WO2013051230A1 - 有機el素子及びその製造方法 - Google Patents
有機el素子及びその製造方法 Download PDFInfo
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- WO2013051230A1 WO2013051230A1 PCT/JP2012/006268 JP2012006268W WO2013051230A1 WO 2013051230 A1 WO2013051230 A1 WO 2013051230A1 JP 2012006268 W JP2012006268 W JP 2012006268W WO 2013051230 A1 WO2013051230 A1 WO 2013051230A1
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- Prior art keywords
- organic
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- light emitting
- organic light
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- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 title description 19
- 239000000758 substrate Substances 0.000 claims abstract description 131
- 238000000605 extraction Methods 0.000 claims description 75
- 238000007789 sealing Methods 0.000 claims description 56
- 230000004913 activation Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 14
- 238000012986 modification Methods 0.000 description 14
- 239000011368 organic material Substances 0.000 description 8
- 238000001771 vacuum deposition Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000005304 joining Methods 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000000059 patterning Methods 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 230000005525 hole transport Effects 0.000 description 2
- 238000001579 optical reflectometry Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 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
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/88—Terminals, e.g. bond pads
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
- H10K50/813—Anodes characterised by their shape
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/822—Cathodes characterised by their shape
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/841—Self-supporting sealing arrangements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/842—Containers
-
- 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
- H10K71/621—Providing a shape to conductive layers, e.g. patterning or selective deposition
Definitions
- the present invention relates to an organic EL element in which an organic light emitting portion is sealed and a method for manufacturing the same.
- the organic EL element can emit light with high luminance at a low voltage, and various emission colors can be obtained depending on the type of organic material used in the organic light emitting layer, and can be easily manufactured as a flat light emitting panel. . Therefore, in recent years, an illuminating device including a light emitting panel using an organic EL element as a light source has attracted attention.
- an organic material used for an organic light emitting part is deteriorated by the influence of moisture, oxygen, etc., and the light emitting performance and life are reduced. Therefore, in the organic EL element, a sealing structure that seals the organic light emitting unit is employed in order to protect the organic material from moisture, oxygen, and the like.
- An organic EL element having such a sealing structure is shown in FIG. As shown in FIGS. 5A and 5B, the organic EL element 101 is provided on an organic EL substrate 104 having an organic light emitting unit 103 formed on one surface of a translucent substrate 102, and the organic EL substrate 104. And a sealing cap substrate 105 that seals the organic light emitting unit 103.
- a lower electrode 131 made of a translucent conductive material such as ITO is patterned on the translucent substrate 102.
- the organic light emitting unit 103 is formed so as to straddle the lower electrode 131 and a part of the translucent substrate 102, and has light reflectivity on the organic light emitting unit 103 and the lower electrode 131 on which the organic light emitting unit 103 is not provided.
- An upper electrode 132 is formed.
- the sealing cap substrate 105 has a recess 151 formed at a position corresponding to the organic light emitting unit 103, and is bonded to the organic EL substrate 104 via an adhesive resin material 140 at the peripheral edge of the recess 151.
- the positive electrode 131a and the negative electrode 131b are formed at a predetermined interval so as to be insulated from each other, so that the positive electrode 131a and the negative electrode 131b are formed on the organic EL substrate 104.
- the resin material 140 is arranged with a certain thickness so as to straddle these steps as shown in FIG. As shown to (d), the clearance gap G arises between the resin material 140 and the sealing cap board
- An organic EL device that seals the organic light emitting unit using a flexible cap substrate and eliminates a step at the bonding surface between the translucent substrate and the cap substrate by providing a through wiring that penetrates the cap substrate. It is known (see, for example, Patent Document 1).
- This invention solves the said subject, and aims at providing the organic EL element which can seal an organic light emission part in an airtight state, and an organic light emission part cannot deteriorate easily, and its manufacturing method.
- an organic EL device includes an organic EL substrate having an organic light emitting unit provided on one surface of a light-transmitting substrate, and the organic light emitting unit provided on the organic EL substrate.
- An organic EL element including a sealing cap substrate for sealing, wherein the organic EL substrate includes a lower electrode and an upper electrode that supply power to the organic light emitting unit, and a first electrode provided on the electrodes themselves An extraction pad; and a first joint provided at a peripheral edge of the translucent substrate, wherein the sealing cap substrate has a recess provided at a position facing the organic light emitting unit, A second electrode extraction pad provided at a position opposite to the first electrode extraction pad, and provided so as to penetrate the sealing cap substrate from the second electrode extraction pad to the side opposite to the organic EL substrate.
- a connection surface between the first electrode extraction pad and the second electrode extraction pad is present on the same plane as a bonding interface between the first bonding portion and the second bonding portion. preferable.
- the organic EL element it is preferable that one or both of the lower electrode and the upper electrode is used for the first bonding portion.
- the first bonding portion is formed integrally with the first electrode extraction pad, and the second bonding portion is formed integrally with the second electrode extraction pad. Preferably it is.
- the organic EL element includes a step of forming a lower electrode corresponding to each of a positive electrode and a negative electrode for supplying power to an organic light emitting unit on a translucent substrate, and straddling the translucent substrate and the lower electrode.
- Forming the organic light emitting part, and forming the upper electrode on the lower electrode and the organic light emitting part, and a portion of the upper electrode where the organic light emitting part is not provided is a first electrode extraction pad
- the first bonding portion provided at the peripheral portion of the translucent substrate in the organic EL substrate and the second bonding portion of the sealing cap substrate are bonded by the surface activation bonding.
- the organic light emitting part can be sealed in an airtight state, and the organic light emitting part is hardly deteriorated.
- (A) is a sectional side view of an organic EL element according to an embodiment of the present invention
- (b) is a top view of an organic EL substrate of the organic EL element
- (c) is a sealing cap substrate of the organic EL element.
- Bottom view, (d) is the top view.
- or (k) are sectional side views for demonstrating the manufacturing method of the organic EL element.
- (A) is a sectional side view of an organic EL element according to a modification of the above embodiment
- (b) is a top view of an organic EL substrate of the organic EL element
- (c) is a sealing cap substrate of the organic EL element.
- Bottom view, (d) is the top view.
- FIG. 4D is a side sectional view of the organic EL element including a cross section taken along line BB in FIG.
- the organic EL element 1 of the present embodiment includes an organic EL substrate 4 having an organic light emitting unit 3 formed on one surface of a translucent substrate 2, and the organic EL substrate 4.
- a sealing cap substrate 5 that is provided and seals the organic light emitting unit 3.
- the translucent substrate 2 is a planar rectangular plate having translucency.
- a rigid glass plate such as soda glass or non-alkali glass, or a flexible plastic plate such as polycarbonate or polyethylene terephthalate is used.
- the lower electrode 31 is patterned on the translucent substrate 2, and the organic light emitting unit 3 is formed so as to straddle part of the translucent substrate 2 and the lower electrode 31.
- the organic light emitting unit 3 and the lower electrode 31 are formed.
- the upper electrodes 32 are respectively formed on the portions where the organic light emitting portion 3 is not formed.
- the lower electrode 31 includes a positive electrode 31a and a negative electrode 31b connected to the hole injection side and the electron injection side of the organic light emitting unit 3, respectively.
- the positive electrode 31 a is formed in a relatively wide region including the central portion of the translucent substrate 2.
- the negative electrode 31b is formed on the translucent substrate 2 at a predetermined interval from the positive electrode 31a so as to be insulated from the positive electrode 31a. Further, the positive electrode 31 a and the negative electrode 31 b are formed at a certain interval from the periphery of the translucent substrate 2.
- the lower electrode 31 including the positive electrode 31a and the negative electrode 31b is formed of a conductive material having translucency such as ITO, IZO, tin oxide, or zinc oxide.
- the organic light emitting unit 3 is formed so as to straddle the positive electrode 31a and the translucent substrate 2 located between the positive electrode 31a and the negative electrode 31b. At this time, the organic light emitting unit 3 is not formed at the end of the positive electrode 31a opposite to the end close to the negative electrode 31b.
- the organic light emitting unit 3 is, for example, a multilayer film in which a hole injection layer, a hole transport layer, a light emitting layer containing an organic light emitting material, an electron transport layer, and an electron injection layer are laminated in this order from the positive electrode 31a side. Formed as. As materials constituting these layers, organic materials that are widely used in the technical field of organic EL elements are appropriately used.
- the upper electrode 32 also includes a positive electrode 32a and a negative electrode 32b connected to the hole injection side and the electron injection side of the organic light emitting unit 3, respectively.
- the positive electrode 32 a is formed on the portion of the positive electrode 31 a of the lower electrode 31 where the organic light emitting unit 3 is not formed so as not to contact the organic light emitting unit 3.
- the negative electrode 32 b is formed on the organic light emitting unit 3 and the negative electrode 31 b of the lower electrode 31 so as to straddle them.
- the upper electrode 32 composed of the positive electrode 32a and the negative electrode 32b is formed of a conductive metal material having light reflectivity such as aluminum, silver or magnesium.
- the central region of the organic EL substrate 4 has a configuration in which the lower electrode 31, the organic light emitting unit 3 and the upper electrode 32 are stacked.
- region becomes a structure where the positive electrodes 31a and 32a and the negative electrodes 31b and 32b were laminated
- substrate 5 functions as 1st electrode extraction pad 7a, 7b of the organic electroluminescent board
- the first electrode extraction pads 7 a and 7 b have a structure in which the upper electrode 32 is laminated on the lower electrode 31, for example, if these are formed by a vacuum deposition method or the like, the first electrode extraction pads 7 a and 7 b are formed from the upper surface of the translucent substrate 2. Are equal to each other, and the respective upper surfaces are on the same plane (see also FIG. 1A).
- a first bonding portion 40 is formed on the peripheral portion of the translucent substrate 4 so as to surround the organic light emitting portion 3 with a predetermined distance from the lower electrode 31.
- the first joint portion 40 is formed to have the same thickness as the thickness of the lower electrode 31 and the upper electrode 32 laminated. If it carries out like this, each upper surface of 1st electrode extraction pad 7a, 7b and the 1st junction part 40 will exist on the same plane.
- the 1st junction part 40 is formed from metal materials, such as gold
- the sealing cap substrate 5 is positioned opposite to the sealing substrate 6 having substantially the same shape as the translucent substrate 2 and the first electrode extraction pads 7a and 7b. And second electrode extraction pads 8a and 8b.
- the sealing substrate 6 has a recess 61 formed at a position facing the organic light emitting unit 3.
- the recess 61 is configured such that the upper electrode 32 (negative electrode 32b) protruding depending on the thickness of the organic light emitting unit 3 contacts the sealing substrate 6 in a state where the organic EL substrate 4 and the sealing cap substrate 5 are joined.
- the sealing substrate 6 has through-holes 62 formed so as to penetrate from the second electrode extraction pads 8a and 8b to the side opposite to the organic EL substrate 4, respectively.
- the sealing cap substrate 5 is disposed in each through hole 62 and is electrically connected to the second electrode extraction pads 8a and 8b, respectively, and at positions facing the first joint portion 40. And a second joint portion 50 provided. Similar to the first electrode extraction pads 7a and 7b (upper electrode 32), the second electrode extraction pads 8a and 8b are formed of a conductive metal material such as aluminum, silver or magnesium.
- the through-wirings 9 a and 9 b and the second joint portion 50 are formed of a metal material such as gold, platinum, aluminum, silver, copper, or magnesium, like the first joint portion 40.
- the second electrode extraction pads 8a and 8b and the second bonding portion 50 are simultaneously patterned using the same material. If it carries out like this, the upper surface of 2nd electrode extraction pad 8a, 8b and the 2nd junction part 50 will exist on the same plane. Further, the manufacturing efficiency can be improved as compared with the case where the second electrode extraction pads 8a and 8b and the second bonding portion 50 are formed individually.
- the 1st junction part 40 and the 2nd junction part 40 are joined by surface activation joining, and the sealing cap board
- the light emitting unit 3 is sealed.
- the bonding surface is sputter-etched with an ion beam or plasma (inert gas such as argon gas) or the like, and the bonding surface is in an active state having a high bonding force with other atoms.
- This is a bonding method in which atomic bonds are directly bonded to each other. According to this surface activated bonding, for example, a strong bond can be obtained even at room temperature.
- the organic EL element 1 wiring for supplying power to the organic light emitting unit 3 is provided via the second electrode extraction pads 8a and 8b and the through wirings 9a and 9b provided on the sealing cap substrate 5. Therefore, there are no extraction electrodes, wirings, or the like at the bonding interface between the first bonding portion 40 and the second bonding portion 40, and the organic EL substrate 4 and the sealing cap substrate 5 are hermetically bonded by surface activation bonding. Can be done. Therefore, compared with the case where the sealing cap substrate is resin-bonded to the organic EL substrate, the organic light emitting unit 3 can be more reliably sealed, and the deterioration of the organic material used for the organic light emitting unit 3 can be suppressed. it can.
- the organic EL substrate 4 and the sealing cap substrate 5 can be bonded at room temperature, the organic light emitting unit 3 is not exposed to heat at the time of bonding, thereby suppressing the modification of the organic material in the manufacturing process.
- the organic light emitting unit 3 is difficult to deteriorate.
- the upper surfaces of the first electrode extraction pads 7a and 7b and the first bonding portion 40 are on the same plane, and the second electrode extraction pads 8a and 8b and the second bonding electrode 40 are in the same plane.
- Each upper surface of the part 50 exists on the same plane. Therefore, the connection surfaces of the first electrode extraction pads 7a and 7b and the second electrode extraction pads 8a and 8b exist on the same plane as the bonding interface of the first bonding portion 40 and the second bonding portion 50. Therefore, if the 1st junction part 40 and the 2nd junction part 40 are joined, the connection surface of 1st electrode extraction pad 7a, 7b and 2nd electrode extraction pad 8a, 8b will be electrically connected simultaneously with joining. Connected to.
- first electrode extraction pads 7a and 7b of the organic EL substrate 4 and the second electrode extraction pads 8a and 8b of the sealing cap substrate 5 are connected to the first bonding portion 40 and the second bonding portion 50, respectively. Similarly, it can be joined by surface activated joining. By doing so, the connection between the first electrode extraction pads 7a and 7b and the second electrode extraction pads 8a and 8b is strengthened, and the bonding between the organic EL substrate 4 and the sealing cap substrate 5 is also strengthened. Can do.
- a method for manufacturing the organic EL element 1 will be described with reference to FIG. First, on a planar light-transmitting substrate 2 as shown in FIG. 2A, as shown in FIG. 2B, a positive electrode 31a and a negative electrode 31b for supplying power to the organic light emitting unit 3 are formed.
- the lower electrode 31 corresponding to each is formed.
- the lower electrode 31 is formed by depositing a conductive layer on the translucent substrate 2 by using a vacuum deposition method, a sputtering method, a coating method, or the like, and then patterning by a lift-off method or an etching method using a photolithography technique. Is formed.
- FIG. 2B a method for manufacturing the organic EL element 1 will be described with reference to FIG. First, on a planar light-transmitting substrate 2 as shown in FIG. 2A, as shown in FIG. 2B, a positive electrode 31a and a negative electrode 31b for supplying power to the organic light emitting unit 3 are formed.
- the organic light emitting unit 3 is formed so as to straddle the translucent substrate 2 and the lower electrode 31.
- the organic light emitting unit 3 is formed by forming the above-described hole transport layer, light emitting layer, and the like into a predetermined shape using a predetermined metal mask using a technique such as vacuum deposition or coating.
- the upper electrode 32 (positive electrode 32 a and negative electrode 32 b) is formed on the lower electrode 31 and the organic light emitting unit 3, and the organic light emitting unit 3 in these upper electrodes 32.
- the portions where no is provided are defined as first electrode extraction pads 7a and 7b.
- the upper electrode 32 is formed using a technique such as a vacuum deposition method or a sputtering method.
- a first bonding portion 40 is formed on the periphery of the translucent substrate 2 so as to be flush with the upper electrode 32.
- the first bonding portion 40 is formed by patterning using a metal mask, photolithography, or the like based on a technique such as a vacuum evaporation method or a sputtering method.
- the organic EL substrate 4 is produced through these steps.
- FIG. 2 (g) using a sealing substrate 6 having substantially the same shape as the translucent substrate 2 as shown in FIG.
- a recess 61 is formed at a position facing the light emitting unit 3.
- FIG. 2 (h) a through hole 62 is formed in the sealing substrate 6 at a position facing the first electrode extraction pads 7a and 7b.
- the recess 61 and the through hole 62 are processed using a technique such as photoblasting.
- through wirings 9 a and 9 b are formed in these through holes 62.
- the through wirings 9a and 9b are formed by filling with plating after forming a film using a technique such as a vacuum deposition method or a sputtering method. Then, as shown in FIG. 2 (j), the second bonding portion 50 and the second bonding portion of the sealing substrate 6 are disposed at positions facing the first bonding portion 40 and the first electrode extraction pads 7a and 7b, respectively.
- the electrode extraction pads 8a and 8b are formed.
- the second bonding portion 50 and the second electrode extraction pads 8a and 8b are formed by patterning using a metal mask, photolithography, or the like based on a technique such as vacuum deposition or sputtering.
- the sealing cap substrate 5 is manufactured through these steps.
- the organic EL substrate 4 and the sealing cap substrate 5 are in contact with the first electrode extraction pads 7a and 7b and the second electrode extraction pads 8a and 8b.
- the first joint 40 and the second joint 50 are joined by surface activation joining.
- the organic EL element 1 is produced by these steps.
- the organic EL element 1 uses one or both of the lower electrode 31 and the upper electrode 32 for supplying power to the organic light emitting unit 3 as the first bonding portion 40a.
- the first joint portion 40a includes a lower member 41 having the same configuration as the lower electrode 31 (positive electrode 31a and negative electrode 31b), and an upper electrode 32 (positive electrode 32a and negative electrode 32b). It is formed by the upper member 42 having the same configuration.
- the lower member 41 and the upper member 42 are formed simultaneously with the lower electrode 31 and the upper electrode 32.
- Other configurations are the same as in the above embodiment.
- the process of separately forming the first joint portion 40a is not necessary, and the manufacturing efficiency can be improved. Further, for example, in the above-described embodiment, if the height of the first joint portion 40 from the translucent substrate 2 is too high, the first joint portion 40 and the second joint portion 50 are joined at the first time. The electrode extraction pads 7a and 7b are not in contact with the second electrode extraction pads 8a and 8b. On the other hand, if the height of the first joint 40 is too low, the first joint 40 and the second joint 50 cannot be joined.
- the height of the upper surface of the upper member 42 which is the bonding interface with the second bonding portion 50 of the sealing cap substrate 5 is precisely set to the first electrode extraction pad 7a, It can be the same height as 7b. Therefore, the hermetic bonding between the organic EL substrate 4 and the sealing cap substrate 5 can be more reliably performed by the surface activation bonding.
- the first bonding portion 40b is formed integrally with the first electrode extraction pads 7a and 7b.
- the second joint portion 50a is formed integrally with the second electrode extraction pads 8a and 8b.
- the first joint portion 40b is formed integrally with the first electrode extraction pad 7b (negative electrodes 31b and 32b).
- the second bonding portion 50a is formed integrally with the second electrode extraction pad 8b that is electrically connected to the first electrode extraction pad 7b.
- Other configurations are the same as those of the above modification.
- the lower member 41 and the upper member 42 are formed at the same time as the lower electrode 31 and the upper electrode 32, but a predetermined interval is provided therebetween.
- the negative electrodes 31b and 32b and the first joint portion 40b are integrally formed, and no interval is provided therebetween. That is, if the positive electrodes 31a, 32a and the negative electrodes 31b, 32b are insulated, the first joint portion 40b is connected to one of the negative electrodes 31b, 32b or the positive electrodes 31a, 32a. Even if it is, an appropriate electric current can be sent through the organic light emitting unit 3.
- the entire element can be reduced in size without changing the size of the organic light emitting unit 3.
- the organic EL substrate 4 and the sealing cap substrate 5 include a pair of electrode extraction pads corresponding to the positive electrode and the negative electrode connected to the one organic light emitting unit 3.
- a plurality of pairs of electrode extraction pads may be provided.
- a light reflecting layer may be formed in the recess 61 of the sealing cap substrate 5.
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Abstract
Description
2 透光性基板
3 有機発光部
31 上部電極
31a 正電極
31b 負電極
32 下部電極
32a 正電極
32b 負電極
4 有機EL基板
40 第1の接合部
40a 第1の接合部
40b 第1の接合部
5 封止キャップ基板
50 第2の接合部
50a 第2の接合部
61 凹部
62 貫通孔
7a 第1の電極取出しパッド(正電極)
7b 第1の電極取出しパッド(負電極)
8a 第2の電極取出しパッド(正電極)
8b 第2の電極取出しパッド(負電極)
9a 貫通配線(正電極)
9b 貫通配線(負電極)
Claims (5)
- 透光性基板の一面に設けられた有機発光部を有する有機EL基板と、前記有機EL基板上に設けられて前記有機発光部を封止する封止キャップ基板と、を備えた有機EL素子であって、
前記有機EL基板は、前記有機発光部に給電する下部電極及び上部電極と、これら電極自体に設けられた第1の電極取出しパッドと、前記透光性基板の周縁部に設けられた第1の接合部と、を有し、
前記封止キャップ基板は、前記有機発光部に対向する位置に設けられた凹部と、前記第1の電極取出しパッドと対向する位置に設けられた第2の電極取出しパッドと、前記第2の電極取出しパッドから前記有機EL基板とは反対側へ該封止キャップ基板を貫通するように設けられた貫通配線と、前記第1の接合部と対向する位置に設けられた第2の接合部と、を有し、
前記第1の接合部及び第2の接合部は、表面活性化接合によって接合されていることを特徴とする有機EL素子。 - 前記第1の電極取出しパッド及び第2の電極取出しパッドの接続面が、前記第1の接合部及び第2の接合部の接合界面と同一平面に存在していることを特徴とする請求項1に記載の有機EL素子。
- 前記第1の接合部は、前記下部電極及び上部電極のいずれか一方又は両方を用いていることを特徴とする請求項1又は請求項2に記載の有機EL素子。
- 前記第1の接合部は、前記第1の電極取出しパッドと一体的に形成され、
前記第2の接合部は、前記第2の電極取出しパッドと一体的に形成されていることを特徴とする請求項3に記載の有機EL素子。 - 透光性基板上に有機発光部に給電するための正電極及び負電極の夫々に対応する下部電極を形成する工程と、
前記透光性基板上及び下部電極上に跨るように有機発光部を形成する工程と、
前記下部電極上及び有機発光部上に、上部電極を形成し、且つ該上部電極における前記有機発光部が設けられていない部分を第1の電極取出しパッドとする工程と、
前記透光性基板の周縁部に、前記上部電極と同一平面となるように、第1の接合部を形成する工程と、
前記有機発光部を封止する封止キャップ基板の、前記有機発光部と対向する位置に凹部を形成する工程と、
前記封止キャップ基板の、前記第1の電極取出しパッドと対向する位置に貫通孔を形成する工程と、
前記貫通孔に貫通配線を形成する工程と、
前記封止キャップ基板の、前記第1の接合部及び第1の電極取出しパッドと対向する位置に、夫々第2の接合部及び第2の電極取出しパッドを形成する工程と、
前記第1の電極取出しパッドと第2の電極取出しパッドとが接した状態で、前記第1の接合部と第2の接合部とを表面活性化接合によって接合する工程と、を含むことを特徴とする有機EL素子の製造方法。
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JP2013537405A JP5662586B2 (ja) | 2011-10-04 | 2012-10-01 | 有機el素子及びその製造方法 |
US14/342,695 US20140217391A1 (en) | 2011-10-04 | 2012-10-01 | Organic el element and method for manufacturing same |
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