WO2022108152A1 - Oled 화소 증착을 위한 증착용 마스크 - Google Patents
Oled 화소 증착을 위한 증착용 마스크 Download PDFInfo
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- WO2022108152A1 WO2022108152A1 PCT/KR2021/015068 KR2021015068W WO2022108152A1 WO 2022108152 A1 WO2022108152 A1 WO 2022108152A1 KR 2021015068 W KR2021015068 W KR 2021015068W WO 2022108152 A1 WO2022108152 A1 WO 2022108152A1
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- WIPO (PCT)
- Prior art keywords
- metal plate
- deposition
- deposition mask
- region
- roughness
- Prior art date
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- 230000008021 deposition Effects 0.000 title claims abstract description 207
- 229910052751 metal Inorganic materials 0.000 claims abstract description 138
- 239000002184 metal Substances 0.000 claims abstract description 138
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 26
- 208000029152 Small face Diseases 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 238000000151 deposition Methods 0.000 description 196
- 239000000758 substrate Substances 0.000 description 37
- 239000011368 organic material Substances 0.000 description 23
- 238000009826 distribution Methods 0.000 description 15
- 238000005530 etching Methods 0.000 description 10
- 230000003746 surface roughness Effects 0.000 description 10
- 238000005452 bending Methods 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 229910001374 Invar Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910002065 alloy metal Inorganic materials 0.000 description 2
- 238000005137 deposition process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Images
Classifications
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- 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
-
- 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
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/12—Organic material
-
- 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
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
-
- 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
-
- 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
Definitions
- the embodiment relates to a deposition mask for OLED pixel deposition.
- a display device is applied to and used in various devices.
- the display device is applied and used not only in small devices such as smart phones and tablet PCs, but also in large devices such as TVs, monitors, and public displays (PDs).
- PDs public displays
- UHD Ultra-High Definition
- PPI Matel Per Inch
- high-resolution display devices are being applied to small devices and large devices. Accordingly, interest in technology for implementing low power and high resolution is increasing.
- a generally used display device may be largely divided into a liquid crystal display (LCD) and an organic light emitting diode (OLED) according to a driving method.
- LCD liquid crystal display
- OLED organic light emitting diode
- the LCD is a display device driven by using liquid crystal, and has a structure in which a light source including a Cold Cathode Fluorescent Lamp (CCFL) or a Light Emitting Diode (LED) is disposed under the liquid crystal, and on the light source A display device driven by adjusting the amount of light emitted from the light source using the liquid crystal.
- CCFL Cold Cathode Fluorescent Lamp
- LED Light Emitting Diode
- the OLED is a display device driven by using an organic material, and a separate light source is not required, and the organic material itself serves as a light source and can be driven with low power.
- OLED is attracting attention as a display device that can replace LCD because it can express infinite contrast ratio, has a response speed of about 1000 times faster than LCD, and has excellent viewing angle.
- the organic material included in the light emitting layer may be deposited on a substrate by a deposition mask called a fine metal mask (FMM), and the deposited organic material corresponds to a pattern formed on the deposition mask. It is formed in a pattern that can be used to function as a pixel.
- the deposition mask is generally made of an Invar alloy metal plate containing iron (Fe) and nickel (Ni).
- a through hole passing through the first surface and the other surface may be formed on one surface and the other surface of the metal plate, and the through hole may be formed at a position corresponding to the pixel pattern.
- an organic material such as red, green, and blue may pass through the through hole of the metal plate to be deposited on the substrate, and a pixel pattern may be formed on the substrate.
- the Invar alloy metal plate used for the deposition mask may be subjected to a rolling process to modify the thickness and surface of the metal plate, and thereafter, a through hole may be formed in the metal plate.
- the rolling process is performed on the metal plate, as the stress distribution inside the metal plate is randomly changed and warped, a waviness may be formed on the surface of the metal plate. Accordingly, the length of the short axis direction of the metal plate is changed for each region, and the length of the long axis direction is also changed, so that the straightness of the metal plate may be reduced.
- An embodiment is to provide a mask for deposition capable of controlling warpage and having improved deposition efficiency.
- a deposition mask includes an iron-nickel alloy and includes a metal plate including a first surface and a second surface opposite to the first surface, wherein the metal plate is on the first surface of the metal plate. and a through-hole including a face-to-face hole and a face-to-face hole on the second surface, wherein the compressive stress of the first surface is greater than the compressive stress of the second surface, and the tensile stress of the second surface is the first surface greater than the tensile stress, the metal plate is bent in the direction of the second surface, and the height difference between the highest point and the lowest point of the first surface is 3 ⁇ m or less.
- the deposition mask according to the embodiment may control residual stress inside the deposition mask.
- the deposition mask according to the embodiment may control distribution and magnitude of compressive stress and tensile stress remaining inside the deposition mask.
- the bending of the deposition mask may be controlled. That is, the deposition mask according to the embodiment can control the bending direction, the bending position, and the degree of bending of the deposition mask.
- the deposition region of the deposition mask may be maintained flat so that the curvature is close to zero, and the non-deposition region may be maintained to be curved so that the curvature is greater than that of the deposition region.
- the deposition mask according to the embodiment minimizes a gap between the deposition mask and the deposition substrate, thereby minimizing unevenness in deposition thickness, thereby improving deposition efficiency.
- FIG. 1 is a cross-sectional view showing an organic material deposition apparatus to which a deposition mask according to an embodiment is applied.
- FIG. 2 is a cross-sectional view illustrating a contact relationship with a deposition substrate after a pretreatment process of a metal plate of a deposition mask.
- 3 is a plan view for explaining a surface waveform of a deposition mask.
- FIG. 4 is a view for explaining a pretreatment process of a metal plate of a deposition mask according to an embodiment.
- FIG. 5 is a view for explaining a shape after a pretreatment process of a metal plate of a deposition mask according to an embodiment.
- FIG. 6 and 7 are views showing scanning electron microscope (SEM) pictures of the first side ( FIG. 6 ) and the second side ( FIG. 7 ) after the pretreatment process of the metal plate of the deposition mask according to the embodiment.
- SEM scanning electron microscope
- FIG. 8 is a diagram illustrating a plan view of a deposition mask according to an embodiment.
- the terminology used in the embodiments of the present invention is for describing the embodiments and is not intended to limit the present invention.
- the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or one or more) of A and (and) B, C", it can be combined with A, B, and C. It may include one or more of all possible combinations.
- a component when it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also with the component It may also include a case of 'connected', 'coupled' or 'connected' due to another element between the other elements.
- top (above) or bottom (below) is one as well as when two components are in direct contact with each other. Also includes a case in which another component as described above is formed or disposed between two components.
- FIG. 1 is a diagram illustrating an organic material deposition apparatus to which a deposition mask according to an embodiment is applied.
- the organic material deposition apparatus 1000 may include a deposition mask 1100 , a mask frame 1200 , a deposition substrate 1300 , an organic material deposition container 1400 , and a vacuum chamber 1500 . .
- the deposition mask 1100 , the mask frame 1200 , the deposition substrate 1300 , and the organic material deposition container 1400 may be accommodated in the vacuum chamber 1500 . Accordingly, the deposition process through the deposition mask 1100 may be performed in a vacuum atmosphere.
- the deposition substrate 1300 may be a substrate used for manufacturing a display device.
- the deposition substrate 1300 may be a substrate for organic material deposition for OLED pixel patterns.
- Organic patterns of red, green, and blue may be formed on the deposition substrate 1300 to form pixels having three primary colors of light. That is, an RGB pattern may be formed on the deposition substrate 1300 .
- the deposition mask 1100 may be disposed on one surface of the deposition substrate 1300 .
- the deposition mask 1100 may be disposed on a deposition surface on which an organic material is deposited among both surfaces of the deposition substrate 1300 , and may be fixed by the mask frame 1200 .
- the organic material may pass through the through hole TH formed in the deposition mask 1100 to deposit the organic material forming the RGB pattern on the deposition surface of the deposition substrate 1300 .
- the organic material deposition vessel 1400 may be a crucible. An organic material may be disposed inside the crucible. As a heat source and/or current are supplied to the crucible, which is the organic material deposition vessel 1400 in the vacuum chamber 1500 , the organic material passes through the deposition mask 1100 to deposit the deposition substrate 1300 . It can be deposited on the surface.
- 2 and 3 are diagrams for explaining an arrangement relationship between the deposition mask 1100 and the deposition substrate 1300 .
- the deposition mask 1100 is disposed on the deposition surface of the deposition substrate 1300 , and the deposition mask 1100 is disposed in contact with the deposition surface of the deposition substrate 1300 .
- the deposition mask 1100 may be formed by forming a plurality of through holes TH in the metal plate 100 including iron and nickel.
- the deposition mask 1100 may be formed by forming a plurality of through holes TH formed through an etching process in the metal plate 100 including an Invar alloy including iron and nickel.
- the metal plate 100 may include a first surface 101 and a second surface 102 opposite to each other.
- a small face hole V1 may be formed in the first surface 101 of the metal plate 100
- a large face hole V2 may be formed in the second surface 102 of the metal plate 100 .
- the face-to-face hole V2 is disposed to face the organic material deposition vessel 1400, and thereby is a region into which the deposition material of the organic material deposition vessel 1400 is introduced, and the small-faced hole V1 is the face-to-face hole V2. ) may be a region through which the deposition material introduced from the inlet passes.
- the small face hole V1 and the face face hole V2 may be formed to partially penetrate the metal plate 100 .
- a depth of the small face hole V1 may be smaller than a depth of the large face hole V2 .
- the small face holes V1 and the face holes V2 may be disposed at positions overlapping each other in the thickness direction of the metal plate 100 and may be formed to communicate with each other.
- the metal plate 100 may have a plurality of through-holes TH formed by communicating with the face-to-face hole V1 and the face-to-face hole V2 .
- the deposition mask 1100 may be disposed such that the small face hole V1 of the deposition mask 1100 contacts the deposition surface of the deposition substrate 1300 .
- the metal plate 100 may be subjected to a pretreatment process for reducing the thickness and surface treatment of the metal plate 100 before forming the through hole TH. Accordingly, in the metal plate 100, the distribution of the stress remaining inside the metal plate, that is, tensile stress and compressive stress, is randomly changed by the pretreatment process, and the metal plate is bent by this stress distribution, and the surface of the metal plate is subjected to the pretreatment process A surface waveform formed by can be formed.
- the thickness of the metal plate is reduced to a predetermined thickness, and the surface roughness of the first and second surfaces of the metal plate is changed.
- this rolling process proceeds in one direction, the stress distribution inside the metal plate is irregularly changed by the pressure applied in the direction of the first surface and the second surface of the metal plate, and the metal plate becomes irregular due to this irregular residual stress distribution. As it was bent in the direction, a surface corrugation was formed on the surface of the metal plate.
- the size of the long width and the short width of the metal plate may be changed by the surface undulation.
- the size of the short width W1 or the long width W2 of the metal plate may be randomly changed for each region of the metal plate due to the surface waveform. That is, the size in the width direction of the metal plate and the size in the length direction of the metal plate may be randomly changed for each region of the metal plate due to the surface undulation. That is, the size of the short width W1 defined as the size in the width direction of the metal plate and the long width W2 defined as the size in the length direction of the metal plate according to the surface undulation may be randomly changed for each area of the metal plate.
- the deposition mask 1100 and the deposition substrate 1300 are brought into contact with each other by the surface waveform formed on the deposition mask 1100, the deposition mask 1100 and The contact surfaces of the deposition substrate 1300 may not completely contact each other, and a gap g that does not contact each other may be formed in some regions due to the waviness of the deposition substrate 1300 and may be in contact with each other.
- the distribution and size of the gap g may increase as the surface waveform increases.
- the first through hole TH formed in the deposition mask 100 may be displaced from the deposition region to be deposited on the deposition substrate 300 , thereby reducing deposition efficiency after the deposition process. have.
- the thickness of the organic material through the deposition region of the metal plate varies for each region, there is a problem in that the thickness of the organic material pattern deposited on the deposition substrate becomes non-uniform.
- 4 and 5 are views for explaining the stress distribution inside the metal plate after pretreatment and pretreatment of the metal plate of the deposition mask according to the embodiment.
- the metal plate 100 may be pre-processed before forming the through hole TH.
- This pretreatment may be a process of reducing the thickness of the metal plate and increasing the surface roughness of the metal plate in order to manufacture a deposition mask.
- the deposition mask according to the embodiment reduces the thickness of the metal plate 100 to a thickness that can be applied to the deposition mask by etching the first surface 101 or the second surface 102 of the metal plate 100 .
- the deposition mask may etch the second surface 102 of the metal plate so that the metal plate 100 has a thickness of 30 ⁇ m or less. Accordingly, the first surface 101 of the metal plate 100 may maintain the Invar alloy surface, which is a raw material of the metal plate, as it is, and the second surface 102 may become an etching surface by etching. .
- Figure 4 (a) is a cross-sectional view showing the internal stress distribution of the metal plate before the pretreatment process of the metal plate
- Figure 4 (b) is a cross-sectional view showing the internal stress distribution of the metal plate after the pretreatment process of the metal plate.
- the inside of the metal plate 100 is compressed symmetrically in the direction of the first surface 101 and the second surface 102 of the metal plate. Since it has the stress CS and the tensile stress TS, the metal plate 100 may be maintained in a flat state without being bent.
- the The metal plate 100 may maintain a flat state without being bent in one direction or generating a separate surface wave form due to the compressive stress CS and the tensile stress TS.
- a process of pre-treating the metal plate 100 may be performed.
- a process of etching the first surface 101 or the second surface 102 of the metal plate 100 may be performed.
- the thickness of the metal plate 100 may be reduced by etching the metal plate 100 in a direction from the second surface 102 to the first surface 101 .
- the metal plate 100 applied to the deposition mask may be manufactured by etching and removing a thickness of 10% to 50% of the total thickness of the metal plate 100 .
- the first surface and the second surface of the metal plate after etching Since the difference in stress remaining in the plane direction is not large, the metal plate cannot be bent in a desired direction.
- the compressive stress CS remaining in the direction from the second surface 102 to the first surface 101 .
- tensile stress (TS) can be removed.
- the compressive stress remaining in the direction from the first surface 101 to the second surface 102 ( CS) and tensile stress TS may be maintained as the distribution of tensile stress and compressive stress before pre-processing the metal plate 100 .
- the stress distribution of the metal plate may be changed compared to before the metal plate 100 is pretreated.
- the compressive stress of the first surface 101 of the metal plate may be greater than the compressive stress of the second surface
- the tensile stress of the second surface 102 is It may be greater than the tensile stress of the first surface.
- the compressive stress in the central region CA of the metal plate is greater than the compressive stress in the outer region OA of the metal plate, and the tensile stress in the outer region OA is It may be greater than the tensile stress of the central region CA.
- the metal plate 100 has a property of being compressed in the direction from the first surface 101 to the second surface 102, and has a property of tensioning from the central region of the metal plate to the outer region.
- the metal plate 100 has compressive stress and tensile stress in the first surface 101 , the second surface 102 , the central area CA, and the outer area OA. According to the distribution of , it may be bent in the direction of the second surface 102 . In detail, both ends of the metal plate 100 may be bent in the direction of the second surface 102 . That is, the metal plate 100 may be bent such that the curvature gradually increases from the central region to the outer region. In detail, in the metal plate 100 , the central area CA may be flat and the outer area OA may be curved.
- the central region in which the deposition region is disposed is maintained flat so that the curvature is close to zero, and the outer region in which the deposition region is not disposed is maintained to be curved.
- a gap according to a surface waveform in the deposition region may be minimized.
- the first surface 101 of the metal plate may have a highest point HP and a lowest point LP. That is, the first surface 101 of the metal plate may have the highest point HP in the central area CA of the metal plate 100 and the lowest point LP in the outer area OA.
- the height difference h between the highest point HP and the lowest point LP may be about 3 ⁇ m or less.
- the curvature increases in the central region of the first surface 101 of the metal plate, and thus, the deposition
- a gap region in which the deposition region of the metal plate disposed in the central region of the metal plate does not come into contact with the deposition substrate 1300 is increased, so that deposition efficiency may decrease.
- the surface roughness of the first surface 101 and the surface roughness of the second surface 102 may be different from each other.
- the etched surface of the surface of the metal plate 100 may have a smaller surface roughness than the non-etched surface. Accordingly, as described above, when the second surface 102 of the metal plate 100 is etched, the surface roughness of the first surface 101 may be greater than the surface roughness of the second surface 102 .
- the arithmetic mean roughness Ra of the first surface 101 may be greater than the arithmetic mean roughness Ra of the second surface 102 .
- the 10-point average roughness Rz of the first surface 101 may be greater than the 10-point average roughness Rz of the second surface 102 .
- the arithmetic mean roughness Ra in the longitudinal direction of the metal plate of the first surface may be in the range of 0.05 ⁇ m to 0.5 ⁇ m
- the arithmetic mean roughness Ra in the width direction may be in the range of 0.05 ⁇ m to 0.5 ⁇ m
- the arithmetic mean roughness Ra in the longitudinal direction of the metal plate of the second surface may be in the range of 0.05 ⁇ m to 0.2 ⁇ m
- the arithmetic mean roughness Ra in the width direction may be in the range of 0.1 ⁇ m to 0.5 ⁇ m.
- the first surface may have substantially similar roughness in the longitudinal direction to the roughness in the width direction of the metal plate. Accordingly, the first surface is not textured on the surface.
- the 10-point average roughness Rz in the longitudinal direction of the metal plate of the first surface may be in a range of 1.0 ⁇ m to 3.0 ⁇ m
- the 10-point average roughness Rz in the width direction may be in a range of 1.0 ⁇ m to 3.0 ⁇ m
- the 10-point average roughness (Rz) in the longitudinal direction of the metal plate of the second surface may be 0.2 ⁇ m to 1.0 ⁇ m
- the arithmetic mean roughness Ra in the width direction may be 1.0 ⁇ m to 3.0 ⁇ m.
- the second surface may have different roughness in the longitudinal direction and in the width direction of the metal plate. Accordingly, a texture may be formed on the surface of the second surface.
- the difference between the arithmetic mean roughness Ra in the longitudinal direction and the arithmetic mean roughness Ra in the width direction on the first surface is the arithmetic mean roughness Ra in the longitudinal direction and the arithmetic mean roughness Ra in the width direction on the second surface. It may be smaller than the difference between the average roughness Ra.
- the difference between the 10-point average roughness Rz in the longitudinal direction and the 10-point average roughness Rz in the width direction on the first surface is the 10-point average roughness Rz in the longitudinal direction on the second surface and the width It may be smaller than the difference of the 10-point average roughness Rz in the direction.
- the first surface and the second surface may have different surface shapes according to the texture of the surface.
- the surface roughness of the first surface 101 on which the small hole surface V1 is formed is the surface roughness of the second surface 102 on which the large hole surface V2 is formed. can be larger than
- the arithmetic mean roughness Ra of the first surface 101 may be 1.2 times to 1.65 times the arithmetic mean roughness Ra of the second surface 102 .
- the 10-point average roughness Rz of the first surface 101 may be 1.2 times to 1.65 times the 10-point average roughness Rz of the second surface 102 .
- the arithmetic average roughness (Ra) or 10-point average roughness (Rz) of the first surface 101 is 1.65 times the arithmetic average roughness (Ra) or 10-point average roughness (Rz) of the second surface 102 .
- Ra arithmetic average roughness
- Rz 10-point average roughness
- FIG. 8 is a diagram illustrating a plan view of a deposition mask according to an embodiment.
- the deposition mask 1100 may include a deposition area DA and a non-deposition area NDA.
- the deposition area DA may be an area for forming a deposition pattern. That is, a deposition material may be deposited as a deposition substrate through the deposition mask through the deposition area DA.
- the deposition mask 1100 may include a plurality of deposition areas DA.
- the deposition area DA may include an effective portion and an ineffective portion.
- the deposition area DA may include a plurality of effective portions in which a plurality of through-holes are formed to form a deposition pattern, and an ineffective view UA in which the through-holes are not formed.
- a plurality of through-holes TH described above may be formed in the effective portion.
- the plurality of effective parts may include a first effective part AA1 , a second effective part AA2 , and a third effective part AA3 , and may be spaced apart from each other by the separation areas IA1 and IA2 .
- an effective portion of any one of a plurality of deposition regions included in the deposition mask 1100 may be for forming one display device.
- a plurality of effective portions included in one deposition mask 1100 may be a part for forming one display device. Accordingly, one deposition mask 1100 may include a plurality of effective portions, and thus a plurality of display devices may be formed at the same time. Accordingly, the deposition mask 1100 according to the embodiment may improve process efficiency.
- the non-deposition area NDA may be disposed on both sides of the deposition area DA in the longitudinal direction. That is, the non-deposition area NDA may be disposed outside the deposition area DA in the longitudinal direction.
- the non-deposition area NDA may be an area not involved in deposition.
- the non-deposition area NDA may include frame fixing areas FA1 and FA2 for fixing the deposition mask 1100 to the mask frame 1200 .
- the non-deposition area NDA may include half-etched portions HF1 and HF2 , open portions OA1 and OA2 , and protrusions PA1 and PA2 .
- the deposition area DA and the non-deposition area NDA may correspond to positions of the central area CA and the outer area OA of the metal plate 100 described above, respectively.
- the deposition area DA may correspond to the central area CA of the metal plate 100 .
- the non-deposition area NDA may correspond to the outer area OA of the metal plate 100 .
- the deposition area DA may be flat and the non-deposition area NDA may be curved.
- both ends of the deposition mask 1100 may be bent.
- both ends of the deposition mask 1100 may be bent in the direction of the facing hole. That is, the deposition mask 1100 may be bent in the face-to-face hole direction to gradually increase in curvature while extending from the deposition area DA to the non-deposition area NDA.
- the deposition area DA of the deposition mask 1100 is maintained flat so that the curvature is close to zero, and the non-deposition area NDA maintains the shape of the deposition mask so that it is curved, so that the deposition mask When 1100 and the deposition substrate 1300 are brought into contact, a phenomenon in which the deposition region and the deposition substrate 1300 are lifted can be minimized.
- the deposition mask according to the embodiment may control residual stress inside the deposition mask.
- the deposition mask according to the embodiment may control the distribution and size of compressive stress and tensile stress remaining inside the deposition mask.
- the bending of the deposition mask may be controlled. That is, the deposition mask according to the embodiment can control the bending direction, the bending position, and the degree of bending of the deposition mask.
- the deposition region of the deposition mask may be maintained flat so that the curvature is close to zero, and the non-deposition region may be maintained to be curved so that the curvature is greater than that of the deposition region.
- the deposition mask according to the embodiment minimizes a gap between the deposition mask and the deposition substrate, thereby minimizing unevenness in deposition thickness, thereby improving deposition efficiency.
- a separate tensile process for reducing the surface waveform of the deposition mask may be omitted.
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Electroluminescent Light Sources (AREA)
- Physical Vapour Deposition (AREA)
Abstract
Description
Claims (10)
- 철-니켈 합금을 포함하고, 제 1 면 및 상기 제 1 면과 반대되는 제 2 면을 포함하는 금속판을 포함하고,상기 금속판은,상기 금속판의 제 1 면 상의 소면공 및 상기 제 2 면 상의 대면공을 포함하는 관통홀을 포함하고,상기 제 1 면의 압축 응력은 상기 제 2 면의 압축응력보다 크고,상기 제 2 면의 인장응력은 상기 제 1 면의 인장응력보다 크고,상기 금속판의 끝단은 상기 제 2 면 방향으로 휘어지고,상기 제 1 면의 최고점과 최저점의 높이 차이는 3㎛ 이하인 증착용 마스크.
- 제 1항에 있어서,상기 금속판의 중앙 영역의 압축 응력은 상기 금속판의 외곽 영역의 압축 응력보다 크고,상기 외곽 영역의 인장 응력은 상기 중앙 영역의 인장 응력보다 큰 증착용 마스크.
- 제 1항에 있어서,상기 제 1 면의 산술 평균 조도는 상기 제 2 면의 산술 평균 조도 보다 큰 증착용 마스크.
- 제 1항에 있어서,상기 제 1 면의 10점 평균 조도는 상기 제 2 면의 10점 평균 조도 보다 큰 증착용 마스크..
- 제 1항에 있어서,상기 금속판은 상기 금속판의 중앙 영역에서 외곽 영역으로 연장하면서 곡률이 증가하는 증착용 마스크.
- 제 1항에 있어서,상기 금속판은 증착 영역 및 상기 증착 영역의 외측에 배치되는 비증착 영역을 포함하고,상기 소면공 및 상기 대면공은 상기 증착 영역에 배치되고,상기 증착 영역에서 상기 비증착 영역으로 연장하면서 곡률이 증가하는 증착용 마스크.
- 제 1항에 있어서,상기 제 1 면에서의 길이 방향의 산술 평균 조도와 폭 방향의 산술 평균 조도의 차이는 상기 제 2 면에서의 길이 방향의 산술 평균 조도와 폭 방향의 산술 평균 조도의 차이보다 작은 증착용 마스크.
- 제 1항에 있어서,상기 제 1 면에서의 길이 방향의 10점 평균 조도와 폭 방향의 10점 평균 조도의 차이는 상기 제 2 면에서의 길이 방향의 10점 평균 조도와 폭 방향의 10점 평균 조도의 차이보다 작은 증착용 마스크
- 제 1항에 있어서,상기 제 1 면의 상기 금속판의 길이 방향의 산술 평균 조도(Ra)는 0.05㎛ 내지 0.5㎛이고, 폭 방향의 산술 평균 조도(Ra)는 0.05㎛ 내지 0.5㎛이고,상기 제 2 면의 상기 금속판의 길이 방향의 산술 평균 조도(Ra)는 0.05㎛ 내지 0.2㎛이고, 폭 방향의 산술 평균 조도(Ra)는 0.1㎛ 내지 0.5㎛이고,상기 제 1 면의 상기 금속판의 길이 방향의 10점 평균 조도(Rz)는 1.0㎛ 내지 3.0㎛이고, 폭 방향의 10점 평균 조도(Rz)는 1.0㎛ 내지 3.0㎛이고,상기 제 2 면의 상기 금속판의 길이 방향의 10점 평균 조도(Rz)는 0.2㎛ 내지 1.0㎛이고, 폭 방향의 산술 평균 조도(Ra)는 1.0㎛ 내지 3.0㎛인 증착용 마스크.
- 제 1항에 있어서,상기 대면공은 증착 물질이 유입되는 영역이고, 상기 소면공은 상기 대면공으로부터 유입된 증착물질이 통과되는 영역인 증착용 마스크.
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JP2023528521A JP2023550060A (ja) | 2020-11-20 | 2021-10-26 | Oled画素蒸着のための蒸着用マスク |
US18/031,659 US20230383394A1 (en) | 2020-11-20 | 2021-10-26 | Deposition mask for oled pixel deposition |
CN202180077844.4A CN116472793A (zh) | 2020-11-20 | 2021-10-26 | 用于oled像素沉积的沉积掩模 |
EP21894923.8A EP4250383A4 (en) | 2020-11-20 | 2021-10-26 | DEPOSITION MASK FOR OLED PIXEL DEPOSITION |
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KR1020200156462A KR20220069397A (ko) | 2020-11-20 | 2020-11-20 | Oled 화소 증착을 위한 증착용 마스크 |
KR10-2020-0156462 | 2020-11-20 |
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US (1) | US20230383394A1 (ko) |
EP (1) | EP4250383A4 (ko) |
JP (1) | JP2023550060A (ko) |
KR (1) | KR20220069397A (ko) |
CN (1) | CN116472793A (ko) |
WO (1) | WO2022108152A1 (ko) |
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KR101761494B1 (ko) * | 2013-01-10 | 2017-07-25 | 다이니폰 인사츠 가부시키가이샤 | 금속판, 금속판의 제조 방법, 및 금속판을 사용해서 증착 마스크를 제조하는 방법 |
US20180315962A1 (en) * | 2017-05-01 | 2018-11-01 | Emagin Corporation | Mechanically Pre-biased Shadow Mask and Method of Formation |
KR20190058055A (ko) * | 2017-11-21 | 2019-05-29 | 엘지이노텍 주식회사 | 증착용 마스크용 금속판의 잔류 응력 측정 방법 및 잔류 응력 특성이 개선된 증착용 마스크용 금속판 |
US20190211436A1 (en) * | 2017-01-31 | 2019-07-11 | Sakai Display Products Corporation | Method for producing deposition mask, deposition mask, and method for producing organic semiconductor device |
KR102163526B1 (ko) * | 2013-09-13 | 2020-10-08 | 다이니폰 인사츠 가부시키가이샤 | 금속판, 금속판의 제조 방법, 및 금속판을 사용하여 마스크를 제조하는 방법 |
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CN108149190B (zh) * | 2017-12-06 | 2020-06-30 | 信利(惠州)智能显示有限公司 | 掩膜板及其制作方法 |
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- 2020-11-20 KR KR1020200156462A patent/KR20220069397A/ko unknown
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2021
- 2021-10-26 WO PCT/KR2021/015068 patent/WO2022108152A1/ko active Application Filing
- 2021-10-26 US US18/031,659 patent/US20230383394A1/en active Pending
- 2021-10-26 EP EP21894923.8A patent/EP4250383A4/en active Pending
- 2021-10-26 CN CN202180077844.4A patent/CN116472793A/zh active Pending
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KR101761494B1 (ko) * | 2013-01-10 | 2017-07-25 | 다이니폰 인사츠 가부시키가이샤 | 금속판, 금속판의 제조 방법, 및 금속판을 사용해서 증착 마스크를 제조하는 방법 |
KR102163526B1 (ko) * | 2013-09-13 | 2020-10-08 | 다이니폰 인사츠 가부시키가이샤 | 금속판, 금속판의 제조 방법, 및 금속판을 사용하여 마스크를 제조하는 방법 |
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KR20220069397A (ko) | 2022-05-27 |
US20230383394A1 (en) | 2023-11-30 |
CN116472793A (zh) | 2023-07-21 |
EP4250383A4 (en) | 2024-05-29 |
EP4250383A1 (en) | 2023-09-27 |
JP2023550060A (ja) | 2023-11-30 |
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