WO2006027830A1 - 有機電界発光装置およびその製造方法 - Google Patents
有機電界発光装置およびその製造方法 Download PDFInfo
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- WO2006027830A1 WO2006027830A1 PCT/JP2004/013021 JP2004013021W WO2006027830A1 WO 2006027830 A1 WO2006027830 A1 WO 2006027830A1 JP 2004013021 W JP2004013021 W JP 2004013021W WO 2006027830 A1 WO2006027830 A1 WO 2006027830A1
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- light emitting
- mask
- vapor deposition
- opening
- emitting layer
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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
- C23C14/26—Vacuum evaporation by resistance or inductive heating of the source
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/20—Masks or mask blanks for imaging by charged particle beam [CPB] radiation, e.g. by electron beam; Preparation thereof
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/88—Dummy elements, i.e. elements having non-functional features
-
- 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
-
- 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
- H10K71/40—Thermal treatment, e.g. annealing in the presence of a solvent vapour
-
- 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 relates to an organic electroluminescent device in which a pixel pattern including a light emitting layer made of an organic compound formed by a mask vapor deposition method is formed, and a method for manufacturing the same.
- An organic electroluminescent device emits light by recombining holes injected from an anode and electrons injected from a cathode in an organic light emitting layer sandwiched between the two electrodes.
- the typical structure is formed by laminating a first electrode 2 formed on a substrate 1, a thin film layer including a light emitting layer 5 having at least an organic compound force, and a second electrode 6. The light emitted by is taken out from the transparent electrode side.
- Such an organic electroluminescence device can be thin, high-intensity light emission under low-voltage driving, and multicolor light emission by selecting an organic compound in the light-emitting layer, and is applied to light-emitting devices and displays.
- the fineness of the pattern of the light emitting layer of the organic electroluminescent device utilized as a display is considerably high.
- the light emitting layer is formed on the first electrode patterned in a stripe shape.
- the line width of the first electrode is usually 100 m or less, and the pitch is about 100 / zm.
- the second electrode is also formed in stripes at a pitch of several hundreds / zm so as to intersect the first electrode, and the length direction of the elongated electrode is low electrical resistance, and The electrodes adjacent in the width direction must be completely insulated.
- the light emitting layer is patterned with the same or higher definition.
- a deposition mask used for patterning the light emitting layer inevitably requires a high definition.
- the mask member manufacturing method include an etching method, mechanical polishing, sand blasting method, sintering method, laser processing method, use of photosensitive resin, etc. The method is often used.
- the mask member for the light emitting layer is usually a thin film with a thickness of 100 m or less, and is generally fixed and held on a window frame-like frame and used in the vapor deposition process.
- the mask member portion of the vapor deposition mask used for forming the light emitting layer has an opening region 9 defined on the base material by the mask region 7 and the outer edge of the arranged openings 10 for pattern formation. (Fig. 3).
- an in-plane stress difference occurs between the mask area and the opening area, and local stagnation occurs at the boundary (dotted line in Fig. 3 (a)). there were.
- the adhesion between the substrate and the vapor deposition mask is impaired at the boundary between the mask area where the stagnation occurs and the opening area, resulting in blurring of the light emitting layer pattern.
- the light emitting layer pattern when using a vapor deposition mask with a reinforcing line introduced is, for example, a vertical stripe pattern and a horizontal alternate color pattern, and the vertical pitch is the smallest and emits light. It is the same as the pixel or an integer multiple of the light emitting pixel, and the horizontal pitch is an integer multiple of the light emitting pixel.
- Patent Document 1 JP 2000-160323 A
- Patent Document 2 Japanese Patent Laid-Open No. 2000-12238
- Patent Document 3 Japanese Patent Laid-Open No. 2003-152114
- Patent Document 4 Japanese Unexamined Patent Publication No. 2003-68454
- An object of the present invention is to provide a method for manufacturing an organic electroluminescent device in which a light emitting layer is formed so that the influence of the bending of a mask member does not appear in the light emitting pixel portion, and the entire light emitting region is high-definition. That is.
- the present invention has the following configuration. That is,
- a vapor deposition mask used for vapor deposition of a light emitting layer of an organic electroluminescence device wherein the mask is an opening for forming a light emitting layer used for a light emitting pixel (hereinafter referred to as an effective opening) and a group of the above effective openings.
- an effective opening a light emitting layer used for a light emitting pixel
- a vapor deposition mask comprising a mask member having an opening (hereinafter referred to as a dummy opening) that is not used for forming an optical pixel;
- a method for producing an organic electroluminescent device comprising a step of forming a light-emitting layer by contacting or adhering to the substrate and depositing a light-emitting organic compound through the mask,
- Organic electroluminescence device in which two or more color light emitting pixels are arranged on a substrate at a predetermined pitch, in which a thin film layer including a light emitting layer having an organic compound force is sandwiched between the first electrode and the second electrode
- the light emitting layer has a striped pattern, and the light emitting pixels are arranged in an alternating pattern of each color in one direction, and are arranged in the same color in a direction orthogonal to the pattern, and Outside the region where the pixels are arranged (hereinafter referred to as the light emitting region), one or more patterns are formed that are the same organic compound as the organic compound used to form the light emitting layer, but cannot be used as a light emitting pixel.
- An organic electroluminescent device characterized by the above is intended.
- a high-definition light-emitting layer pattern can be formed over the entire region, and an organic electroluminescent device with good display quality can be obtained.
- FIG. 1 is a plan view showing an example of a pixel set.
- FIG. 2 is a schematic perspective view in which a part of the structure for explaining an example of the structure of the organic electroluminescence device is cut away.
- FIG. 3 is a schematic view showing an example of a vapor deposition mask, where (a) is a plan view and (b) is a cross-sectional view.
- FIG. 4 is a schematic perspective view showing an example of a vapor deposition mask, (a) an example of a vapor deposition mask without introducing a reinforcing wire, (b) an example of a vapor deposition mask with a reinforcing wire introduced, ( c) Another example of a vapor deposition mask with a reinforcing wire introduced.
- FIG. 5 is a schematic diagram for explaining a mask vapor deposition method.
- Fig. 6 is a schematic diagram of a bonded vapor deposition mask (single-sided vapor deposition mask) and its vapor deposition pattern. (A) explains the configuration of the vapor deposition mask, and (b) explains the vapor deposition pattern thereby.
- FIG. 7 is a schematic diagram of a bonded vapor deposition mask (four-sided vapor deposition mask) and its vapor deposition pattern. (A) explains the configuration of the vapor deposition mask, and (b) shows the vapor deposition pattern produced thereby. Explain.
- FIG. 8 is a plan view showing an example of a vapor deposition mask having a dummy opening.
- Fig. 9 shows vapor deposition in which dummy openings are arranged around the effective opening area so that there is no straight part of 10 mm or more in the outermost periphery of the opening area (including the effective opening and dummy opening). It is a top view which shows an example of a mask.
- FIG. 10 is a plan view showing another example of a vapor deposition mask having a dummy opening.
- FIG. 11 is a schematic view of a vapor deposition mask with a cross added to the frame (with crosspiece and vapor deposition mask attached) and its vapor deposition pattern, (a) explaining the configuration of the vapor deposition mask, (b ) Explains the resulting deposition pattern.
- Fig. 12 is a schematic diagram of a vapor deposition mask with no crosspiece added to the frame (no adhesion between the crosspiece and the vapor deposition mask) and its vapor deposition pattern, (a) explaining the configuration of the vapor deposition mask, (b) Explains the deposition pattern.
- the organic electroluminescent device of the present invention may be a simple matrix type or an active matrix type as long as it is an organic electroluminescent device in which light emitting pixels of two or more colors are arranged at a predetermined pitch.
- the display format is not limited.
- a display with light-emitting pixels having emission peak wavelengths in the red, green, and blue regions is called a full-color display.
- the peak wavelength of light in the red region is 560-700 nm
- the green region is 500-560 nm, blue.
- the range is 420-500nm.
- a range called a light emitting pixel is a portion that emits light when energized.
- the first electrode and the second electrode arranged opposite to each other are partly present when viewed in the thickness direction, and further, if an insulating layer is formed on the first electrode, it is regulated thereby. Range.
- the first electrode and the second electrode are formed in a stripe shape, and the intersecting portion is used as a light emitting pixel. Therefore, the light emitting pixel is often rectangular.
- the switching means may be formed in the vicinity of the light emitting pixel, and in this case, the shape of the light emitting pixel is often a rectangular shape with a part cut away from the rectangular shape.
- the shape of the luminescent pixel is The shape of the insulating layer is not limited to these, but may be any shape, for example, by controlling the shape of the insulating layer.
- the light emitting layer is formed by a mask vapor deposition method.
- the mask vapor deposition method is a method in which a vapor deposition mask is brought into contact with an object to be deposited or placed in the vicinity, and a luminescent organic compound is patterned. Vapor deposition is performed by placing the mask on the vapor deposition source side of the substrate. In order to obtain a highly accurate vapor deposition pattern, it is important to attach a vapor deposition mask with high flatness to the substrate.
- the vapor deposition mask is attached to the substrate by a technique that applies tension to the mask member and a magnet placed on the back of the substrate. For example, a close contact method is used.
- the vapor deposition mask for the light emitting layer used in the production method of the present invention will be described. Since the required accuracy of the light emitting layer pattern is high, the deposition mask used in the present invention inevitably requires a high definition. Examples of mask member manufacturing methods include etching, mechanical polishing, sand blasting, sintering, laser processing, and the use of photosensitive grease. Often the dredge method is used. The thickness of the mask member is preferably 100 ⁇ m or less.
- a light emitting pixel is formed around an effective opening region defined by an effective opening for forming a light emitting pixel and an outer edge of the group of the effective openings. It is characterized by having a dummy opening that is not used for the purpose (Fig. 8). Further, in one aspect of the organic electroluminescent device according to the production method of the present invention, a pattern that does not emit light by the same organic compound as the organic compound used in the light emitting layer is formed in the peripheral portion of the light emitting region.
- the effect of stagnation due to stress differences in the masking member does not reach the effective opening region existing inside the dummy opening. It is possible to adhere closely to the material to be deposited and to form a high-definition light emitting layer pattern.
- the effective opening area is an area defined by a closed line that is in contact with the outermost effective opening and includes the shortest length.
- dummy opening is performed so that the outermost peripheral portion of the opening region (including the effective opening and the dummy opening) does not have a straight portion of 10 mm or more.
- the mouth is preferably arranged around the effective opening area (see FIG. 9). This makes it possible to disperse local itch effectively.
- the number, shape, and size of the dummy openings are not particularly limited. It is sufficient if the number is one or more, but it is preferable if there is at least one each on the top, bottom, left, and right of the effective opening area. Regarding the shape, it may be rectangular or circular. Further, the size may be larger or smaller than the effective opening.
- This dummy opening may be processed as a unique shape, but since it is easy to manufacture the mask member, it is preferable to provide a pattern in which the effective openings are arranged in synchronization with the notches of the effective openings.
- the overall aperture is m + 1 or more in the vertical direction, and n + 1 or more in the Z or horizontal direction.
- portions other than m X n openings are used as dummy openings.
- a plurality of mask members may be used, and one of the mask members may be a mask member having the dummy opening.
- the mask members may be separated or brought into contact with each other.
- the mask member Since the mask member is easy to handle, it is usually fixed to the frame by applying a tension, but the mask member may be used as it is as an evaporation mask.
- the shape is not particularly limited, but various modes are conceivable.
- a mask member (with a desired light-emitting pixel pattern) is formed on almost the entire surface other than the margin portion (hereinafter referred to as a vapor deposition mask utilization region) that is used for fixing to the frame.
- the upper mask member has an effective opening and a lower mask that are not masked by the lower mask member.
- a dummy opening masked with a member is formed, and the vapor deposition mask of the present invention can be obtained. At this time, a part or all of the dummy opening is partially or completely covered by the lower mask member.
- the upper mask member has a uniform opening over the entire surface, This improves the accuracy of attaching to the frame where internal stress differences and distortions are unlikely to occur, and the patterning accuracy by vapor deposition.
- the light-emitting layer is deposited by providing the upper mask side on the deposition member side, and preferably contacting the upper mask with the deposition member.
- one edge of the opening of the lower mask member is outside the region surrounded by the dummy opening of the upper mask member and at a distance of 500 m from the outer edge of the effective opening region. It is inside the enclosed area.
- the pattern due to the dummy opening is not formed or exists in a small portion outside the effective opening region (this pattern is 500 ⁇ m from the outer edge of the light emitting region when an organic electroluminescent device is formed). It is preferably formed in an area within m.), and the post-processability is improved without causing dust generation or poor adhesion of wiring or the like in subsequent processing. Further, shadowing caused by the thickness of the lower mask member can be reduced or eliminated.
- the region surrounded by the dummy opening is bounded by a closed line that is in contact with the dummy opening adjacent to the effective opening region and has the shortest length without including the dummy opening. Area. (However, if there is no dummy opening at the corner of the effective opening area, the dummy opening that is virtually closest to that corner is at the same distance from the effective opening area. )
- both mask members may be stacked and then fixed to the frame.
- a fine pattern facing the substrate is formed. It is possible to prevent unnecessary force from acting on the upper mask member by fixing the formed upper mask member on the upper surface of the frame and fixing the lower mask member defining the deposition area inside the frame.
- the opening ratio is It is preferable that it is in the range of 50-200%. 80-125% is more preferable.
- the opening By making the opening as wide as possible in the area where the vapor deposition mask is used, and by making the opening ratio close to 100%, it becomes easier to calculate the expansion and contraction when tension is applied to the mask member, maintaining the shape retention and the frame. Fixing accuracy and even fluttering accuracy are improved.
- a part of the dummy opening is covered with another mask member (lower mask member).
- the lower mask member is advantageous because it merely limits the light emitting region and does not require pixel level positional accuracy. That is, even if a part of the dummy opening is covered and the part is not hidden, the pattern by the dummy opening does not constitute a light emitting pixel, so that no problem occurs.
- a photolithographic method By applying a photolithographic method to a transparent substrate on which a transparent electrode film such as indium tin oxide (ITO) is formed, a plurality of striped first electrodes arranged at regular intervals are patterned. To do.
- a transparent electrode film such as indium tin oxide (ITO)
- the organic electroluminescent device of the present invention may have an insulating layer formed so as to cover a part of the first electrode.
- various inorganic and organic materials are used, and as the inorganic material, there are acid and manganese, acid and manganese, vanadium oxide, acid and titanium, chromium oxide, etc.
- Organic materials such as semiconductor materials such as silicon and gallium arsenide, glass materials and ceramic materials, and organic materials such as polybulu, polyimide, polystyrene, novolac, and silicone polymers There are materials.
- Various known forming methods can be applied to form the insulating layer.
- a thin film layer including a light emitting layer made of an organic compound is sandwiched between a first electrode and a second electrode.
- the structure of the thin film layer is not particularly limited as long as it includes a light emitting layer.
- the materials used for a part or all of each layer may be mixed and may be shifted. .
- the light emitting layer needs to be patterned.
- three types of light-emitting layers are formed using light-emitting materials corresponding to three light-emitting colors having light emission peak wavelengths in the red (R), green (G), and blue (B) regions. Sequentially formed.
- the light-emitting layer has a force for forming a stripe pattern.
- the stripe shape referred to here is one in which each element of the stripe is continuously formed as a straight line, and an intermittent pattern is a single pattern.
- positioned on a straight line is also included. A fine intermittent pattern with better positional accuracy and adhesion can be obtained with a strong intermittent pattern.
- it is preferable that the pitch of the pattern of the light emitting layer is arranged at the same or an integer multiple of the pixel pitch.
- a second electrode is formed.
- a simple matrix method a plurality of striped second electrodes arranged at predetermined intervals on the thin film layer are arranged so as to intersect with the first electrode.
- the second electrode is often formed over the entire light emitting region. Since the second electrode is required to have a function as a cathode capable of efficiently injecting electrons, a metal material is often used in consideration of the stability of the electrode.
- the first electrode can be an opaque electrode
- the second electrode can be transparent
- the pixel upper surface force and light can be extracted.
- the first electrode may be a cathode and the second electrode may be an anode.
- n groups (n is an integer of 2 or more) on a single substrate and cutting the substrate into n pieces is used, the productivity is improved, so that the mass production can be performed. Preferred in terms of manufacturing cost
- the organic electroluminescent device of the present invention can pattern a light-emitting layer with high definition, the pitch of a pixel set in which a set of light-emitting pixels of each color is one unit is 500 ⁇ m in both vertical and horizontal directions. m or less, preferably 400 ⁇ m or less.
- Thickness 1 A glass substrate on which a 130 nm thick ITO (indium stannate) transparent electrode film was formed on a 1 mm non-alkali glass surface by sputtering was cut into a size of 120 ⁇ 100 mm. Photoresist was coated on the ITO substrate and patterned by exposure and development by the usual photolithography method. After removing unnecessary portions of ITO by etching, the photoresist was removed, and the ITO film was patterned into a stripe shape with a length of 90 mm and a width of 80 m. 816 stripe-shaped first electrodes are arranged at a pitch of 100 ⁇ m.
- ITO indium stannate
- a positive photoresist manufactured by Tokyo Ohka Kogyo Co., Ltd., OFPR-800 was applied by spin coating to a thickness of 3 m on the substrate on which the first electrode was formed.
- the coated film was exposed to a pattern through a photomask, developed and patterned with a photoresist, and cured at 180 ° C. after the image was formed.
- unnecessary portions of the insulating layer are removed, and 200 insulating layer openings of 235 ⁇ m length and 70 ⁇ m width on the stripe-shaped first electrode are arranged in the vertical direction at a pitch of 300 ⁇ m in the horizontal direction. 816 pieces were formed at a pitch of 100 / zm.
- the cross section of the edge portion of the insulating layer was a forward tapered shape.
- the substrate on which the insulating layer was formed was dehydrated by placing it in a reduced pressure atmosphere of 80 ° C and lOPa for 20 minutes.
- the thin film layer including the light emitting layer was formed by a vacuum evaporation method using a resistance wire heating method. Na us, vacuum degree during vapor deposition was less than 2 X 10- 4 Pa, during the deposition is rotated substrate relative to the deposition source. First, a hole transport layer was formed by vapor-depositing copper phthalocyanine at 15 nm and bis (N-ethylcarbazole) at 60 nm over the entire light emitting region.
- a vapor deposition mask having an opening region in which openings are arranged was used as the light emitting layer vapor deposition mask.
- the outer shape of the mask member is 120 x 84 mm, the thickness is 25 ⁇ m, and the opening area is 61.77 mm long and 100 ⁇ m wide, with 278 openings arranged at 300 m pitch in the horizontal direction.
- 205 reinforcing wires with a width of 30 m are installed at a pitch of 300 m.
- the number of openings separated by reinforcement lines is 206 in the vertical direction, of which 200 are effective openings, and the size of each opening divided by reinforcement lines is 270 m long and 100 m wide.
- trout The frame member is fixed to a 4 mm wide stainless steel frame with the same outer shape.
- a vapor deposition mask for the light emitting layer was disposed in front of the substrate to bring them into close contact with each other, and a ferrite plate magnet (YBM-1B, manufactured by Hitachi Metals, Ltd.) was disposed behind the substrate.
- a ferrite plate magnet (YBM-1B, manufactured by Hitachi Metals, Ltd.) was disposed behind the substrate.
- the insulating layer openings were arranged so as to overlap with the effective openings of the deposition mask, and the dummy openings were aligned so that there were three on each of the upper, lower, left, and right sides of the light emitting region.
- the vapor deposition mask is in contact with the thick insulating layer and is not in contact with the previously formed hole transport layer, so that mask damage is prevented.
- the deposition mask is shifted by 2 pitches to the left, and 4, 4, 1-bis (2, 2, di-dicarbyl) diphenyl (DPVBi) is deposited by 20 nm, and the blue light-emitting layer is patterned.
- DPVBi 1-bis (2, 2, di-dicarbyl) diphenyl
- Each of the green, red, and blue light-emitting layers is disposed for every three striped first electrodes, and completely covers the exposed portion of the first electrode.
- a vapor deposition mask having a structure in which a gap exists between the surface of the mask member in contact with the substrate and the reinforcing wire was used.
- the outer shape of the mask member is 120 x 84 mm, the thickness is 100 ⁇ m, and 200 striped openings with a length of 100 mm and a width of 250 ⁇ m are arranged at a pitch of 300 ⁇ m.
- a mesh-like reinforcing wire having a regular hexagonal structure with a width of 40 ⁇ m, a thickness of 35 ⁇ m, and a distance between two opposing sides of 200 ⁇ m is formed.
- the height of the gap is 100 m, which is equal to the thickness of the mask member.
- the mask member is fixed to a stainless steel frame of equal V and 4mm width!
- the second electrode was formed by a vacuum vapor deposition method using a resistance wire heating method.
- the vacuum degree during vapor deposition was less than 3 X 10- 4 Pa, during the deposition is rotated substrate for the two deposition sources .
- a vapor deposition mask for the second electrode was placed in front of the substrate to bring them into close contact, and a magnet was placed behind the substrate. At this time, both are arranged so that the insulating layer opening overlaps the effective opening of the vapor deposition mask.
- aluminum was deposited to a thickness of 200 nm, and the second electrode was patterned.
- the second electrode is arranged in stripes in an arrangement perpendicular to the first electrode.
- the substrate was taken out of the vapor deposition machine and held for 20 minutes under a reduced pressure atmosphere using a rotary pump, and then transferred to an argon atmosphere with a dew point of 90 ° C or lower. In this low-humidity atmosphere, the substrate and the glass plate for sealing were sealed together by using a curable epoxy resin.
- the patterned green light emitting layer, red light emitting layer and blue light emitting layer are formed on the ITO stripe-shaped first electrode having a width of 80 ⁇ m, a pitch of 100 ⁇ m and a number of 816,
- a simple matrix type color organic electroluminescence device was prepared in which 200 stripe-shaped second electrodes having a width of 250 ⁇ m and a pitch of 300 ⁇ m were arranged so as to be orthogonal to the electrodes. Since each of red, green, and blue, that is, a total of three light emitting pixels, forms one pixel set, this light emitting device has 272 ⁇ 200 pixel sets at a pitch of 300 ⁇ m.
- Thickness 1 A glass substrate on which a 130 nm thick ITO transparent electrode film was formed by sputtering on a 1 mm alkali-free glass surface was cut into a size of 120 ⁇ 100 mm. Photoresist is coated on the ITO substrate and exposed by normal photolithography method. I was patterning. After removing unnecessary portions of ITO by etching, the photoresist was removed, thereby patterning the ITO film into a stripe shape with a length of 90 mm and a width of 160 m. 408 stripe-shaped first electrodes are arranged at a pitch of 200 ⁇ m.
- a positive photoresist (OFPR-800, manufactured by Tokyo Ohka Kogyo Co., Ltd.) was applied on the substrate on which the first electrode was formed by spin coating so that the thickness was 3 m.
- the coated film was exposed to a pattern through a photomask, developed and patterned with a photoresist, and cured at 180 ° C. after the image was formed.
- unnecessary portions of the insulating layer are removed, and 100 openings of 470 ⁇ m in length and 140 ⁇ m in width on the first electrode in the stripe shape are formed at a pitch of 600 ⁇ m in the vertical direction. 408 were formed at 200 m pitch.
- the cross section of the edge portion of the insulating layer was a forward tapered shape.
- the substrate on which the insulating layer was formed was dehydrated by placing it in a reduced pressure atmosphere of 80 ° C. and 10 Pa for 20 minutes.
- the thin film layer including the light emitting layer was formed by a vacuum evaporation method using a resistance wire heating method. Na us, vacuum degree during vapor deposition was less than 2 X 10- 4 Pa, during the deposition is rotated substrate relative to the deposition source. First, a hole transport layer was formed by vapor-depositing copper phthalocyanine at 15 nm and bis (N-ethylcarbazole) at 60 nm over the entire light emitting region.
- a vapor deposition mask having an aperture region in which apertures are arranged was used for emitting layer patterning.
- the outer shape of the mask member is 120 x 84 mm, the thickness is 25 ⁇ m, and it has an opening area in which 142 openings of 63.54 mm length and 200 ⁇ m width are arranged at a pitch of 600 / z m in the horizontal direction.
- 105 reinforcement lines with a width of 60 m are installed at a pitch of 600 m.
- the number of openings separated by reinforcement lines is 106 in the vertical direction, of which 100 are effective openings, and the size of each opening divided by reinforcement lines is 540 m long and 200 m wide.
- the mask member is fixed to a 4 mm wide stainless steel frame with the same outer shape.
- a vapor deposition mask for the light emitting layer was arranged in front of the substrate to bring them into close contact, and a ferrite plate magnet (YBM-1B, manufactured by Hitachi Metals, Ltd.) was arranged behind the substrate.
- a ferrite plate magnet (YBM-1B, manufactured by Hitachi Metals, Ltd.) was arranged behind the substrate.
- the insulating layer openings were arranged so as to overlap with the effective openings of the deposition mask, and the dummy openings were aligned so that there were three on each of the upper, lower, left, and right sides of the light emitting region.
- the vapor deposition mask is in contact with the thick insulating layer and is not in contact with the previously formed hole transport layer, so that mask damage is prevented.
- the deposition mask is shifted by 2 pitches to the left, and 4,4,1bis (2,2, di-divinyl) diphenyl (DPVBi) is vapor-deposited by 20 nm to pattern the blue light-emitting layer.
- DPVBi 4,4,1bis (2,2, di-divinyl) diphenyl
- Each of the green, red, and blue light-emitting layers is disposed for every three striped first electrodes, and completely covers the exposed portion of the first electrode.
- a vapor deposition mask having a structure in which a gap exists between the surface of the mask member in contact with the substrate and the reinforcing wire was used.
- the outer shape of the mask member is 120 x 84 mm, the thickness is 100 ⁇ m, and 100 striped openings with a length of 100 mm and a width of 500 ⁇ m are arranged at a pitch of 600 ⁇ m.
- a mesh-like reinforcing wire having a regular hexagonal structure with a width of 40 ⁇ m, a thickness of 35 ⁇ m, and a distance between two opposing sides of 200 ⁇ m is formed.
- the height of the gap is 100 m, which is equal to the thickness of the mask member.
- the mask member is fixed to a stainless steel frame of equal V and 4mm width!
- the second electrode was formed by a vacuum vapor deposition method using a resistance wire heating method.
- the vacuum degree during vapor deposition was less than 3 X 10- 4 Pa, during the deposition is rotated substrate for the two deposition sources.
- a vapor deposition mask for the second electrode was placed in front of the substrate to bring them into close contact, and a magnet was placed behind the substrate. At this time, both are arranged so that the opening of the insulating layer overlaps the opening of the vapor deposition mask.
- aluminum was deposited to a thickness of 200 nm, and the second electrode was patterned.
- the second electrode is arranged in stripes in an arrangement perpendicular to the first electrode.
- the substrate was taken out of the vapor deposition machine, held in a reduced pressure atmosphere with a rotary pump for 20 minutes, and then transferred to an argon atmosphere with a dew point of 90 ° C or lower. In this low humidity atmosphere, The plate and the glass plate for sealing were sealed together by using a curable epoxy resin.
- the patterned green light emitting layer, red light emitting layer, and blue light emitting layer are formed on the stripe-shaped first electrodes having a width of 160 ⁇ m, a pitch of 200 ⁇ m, and a number of 408, and the first electrode
- a simple matrix type color organic electroluminescent device in which 100 stripe-shaped second electrodes having a width of 500 ⁇ m and a pitch of 600 ⁇ m were arranged so as to be orthogonal to each other. Since each of red, green, and blue, that is, a total of three light emitting pixels, forms one pixel set, the light emitting device has 136 ⁇ 100 pixel sets at a pitch of 600 ⁇ m.
- An ITO transparent electrode film having a thickness of 130 nm was formed by sputtering on an alkali-free glass surface having an outer shape of 500 X 400 mm and a thickness of 0.7 mm.
- Photoresist was coated on the ITO substrate and patterned by exposure and development by a normal photolithography method. After removing unnecessary portions of ITO by etching, the photoresist was removed, and the ITO film was patterned into a stripe shape with a length of 9 Omm and a width of 80 m. 16 stripes of 4-inch diagonal light-emitting areas with 816 stripe-shaped first electrodes arranged at a pitch of 100 m are formed, and four-sided ITO substrate is formed by dividing the glass into 200 x 214 mm. Produced.
- a positive photoresist manufactured by Tokyo Ohka Kogyo Co., Ltd., OFPR-800 was applied by spin coating to a thickness of 2 m on the substrate on which the first electrode was formed. Thereafter, it was temporarily cured at 120 ° C., and pattern exposure was performed through a photomask. Further, development was performed and photoresist patterning was performed, and after development, curing was performed at 230 ° C. As a result, unnecessary portions of the insulating layer are removed, and 200 insulating layer openings of 235 m in length and 70 m in width are formed on the stripe-shaped first electrode at a pitch of 300 m in the vertical direction and 100 in the horizontal direction.
- the cross section of the edge portion of the insulating layer had a forward tapered shape.
- the substrate on which the insulating layer was formed was dehydrated by placing it in a reduced pressure atmosphere at 80 ° C and lOPa for 20 minutes.
- the thin film layer including the light emitting layer was formed by a vacuum evaporation method using a resistance wire heating method.
- Na Contact vacuum degree during vapor deposition was less than 2 X 10- 4 Pa, during the deposition is rotated substrate relative to the deposition source.
- copper phthalocyanine was deposited at a thickness of 15 nm and bis (N-ethylcarbazole) was deposited at a thickness of 60 nm to form a hole transport layer.
- a vapor deposition mask having four aperture regions in which apertures are arranged was used as the vapor deposition mask for the light emitting layer.
- the outer shape of the mask member is 200 x 214 mm, the thickness is 25 ⁇ m, the opening is 61.77 mm long, 100 m wide, and has four opening areas arranged 278 at 300 m in the horizontal direction.
- the four-chamfered ITO substrate produced was placed at a position corresponding to the ITO pattern.
- Each opening has 205 reinforcing wires with a pitch of 300 ⁇ m and a width of 30 ⁇ m.
- the number of openings in one opening area separated by reinforcement lines is 206 in the vertical direction, of which 200 are effective openings, and the size of one opening divided by reinforcement lines is 270 m in length, It is 100 m wide.
- the mask member is fixed to a frame made of Super Invar steel having an opening of 163 ⁇ 201 mm, and the deposition mask utilization area is 163 ⁇ 201 mm.
- a vapor deposition mask for the light emitting layer was placed in front of the substrate to bring them into close contact, and a ferrite plate magnet (YBM-1B, manufactured by Hitachi Metals, Ltd.) was placed behind the substrate.
- YBM-1B ferrite plate magnet
- the insulating layer openings were arranged so as to overlap with the effective openings of the deposition mask, and the dummy openings were aligned so that each of the three light emitting areas was vertically, horizontally, and horizontally.
- the vapor deposition mask comes into contact with the thick insulating layer and does not come into contact with the previously formed hole transport layer, so that mask damage is prevented.
- the deposition mask is shifted by 2 pitches to the left, and 4, 4, 1-bis (2, 2, di-dicarbyl) diphenyl (DPVBi) is deposited by 20 nm, and the blue light-emitting layer is patterned.
- DPVBi 1-bis (2, 2, di-dicarbyl) diphenyl
- Each of the green, red, and blue light-emitting layers is disposed for every three striped first electrodes, and completely covers the exposed portion of the first electrode.
- DPVBi of 35 nm and Alq of 10 nm were deposited on the entire surface of each light emitting region. After this, the thin film
- the layer was doped by exposure to lithium vapor (thickness equivalent 0.5 nm).
- a vapor deposition mask having a structure in which a gap exists between the surface of the mask member in contact with the substrate and the reinforcing wire was used.
- the outer shape of the vapor deposition mask is 200 x 214 mm, the thickness is 100 ⁇ m, and the area where 200 stripe-shaped openings with a length of 100 mm and a width of 250 ⁇ m are arranged at a pitch of 300 ⁇ m corresponds to the ITO substrate. 4 are arranged in a row.
- a mesh-shaped reinforcing wire having a regular hexagonal structural force with a width of 40 ⁇ m, a thickness of 35 ⁇ m, and a distance between two opposing sides of 200 ⁇ m is formed.
- the height of the gap is equal to the thickness of the mask member and is 100 ⁇ m.
- the mask member is fixed to a frame made of super invert steel with an opening of 163 x 201 mm, and the deposition mask utilization area is 163 x 201 mm
- the second electrode was formed by a vacuum evaporation method using a resistance wire heating method.
- the vacuum degree during vapor deposition was less than 3 X 10- 4 Pa, during the deposition is rotated substrate for the two deposition sources.
- a vapor deposition mask for the second electrode was placed in front of the substrate to bring them into close contact, and a magnet was placed behind the substrate. At this time, both are arranged so that the insulating layer opening overlaps the effective opening of the vapor deposition mask.
- aluminum was deposited to a thickness of 300 nm, and the second electrode was patterned.
- the second electrode is arranged in stripes in an arrangement perpendicular to the first electrode.
- the substrate was taken out of the vapor deposition machine and held for 20 minutes under a reduced pressure atmosphere using a rotary pump, and then transferred to an argon atmosphere with a dew point of 90 ° C or lower. In this low-humidity atmosphere, the substrate and the glass plate for sealing were sealed together by using a curable epoxy resin.
- the patterned green light emitting layer, red light emitting layer and blue light emitting layer are formed on the ITO stripe-shaped first electrode having a width of 80 ⁇ m, a pitch of 100 ⁇ m and a number of 816.
- Four organic electroluminescent devices were mounted on which 200 stripe-shaped second electrodes having a width of 250 ⁇ m and a pitch of 300 ⁇ m were arranged so as to be orthogonal to the electrodes. This was divided into 4 parts for both the glass substrate and the sealing glass plate to obtain a simple matrix type color organic electroluminescence device having a diagonal of 4 inches.
- this light emitting device Since each one of red, green, and blue, that is, three light-emitting pixels, forms one pixel set, this light emitting device has 272 X 200 pixel sets at a 300 ⁇ m pitch. [0086] When the organic electroluminescent device was line-sequentially driven, good display characteristics could be obtained. Further, when the light emitting pixels were observed with a microscope, it was confirmed that a good light emitting layer pattern could be formed over the entire light emitting region with no color mixing with adjacent pixels. The patterning accuracy of the light emitting layer was within ⁇ 10 m.
- a mask member with an outer shape of 200 x 214 mm with openings of 270 ⁇ m in length and 100 m in width arranged in the entire area (90% or more) of the evaporation mask using a pitch of 300 ⁇ m in length and width is the same as in Example 4. Fixed to the top surface.
- a mask member with an outer shape of 162 x 200 mm, which had openings at four locations slightly larger than the light emitting area was placed directly under the deposition source side of the deposition mask and fixed inside the frame. Both mask members are not bonded to each other. In this way, a vapor deposition mask for the light emitting layer as shown in FIG. 7 was prepared. Otherwise, an organic electroluminescent device was produced in the same manner as in Example 1.
- a vapor deposition mask for the light-emitting layer use a mask member with an outer dimension of 200 x 214 mm with openings of 270 m in length and 100 m in width arranged on the entire area (90% or more) of the vapor deposition mask at a pitch of 300 m in length and width. Affixed to the added Super Invar steel frame. At this time, the crosspiece was also bonded to the vapor deposition mask. In this way, a vapor deposition mask for the light emitting layer as shown in FIG. 11 was prepared. Otherwise, an organic electroluminescent device was produced in the same manner as in Example 4. By adding cross bars to the frame, the light-emitting layer pattern using this vapor deposition mask is formed on four sides slightly larger than the light-emitting area.
- An organic electroluminescence device was produced in the same manner as in Example 1 except that the openings of the light emitting layer deposition mask were 200 vertical and 272 horizontal.
- a simple matrix type color organic electroluminescent device is produced in which the light-emitting area where the first electrode and second electrode overlap each other without the dummy opening on the light-emitting layer deposition mask and the effective opening area of the light-emitting layer deposition mask coincide. did.
- the present invention can be applied to the production of an organic electroluminescent device that is one of flat panel displays for which high definition is demanded.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP04787704A EP1802177A4 (en) | 2004-09-08 | 2004-09-08 | ORGANIC ELECTROLUMINESCENCE ELEMENT AND METHOD OF MANUFACTURING THEREOF |
CN200480043948XA CN101015234B (zh) | 2004-09-08 | 2004-09-08 | 有机电场发光装置及其制造方法 |
PCT/JP2004/013021 WO2006027830A1 (ja) | 2004-09-08 | 2004-09-08 | 有機電界発光装置およびその製造方法 |
US11/661,698 US7821199B2 (en) | 2004-09-08 | 2004-09-08 | Organic electroluminescent device and manufacturing method thereof |
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PCT/JP2004/013021 WO2006027830A1 (ja) | 2004-09-08 | 2004-09-08 | 有機電界発光装置およびその製造方法 |
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WO2006027830A1 true WO2006027830A1 (ja) | 2006-03-16 |
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US (1) | US7821199B2 (ja) |
EP (1) | EP1802177A4 (ja) |
CN (1) | CN101015234B (ja) |
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Also Published As
Publication number | Publication date |
---|---|
CN101015234B (zh) | 2010-10-13 |
EP1802177A1 (en) | 2007-06-27 |
US7821199B2 (en) | 2010-10-26 |
EP1802177A4 (en) | 2010-04-14 |
CN101015234A (zh) | 2007-08-08 |
US20080018236A1 (en) | 2008-01-24 |
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