[go: up one dir, main page]

WO1999007189A1 - Electroluminescent device production process - Google Patents

Electroluminescent device production process Download PDF

Info

Publication number
WO1999007189A1
WO1999007189A1 PCT/GB1998/002211 GB9802211W WO9907189A1 WO 1999007189 A1 WO1999007189 A1 WO 1999007189A1 GB 9802211 W GB9802211 W GB 9802211W WO 9907189 A1 WO9907189 A1 WO 9907189A1
Authority
WO
WIPO (PCT)
Prior art keywords
printing
electroluminescent device
producing
light emitting
emitting polymer
Prior art date
Application number
PCT/GB1998/002211
Other languages
French (fr)
Other versions
WO1999007189A9 (en
Inventor
Christopher John Andrew Barnardo
Janet Elizabeth Townsend
Kavita Singhal
Original Assignee
Cambridge Consultants Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cambridge Consultants Limited filed Critical Cambridge Consultants Limited
Priority to EP98935209A priority Critical patent/EP0931435A1/en
Publication of WO1999007189A1 publication Critical patent/WO1999007189A1/en
Publication of WO1999007189A9 publication Critical patent/WO1999007189A9/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/10—Deposition of organic active material
    • H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
    • H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing

Definitions

  • the present invention relates to a method for producing electroluminescent devices from Light Emitting Polymers (LEPs) in which a light emitting layer is sandwiched between conducting layers .
  • LEPs Light Emitting Polymers
  • Electroluminescent (EL) devices comprising an active LEP layer sandwiched between conductive layers are known in the art (see, for example WO-A-90 / 13148) .
  • WO-A-90 / 13148 discloses a class of Light Emitting Polymers
  • LEPs consisting of conjugated polymers such as poly(p- phenlenevinyline) (PPV) and possible substitutes which may, amongst other things, be used for the production of EL devices.
  • Other LEPs are known which consist of a single material which may be applied to a surface and which can be induced to emit light by the application of a voltage. LEPs have been relatively recently discovered and are treated with a great deal of care by persons skilled in the art - such treatment involving the use of vacuum cabinets, specialised atmospheres (pure nitrogen etc.) and so on.
  • suspension materials which have such light emitting characteristics. These other materials consist of small solid particles suspended in a binder. Examples of such materials include suspensions of phosphor in a polymer medium chosen for its ease of evaporation or of conversion to form readily a usable, solid, layer of light emitting matter. These suspension materials are more widely known in the art than LEPs and are perceived as being robust, i.e. these materials do not need the special treatment involved in handling LEPs. Methods for the production of devices using such suspension materials include the use of single-stage, direct application printing processes such as screen-printing (see, for example, EP-A-0 357 443, US-A-4 614 668, US-A-4 665 342).
  • roller printing for the printing of such phospher layers was mentioned in passing in EP-A-357 443, although the disclosure of this patent concentrates on the screen-printing of such phosphor layer devices .
  • the suspension substances are subsequently converted to rigid form by heating under controlled environments such as in nitrogen, in a vacuum or by exposing to ultraviolet light.
  • known methods of producing EL devices from LEPs consist of specialised methods such as spin coating, draw coating, melt processing, ion-beam sputtering, radio frequency sputtering, DC sputtering, depositing by evaporation or glow discharge of silane and evaporation of the material onto a substrate (see WO-A-90 / 13148 which extensively describes the various applicable methods for applying LEPs to substrates) .
  • These methods are clearly appropriate for a specialised material such as an LEP which needs careful treatment as mentioned above.
  • any solvent used with such LEPs is highly volatile and that the mix which is to be deposited should have as low a viscosity as possible.
  • methanol has been used as a solvent in the prior art.
  • LEPs have to be treated with great care and applied to surfaces using complex, expensive, slow processes, as detailed above, which are, in any case, only workable for a relatively small surface area . It is desirable to produce layers of LEP which are thin and uniform - both from the point of view of cost of the material applied and of operational efficiency - and which may be produced over relatively large surface areas in a cost-effective manner.
  • the screen-printing processes used with suspension materials have not been considered to be suitable for the application of LEPs to substrates, given the care that is involved in handling such materials in the prior art and given the peception that screen-printing would produce a layer that was of the order of 100 times too thick to be of any use.
  • LEPs Another disadvantage associated with LEPs is their short lifetime, making them unsuitable for such applications as cathode ray tube replacements .
  • Printing processes such as letter-press printing, screen- printing, doctor blade coating, ink-jet printing, roller printing, reverse-roller printing, offset lithographic printing, flexographic printing and web offset printing are known in the art of printing text on paper and various other domains.
  • Screen-printing for applying robust, suspension materials in order to create electroluminescent devices is also known in the art, as mentioned above.
  • the present invention involves the novel and inventive use of known printing processes in order to apply known LEPs to a substrate.
  • an offset lithographic printing process may be used to apply an LEP to a substrate with the new, surprising effect that such electroluminescent devices work and may be produced in this way with hitherto unthought of accuracy, in exceptionally thin, uniform layers and using a process which is well- understood, very cheap and very fast.
  • Figure 1 A schematic representation of the offset lithographic printing process.
  • Figure 2 A schematic of an example of a complete LEP sheet structure
  • Figure 3 A schematic of a second example of a complete LEP sheet structure
  • the invention is based on the novel and inventive development that some or all the components needed to form an electroluminescent device from LEPs can be formed by printing using a standard printing process, such as multiple-stage printing processes like the offset lithographic processes widely used for low cost high volume printing.
  • This method enables large volumes of electroluminescent displays to be produced in a much simpler and cost effective manner than has previously been known.
  • the offset lithographic printing process is a method of depositing inks on a substrate by transferring ink initially from a printing plate on to a cylinder covered with a special compressible blanket, which enables a very thin and even coating to be obtained.
  • the offset blanket further splits the ink film between the printing plate and the blanket which results in a thinner ink film being deposited on a substrate.
  • the printing plate may be patterned to accept or repel the ink by using hydrophilic and hydrophobic regions .
  • the regions which are non-miscible with the ink i.e. the hydrophobic regions
  • ink adheres only to the appropriately patterned layer and repeats the pattern when transferred to the substrate.
  • the viscosity and volatility of a solvent used for the liquid which is to be printed using the offset lithographic process must be such that not only does it deliver the ink onto the rollers but also such that it is not adversely affected by the printing processes, for example, such that it does not evaporate from the rollers .
  • high volatility, low viscosity solvents such as methanol (as mentioned above)
  • the present inventors have successfully and surprisingly used low volatility, higher viscosity solvents to great effect.
  • Persons skilled in the art would also not have considered the possibility of using such solvents as a transport medium for the particular components to be printed such as the active light emitting layer (e.g. a PPV precursor polymer) , conductive polymer and/or barrier materials .
  • a highly polar solvent such as water enables the light emitting layers to be deposited in a pattern using the conventional planographic nature of offset lithographic printing.
  • the evaporation rate and viscosity of the solvent may be controlled by active temperature control of the rollers comprising the printing press .
  • the PPV mix, ink ducts or substrates may be preheated. Heating or cooling in this manner also provides additional control over the curing process of components such as that of the PPV precursor polymers .
  • Atmosphere control over the printing press assists in curing of the compounds in question, for example, applying a vacuum or excluding oxygen by applying a nitrogen blanket around the press . Where needed printed sheets may be heated for a period in order to initiate the cure process needed for to convert a PPV precursor polymer.
  • Figure 1 shows a schematic depiction of the offset lithographic printing process.
  • the offset lithographic process is a method well suited to producing very thin layers of ink. Furthermore, the process achieves substantially higher resolution than other printing processes .
  • Very thin flat layers of active layer in an EL device are beneficial in that they consume less power. Also, the ability to apply LEPs with very high resolution enables the production of high quality displays of uniform brightness . Depositing multiple layers of the same material or of different materials in sequence enables the complete structure to be built in a controlled manner to give optimum performance.
  • a solution of precursor PPV in water may be prepared according to standard practices used for creating methanol based solutions (see e.g. J.H.Burroughes et al, Light emitting diodes based on conjugated polymers, Nature vol.347, pp.539- 541, October 1990) .
  • An aqueous solvent combines the characteristics of a polar solvent, low volatility and adequate solubility for the solution processable PPV precursor.
  • concentrations of PPV precursor in solution could be used including completely saturated solutions.
  • the solution of PPV precursor is placed in the ink duct [1] and transferred in the standard manner over rollers [2] before forming an even film over the printing plate [3], being transferred to the compressible blanket [4] then transferred to sheets of substrate material [5] passing over the compressible blanket [4] .
  • immiscible liquid [6] may be delivered simultaneously via an set of damper rollers [7] .
  • Sheets of polyester [8] coated with a conducting layer of indium tin oxide (ITO ) [9] may be used as a substrate.
  • a uniform layer of LEP [10] is deposited over the complete sheet which could be passed through the print press several times to achieve the desired thickness of PPV material .
  • Each layer deposited in this manner gives a thickness of the order of lOnm. Such thicknesses are about ten times thinner than than the thinnest layers which could be applied using prior art methods .
  • the PPV precursor may be cured using conventional methods, e.g. by heating in an oven with a controlled atmosphere of nitrogen.
  • a top electrode of aluminium [11] may be deposited on the printed active layer by standard processes such as spinning, thermal evaporation or sputtering or the electrode may be printed on in a similar manner to that used for applying the PPV layer.
  • Additional layers such as conductive polymers [12] , charge-trapping or charge-diffusion layers [13] between the active layer and the conductive layers, or barrier films [14] surrounding the device can be employed to enhance efficiency, reduce power requirements or increase lifetime.
  • Suitable completed structures may be as shown in Figures 2 and 3.
  • Suitable operating voltages for such EL devices start as low as 5V.
  • Light Emitting Polymers have been described with reference to a particular class of of conjugated polymers such as poly (p-phenlenevinyline) (PPV), , it is not intended that the claims should be limited by this.
  • Light Emitting Polymer is used as a term to describes materials consisting of a single substance and having electroluminescent characteristics .
  • the present invention leads to the ability to produce large quantities of accurately formed electroluminescent devices at very low cost. Such an ability can potentially drastically change the whole area of display technology. It would now be possible to produce low cost, disposable, flat TV and computer screens as well as extending the possible areas of application of electroluminescent displays to such areas as packaging, moving picture instruction labels, business cards, magazine covers, identity cards, menus, anticounterfeiting devices, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The present invention provides a method of producing an electroluminescent device which comprises the steps of applying a first conductive electrode to a substrate using a standard printing process to apply a Light Emitting Polymer on top of though not necessarily adjacent to said first electrode applying a second conductive electrode on top of though not necessarily adjacent to said Light Emitting Polymer whereby an accurately-placed layer of Light Emitting Polymer of controllable thickness is formed using a method which is as fast and cost-effective as desired.

Description

Electroluminescent device production process
Field of the invention
The present invention relates to a method for producing electroluminescent devices from Light Emitting Polymers (LEPs) in which a light emitting layer is sandwiched between conducting layers .
Background Art
Electroluminescent (EL) devices comprising an active LEP layer sandwiched between conductive layers are known in the art (see, for example WO-A-90 / 13148) .
WO-A-90 / 13148 discloses a class of Light Emitting Polymers
(LEPs) consisting of conjugated polymers such as poly(p- phenlenevinyline) (PPV) and possible substitutes which may, amongst other things, be used for the production of EL devices. Other LEPs are known which consist of a single material which may be applied to a surface and which can be induced to emit light by the application of a voltage. LEPs have been relatively recently discovered and are treated with a great deal of care by persons skilled in the art - such treatment involving the use of vacuum cabinets, specialised atmospheres (pure nitrogen etc.) and so on.
Other materials are known which have such light emitting characteristics. These other materials consist of small solid particles suspended in a binder. Examples of such materials include suspensions of phosphor in a polymer medium chosen for its ease of evaporation or of conversion to form readily a usable, solid, layer of light emitting matter. These suspension materials are more widely known in the art than LEPs and are perceived as being robust, i.e. these materials do not need the special treatment involved in handling LEPs. Methods for the production of devices using such suspension materials include the use of single-stage, direct application printing processes such as screen-printing (see, for example, EP-A-0 357 443, US-A-4 614 668, US-A-4 665 342). The general possibility of using roller printing for the printing of such phospher layers was mentioned in passing in EP-A-357 443, although the disclosure of this patent concentrates on the screen-printing of such phosphor layer devices . The suspension substances are subsequently converted to rigid form by heating under controlled environments such as in nitrogen, in a vacuum or by exposing to ultraviolet light.
By contrast, known methods of producing EL devices from LEPs consist of specialised methods such as spin coating, draw coating, melt processing, ion-beam sputtering, radio frequency sputtering, DC sputtering, depositing by evaporation or glow discharge of silane and evaporation of the material onto a substrate (see WO-A-90 / 13148 which extensively describes the various applicable methods for applying LEPs to substrates) . These methods are clearly appropriate for a specialised material such as an LEP which needs careful treatment as mentioned above. In order to carry out such application methods, it is desirable that any solvent used with such LEPs is highly volatile and that the mix which is to be deposited should have as low a viscosity as possible. Typically, methanol has been used as a solvent in the prior art.
It is a major disadvantage of these processes that each is only workable for a relatively small surface area.
A further major disadvantage associated with LEPs, at the present time, is that these materials have to be treated with great care and applied to surfaces using complex, expensive, slow processes, as detailed above, which are, in any case, only workable for a relatively small surface area . It is desirable to produce layers of LEP which are thin and uniform - both from the point of view of cost of the material applied and of operational efficiency - and which may be produced over relatively large surface areas in a cost-effective manner. The screen-printing processes used with suspension materials have not been considered to be suitable for the application of LEPs to substrates, given the care that is involved in handling such materials in the prior art and given the peception that screen-printing would produce a layer that was of the order of 100 times too thick to be of any use.
Another disadvantage associated with LEPs is their short lifetime, making them unsuitable for such applications as cathode ray tube replacements .
Printing processes such as letter-press printing, screen- printing, doctor blade coating, ink-jet printing, roller printing, reverse-roller printing, offset lithographic printing, flexographic printing and web offset printing are known in the art of printing text on paper and various other domains. The use of screen-printing for applying robust, suspension materials in order to create electroluminescent devices is also known in the art, as mentioned above.
Summary of the Invention
The present invention involves the novel and inventive use of known printing processes in order to apply known LEPs to a substrate.
The prior art clearly leads a person skilled in the art away from the use of printing processes for the application of LEPs to surfaces, as mentioned above. Given this situation, the person skilled in the art would not even consider carrying out experiments to determine whether it were possible to print LEPs using standard printing processes .
Also, the person skilled in the art would not and could not appreciate that the use of, for example, an offset lithographic printing process may be used to apply an LEP to a substrate with the new, surprising effect that such electroluminescent devices work and may be produced in this way with hitherto unthought of accuracy, in exceptionally thin, uniform layers and using a process which is well- understood, very cheap and very fast.
Further aspects, advantages and objectives of the invention will become apparent from a consideration of the drawings and the ensuing description, which, by way of example, describe an embodiment of the present invention in which poly(p- phenlenevinyline) (PPVs) are applied to a substrate using offset lithographic printing:
Brief Description of Drawings
Figure 1: A schematic representation of the offset lithographic printing process.
Figure 2 : A schematic of an example of a complete LEP sheet structure Figure 3 : A schematic of a second example of a complete LEP sheet structure
Detailed description of the invention
The invention is based on the novel and inventive development that some or all the components needed to form an electroluminescent device from LEPs can be formed by printing using a standard printing process, such as multiple-stage printing processes like the offset lithographic processes widely used for low cost high volume printing. This method enables large volumes of electroluminescent displays to be produced in a much simpler and cost effective manner than has previously been known.
The offset lithographic printing process is a method of depositing inks on a substrate by transferring ink initially from a printing plate on to a cylinder covered with a special compressible blanket, which enables a very thin and even coating to be obtained. The offset blanket further splits the ink film between the printing plate and the blanket which results in a thinner ink film being deposited on a substrate. The printing plate may be patterned to accept or repel the ink by using hydrophilic and hydrophobic regions . The regions which are non-miscible with the ink (i.e. the hydrophobic regions) are deposited at the same time as the ink via damper rollers to wet the plate. Thus, ink adheres only to the appropriately patterned layer and repeats the pattern when transferred to the substrate.
The viscosity and volatility of a solvent used for the liquid which is to be printed using the offset lithographic process must be such that not only does it deliver the ink onto the rollers but also such that it is not adversely affected by the printing processes, for example, such that it does not evaporate from the rollers . In direct opposition to the prior art teaching which teaches the use of high volatility, low viscosity solvents such as methanol (as mentioned above) , the present inventors have successfully and surprisingly used low volatility, higher viscosity solvents to great effect. Persons skilled in the art would also not have considered the possibility of using such solvents as a transport medium for the particular components to be printed such as the active light emitting layer (e.g. a PPV precursor polymer) , conductive polymer and/or barrier materials . A highly polar solvent such as water enables the light emitting layers to be deposited in a pattern using the conventional planographic nature of offset lithographic printing.
The evaporation rate and viscosity of the solvent may be controlled by active temperature control of the rollers comprising the printing press . Alternatively the PPV mix, ink ducts or substrates may be preheated. Heating or cooling in this manner also provides additional control over the curing process of components such as that of the PPV precursor polymers . Atmosphere control over the printing press assists in curing of the compounds in question, for example, applying a vacuum or excluding oxygen by applying a nitrogen blanket around the press . Where needed printed sheets may be heated for a period in order to initiate the cure process needed for to convert a PPV precursor polymer.
Figure 1 shows a schematic depiction of the offset lithographic printing process. The offset lithographic process is a method well suited to producing very thin layers of ink. Furthermore, the process achieves substantially higher resolution than other printing processes .
Very thin flat layers of active layer in an EL device are beneficial in that they consume less power. Also, the ability to apply LEPs with very high resolution enables the production of high quality displays of uniform brightness . Depositing multiple layers of the same material or of different materials in sequence enables the complete structure to be built in a controlled manner to give optimum performance.
A solution of precursor PPV in water may be prepared according to standard practices used for creating methanol based solutions (see e.g. J.H.Burroughes et al, Light emitting diodes based on conjugated polymers, Nature vol.347, pp.539- 541, October 1990) . An aqueous solvent combines the characteristics of a polar solvent, low volatility and adequate solubility for the solution processable PPV precursor. Various concentrations of PPV precursor in solution could be used including completely saturated solutions.
In operation, the solution of PPV precursor is placed in the ink duct [1] and transferred in the standard manner over rollers [2] before forming an even film over the printing plate [3], being transferred to the compressible blanket [4] then transferred to sheets of substrate material [5] passing over the compressible blanket [4] . For patterning, immiscible liquid [6] may be delivered simultaneously via an set of damper rollers [7] .
Sheets of polyester [8] coated with a conducting layer of indium tin oxide (ITO ) [9] may be used as a substrate. A uniform layer of LEP [10] is deposited over the complete sheet which could be passed through the print press several times to achieve the desired thickness of PPV material . Each layer deposited in this manner gives a thickness of the order of lOnm. Such thicknesses are about ten times thinner than than the thinnest layers which could be applied using prior art methods .
The PPV precursor may be cured using conventional methods, e.g. by heating in an oven with a controlled atmosphere of nitrogen.
Subsequently, a top electrode of aluminium [11] may be deposited on the printed active layer by standard processes such as spinning, thermal evaporation or sputtering or the electrode may be printed on in a similar manner to that used for applying the PPV layer. Additional layers such as conductive polymers [12] , charge-trapping or charge-diffusion layers [13] between the active layer and the conductive layers, or barrier films [14] surrounding the device can be employed to enhance efficiency, reduce power requirements or increase lifetime. Suitable completed structures may be as shown in Figures 2 and 3.
Suitable operating voltages for such EL devices start as low as 5V.
Although the invention has been described using the particular embodiment of offset lithographic printing, it is not intended that the claims should be limited by this. Given the teaching of this document and thus overcoming the present technical prejudices to come to the realisation that LEPs can be printed using a standard printing technique, a person skilled in the art would appreciate that any other printing process would also work including, though not limited to letter-press printing, screen-printing, doctor blade coating, roller printing, reverse-roller printing, offset lithographic printing, flexographic printing and web offset printing.
Also, although Light Emitting Polymers have been described with reference to a particular class of of conjugated polymers such as poly (p-phenlenevinyline) (PPV), , it is not intended that the claims should be limited by this. Light Emitting Polymer is used as a term to describes materials consisting of a single substance and having electroluminescent characteristics .
Having overcome the technical prejudices, the present invention leads to the ability to produce large quantities of accurately formed electroluminescent devices at very low cost. Such an ability can potentially drastically change the whole area of display technology. It would now be possible to produce low cost, disposable, flat TV and computer screens as well as extending the possible areas of application of electroluminescent displays to such areas as packaging, moving picture instruction labels, business cards, magazine covers, identity cards, menus, anticounterfeiting devices, etc.

Claims

Claims
1. A method of producing an electroluminescent device which comprises the steps of:
-applying a first conductive electrode to a substrate;
- using a standard printing process to apply a Light Emitting Polymer on top of though not necessarily adjacent to said first electrode;
- applying a second conductive electrode on top of though not necessarily adjacent to said Light Emitting Polymer;
whereby an accurately-placed layer of Light Emitting Polymer of controllable thickness is formed using a method which is as fast and cost-effective as desired.
2. A method of producing an electroluminescent device according to claim 1 wherein said process is selected from the group consisting of letter-press printing and screen-printing and doctor blade coating and ink-jet printing .
3. A method of producing an electroluminescent device according to claim 1 wherein said process is selected from the group consisting of roller printing and reverse-roller printing and offset lithographic printing and flexographic printing and web printing.
4.- A method of producing an electroluminescent device according to any of the preceding claims wherein said Light Emitting Polymer is mixed with a polar solvent.
A method of producing an electroluminescent device according to claim 4 wherein said polar solvent is an aqueous solution.
6. A method of producing an electroluminescent device according to any of the preceding claims wherein said standard printing process is carried out in a controlled atmosphere.
7. A method of producing an electroluminescent device according to any of the preceding claims wherein the viscosity and evaporation of the Light Emitting Polymer solution is controlled by controlling the temperature of a stage of the standard printing process .
8. A method of producing an electroluminescent device according to any of claims 3 to 7 wherein the temperature is controlled by controlling the temperature of the printing rollers .
9. A method of producing an electroluminescent device according to any of the preceding claims which comprises the extra step of applying barrier layers to any of the applied layers .
10. A method of producing an electroluminescent device according to any of the preceding claims which comprises the extra step(s) of applying addtional charge trapping or charge diffusion layers between any of said first conductive electrode, layer of Light Emitting Polymer and second conductive electrode.
PCT/GB1998/002211 1997-07-29 1998-07-24 Electroluminescent device production process WO1999007189A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98935209A EP0931435A1 (en) 1997-07-29 1998-07-24 Electroluminescent device production process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9715907.3A GB9715907D0 (en) 1997-07-29 1997-07-29 Electroluminescent device production process
GB9715907.3 1997-07-29

Publications (2)

Publication Number Publication Date
WO1999007189A1 true WO1999007189A1 (en) 1999-02-11
WO1999007189A9 WO1999007189A9 (en) 1999-06-17

Family

ID=10816589

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/002211 WO1999007189A1 (en) 1997-07-29 1998-07-24 Electroluminescent device production process

Country Status (3)

Country Link
EP (1) EP0931435A1 (en)
GB (1) GB9715907D0 (en)
WO (1) WO1999007189A1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073859A1 (en) * 1999-06-01 2000-12-07 Eidelson Arthur F Programmable electronic label
US6518601B2 (en) 2000-11-14 2003-02-11 Osram Opto Semiconductors Gmbh & Co. Ohg Light-emitting diode
US6569706B2 (en) * 2001-09-19 2003-05-27 Osram Opto Semiconductors Gmbh Fabrication of organic light emitting diode using selective printing of conducting polymer layers
DE10157945A1 (en) * 2001-11-27 2003-06-12 Osram Opto Semiconductors Gmbh Process for producing an organic, electroluminescent display and an organic, electroluminescent display
US6833283B2 (en) 2001-07-27 2004-12-21 The Ohio State University Methods for fabricating polymer light emitting devices by lamination
US6903958B2 (en) 2000-09-13 2005-06-07 Siemens Aktiengesellschaft Method of writing to an organic memory
US6962757B2 (en) 1996-08-02 2005-11-08 The Ohio State Universtiy Research Foundation Electroluminescence in light emitting polymers featuring deaggregated polymers
US7238961B2 (en) 2001-02-09 2007-07-03 Polyic Gmbh & Co. Kg Organic field effect transistor with a photostructured gate dielectric, method for the production and use thereof in organic electronics
US7287469B2 (en) 2001-07-13 2007-10-30 Osram Opto Semiconductors Gmbh Device and method for continuous screen printing of organic light emitting diodes
US7298023B2 (en) 2001-10-16 2007-11-20 Polyic Gmbh & Co. Kg Electronic device with organic insulator
EP1863093A2 (en) 2006-05-30 2007-12-05 Osram Opto Semiconductors GmbH Organic light-emitting component, device with an organic light-emitting component and illumination device and method for manufacturing an organic light-emitting component
US7544383B2 (en) 2001-10-26 2009-06-09 Osram Opto Semiconductor Gmbh Method for applying mechanically sensitive layers to a substrate over a large area
EP2262031A3 (en) * 1999-06-28 2012-04-11 Semiconductor Energy Laboratory Co., Ltd. Light emitting display device

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10043204A1 (en) 2000-09-01 2002-04-04 Siemens Ag Organic field-effect transistor, method for structuring an OFET and integrated circuit
DE10061299A1 (en) 2000-12-08 2002-06-27 Siemens Ag Device for determining and / or forwarding at least one environmental influence, production method and use thereof
DE10061297C2 (en) 2000-12-08 2003-05-28 Siemens Ag Procedure for structuring an OFET
DE10151440C1 (en) 2001-10-18 2003-02-06 Siemens Ag Organic electronic component for implementing an encapsulated partially organic electronic component has components like a flexible foil as an antenna, a diode or capacitor and an organic transistor.
DE10160732A1 (en) 2001-12-11 2003-06-26 Siemens Ag OFET used e.g. in RFID tag, comprises an intermediate layer on an active semiconductor layer
DE10212640B4 (en) 2002-03-21 2004-02-05 Siemens Ag Logical components made of organic field effect transistors
DE50306683D1 (en) 2002-08-23 2007-04-12 Polyic Gmbh & Co Kg ORGANIC COMPONENT FOR OVERVOLTAGE PROTECTION AND ASSOCIATED CIRCUIT
DE10253154A1 (en) 2002-11-14 2004-05-27 Siemens Ag Biosensor, used to identify analyte in liquid sample, has test field with detector, where detector registers field changes as electrical signals for evaluation
WO2004047144A2 (en) 2002-11-19 2004-06-03 Polyic Gmbh & Co.Kg Organic electronic component comprising a structured, semi-conductive functional layer and a method for producing said component
DE10302149A1 (en) 2003-01-21 2005-08-25 Siemens Ag Use of conductive carbon black / graphite blends for the production of low-cost electronics
DE10339036A1 (en) 2003-08-25 2005-03-31 Siemens Ag Organic electronic component with high-resolution structuring and manufacturing method
DE10340644B4 (en) 2003-09-03 2010-10-07 Polyic Gmbh & Co. Kg Mechanical controls for organic polymer electronics
DE102005009820A1 (en) 2005-03-01 2006-09-07 Polyic Gmbh & Co. Kg Electronic assembly with organic logic switching elements

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003596A1 (en) * 1984-02-06 1985-08-15 Rogers Corporation Electrical circuits and components
JPH03269995A (en) * 1990-03-16 1991-12-02 Ricoh Co Ltd Manufacture of electric field luminescence element
WO1998030069A1 (en) * 1996-12-30 1998-07-09 E.L. Specialists, Inc. Elastomeric electroluminescent lamp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3463362B2 (en) 1993-12-28 2003-11-05 カシオ計算機株式会社 Method of manufacturing electroluminescent device and electroluminescent device
US5682043A (en) 1994-06-28 1997-10-28 Uniax Corporation Electrochemical light-emitting devices
JP3899566B2 (en) 1996-11-25 2007-03-28 セイコーエプソン株式会社 Manufacturing method of organic EL display device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003596A1 (en) * 1984-02-06 1985-08-15 Rogers Corporation Electrical circuits and components
JPH03269995A (en) * 1990-03-16 1991-12-02 Ricoh Co Ltd Manufacture of electric field luminescence element
WO1998030069A1 (en) * 1996-12-30 1998-07-09 E.L. Specialists, Inc. Elastomeric electroluminescent lamp

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 9203, Derwent World Patents Index; Class L03, AN 92-020645, XP002080741 *
See also references of EP0931435A1 *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6962757B2 (en) 1996-08-02 2005-11-08 The Ohio State Universtiy Research Foundation Electroluminescence in light emitting polymers featuring deaggregated polymers
US6337836B1 (en) 1999-06-01 2002-01-08 Arthur F. Eidelson Programmable electronic label
WO2000073859A1 (en) * 1999-06-01 2000-12-07 Eidelson Arthur F Programmable electronic label
EP2262031A3 (en) * 1999-06-28 2012-04-11 Semiconductor Energy Laboratory Co., Ltd. Light emitting display device
US6903958B2 (en) 2000-09-13 2005-06-07 Siemens Aktiengesellschaft Method of writing to an organic memory
US6518601B2 (en) 2000-11-14 2003-02-11 Osram Opto Semiconductors Gmbh & Co. Ohg Light-emitting diode
US7238961B2 (en) 2001-02-09 2007-07-03 Polyic Gmbh & Co. Kg Organic field effect transistor with a photostructured gate dielectric, method for the production and use thereof in organic electronics
US7287469B2 (en) 2001-07-13 2007-10-30 Osram Opto Semiconductors Gmbh Device and method for continuous screen printing of organic light emitting diodes
US6833283B2 (en) 2001-07-27 2004-12-21 The Ohio State University Methods for fabricating polymer light emitting devices by lamination
US6569706B2 (en) * 2001-09-19 2003-05-27 Osram Opto Semiconductors Gmbh Fabrication of organic light emitting diode using selective printing of conducting polymer layers
US6794676B2 (en) * 2001-09-19 2004-09-21 Osram Opto Semiconductors Gmbh Fabrication of organic light emitting diode using selective printing of conducting polymer layers
US7298023B2 (en) 2001-10-16 2007-11-20 Polyic Gmbh & Co. Kg Electronic device with organic insulator
US7544383B2 (en) 2001-10-26 2009-06-09 Osram Opto Semiconductor Gmbh Method for applying mechanically sensitive layers to a substrate over a large area
DE10157945A1 (en) * 2001-11-27 2003-06-12 Osram Opto Semiconductors Gmbh Process for producing an organic, electroluminescent display and an organic, electroluminescent display
US6851996B2 (en) 2001-11-27 2005-02-08 Osram Gmbh Method for producing an organic electroluminescent display, and an organic electroluminescent display
DE10157945C2 (en) * 2001-11-27 2003-09-18 Osram Opto Semiconductors Gmbh Process for producing an organic, electroluminescent display and an organic, electroluminescent display
EP1863093A2 (en) 2006-05-30 2007-12-05 Osram Opto Semiconductors GmbH Organic light-emitting component, device with an organic light-emitting component and illumination device and method for manufacturing an organic light-emitting component
US7994715B2 (en) 2006-05-30 2011-08-09 Osram Opto Semiconductors Gmbh Organic light-emitting component with an antenna coil
US8317561B2 (en) 2006-05-30 2012-11-27 Osram Opto Semiconductors Gmbh Method for producing an organic light-emitting component with an antenna coil

Also Published As

Publication number Publication date
EP0931435A1 (en) 1999-07-28
WO1999007189A9 (en) 1999-06-17
GB9715907D0 (en) 1997-10-01

Similar Documents

Publication Publication Date Title
EP0931435A1 (en) Electroluminescent device production process
RU2346359C2 (en) Film manufacturing method
DE60035078T2 (en) Manufacturing method of a heat transfer donor element
CN101796561B (en) The manufacture method of display element, the manufacturing installation of display element and display device
JP4994727B2 (en) Organic transistor active substrate, manufacturing method thereof, and electrophoretic display using the organic transistor active substrate
JP3947226B2 (en) EL panel with roll coating
US20030175427A1 (en) Forming nanoscale patterned thin film metal layers
JPH0696640A (en) Electronic key or electronic keyboard and manufacturing method thereof
US20070068404A1 (en) Systems and methods for additive deposition of materials onto a substrate
DE10308515A1 (en) Method of manufacturing organic light emitting diodes and organic light emitting diode
EP1214868B1 (en) Organic electroluminescent device and production method thereof
DE10318187A1 (en) Encapsulation for organic light emitting diode components
JP2007015235A (en) Image forming method and image forming apparatus using the same
JP4197447B2 (en) Method for manufacturing organic electroluminescent device and organic electroluminescent device
WO2012043151A1 (en) Relief printing plate for printing and method for manufacturing organic el element using same
JP4682691B2 (en) Method for manufacturing organic electroluminescence device
JPH03280416A (en) Resist pattern forming method
JP2011115973A (en) Letterpress for printing, method for manufacturing organic electroluminescent element using the same, and organic electroluminescent element
JP4675060B2 (en) Electrophoretic display medium
KR20030057065A (en) A method of forming metal pattern
JP4792942B2 (en) Printing method and printing apparatus on flexible substrate
JP2004303654A (en) Organic electroluminescent element and its manufacturing method
JP2012002934A (en) Method for manufacturing electrophoretic display device
JP2012060057A (en) Method of manufacturing organic thin film transistor
JPH09211455A (en) Manufacturing method of liquid crystal display element

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

WWE Wipo information: entry into national phase

Ref document number: 1998935209

Country of ref document: EP

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 09269294

Country of ref document: US

AK Designated states

Kind code of ref document: C2

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: C2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

COP Corrected version of pamphlet

Free format text: PAGES 1/3-3/3, DRAWINGS, ADDED

WWP Wipo information: published in national office

Ref document number: 1998935209

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 1999510643

Format of ref document f/p: F

WWW Wipo information: withdrawn in national office

Ref document number: 1998935209

Country of ref document: EP