DE19802269A1 - Electroluminescent element and method for its production - Google Patents

Abstract

The invention relates to the manufacture of electroluminescent elements on the basis of a so-called planar electrode arrangement (8a, 8b), whereby the modifications in accordance with the invention enable a substantial increase of the luminous power to be attained. To strengthen the electric field and hence increase the brightness, a special multilayer technology is employed. The electric field may be further strengthened by a film having a high dielectric constant. Preferably, a customary printed circuit board is used as the supporting board, so that the process in which the electroluminescent element is manufactured can be directly integrated in the printed- circuit-board manufacturing process. A further advantage of the invention is that the printed circuit boards provided with the optical components in accordance with the invention can be soldered by means of customary solder processes.

Description

The invention relates to an electroluminescent element layered and / or planar electrode arrangement, which when applying a corresponding supply voltage to Lights can be brought, as well as its manufacturing process and its application.

The production of electroluminescent elements with a so-called planar electrode arrangement is already out DE 19 34 946, DE 38 02 318 and 38 02 317 are known. That kind of Manufacturing, however, has some serious disadvantages compared to the layer structure (known from DE 40 23 693 or DE 20 12 803), so that currently no such planar There are elements on the market.

For example, the developing electrical field depends on thus the achievable brightness of the lighting element by the luminosity of the luminous pigments in one Electroluminescent layer, strongly from the distance between the Electrodes. Technically and, above all, economically Production of a large number of parallel conductor tracks with short distance but set limits. The distance of the Electrodes to each other are typically around in the layer structure more than half less than in planar technology. Around one has to compensate for this disadvantage of the planar structure increase the electric field, which is an additional expense in the Isolation means.

The present invention is based on the object Structure of electroluminescent elements in different Describe embodiments and methods for their Manufacture to specify the spacing of the electrodes compared to the previously known prior art are reduced, causing the electroluminescent element inexpensive, with a long service life, high luminosity and  Functionality with the respectively available Energy supply should be producible.

Your task is solved by an optionally combined arrangement of the electrodes, and the insulating and Electroluminescent layers, according to the characteristics of the Claim 1, and the method for producing this Arrangements according to the features of claims 19 and the following.

An essential feature of the present invention is that an electrode arrangement for luminescent elements in Multi-layer construction, partly in combination with additional ones planar electrodes is proposed, which a have increased luminance.

The different arrangements of each executive and non-conductive layers are made by pressing on one plastic-coated copper foil and / or by application individual conductive or non-conductive layers by means of Screen printing process, on a acting as a carrier material copper-clad circuit board.

Depending on the application, one or more, below conductive or non-conductive layers described in more detail applied to the base body.

In the case of multi-layer construction, the base or carrier material for the electroluminescent element is preferably a conventional one Printed circuit board used. There will be a corresponding structure The base copper of the circuit board is made from both parallel traces as well as from a any conductor structure can exist.

Based on this structure, a special one is based on it Method pressed a plastic-coated copper foil. Are the parallel electrodes of a pole on the Base circuit board and become the electrodes of the second pole  formed from the copper foil, this has the great advantage that the electrodes of the two poles through the Plastic coating of the copper foil (for example 30 µm thick) are electrically separated from each other.

The comb-like structure of the electrodes can be retained be, with the difference that the electrodes of the two poles in this version on two different Levels.

By dividing the two electrode shapes two isolated levels, the distance between the electrodes can be varied or reduced as required after like the conductor tracks on the pressed copper foil to the conductor tracks on the base material.

Since the electrodes of the respective pole are on different Layers are arranged, the required Conductor spacing per layer increased accordingly. The means that the comb-like electrodes are process-related are much easier and more economical to manufacture. In addition, the plastic coating of the copper foil has a high uniformity, and thus guarantees a constant Distance between the two electrode layers.

A second embodiment builds on the first. Here however, the copper layer of the board forms one Additional electrode to strengthen the electric field, what an additional excitation of the luminous pigments in the Electroluminescent layer, and thus a larger one Luminous efficacy causes. It is electrically conductive with the connected layer above. The electrode for the second pole is over the insulating layer of the copper foil upset. This creates when creating an electrical Voltage at the poles two electrical fields. The first field corresponds in its mode of operation to that in the aforementioned Execution, the second field now forms over the first field  away between the cover electrode and the additional electrode, formed from the copper cladding of the board, and reinforces the first field. The embodiment of the electrodes can be chosen arbitrarily.

In another embodiment, in addition to plastic-coated copper foil using screen printing a Insulation layer are applied, on which the Conductor tracks using various conductive pastes based on copper, Silver or carbon can be applied, so that a total of three conductive layers are superimposed.

The electroluminescent layer is then printed on. A dielectric, which is preferably designed to be reflective, can be printed under this electroluminescent layer 6 . However, the dielectric can also be formed by the carrier resin of the electroluminescent color layer. Separate dielectric and / or insulation layers can thus be omitted.

Since only in the areas between the two electrode formations does the electric field strength reach that required for the electroluminescence excitation of a few 10 ⁶ volts per cm, phosphor paste is excited to light up only in these areas. Thus, with an appropriately fine electrode arrangement, both an almost flat illuminated field design and a very specially designed illuminated field structure can be achieved.

Then a transparent decorative or top layer can be used optical design can be applied.

In a further embodiment, the carrier resin Luminous pigments or the transparent top coat additives be admixed, the dielectric constant of this Increase layers (typically 3-5 at 1000 Hz), or one separate layer applied to the luminescent pigment layer become the very same property of a high  Has dielectric constant. The attainable with it The strengthening of the electric field causes an additional one Excitation of the luminescent pigments.

In the following the invention is illustrated by a few Embodiments shown in more detail and it should features essential to the invention are emphasized.

Show it:

Fig. 1 is a plan view of an electroluminescent panel having a planar bipolar electrode assembly;

FIG. 2 shows a plan view of a section of the planar bipolar electrode arrangement according to FIG. 1;

3 shows a section AA through the planar bipolar electrode assembly of Figure 2..;

Fig. 4 shows a section through an electroluminescent panel, wherein the electrodes 2 a of the one pole A through the copper layer of the circuit board and the electrodes are formed or 8 b 2 b of the second pole b by a pressed-on copper foil.

Figure 5 is a section through an electroluminescent panel having a planar electrode arrangement 8 a, 8 b and an additional underlying electrode 2a formed from the conductor layer of the PCB, to strengthen the electric field.

FIG . 5 a shows the field structure in the arrangement according to FIG. 5.

Fig. 6 shows a section through an electroluminescent field with layer-by-layer electrode arrangement 8 a and 9 b and an additional electrode 2 a for strengthening the electrical field, the planar adjacent electrodes of a pole 8 a or b being applied by copper foil and / or by screen printing from conductive pastes ;

Fig. 7 is a section through an electroluminescent panel having a planar electrode assembly 2 a, 2 b, where an additional layer 15 is applied with a high relative dielectric constant of the electroluminescent layer.

In Fig. 1, the patterned copper conductor tracks 2 are on a printed circuit board substrate 1 a shown b 2, wherein the conductor 2a, the one electrode (Pol a power supply) and interconnect 2 b and the other electrode (terminal b of the power supply) of the electroluminescent element is formed. An insulation or dielectric layer with a good retroreflective effect can first be applied to the base electrodes 2 a, 2 b. In this example, however, a layer of electroluminescent paint 6 is applied directly to the electrode arrangement. The electroluminescent paint 6 is mixed with a suitable, electrically well-insulating carrier substance so that a separate insulation layer is not necessary. Usually there is then a protective layer covering the entire surface of the copper connection surfaces, in which case a transparent solder resist is preferably used, since this also ensures resistance to the solder bath and an additional barrier against water vapor. Depending on the embodiment, various insulation or dielectric layers can be added or omitted in a sensible order.

FIG. 2 shows an enlarged section of the planar electrode arrangement shown in FIG. 1. It can be seen that the electrodes 2 a, 2 b are arranged over the entire light area 10 provided and intermesh like a comb, so that a meandering space 7 is formed between the electrodes. The width of the electrodes is preferably 50 μm to 500 μm. The electrodes 2 a, 2 b are arranged alternately with a small mutual spacing between the spaces 7 of preferably 50 μm to 500 μm on the substrate.

This electrode arrangement will now be one or two electrically insulating dielectric layers 4, 5 printed, said layers 4, 5 with an appropriate choice of the luminescent color can also be omitted.

The electroluminescent layer 6 is then printed on the dielectric layer 4 , 5 , preferably in the region of the spaces 7 between the electrodes 2 a, 2 b. If a voltage is now applied to the electrodes 2 a, 2 b, an electrical field is formed in the spaces 7 , between the electrodes 2 a and 2 b, which excites the luminescent layer 6 to light up over this area.

FIG. 3 shows a section along the line AA through the arrangement according to FIG. 2. The electrodes alternately arranged on the substrate 1 and the insulation and luminescence layers 4-6 printed in layers on the electrode arrangement can be seen. The main beam direction of the luminescent element is indicated by the arrows 11 .

In this illustration, the planar electrode arrangement, consisting of the electrodes 2 a, 2 b, is covered by a first insulation layer 4 . This insulation layer 4 should have good insulation properties and a low dielectric constant.

The second insulation layer 5 lying above should have good reflection properties. This is e.g. B. achieved by adding white pigments. The insulation layer 4 therefore primarily has an insulation task, while the insulation layer 5 primarily has the task of representing a good reflector.

Fig. 4 shows the execution of a layer-built electroluminescent element. The electrodes 2 a for the pole (a) of the voltage supply are formed from the copper cladding of the circuit board base material. The electrodes 2 b for the second pole (b) of the voltage supply are formed from a pressed-on, plastic-coated copper foil 8 .

An insulation or dielectric layer 4 with a good retroreflective effect can be applied to this electrode arrangement. The electroluminescent layer 6 and cover layer 14 are then printed on. The electrodes 2 a are each electrically connected to one another, and the electrodes 8 b are likewise electrically connected to one another, and thus each form a pole (a or b) of the luminescent element.

It is characteristic of this embodiment that copper lamination is initially present on the substrate 1 , the conductor tracks of the poles 2 a, which are defined later, being printed with an etch-resistant lacquer using the screen printing method. The excess copper is then etched away, so that the poles 2 a remain.

If one would now print the poles 8 b in the same plane as the poles 2 a, this is associated with the disadvantage that the two poles, due to the screen printing technique, can only have a certain minimum distance which must not be less than a certain dimension. Otherwise there would be electrical short circuits between the (relatively small distances), which prevents the functionality of the electroluminescent element.

This is where the invention comes in, which provides that the poles 8 b are formed by a pressed-on copper foil, on the underside of which a coating consists of a plastic. The coating 8 c is pressed onto the previously etched poles 2 a and acts as insulation between these poles 2 a and, of course, also as insulation to the poles 8 b lying above it on another polarity.

This thus penetrates this plastic coating 8 c into the space between the poles 2 a and isolates them from one another.

The poles 8 b are etched out in the same way from a plastic-coated copper foil, so that there is a dividing line 16 on which the poles 8 b lie. By layering the two poles 2 a, 8 b one above the other, it is now possible for the first time to minimize the distance 17 between these two poles in a decisive manner, without the risk that there will be conclusions or flashovers between these two electrodes.

As a result, the luminance of the luminescent element can be improved to a substantial extent because the distance 17 can be kept very small.

The distance 17 is limited by the thickness of the plastic coating 8 c from the top of one electrode 2 a towards the bottom of the other electrode 8 b.

An insulation layer 4 can also be applied, which can also be colored white, for example, in order to form an additional reflection layer for the luminescent element. But it can also be omitted.

If this insulation layer 4 is present , it can be made of such a plastic material with admixtures of substances, if necessary, so that a high dielectric constant results, which significantly improves the luminance of the luminescent element thus obtained.

This insulation layer 4 is applied by screen printing. The electroluminescent layer 6 carrying the phosphor pigments is now arranged above this layer and is likewise applied using the screen printing method.

It is important in this embodiment that the electrodes 2 a, 8 b are now not arranged next to one another in a planar manner but rather in layers one above the other, which means that the distances 17 between the electrodes can be significantly minimized and as a result significantly higher field strengths can be generated in this field gap .

The distance 17 can even go to zero or even be negative, in which case the electrodes 2 a, 8 b even overlap. This overlapping situation is also sufficient to enforce the electroluminescent layer 6 with sufficient field line, because even with overlap there is a stray field between the two overlapping and one above the other electrodes 2 a, 8 b, which at least partially passes through the electroluminescent layer 6 and this for Lights up.

In particular, due to the fact that the insulation layer 8 c is a very good insulator, the field lines are not caused to align directly between the electrodes 2 a, 8 b lying one above the other, but rather a considerable stray field is created, which is suitable to bring the electroluminescent layer 6 to light up.

However, it is preferred if the distance 17 has positive values, ie if there is no direct vertical overlap of the two electrodes 2 a, 8 b.

A spacing of 150 micrometers was chosen for electrodes lying side by side, which is very difficult to master in terms of production technology. If the electrodes 8 b are now placed in a position above them, there is a distance between electrodes 2 a of the same polarity of 500 micrometers and this distance is much easier to master in terms of production technology than the previously mentioned, smaller dimension.

Due to the pressing process, with which the plastic-coated copper foil 8 , which carries the electrodes 8 b, is pressed onto the still exposed electrodes 2 a, there is also the formation of a vertical distance 18 , which in the figure of FIG. 4 is the lower edge of the upper Pole 8 b is defined in the direction of the upper edge of the lower poles 2 a.

With this pressing process it is possible that the electrodes also overlap one another, ie the distance 18 can go to zero or also assume negative values.

It is therefore preferred if the distance 18 assumes negative values, ie if the electrodes 2 a, 8 b overlap one another in the vertical direction and, apart from minor differences, essentially again form a flat plane. It is important here that the electrodes 2 a, 8 b were produced with separate manufacturing processes, so that with the technical teaching according to the invention of the layered construction of this element, significantly smaller distances between the electrodes can be achieved without difficulties in production.

Fig. 5 shows a planar electrode arrangement 8 a and 9 a, and 8 b and 9 b in a sectional view. In addition to the planar electrode arrangement 8 a or 9 a, and 8 b or 9 b, an additional electrode 2 a of any structure is formed here, formed from the copper cladding of the printed circuit board base material. This additional electrode 2 a is electrically conductively connected to a pole of the planar electrode arrangement here 8 a or 9 a.

At least one insulation or dielectric layer 4 , 5 with a good retroreflective effect is applied between the planar electrode arrangement and the additional electrode.

The planar electrode arrangement is produced either by a pressed-on plastic-coated copper foil 8 a, 8 b or by screen printing of conductive pastes 9 a, 9 b. In the case of the plastic film, the insulation or. Dielectric layer (s) 4 , 5 are dispensed with, since the coating of the copper foil already has these electrical properties.

The effect of the additional electrode 2 a is that the resulting field is amplified and distorted in the area of the planar electrode arrangement 8 a, 8 b or the conductive paste electrode arrangement 9 a, 9 b produced by screen printing. There is thus (by adding the additional electrode) an enlargement of the stray field, which is formed anyway between the finger-shaped electrodes 8 a, 8 b and 9 a, 9 b, because there is a displacement effect.

These effects are shown in more detail in FIG. 5a. It is shown here that the additional electrode is designed as a copper foil 2 a, which is electrically conductive, is connected to the upper conductor track 8 a, which together form a pole of the potential. The poles of the conductor track 8 b form the second pole of the potential.

The solid lines 19 depict the field lines 19 which would result if the additional electrode 2 a were not present.

If the additional electrodes are added with a simultaneous conductive connection to the conductor tracks 8 a, the field of the field line 19 is widened in accordance with the broken line. First, field lines 20 result between the electrodes 8 b and 2 a lying on different polarity, as shown in FIG. 5 a.

It is important, however, that due to the additional field lines 20, the field lines 19 are displaced upward and form further field lines 21 , which now penetrate into the luminescent layer above (not shown in the drawing) in a particularly favorable manner and increasingly illuminate them. In this way, the luminance of the luminescent layer is significantly improved.

It is important in the embodiment according to FIG. 5 that, of course, the electrodes 8 a and 8 b can not only lie planarly next to one another, but that they are also partially offset from one another in vertical superimposed positions according to the previously described embodiment of FIG. 4.

The attachment of an additional electrode 2 a is thus claimed to be essential to the invention both in planar electrodes according to the exemplary embodiment according to FIG. 5 and also in the case of electrodes arranged offset with respect to one another in accordance with the exemplary embodiment according to FIG. 4.

Fig. 6 shows a section through an electroluminescent element in an embodiment with three insulated, superimposed, conductive layers 2 a, 8 a, 9 b. The bottom conductor layer 2 a comes from the circuit board, the middle conductor layer 8 a comes from the plastic-coated copper foil, and the third conductor layer 9 b is produced by means of screen printing processes from various conductive pastes based on copper, silver carbon or other conductive materials. There are insulation layers 4 , 5 between the electrode arrangements.

The Fig. 6 therefore shows the aforementioned combination of the embodiment of Fig. 4 and Fig. 5, because, 9 b disposed partially overlapped in different layers to each other in Fig. 6 corresponding to the Fig. 4, the electrode 8 a. Here, the upper electrodes 9 b are applied as conductive pastes to the insulation layer 4 by screen printing.

FIG. 7 shows a structure according to FIG. 3. An additional transparent layer 15 with a high dielectric constant reinforces the stray electrical field between the electrodes 2 a and 2 b, which results in a greater luminous efficiency.

While in FIG. 3 the luminescent layer 6 is applied to two different insulation layers 4 , 5 , in FIG. 7 the luminescent layer 6 is applied directly to the lowest insulation layer.

The electroluminescent layer 6 and a cover layer 14 are applied to the planar electrode arrangement. Optionally, an additional transparent layer 15 with a high relative dielectric constant according to FIG. 7 can be applied over the electroluminescent layer.

Reference list

1

Substrate (printed circuit board)

2nd

Copper foil (lamination of the circuit board)

2nd

a copper foil (lamination of the printed circuit board) (shaped as electrode pole a)

2nd

b copper foil (lamination of the printed circuit board) (shaped as electrode pole b)

4th

Insulation layer

1

5

Insulation layer

2nd

6

Electroluminescent layer

7

Clearance between the electrode formations

8th

Plastic-coated copper foil (layers: plastic coating, copper)

8th

a conductor track of the copper foil pole a

8th

b conductor track of the copper foil pole b

8th

c Coating the copper foil

9

a conductive paste pole a

9

b conductive paste pole b

10th

Luminous area

11

Beam direction

14

(Decorative) top layer

15

transparent layer with high relative dielectric constant

16

parting line

17th

Distance (horizontal)

18th

Distance (vertical)

19th

Field lines

20th

Field lines

21

Field lines

Claims (29)

1. electroluminescent element with an electrode arrangement applied to a base material and at least one electroluminescent layer applied in the region of this electrode arrangement, the electrodes being arranged on the base material and being separated from one another by an intermediate space and the electroluminescent layer being provided at least in the region of the intermediate space, characterized in that Amplification of the electric field and thus the brightness of an electroluminescent element, a reduction in the electrode spacing takes place in that the electrodes ( 2 a, 2 b; 9 a, 9 b) of the same polarity are arranged vertically one above the other and at least partially offset from one another, ( Fig. 4). 2. Electroluminescent element with an electrode arrangement applied to a base material and at least one electroluminescent layer applied in the region of this electrode arrangement, the electrodes being arranged on the base material and separated from one another by an intermediate space and the electroluminescent layer being provided at least in the region of the intermediate space, characterized in that at The presence of planar electrodes, at least one further electrode ( 2 a) is arranged below the electrodes ( 8 a, 8 b) lying next to one another in planar fashion ( FIG. 5), which is conductively connected to a pole of the planar electrodes ( 8 a, 8 b) , ( Fig. 5a). 3. Electroluminescent element according to claim 1 or 2, characterized in that the base material ( 1 ) is a conventional circuit board, and the electrodes ( 2 a, 2 b) are formed by the electrically conductive layer of the circuit board. 4. Electroluminescent element according to one of claims 1 to 3, characterized in that the electrodes ( 2 a, 2 b) are integrated directly into a circuit board layout or a circuit board wiring. 5. Electroluminescent element according to one of claims 1 to 4, characterized in that the electric field is strengthened by an additional transparent (translucent) layer ( 15 ) which is arranged above the layer ( 6 ) carrying the luminous pigments. 6. Electroluminescent element according to one of claims 1 to 5, characterized in that the entire illuminated field ( 10 ) by a transparent decorative / cover layer ( 14 ) or a so-called solder mask and thus protected against environmental influences and can be soldered with conventional soldering methods. 7. Electroluminescent element according to one of claims 1 to 6, characterized in that the base material ( 1 ) is a flexurally flexible or flexible printed circuit board and thereby spatial structures are formed and connection elements are angled, which are conductive with a pole of the planar electrodes ( 8 a, 8 b) is connected ( Fig. 5a). 8. Electroluminescent element according to one of claims 1 to 7, characterized in that for the purpose of graphic design, translucent and / or opaque color layers ( 14 ) are printed on the luminous field ( 10 ). 9. Electroluminescent element according to one of claims 1 to 8, characterized in that the light field ( 10 ) is designed in the form of a separate layer structure in a further layer above the existing conductor tracks ( 2 ) of the circuit board ( 1 ). 10. Electroluminescent element according to one of claims 1 to 9, characterized in that the electroluminescent colors or the transparent one above Protective layer mixed with fluorescent colors or luminescent powder are excited by the electroluminescent radiation and light emission in the visible range, especially with clearly recognizable colors, i.e. narrow-band spectra, produce. 11. Electroluminescent element according to one of claims 1 to 10, characterized in that in the infrared range radiating electroluminescent colors are used. 12. Electroluminescent element according to one of claims 1 to 11, characterized in that the planar electrodes lying side by side ( 2 a, 2 b; 8 a, 8 b; 9 a, 9 b) made of plastic-coated copper foil and / or different conductive pastes based on copper , Silver, or carbon. 13. Electroluminescent element according to one of claims 1 to 14, characterized in that the relative dielectric constant of the carrier resin of the luminous pigment layer ( Fig. 7) is increased by the addition of substances. 14. Electroluminescent element according to one of claims 1 to 13, characterized in that the carrier plastic mass of Electroluminescent paint at the same time the insulation system forms. 15. Electroluminescent element according to one of claims 1 to 14, characterized in that the light field additively over a existing PCB layout (copper tracks) is applied. 16. Electroluminescent element according to one of claims 1 to 15, characterized in that the electrical Power supply of the electroluminescent element directly through usual mains voltage of typically 110 volts / 60 Hz or 230 volts / 50 Hz up to high voltages of 1200 volts / 10 kHz can be done. 17. Electroluminescent element according to one of claims 1 to 16, characterized in that to generate a flashing Signal effect the electrical energy supply additionally is executed pulsating. 18. Electroluminescent element according to one of claims 1 to 17, characterized in that the electrical Energy supply according to the ambient brightness and / or the ambient noise and / or corresponding to one Motion detector, etc. is controlled. 19. A process for producing an electroluminescent element characterized by the following process steps:

• 1. applying an etch resistant pattern on a laminated with an electrically conductive layer substrate (1) to mask during the etching process and the preparation of the electrodes of the one pole (2 a) and the electrode terminals by this etching process,
• 2. Pressing on a plastic-coated copper foil ( 8 ), applying an etch-resistant structure for masking during the etching process, producing the electrodes of the other pole ( 2 b) and the electrode connections, by an etching process, or by screen printing various conductive pastes based on copper, silver or carbon,
• 3. applying an insulation layer ( 4 ) by at least one screen printing process with the aid of correspondingly highly insulating screen printing inks,
• 4. applying an electroluminescent layer ( 6 ) by means of screen printing,
• 5. Applying a translucent, solder-resistant cover layer ( 14 ), ( Fig. 4).

20. A process for producing an electroluminescent element characterized by the following process steps:

• 1. applying an etch-resistant structure to a substrate ( 1 ) laminated with an electrically conductive layer for masking during the etching process and producing the additional electrode (s) ( 2 a) which amplifies the electric field by means of an etching process,
• 2. applying at least one insulation layer ( 4 , 5 ) by at least one screen printing process with the aid of correspondingly highly insulating screen printing inks, in the manufacture of the planar electrode arrangement ( 8 a, 7 b; 9 a, 9 b) using the screen printing process,
• 3. Application of the planar electrode arrangement ( 8 a, 7 b; 9 a, 9 b) either by pressing on a plastic-coated copper foil and subsequent etching process, or by screen printing various conductive pastes based on copper, silver or carbon ( 9 a, 9 b),
• 4. Application of an electroluminescent layer ( 6 ) by means of screen printing.
• 5. Applying a translucent, solder-resistant cover layer ( 14 ), ( Fig. 5).

21. A method for producing an electroluminescent element according to one of claims 19 or 20, characterized in that the electrodes ( 9 a, 9 b) which are planar next to one another are executed by screen printing different conductive pastes based on copper, silver or carbon and that the insulation layer ( 4 ) to be applied between the electrodes ( 8 a) made of copper foil and the electrodes ( 9 b) made of conductive paste by at least one screen printing process with the aid of correspondingly highly insulating screen printing inks or by the carrier resin of the phosphor paste, and that thereafter a translucent , solder-resistant cover layer ( 14 ) is applied ( Fig. 6). 22. A method for producing an electroluminescent element according to claim 19 or 20, characterized by the following method steps:

• 1. Production of the electrodes ( 2 a, 2 b) lying planar next to one another by applying an etch-resistant structure to a base material laminated with an electrically conductive layer for masking during the etching process and production of the electrodes ( 2 a, 2 b) lying next to one another by an etching process,
• 2. Application of an electroluminescent layer ( 6 ) by means of screen printing, it being possible for the carrier resin of the electroluminescent pigments to have a high relative dielectric constant, in particular by adding additives,
• 3. Application of a transparent or translucent layer ( 15 ) with a particularly high relative dielectric constant,
• 4. Application of a further translucent, solder-resistant cover layer ( 14 ), ( Fig. 7).

23. The method according to any one of claims 19 to 22, characterized in that a copper-clad printed circuit board is used as the base material ( 1 ). 24. The method according to any one of claims 19 to 23, characterized in that in a further step, a transparent protective layer ( 14 ), possibly provided with fluorescent color pigments, in particular in the form of a solder mask printing for electrical protection, and for protection against further process steps, for color design is applied. 25. The method according to any one of claims 19 to 24, characterized in that the insulation layers ( 5 ) have high backlighting. 26. The method according to any one of claims 19 to 25, characterized characterized in that the finished lighting element in a Injection mold is inserted and by means of transparent and colored, thermoplastic plastics to corresponding Is shaped and thereby optical lens effects and Light conduction effects, especially when using thermoplastics, such as polycarbonate (PC) and Polymethyl methacrylate (PMMA). 27. The method according to any one of claims 1 to 26, characterized characterized in that the circuit board base material in one further component assembly process to complex multifunction Lei plate systems is completed and one Soldering process is suspended. 28. The method according to any one of claims 19 to 27, characterized in that the planar electrodes ( 8 a, 8 b) are formed by pressing on a plastic-coated and appropriately treated copper foil. 29. The method according to any one of claims 19 to 28, characterized in that the planar electrodes ( 9 a, 9 b) are formed by screen printing various conductive pastes based on copper, silver or carbon.