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Prodn. of organic electrical lighting device

An electroluminescent device, organic technology, applied in electroluminescent light sources, semiconductor/solid-state device manufacturing, electro-solid-state devices and other directions, can solve the problem of pixel size limitation, high operating voltage, inapplicability, etc., to achieve high cancellation costs, The effect of improving yield and improving resolution

Inactive Publication Date: 2004-06-16
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Other display technologies have either not yet reached the maturity level for technical application, such as the flat cathode ray tube (CRT), or their application, first of all in portable electronic devices, is based on their specific parameters with the following significant disadvantages: High operating voltage in fluorescent displays and inorganic thin-film electroluminescent displays and expensive manufacturing of displays based on inorganic light-emitting diodes
The disadvantage of this structure is that it is not suitable for preparing symbols of arbitrary shape
In addition, the size of each pixel is limited by the height of the wall
Therefore, large-area display cannot be realized in this way.

Method used

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  • Prodn. of organic electrical lighting device
  • Prodn. of organic electrical lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of OLED-displays with photosensitive first layer

[0053] The process of preparing the display is as follows:

[0054] 1. Structuring of a flat glass plate coated with indium-tin-oxide (ITO) by photographic methods followed by wet chemical etching to form parallel circuits with a width of about 200 μm and an intermediate space of about 50 μm . The circuits are each about 2 cm long and optionally contain attachments for contacting at their outer ends. The photoresist used during structuring is then completely removed.

[0055] 2. Heat the glass plate at 250°C for about 1 hour, and then spin-coat commercial photosensitive adhesive based on polyglutarimide (coating at 700 rpm for 10 seconds, and at 4000 Centrifuge the gel for 30 seconds at 1 rpm). The obtained layer was dried on a hot plate at 250° C. for 170 seconds. Then use light with a wavelength of 248nm (polychromatic) at 1000mJ / cm 2 The amount of light for spot exposure. Thereafter, a commercial p...

Embodiment 2

[0060] Fabrication of OLED displays with non-photosensitive first layer

[0061] The process of preparing the display is as follows:

[0062] 1. A glass plate coated over the entire surface with indium-tin-oxide (ITO) is structured by means of photographic methods and wet-chemical etching to produce parallel circuits with a width of approximately 200 μm and a spacing of approximately 50 μm. The circuits are each approximately 2 cm long and may have attachments for contacting at their outer ends. The photoresist used in structuring is completely removed.

[0063]2. Heat the glass plate at 250°C for about 1 hour, then spin coat a commercial non-photosensitive polyimide by centrifugation at 5000 rpm for 30 seconds. The obtained layer was dried on a hot plate at 100° C. for 90 seconds (layer thickness: 10 μm). Thereafter, a phenolic resin / diazoquinone (diluted in a ratio of 10:1 with (1-methoxy-2-propyl)-acetate) was spin-coated at 2000 rpm. Commercial photoresist takes about ...

Embodiment 3

[0068] Preparation of organic light-emitting diodes according to the prior art and the present invention

[0069] Two samples were prepared, one using a common mask (sample A) and the other using the method of the present invention (sample B).

[0070] Sample A:

[0071] Circuits 2 mm wide were produced using known photographic methods on indium-tin-oxide-coated glass plates. Thereafter, at 10 -5 A layer of N,N'-bis(3-methyl-phenyl)-N,N'-bis(phenyl)-benzidine (m-TPD) was deposited with a thickness of 135 nm under mbar pressure. layer. Without breaking the vacuum, a quinoline-aluminum(III)-salt (Alq) layer was then deposited to a thickness of 65 nm. Here, thermal evaporation ("physical vapor deposition", PVD) is employed (deposition rate: respectively 0.2 nm / s). A layer of magnesium with a thickness of 100 nm and then a layer of silver with a thickness of 100 nm was deposited using a mask, resulting in a 2 nm wide metal circuit (pressure: 10 -5 mbar, deposition rate: 1 nm...

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Abstract

A method for producing organic electroluminescent components having a structured electrode, in particular displays having a structured metal electrode, includes the following steps: At least two layers are applied onto a bottom electrode which is located on a substrate. The first layer is electrically insulating and is not damaged when the second layer is applied. A defined boundary remains between the two layers. The first layer has a higher solubility rate in a liquid developer than the second layer and it is possible to structure the second layer. The second layer is structured and the structure is transferred to the first layer. At least one organic functional layer is applied onto the second layer. A top electrode is deposited onto the organic functional layer.

Description

technical field [0001] The invention relates to a method for manufacturing an organic electroluminescent device with structured electrodes, in particular a display with structured metal electrodes. Background technique [0002] As data and information are exchanged more and more frequently, their representation, preferably on a communication terminal, becomes more and more important. Such an information presentation is usually carried out with a pixel-matrix display device, which may also have an additional, fixed, predefined symbol display ("image"). Known technologies of pixel-matrix display devices, such as cathode ray tubes, obviously cannot be considered for use in mobile and portable electronic devices for reasons of space, power consumption and weight. For this purpose, flat graphic display screens (“flat panel displays”) are suitable, which are currently mainly based on liquid crystal displays. [0003] Simple monochrome passive-matrix-driven liquid crystal display...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/26C09D179/08G09F9/30H01L27/32H01L51/50H01L51/52H05B33/10H05B33/12H05B33/14H05B33/22
CPCH01L27/3283H10K59/173
Inventor 沃尔特劳德·赫布斯特雷纳·勒施纳埃瓦尔德·冈瑟于尔根·西姆梅勒
Owner OSRAM GMBH
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