metal layer formed of invar, the surface is the surface of the metal layer, and further includes a polyimide layer facing the surface of the metal layer opposite to the surface. Good.
- the metal mask base material since the linear expansion coefficient of Invar and the linear expansion coefficient of polyimide are approximately the same, even if the metal mask includes these two different materials, the metal mask changes due to a change in the temperature of the metal mask. It is possible to suppress warping of the mask. Therefore, it is possible to provide a metal mask with improved shape accuracy and mechanical strength.
- the resist is preferably a dry film resist, and the surface is preferably configured such that the dry film resist is attached thereto.
- the adhesion between the metal surface configured to be attached with the dry film resist and the dry film resist is enhanced.
- a metal mask for solving the above-described problems is a metal mask provided with a metal mask base having a metal surface.
- the metal mask base includes a plurality of through holes having openings on the surface while penetrating the metal mask base along the thickness direction of the metal mask base.
- a method of manufacturing a metal mask for solving the above-described problem includes a metal surface configured so that a resist is disposed, and the three-dimensional surface roughness Sa of the surface is 0.11 ⁇ m or less, and the surface Preparing a metal mask base material having a three-dimensional surface roughness Sz of 3.17 ⁇ m or less, disposing a resist on the surface, and a thickness direction of the metal mask base material on the metal mask base material And forming a plurality of recesses in the resist through the resist, and forming the plurality of recesses in the metal mask substrate through the resist. Forming.
- an average value in the dimension of the opening in a plan view facing the surface is A, and a value obtained by multiplying the standard deviation of the dimension by 3 is B.
- the said recessed part is formed in the said several metal mask base material so that (B / A) * 100 (%) may be 10% or less.
- the adhesion at the interface between the resist and the surface can be enhanced.
- a metal mask base material is embodied as a metal mask base material for a dry film resist
- a metal mask one embodiment of a metal mask, and a method for manufacturing the metal mask
- the metal mask manufactured using the metal mask base material for dry film resist in this embodiment is used when the organic material which comprises an organic EL element is vapor-deposited with respect to a glass substrate in the manufacturing process of an organic EL element. It is a mask.
- the structure of the metal mask base material for dry film resists, the structure of a metal mask, the manufacturing method of the metal mask base material for dry film resists, the manufacturing method of a metal mask, and an Example are demonstrated in order.
- the metal mask base material 11 is an example of the metal mask base material for dry film resists, and is a metal layer which spreads along one surface.
- the metal mask base material 11 is provided with the metal 1st surface 11a, and the 1st surface 11a is an example of the surface comprised so that a resist may be arrange
- the three-dimensional surface roughness Sa is 0.11 ⁇ m or less
- the three-dimensional surface roughness Sz is 3.17 ⁇ m or less.
- the three-dimensional surface roughness Sa and the three-dimensional surface roughness Sz are values measured by a method based on ISO 25178.
- the three-dimensional surface roughness Sa is the arithmetic average height Sa in the definition region having a predetermined area
- the three-dimensional surface roughness Sz is the maximum height Sz in the definition region having a predetermined area.
- the three-dimensional surface roughness Sa is 0.11 ⁇ m or less, and the three-dimensional surface roughness Sz is 3.17 ⁇ m or less. Therefore, it is difficult to form a gap between the first surface 11a and the first dry film resist 12 attached to the first surface 11a, and the first dry film resist 12 and the first surface 11a of the metal mask substrate 11 Adhesion at the interface increases.
- the laminate in which the first dry film resist 12 is attached to the first surface 11a of the metal mask base 11 is a metal mask forming intermediate 10 that is an intermediate for forming a metal mask.
- the material for forming the metal layer is, for example, invar, that is, an alloy containing iron and nickel as main components, and is preferably an alloy containing 36% by mass of nickel.
- the linear expansion coefficient of Invar is about 1.2 ⁇ 10 ⁇ 6 / ° C.
- the thickness of the metal layer is preferably 10 ⁇ m or more and 50 ⁇ m or less, for example.
- the linear expansion coefficient of the glass substrate and the linear expansion coefficient of Invar are approximately the same, so a metal mask formed from a metal mask base material is applied to film formation on the glass substrate. That is, a metal mask with improved shape accuracy can be applied to film formation on a glass substrate.
- the first dry film resist 12 is formed of, for example, a negative resist that is an example of a photosensitive material.
- the material for forming the first dry film resist 12 is, for example, an acrylic resin that is crosslinked by photopolymerization.
- the thickness of the first dry film resist 12 is preferably 5 ⁇ m or more and 20 ⁇ m or less, for example.
- the first dry film resist 12 may be formed from a positive resist, but in general, a negative resist is often used.
- FIG. 2 shows a first embodiment in which the metal mask base material 11 is composed of one metal layer
- FIG. 3 shows that the metal mask base material 11 has one metal layer and one resin layer.
- the 2nd form which is an example comprised from is shown.
- FIG. 4 shows the 3rd form which is an example in which the metal mask base material 11 is comprised from two metal layers and one resin layer.
- the metal layer 21 includes a second surface 11b that is a surface opposite to the first surface 11a.
- the first surface 11a is a metal surface configured such that the first dry film resist 12 is attached
- the second surface 11b is an example of a surface configured to dispose the resist in detail. These are the metal surfaces comprised so that the 2nd dry film resist 13 might be affixed.
- the metal mask forming intermediate 10 is composed of the metal layer 21, the first dry film resist 12, and the second dry film resist 13.
- the three-dimensional surface roughness Sa is preferably 0.11 ⁇ m or less, and the three-dimensional surface roughness Sz is preferably 3.17 ⁇ m or less.
- the adhesion between the second dry film resist 13 and the metal layer 21 can be enhanced also on the second surface 11 b.
- the material for forming the second dry film resist 13 is an acrylic resin that is cross-linked by, for example, photopolymerization, like the first dry film resist 12.
- the thickness of the 2nd dry film resist 13 is 5 micrometers or more and 20 micrometers or less, for example.
- the metal mask base material 11 may include a metal layer 21 and a resin layer 22 located on the opposite side of the metal layer 21 from the first dry film resist 12. It is preferable that the linear expansion coefficient of the resin layer 22 and the linear expansion coefficient of the metal layer 21 have the same tendency as temperature dependence and have the same linear expansion coefficient value.
- the metal layer 21 is an Invar layer formed from, for example, Invar
- the resin layer 22 is a polyimide layer formed from, for example, polyimide. According to this metal mask base material 11, warpage of the metal mask base material 11 due to the difference between the linear expansion coefficient of the metal layer 21 and the linear expansion coefficient of the resin layer 22 can be suppressed.
- the metal mask forming intermediate 10 in this embodiment is composed of the metal layer 21, the first dry film resist 12, and the resin layer 22.
- the resin layer 22 may be formed by coating the metal layer 21, or may be formed in a film shape separately from the metal layer 21 and attached to the metal layer 21. And when the resin layer 22 is affixed on the metal layer 21, the resin layer 22 contains the contact bonding layer which expresses adhesiveness with the metal layer 21, The structure by which this contact bond layer was affixed on the metal layer 21 It may be.
- the metal mask base material 11 is opposite to the metal layer 21 with respect to the resin layer 22 in the thickness direction of the metal mask base material 11. You may further provide the other metal layer 23 located in.
- the surface of the metal mask base material 11 opposite to the first surface 11a and including the metal layer 23 is the second surface 11b.
- the material for forming the other metal layer 23 is, for example, invar, that is, an alloy containing iron and nickel as main components, like the metal layer 21, and is preferably an alloy containing 36% by mass of nickel.
- the thickness of the metal layer 23 is preferably 10 ⁇ m or more and 50 ⁇ m or less, for example.
- the thicknesses of the other metal layers 23 may be the same as or different from the thickness of the metal layer 21.
- the second surface 11b included in the other metal layer 23 has a three-dimensional surface roughness Sa of 0.11 ⁇ m or less and a three-dimensional surface roughness.
- the thickness Sz is preferably 3.17 ⁇ m or less.
- the metal mask substrate 11 is a structure in which the metal layer 21 and the resin layer 22 are laminated, and the metal layer 23 and the resin layer 22 are laminated. It is also possible to obtain the same effect as the metal mask substrate 11 made.
- the metal mask forming intermediate 10 in this embodiment is composed of the metal layers 21 and 23, the first dry film resist 12, the resin layer 22, and the second dry film resist 14.
- the resin layer 22 may be formed by coating on one of the two metal layers, or formed in a film shape separately from the metal layers 21 and 23 and attached to the metal layers 21 and 23. May be. And when the resin layer 22 is affixed on the metal layers 21 and 23, the resin layer 22 is the adhesive layer which expresses adhesiveness with the metal layer 21, and the adhesive layer which expresses adhesiveness with the metal layer 23.
- the adhesive layers may be attached to the two metal layers 21 and 23, respectively.
- composition of metal mask The configuration of the metal mask will be described with reference to FIGS. In the following description, an example in which the metal mask base material 11 for manufacturing a metal mask is formed of one metal layer 21, that is, the first mode described with reference to FIG. 2 will be used.
- the metal mask 30 is a processed metal mask base material 11 and includes a mask base body 11M which is an example of a metal mask base body.
- the mask base 11M includes a first mask surface 11aM that is a metal surface corresponding to the first surface 11a of the metal mask base material 11 and from which the first dry film resist 12 has been removed.
- various processes for example, a washing process, etc. may be performed.
- various processes are performed on the first mask surface 11aM in which the three-dimensional surface roughness Sa and the three-dimensional surface roughness Sz are values on the first surface 11a that is the surface before the processing. It is a process that can be almost maintained.
- the mask base 11M is formed with a plurality of through holes 11c penetrating the mask base 11M along the thickness direction, and the plurality of through holes 11c are opened in the first mask surface 11aM.
- the plurality of through holes 11c are, for example, regularly arranged along one direction along the first mask surface 11aM and along a direction orthogonal to the one direction in a plan view facing the first mask surface 11aM. Lined up regularly.
- the mask base 11 ⁇ / b> M is a metal surface corresponding to the second surface 11 b of the metal mask base material 11, and is a surface from which the second dry film resist 13 has been removed. 11 bM is included.
- each of the three-dimensional surface roughness Sa and the three-dimensional surface roughness Sz is a value on the second surface 11b that is a surface before the processing. It is a process that can be almost maintained.
- Each through-hole 11c penetrates between the first mask surface 11aM and the second mask surface 11bM, and the cross-sectional area in the direction orthogonal to the direction in which each through-hole 11c penetrates the mask base body 11M is the first mask surface 11aM. And the second mask surface 11bM is the smallest.
- the adhesion between the second dry film resist 13 and the metal layer 21 is enhanced also on the second surface 11b. Therefore, even if the through hole 11c is formed by etching on the first surface 11a and etching on the second surface 11b, the accuracy of the shape in the through hole 11c is improved.
- the through-hole 11c has the first opening 41 and the first opening 41 in the thickness direction of the first opening 41 opening in the first mask surface 11aM, the second opening 42 opening in the second mask surface 11bM, and the metal layer 21.
- a constricted portion 43 is provided between the two openings 42.
- the first opening 41 is smaller than the second opening 42 in a plan view facing the first mask surface 11aM.
- the through hole 11 c has a shape in which the cross-sectional area decreases from the first opening 41 toward the constricted portion 43, and the cross-sectional area decreases from the second opening 42 toward the constricted portion 43.
- the distance between the 1st opening 41 and the narrow part 43 ie, the distance between the 1st mask surface 11aM, and the narrow part 43, is so preferable that it is small.
- the metal mask 30 when the average value in the dimension of the first opening 41 in a plan view facing the first mask surface 11aM is A and the value obtained by multiplying the standard deviation of the dimension by 3 is B (B / A) ⁇ 100 (%) is preferably 10% or less. Further, in the metal mask 30, when the average value in the dimension of the second opening 42 in a plan view facing the second mask surface 11bM is A, and the value obtained by multiplying the standard deviation of the dimension by 3 is B (B / A) ⁇ 100 (%) is preferably 10% or less.
- (B / A) ⁇ 100 (%) is 10% or less. Therefore, the dimension accuracy in the first opening 41 of the through-hole 11 c included in the metal mask 30 and the dimension in the second opening 42. High accuracy.
- the interval between the plurality of through holes 11c along one direction may be small enough to connect the recesses including the second openings 42 between the adjacent through holes 11c. Good. According to such a configuration, the thickness of the portion where the two second openings 42 are connected is thinner than the thickness of the portion of the metal mask 30 where the through hole 11c is not formed.
- the mask base material 11 for manufacturing a metal mask is the said 2nd form
- substrate 11M is comprised from a metal layer and a resin layer.
- the mask base 11M has the first mask surface 11aM, while the surface opposite to the first mask surface 11aM is not included in the metal surface but is included in the resin layer.
- the second opening 42 is formed in the first mask surface 11aM and the first opening 41 is formed in the surface included in the resin layer.
- the mask base 11M is composed of a resin layer and two metal layers sandwiching the resin layer.
- the first mask surface 11aM is included in one metal layer
- the second mask surface 11bM is included in the other metal layer.
- the through-hole 11c penetrates these resin layers and two metal layers.
- the base material 21a is directed toward a rolling device 50 including a pair of rolling rollers 51 and 52 so that the stretching direction D1 of the base material 21a and the transport direction D2 for transporting the base material 21a are parallel to each other. Convey along.
- the base material 21 a When the base material 21 a reaches between the pair of rolling rollers 51 and 52, the base material 21 a is rolled by the pair of rolling rollers 51 and 52. Thereby, the thickness of the base material 21a is reduced, and the base material 21a is extended along the conveyance direction D2, whereby the rolled material 21b can be obtained.
- the rolled material 21b is wound around the core C, the rolled material 21b may be handled in a state where the rolled material 21b is stretched into a band shape without being wound around the core C.
- the thickness of the rolling material 21b is, for example, not less than 10 ⁇ m and not more than 50 ⁇ m.
- the rolled material 21b is annealed using an annealing device 53. Thereby, the metal layer 21 as a metal mask base material is obtained. Since the annealing of the rolled material 21b is performed while pulling the rolled material 21b along the transport direction D2, it is possible to obtain the metal layer 21 as a metal mask base material in which the residual stress is reduced compared to the rolled material 21b before the annealing. it can.
- each of the rolling process and the annealing process described above may be modified as follows. That is, for example, in the rolling process, a rolling device including a plurality of pairs of rolling rollers may be used. Moreover, you may manufacture the metal layer 21 by repeating a rolling process and an annealing process in multiple times. The annealing step does not anneal the rolled material 21b while pulling the rolled material 21b along the transport direction D2, but anneals the rolled material 21b wound around the core C. Also good.
- the metal layer 21 is wound around the core C, so that the annealed metal layer 21 includes the metal layer 21.
- warp wrinkles depending on the diameter of the sticker. Therefore, depending on the size of the diameter when the metal layer 21 is wound around the core C and the material forming the base material 21a, it is preferable to anneal the rolled material 21b while pulling the rolled material 21b along the transport direction D2.
- the method for producing a metal mask includes preparing a metal mask base material having a metal surface, placing a resist on the surface, forming a recess in the metal mask base material along the thickness direction of the metal mask, and the surface. Forming through holes for forming a plurality of recesses having openings in the resist, and forming a plurality of recesses in the metal mask base material.
- the size of the opening of the concave portion may be the diameter of the opening.
- the concave portion of the metal mask base material is a hole that defines a region having a rectangular shape extending along one direction, the dimension at the opening of the concave portion is The dimension along the longitudinal direction of an opening may be sufficient, and the dimension along the transversal direction of an opening may be sufficient.
- the concave portion of the metal mask base material is a hole that defines an area having a square shape
- the dimension of the opening of the concave part is the dimension of one side of the opening. I just need it.
- the concave portion is a hole that divides a rectangular shape extending along one direction or a region having a square shape
- the corner portion of the region defined by the concave portion is inside the region defined by the concave portion. It may have an arc shape having a center of curvature.
- the metal mask base material that is the metal layer 21 including the first surface 11a and the second surface 11b described above, and the first surface 11a.
- a first dry film resist 12 to be affixed to and a second dry film resist 13 to be affixed to the second surface 11b are prepared.
- Each of the two dry film resists 12 and 13 is a film formed separately from the metal layer 21.
- the first dry film resist 12 is attached to the first surface 11a, and the second dry film resist 13 is attached to the second surface 11b. That is, the first dry film resist 12 is laminated on the first surface 11a, and the second dry film resist 13 is laminated on the second surface 11b.
- the first surface 11 a of the metal layer 21 is applied by applying predetermined heat and pressure to the three layers in a state where the metal layer 21 is sandwiched between two dry film resists.
- the first dry film resist 12 is attached to the second surface 11b, and the second dry film resist 13 is attached to the second surface 11b.
- the first dry film resist 12 and the second dry film resist 13 may be separately attached to the metal layer 21.
- each of the first surface 11a and the second surface 11b of the metal layer 21 is preferably a smooth surface.
- the three-dimensional surface roughness Sa is 0.11 ⁇ m or less
- the three-dimensional surface roughness Sz is 3.17 ⁇ m or less. Therefore, the adhesiveness between the dry film resists 12 and 13 and the metal layer 21 is increased to a preferable level.
- the metal mask forming intermediate is manufactured.
- portions of the dry film resists 12 and 13 other than the portions where the through holes are formed are exposed and the exposed dry film resist is developed.
- the first through hole 12 a is formed in the first dry film resist 12
- the second through hole 13 a is formed in the second dry film resist 13. That is, the first dry film resist 12 and the second dry film resist 13 are patterned.
- first dry film resist 12 When the first dry film resist 12 is exposed, light is allowed to reach a portion other than the portion where the first through hole 12a is formed on the surface of the first dry film resist 12 opposite to the surface in contact with the metal layer 21. Place the original version configured in.
- second dry film resist 13 When the second dry film resist 13 is exposed, light is allowed to reach a portion other than the portion where the second through-hole 13a is formed on the surface of the second dry film resist 13 opposite to the surface in contact with the metal layer 21. Place the original version configured in.
- a sodium carbonate aqueous solution is used as the developer.
- the first surface 11a of the metal layer 21 is etched using ferric chloride solution using the first dry film resist 12 as a mask, that is, through the first dry film resist 12. .
- the second protective layer 61 is formed on the second dry film resist 13 so that the second surface 11b of the metal layer 21 is not etched simultaneously with the first surface 11a.
- the material for forming the second protective layer 61 may be any material that is difficult to be etched by the ferric chloride solution.
- a first recess 11c1 that is recessed toward the second surface 11b is formed on the first surface 11a of the metal layer 21 through the first through hole 12a of the first dry film resist 12.
- the ferric chloride solution contacts the first surface 11 a of the metal layer 21 through the first through-holes 12 a formed in the first dry film resist 12.
- the ferric chloride solution is prevented from entering the interface between the first dry film resist 12 and the metal layer 21. Therefore, the first recess 11c1 is formed in the metal layer 21 in a state where the accuracy of the shape is enhanced.
- the first dry film resist 12 formed on the first surface 11a of the metal layer 21 and the second protective layer 61 in contact with the second dry film resist 13 are removed.
- a first protective layer 62 for preventing etching of the first surface 11 a is formed on the first surface 11 a of the metal layer 21.
- the formation material of the 1st protective layer 62 should just be a material which is hard to be etched with a ferric chloride liquid.
- the second surface 11b of the metal layer 21 is etched using a ferric chloride solution using the second dry film resist 13 as a mask.
- a second recess 11c2 that is recessed toward the first surface 11a is formed on the second surface 11b of the metal layer 21 via the second through hole 13a of the second dry film resist 13.
- the adhesion between the second dry film resist 13 and the metal layer 21 is also improved. Therefore, when the metal layer 21 is exposed to the ferric chloride solution, the ferric chloride solution contacts the second surface 11b of the metal layer 21 through the second through-hole 13a formed in the second dry film resist 13. On the other hand, the ferric chloride solution is prevented from entering the interface between the second dry film resist 13 and the metal layer 21. Therefore, the second concave portion 11c2 is formed in the metal layer 21 in a state where the shape accuracy is enhanced.
- the metal mask forming intermediate is formed from the metal layer, the resin layer, and the first dry film resist 12. Composed. Etching using the first dry film resist 12 as a mask is performed on such a metal mask forming intermediate, while the resin layer may be perforated by laser processing or the like.
- the metal mask forming intermediate includes a resin layer, two metal layers sandwiching the resin layer, It consists of two dry film resists 12 and 14.
- the resin layer may be perforated by laser processing or the like.
- Example The embodiment will be described with reference to FIGS. Below, the example in which a metal mask base material is comprised from one metal layer is demonstrated.
- the three-dimensional surface roughness Sa and the three-dimensional surface roughness Sz were measured by the following methods.
- the unit of each value of the three-dimensional surface roughness Sa and the three-dimensional surface roughness Sz is ⁇ m.
- the metal mask base material of Example 1 to Example 3 and the metal mask base material of Comparative Example 1 are prepared as a metal mask base material having a width of 430 mm, and a part of the raw material is 500 mm long. It was obtained by cutting out.
- the metal mask base material had a thickness of 20 ⁇ m, and the forming material was invar.
- the three-dimensional surface roughness Sa and the three-dimensional surface roughness Sz were measured using a shape analysis laser microscope (VK-X210, manufactured by Keyence Corporation) equipped with a 50 ⁇ objective lens.
- VK-X210 shape analysis laser microscope
- the three-dimensional surface roughness Sa and the three-dimensional surface roughness Sz the three-dimensional surface roughness Sa in a plane having a width of about 280 ⁇ m in one direction and a width of about 220 ⁇ m in a direction orthogonal to one direction. And the three-dimensional surface roughness Sz was measured. Note that the three-dimensional surface roughness Sa and the three-dimensional surface roughness Sz were measured in directions conforming to ISO 25178.
- each of the metal mask substrates of Examples 1 to 3 and Comparative Example 1 the surface roughness was measured on test pieces cut out from three different places.
- Each test piece had a rectangular plate shape in which the length along the length direction of the metal mask base material was 20 mm and the length along the width direction of the metal mask base material was 30 mm.
- test piece 1 was cut out from a position away from the first end by 100 mm and from the third end by 200 mm.
- the test piece 2 was cut out from a position away from the second end by 100 mm and from the third end by 70 mm.
- the test piece 3 was cut out from a position separated from the second end by 100 mm and from the fourth end by 70 mm.
- each test piece three-dimensional surface roughness Sa and three-dimensional surface roughness Sz at five measurement points were measured.
- the five measurement points were a central point in each test piece and four points on the outer periphery surrounding the central point.
- the four points on the outer periphery of each test piece were points located on the diagonal of the test piece, and the distance between the central point and each point on the outer periphery was 10 mm.
- Table 1 shows the maximum value of the three-dimensional surface roughness Sa in each test piece and the maximum value of the three-dimensional surface roughness Sz in each test piece. The values shown in were obtained.
- the maximum value of the three-dimensional surface roughness Sa in the test piece 1 is 0.09, and the maximum value of the three-dimensional surface roughness Sz is 2. 83. Further, it was confirmed that the maximum value of the three-dimensional surface roughness Sa in the test piece 2 was 0.08, and the maximum value of the three-dimensional surface roughness Sz was 2.63. Further, it was confirmed that the three-dimensional surface roughness Sa of the test piece 3 was 0.09, and the maximum value of the three-dimensional surface roughness Sz was 3.17.
- the maximum value of the three-dimensional surface roughness Sa in the test piece 1 was 0.09, and the maximum value of the three-dimensional surface roughness Sz was 2.60. It was. Further, it was confirmed that the maximum value of the three-dimensional surface roughness Sa in the test piece 2 was 0.10, and the maximum value of the three-dimensional surface roughness Sz was 2.88. Further, it was confirmed that the maximum value of the three-dimensional surface roughness Sa in the test piece 3 was 0.09, and the maximum value of the three-dimensional surface roughness Sz was 2.76.
- the maximum value of the three-dimensional surface roughness Sa in the test piece 1 was 0.10, and the maximum value of the three-dimensional surface roughness Sz was 2.93. It was. Further, it was confirmed that the maximum value of the three-dimensional surface roughness Sa in the test piece 2 was 0.11, and the maximum value of the three-dimensional surface roughness Sz was 2.84. Further, it was confirmed that the maximum value of the three-dimensional surface roughness Sa in the test piece 3 was 0.10, and the maximum value of the three-dimensional surface roughness Sz was 2.96.
- the maximum value of the three-dimensional surface roughness Sa in the test piece 1 is 0.14, and the maximum value of the three-dimensional surface roughness Sz is 5. It was found to be 10. Further, it was confirmed that the maximum value of the three-dimensional surface roughness Sa in the test piece 2 was 0.13, and the maximum value of the three-dimensional surface roughness Sz was 5.78. Further, it was confirmed that the maximum value of the three-dimensional surface roughness Sa in the test piece 3 was 0.16, and the maximum value of the three-dimensional surface roughness Sz was 5.10.
- FIG. 15 shows the first surface in the metal mask manufacturing process using the metal mask substrate of Example 1, after forming the first recess on the first surface and irradiating the first surface with irradiation light. It is the image which imaged the reflected light reflected in.
- FIG. 16 shows a first step of irradiating the first surface with irradiation light after forming the first recess on the first surface in the manufacturing process of the metal mask using the metal mask base material of Comparative Example 1. It is the image which imaged the reflected light reflected in.
- the adhesion between the metal mask substrate 11 and the first dry film resist 12 is enhanced. Therefore, in the plan view facing the first surface 11a, it is recognized that the size of the opening in each first recess 11c1 on the first surface 11a is substantially equal to the size of the opening in all other first recesses 11c1. It was.
- Example 1 the diameters of 24 first recesses were measured.
- Example 1 the diameter of the first recess 11c1 included in the region surrounded by the two-dot chain line in the first recess 11c1 shown in FIG. 15 is measured.
- Comparative Example 1 the first recess shown in FIG. The diameter of the 1st recessed part 71c1 contained in the area
- a first diameter that is a diameter in the vertical direction of the paper surface and a second diameter that is a diameter in the horizontal direction of the paper surface are measured, and for each first recess, the first diameter and the first diameter are measured.
- the average diameter which is the average value with the two diameters, was calculated.
- the first diameter, the second diameter, and the average diameter in Example 1 and the first diameter, the second diameter, and the average diameter in Comparative Example 1 were as shown in Table 3 below.
- the average diameter in the first recess 11c1 of Example 1 is not less than 47.0 ⁇ m and not more than 50.4 ⁇ m, and the average diameter in the first recess 71c1 of Comparative Example 1 is not less than 46.0 ⁇ m and not more than 64.m. It was found to be 9 ⁇ m or less.
- Example 1 the average value of the diameter in the opening of the first recess 11c1 in a plan view facing the surface of the metal mask base material 11 is A, and the value obtained by multiplying the standard deviation of the diameter by 3 is (B / A) ⁇ 100 (%) was calculated.
- (B / A) ⁇ 100 (%) is 8.2%
- (B / A) ⁇ 100 (%) is 6.6%
- the average diameter (B / A) ⁇ 100 (%) was found to be 5.9%.
- Example 1 the average value of the diameters of the openings of the first recesses 71c1 in plan view facing the surface 71a of the metal layer is A, and the value obtained by multiplying the standard deviation of the diameters by 3 is As B, (B / A) ⁇ 100 (%) was calculated. In the first diameter, (B / A) ⁇ 100 (%) is 30.3%, and in the second diameter, (B / A) ⁇ 100 (%) is 26.1%, and the average diameter (B / A) ⁇ 100 (%) was found to be 26.7%.
- Example 1 In Example 1, (B / A) ⁇ 100 (%) is 8.2% or less, that is, 10% or less. Therefore, the opening of the first concave portion 11c1 included in the metal mask base material 11, and thus the penetration included in the metal mask. It was found that the dimensional accuracy was high in the diameter at the opening of the hole. On the other hand, in Comparative Example 1, (B / A) ⁇ 100 (%) is 30.3% or less, and according to Example 1, the metal mask base material 11 has compared with Comparative Example 1. It was recognized that the dimensional accuracy was greatly increased in the diameter of the opening of the first recess 11c1, and hence the opening of the through hole of the metal mask.
- Example 1 For Example 1 and Comparative Example 1, a histogram showing the frequency of the average diameter of the first recesses every 2 ⁇ m and a histogram showing every 1 ⁇ m were prepared.
- each of several 1st recessed part 11c1 is made. It was observed that the shape was formed with high accuracy.
- the metal mask base material of Comparative Example 1 it is recognized that the shape accuracy is lowered in the plurality of first recesses 71c1 because the adhesion between the metal mask base material and the dry film resist is low. It was.
- Example 2 In each of Example 2 and Example 3, it was confirmed that a shape equivalent to the shape of the plurality of first recesses shown in FIG. 15 was obtained.
- the metal layer 21 and the first layer It was observed that the adhesion with the dry film resist 12 was increased.
- the effects listed below can be obtained. (1) Since the three-dimensional surface roughness Sa is 0.11 ⁇ m or less and the three-dimensional surface roughness Sz is 3.17 ⁇ m or less, there is a gap between the first surface 11 a and the first dry film resist 12. As a result, the adhesion at the interface between the first dry film resist 12 and the surface of the metal layer 21 is increased.
- the three-dimensional surface roughness Sa is 0.11 ⁇ m or less, and the three-dimensional surface roughness Sz is 3.17 ⁇ m or less. Therefore, also in the 2nd surface 11b among the metal layers 21, the adhesiveness of the 2nd dry film resist 13 and the metal layer 21 can be improved, and in the etching with respect to the 1st surface 11a and the 2nd surface 11b, Processing accuracy can be increased.
- the linear expansion coefficient of the glass substrate and the linear expansion coefficient of Invar are about the same. Therefore, it is possible to apply a metal mask formed from a metal mask base material to a glass substrate, that is, to apply a metal mask with improved shape accuracy to a glass substrate.
- the linear expansion coefficient of Invar and the linear expansion coefficient of polyimide are approximately the same. Therefore, even if the metal mask base material 11 includes two different materials, the metal mask 30 is less likely to warp due to a temperature change in the metal mask 30. Therefore, it is possible to provide the metal mask 30 with improved shape accuracy and mechanical strength.
- Adhesion between the second dry film resist 13 and the metal layer 21 is enhanced also on the second surface 11b in addition to the first surface 11a. Therefore, even if the through hole 11c is formed by etching on the first surface 11a and etching on the second surface 11b, the accuracy of the shape in the through hole 11c is improved.
- each through hole 11c may be substantially the same over the entire thickness direction of the metal layer 21.
- the cross-sectional area of each through hole 11c may increase from the first surface 11a to the second surface 11b in the thickness direction of the metal layer 21, or from the first surface 11a to the second surface 11b. It may be smaller.
- the material for forming the metal layer 21 may be a material other than Invar as long as it is a pure metal or an alloy. Moreover, when the forming material of the metal layer 21 is a material other than Invar, the difference in linear expansion coefficient between the forming material of the metal layer 21 and the resin layer in contact with the metal layer 21 is different in the forming material of the metal layer 21. A resin smaller than the difference between the linear expansion coefficient and the linear expansion coefficient of polyimide may be used.
- the three-dimensional surface roughness Sa on the second surface 11b may be larger than 0.11 ⁇ m, and the three-dimensional surface roughness Sz may be larger than 3.17 ⁇ m. Even with such a configuration, at least the first surface 11 a can improve the adhesion between the metal layer 21 and the first dry film resist 12.
- the metal mask 30 is not limited to the metal mask used when the organic EL element forming material is vapor-deposited on the glass substrate, and other materials such as when various metal materials are formed by vapor deposition or sputtering. It may be a metal mask for the purpose. In this case, the plurality of through holes 11c may be arranged irregularly in a plan view facing the first surface 11a.
- the resist used for etching the metal mask base material is not limited to the dry film resist described above, and may be a resist formed by applying a coating liquid for forming a resist to the metal mask base material. . That is, the resist may be disposed on the surface of the metal mask base material by application, or may be disposed on the surface of the metal mask base material by pasting. Even with such a resist, according to the above-described metal mask base material, when using a resist with low adhesion to the surface of the metal mask base material, it is possible to obtain the same effect as when using a dry film resist. Is possible.
- DESCRIPTION OF SYMBOLS 10 Metal mask formation intermediate, 11 ... Metal mask base material, 11a ... 1st surface, 11aM ... 1st mask surface, 11b ... 2nd surface, 11bM ... 2nd mask surface, 11c ... Through-hole, 11c1, 71c1 ... 1st recessed part, 11c2 ... 2nd recessed part, 11M ... Mask base
- Metal mask 41 ... 1st opening, 42 ... 2nd opening, 43 ... Constriction part, 50 ... Rolling apparatus, 51, 52 ... rolling roller, 53 ... annealing device, 61 ... second protective layer, 62 ... first protective layer, 71a ... surface, C ... core.
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Abstract
Description
上記構成によれば、ガラス基板の線膨張係数とインバーの線膨張係数とが同じ程度であるため、メタルマスク基材から形成されるメタルマスクをガラス基板に対する成膜に適用すること、すなわち、形状の精度が高められたメタルマスクをガラス基板に対する成膜に適用することが可能である。
図1から図4を参照してドライフィルムレジスト用メタルマスク基材の構成を説明する。
図1が示すように、メタルマスク基材11は、ドライフィルムレジスト用メタルマスク基材の一例であり、1つの面に沿って拡がる金属層である。メタルマスク基材11は、金属製の第1面11aを備え、第1面11aは、レジストが配置されるように構成された表面の一例、詳細には、ドライフィルムレジストが貼り付けられるように構成された表面の一例である。第1面11aにおいて、三次元表面粗さSaは0.11μm以下であり、三次元表面粗さSzは3.17μm以下である。
図2が示すように、金属層21は、第1面11aとは反対側の面である第2面11bを備えている。第1面11aは、第1ドライフィルムレジスト12が貼り付けられるように構成された金属製の表面であり、第2面11bは、レジストが配置されるように構成された表面の一例、詳細には、第2ドライフィルムレジスト13が貼り付けられるように構成された金属製の表面である。メタルマスク形成用中間体10は、これら金属層21、第1ドライフィルムレジスト12、および、第2ドライフィルムレジスト13から構成されている。
図3が示すように、メタルマスク基材11は、金属層21と、金属層21に対して第1ドライフィルムレジスト12とは反対側に位置する樹脂層22とを備えてもよい。樹脂層22の線膨張係数と、金属層21の線膨張係数とは、温度の依存性として互いに同じ傾向を示し、かつ、線膨張係数の値が同じ程度であることが好ましい。金属層21は、例えばインバーから形成されたインバー層であり、樹脂層22は、例えばポリイミドから形成されたポリイミド層である。このメタルマスク基材11によれば、金属層21の線膨張係数と、樹脂層22の線膨張係数との差によって、メタルマスク基材11に反りが生じることが抑えられる。
図4が示すように、メタルマスク基材11は、金属層21と樹脂層22とに加えて、メタルマスク基材11の厚さ方向において、樹脂層22に対して金属層21とは反対側に位置する他の金属層23をさらに備えてもよい。このメタルマスク基材11では、メタルマスク基材11における第1面11aとは反対側の面であって、金属層23の含む面が第2面11bである。
図5および図6を参照してメタルマスクの構成を説明する。なお、以下では、メタルマスクを製造するためのメタルマスク基材11が、1つの金属層21から構成される例、すなわち、図2を用いて説明された第1の形態を用いて説明する。
図7および図8を参照して、ドライフィルムレジスト用メタルマスク基材の製造方法を説明する。なお、以下では、メタルマスク基材11が、1つの金属層21から構成される例、すなわち、図2を用いて説明された第1の形態を用いて説明する。
図9から図14を参照してメタルマスク30の製造方法を説明する。なお、以下では、メタルマスク30を製造するために使用されるメタルマスク基材11が、1つの金属層21から構成される例、すなわち、図2を用いて説明された第1の形態を用いて説明する。また、図9から図14では、図示の便宜上から、メタルマスク30に形成される複数の貫通孔11cのうち、1つの貫通孔11cのみを含む部分に対する工程図が示されている。
図15から図20を参照して実施例を説明する。以下では、メタルマスク基材が1つの金属層から構成される例を説明する。
実施例1から実施例3のメタルマスク基材、および、比較例1のメタルマスク基材の各々について、三次元表面粗さSa、および、三次元表面粗さSzを以下の方法で測定した。なお、以下において、三次元表面粗さSaおよび三次元表面粗さSzの各々の値における単位は、いずれもμmである。
なお、三次元表面粗さSaおよび三次元表面粗さSzは、ISO 25178に準拠する方向によって測定した。
(1)三次元表面粗さSaが0.11μm以下であり、かつ、三次元表面粗さSzが3.17μm以下であるため、第1面11aと第1ドライフィルムレジスト12との間に隙間が形成されにくくなり、結果として、第1ドライフィルムレジスト12と金属層21の表面との界面における密着性が高まる。
・各貫通孔11cの断面積は、金属層21の厚さ方向の全体にわたってほぼ同じであってもよい。あるいは、各貫通孔11cの断面積は、金属層21の厚さ方向において、第1面11aから第2面11bに向けて大きくなってもよいし、第1面11aから第2面11bに向けて小さくなってもよい。
Claims (7)
- レジストが配置されるように構成された金属製の表面を備え、
前記表面の三次元表面粗さSaが0.11μm以下であり、
前記表面の三次元表面粗さSzが3.17μm以下である
メタルマスク基材。 - 前記表面が第1面であり、
前記レジストが第1レジストであり、
前記第1面とは反対側の面であって、第2レジストが配置されるように構成された金属製の第2面をさらに備え、
前記第2面の三次元表面粗さSaが0.11μm以下であり、
前記第2面の三次元表面粗さSzが3.17μm以下である
請求項1に記載のメタルマスク基材。 - 前記表面は、インバー製である
請求項1または2に記載のメタルマスク基材。 - インバーから形成された金属層を備え、
前記表面が前記金属層の表面であり、
前記金属層において前記表面とは反対側の面と対向するポリイミド層をさらに備える
請求項1から3のいずれか一項に記載のメタルマスク基材。 - 前記レジストは、ドライフィルムレジストであり、
前記表面は、前記ドライフィルムレジストが貼り付けられるように構成されている
請求項1から4のいずれか一項に記載のメタルマスク基材。 - 金属製の表面を有したメタルマスク基体を備えるメタルマスクであって、
前記メタルマスク基体は、前記メタルマスク基体の厚さ方向に沿って前記メタルマスク基体を貫通するとともに、前記表面に開口を有した複数の貫通孔を備え、
前記表面と対向する平面視での前記開口の寸法における平均値をAとし、前記寸法の標準偏差に3を掛けた値をBとするとき、(B/A)×100(%)が10%以下である
メタルマスク。 - レジストが配置されるように構成された金属製の表面を備え、前記表面の三次元表面粗さSaが0.11μm以下であり、前記表面の三次元表面粗さSzが3.17μm以下であるメタルマスク基材を準備することと、
前記表面にレジストを配置することと、
前記メタルマスク基材に、前記メタルマスク基材の厚さ方向に沿って窪み、かつ、前記表面に開口を有した複数の凹部を形成するための貫通孔を前記レジストに形成することと、
前記レジストを介して、前記メタルマスク基材に複数の前記凹部を形成することと、を備え、
前記メタルマスク基材に複数の前記凹部を形成することでは、前記表面と対向する平面視での前記開口の寸法における平均値をAとし、前記寸法の標準偏差に3を掛けた値をBとするとき、(B/A)×100(%)が10%以下となるように前記メタルマスク基材に複数の前記凹部を形成する
メタルマスクの製造方法。
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US10903426B2 (en) | 2021-01-26 |
TWI812668B (zh) | 2023-08-21 |
US11706968B2 (en) | 2023-07-18 |
TW201709278A (zh) | 2017-03-01 |
DE112016003225T5 (de) | 2018-04-19 |
JP6432072B2 (ja) | 2018-12-05 |
TW201921444A (zh) | 2019-06-01 |
JP7226459B2 (ja) | 2023-02-21 |
JP2019007090A (ja) | 2019-01-17 |
CN107849681A (zh) | 2018-03-27 |
TWI652721B (zh) | 2019-03-01 |
KR102071840B1 (ko) | 2020-01-31 |
KR20220009499A (ko) | 2022-01-24 |
US20180138410A1 (en) | 2018-05-17 |
JPWO2017013903A1 (ja) | 2018-02-15 |
KR20180030112A (ko) | 2018-03-21 |
KR20200011585A (ko) | 2020-02-03 |
JP7485116B2 (ja) | 2024-05-16 |
KR102071840B9 (ko) | 2021-10-20 |
JP2023054054A (ja) | 2023-04-13 |
US20210091312A1 (en) | 2021-03-25 |
JP2021073377A (ja) | 2021-05-13 |
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