DE10259828B4 - Vehicle roof element and manufacturing method therefor - Google Patents

Abstract

At least one partially transparent element (10) for a vehicle roof, comprising a glass pane (12), an electrical load (26) and an electrically conductive layer arrangement connected to the glass pane, comprising a first and second electrical contact (16, 22) for a power source and a first and a second terminal (32, 34) for the consumer (26), wherein the layer arrangement has a first (14) and a second electrically conductive layer (20) which is isolated from one another by a first electrically insulating layer (18) with the first terminal (34) and the first contact (16) in conductive connection with the first conductive layer (14) and the second terminal (32) and the second contact (22) with the second conductive layer (20) but each are electrically insulated with respect to the other conductive layer, and wherein the first conductive layer (14) is conductive over the first terminal (32) and the second conductive layer (20) second terminal (34) are in conductive connection with the load (26), wherein on the side facing away from the first insulating layer (18) side of the second conductive layer (20), a second electrically insulating layer (24) is applied and the first terminal (34) is passed as a via through the second conductive layer (20) and the first (18) and the second insulating layer (24), and the second terminal (32) guided through the second insulating layer (24) as a via and further providing the material of the second insulating layer (24) for insulating the first terminal (34) with respect to the second conductive layer (20).

Description

The present invention relates to an at least partially transparent, electrically conductive element for a vehicle roof and to a corresponding production method.

From the GB 2 357 638 A a glass pane for a vehicle window is known, which is provided with an electrically conductive layer which forms on the one hand the leads for a heating element and further the heating element itself.

From the US 5 528 314 It is known to integrate an electric antenna in a double glass pane of a vehicle window.

From the DE 196 30 812 A1 , of the EP 1 234 721 A2 as well as the DE 196 30 813 A1 It is known to provide a transparent pane for a vehicle roof with an electrochromic layer arrangement.

From the DE 102 04 359 A1 It is known to integrate light-emitting diodes in the enclosure of a glass lid to illuminate the lid.

From the GB 817 230 a coating acting as a heating arrangement for a vehicle window pane is known which has the following layer structure: glass pane, first metal oxide layer, first metal layer, second metal oxide layer, second metal layer, protective layer. The coating is subjected to a heat treatment after application, whereby a coating with relatively low electrical resistance and relatively high hardness is achieved.

The DE 101 26 868 C1 discloses a disk with an electroluminescent lamp.

In the DE 41 05 396 A1 a solar cover for a vehicle is described.

It is an object of the present invention to provide an at least partially transparent element for a vehicle roof, which is also designed for the power supply of an electrical consumer, can be produced in a relatively simple manner, has a relatively good electrical conductivity and aesthetically pleasing as possible can be. In particular, the electrical leads for the electrical load for the vehicle occupants should not be visible as possible. Furthermore, a corresponding manufacturing method for such a roof element to be created.

This object is achieved by a roof element according to claim 1 and a manufacturing method according to claim 11.

In the case of the solution according to the invention, it is advantageous that the two electrically conductive layers can be formed flat therebetween due to the provision of an electrically insulating layer, as a result of which a complicated and visually disturbing formation of galvanically separated conductor tracks is not required; d. h., By the fact that the layers are arranged one above the other, can be dispensed with a lateral structuring.

The layer structure according to the invention is particularly advantageous if the electrically conductive layers are metal layers and the electrically insulating layers are layers of the respective metal oxide. In this case, both a high electrical conductivity and a simple layer application can be achieved.

Further preferred embodiments of the invention will become apparent from the dependent claims.

In the following the invention will be described by way of example with reference to the accompanying drawing which shows a cross-sectional view of a roof element according to the invention.

In the single drawing is schematically the structure of an at least partially transparent lid 10 shown for a vehicle roof. This can be an adjustable lid that can be opened or a cover that is firmly attached to the body.

The lid 10 includes a glass pane 12 made of toughened safety glass (ESG), on its underside a first metal layer 14 is applied, with a contact or a contact 16 is provided for a power source. On the first metal layer 14 is a first electrically insulating oxide layer 18 applied, on which in turn a second electrically conductive metal layer 20 is applied, with a contact 22 provided for the power source. On the second metal layer 20 is a second insulating oxide layer 24 applied, which is a light emitting diode 26 wearing. The completion of the layer arrangement towards the vehicle interior forms a cover sheet 28 , which consists for example of thin glass, PET or polycarbonate and by means of an adhesive film 30 on the second oxide layer 24 is glued on. The cover sheet 28 is preferably coated with a hardcoat layer (not shown). Alternatively, the completion of the layer assembly could be done instead of the cover sheet 28 be formed by a second glass pane, thereby interacting with the first glass pane 12 then one Composite of laminated safety glass (VSG) is realized, which contains the functional layers.

The light-emitting diode 26 is by means of a connection 32 that with the second metal layer 20 is in conductive communication and through the second oxide layer 24 is contacted, as well as a connection 34 that with the first metal layer 14 is conductively connected and through the layers 24 . 20 and 18 is contacted through the second metal layer 20 or the first metal layer 14 with the respective power source contacts 22 respectively. 16 connected is connected in this way to the power source. The material of the second oxide layer 24 serves to the through-connection of the connection 34 electrically with respect to the second metal layer 20 to isolate.

In the manufacture, the layers are starting with the first metal layer 14 , applied sequentially, with the vias for the connections 32 and 34 be formed by the partial sticking of corresponding film masks at the contact point. The contacts 16 and 22 for the power source can be similarly formed during the coating process by a corresponding masking.

In the manufacturing process, the disc becomes 12 first cleaned before the first conductive layer 14 is applied. Subsequently, a first Klebemaskierung for the connection 34 on the layer 14 glued on before the first insulating layer 18 is applied. Then a second adhesive masking for the connection 34 which projects beyond the first adhesive masking, attached to the first adhesive masking before the second conductive layer 20 is applied. Subsequently, the second adhesive masking is peeled off and there is a third Klebemaskierung for connection 32 applied before the second insulating layer 24 is applied. Then all the adhesive masks are removed and the connections 32 and 34 be by bonding or soldering the light emitting diode 26 produced. Finally, the adhesive film 30 and the protective film or the thin glass 28 placed on the layer sequence and then laminated.

The protective layer 28 serves to the second oxide layer 24 and the light emitting diode 26 to protect against mechanical damage, the layer 30 for gluing or laminating the protective layer 28 serves. At the shift 30 it may be an adhesive film of, for example, polyvinyl butyral (PVB), polyurethane (PU) or ethylene vinyl acetate (EVA).

It is understood that a plurality of light emitting diodes in the manner of the light emitting diode 26 may be provided, these light-emitting diodes through the protective layer 28 through radiating light into the vehicle interior. Instead of light-emitting diodes, it is also possible to provide other light sources or light sources as electrical consumers.

The layers 14 . 18 . 20 and 24 are preferably over the entire surface of the glass 12 intended. If multiple electrical loads are provided, these are then connected in electrical parallel connection with the power source.

Conveniently, the contacts 16 . 22 for the power source so arranged that the supply line over the metal layers 14 and 20 is as short as possible and forms a uniform voltage drop across the conductive surfaces, which can also be influenced by the dimensions (eg different sized contact surfaces) of the contact between the conductive layer and the electrical cable.

For example, titanium may be used as material for the metal layers, the oxide layers then being made of titanium oxide. As a layer thickness, for example, 25 nm can be selected for each layer. This makes it possible to achieve a light transmission of about 12% in the visible spectral range. Alternatively, for example, aluminum may also be used for the metal layers, for example with a layer thickness of 20 nm, wherein the oxide layers then consist of aluminum oxide, for example with a layer thickness of 30 nm. With such a metal / metal oxide layer construction, a tint can be obtained, which is perceived as neutral gray. Another advantage of the use of metal layers is that they show a high infrared reflection with low absorption in comparison, for example, to mass-colored glass, whereby excessive heating of the vehicle interior by solar radiation can be prevented.

Furthermore, the use of metal oxides in the insulating layers has the advantage that these oxide layers can be produced in the same coating system as the corresponding conductive metal layers. If the oxide of the oxide layer is an oxide of the corresponding metal layer, on the one hand, therefore, the production can be made particularly efficient; On the other hand, the similarity of the solid-state structure of the layers achieved thereby is advantageous. However, there may also be reasons to use oxide layers that are not an oxide of the metal layer.

In principle, in addition to the metals described also other metals with appropriate conductivity for the conductive layers in question, z. As silver, copper or gold.

However, the conductive layers need not necessarily be metal layers, but may for example be formed as conductive oxide layers. For example, the first conductive layer 14 be formed by a layer of indium tin oxide (ITO), which is already before the bending process of the glass sheet 12 pyrolytic on the glass pane 12 is applied. After application of the insulating layer 18 could then by a vacuum method, another conductive oxide layer or a metal layer as a second conductive layer 20 be applied.

LIST OF REFERENCE NUMBERS

10

cover

12

pane

14

metal layer

16

Contact

18

metal

20

metal layer

22

Contact

24

metal

26

led

28

protector

30

adhesive film

32

Connection for 26

34

Connection for 26

Claims (15)

Minimum partially transparent element ( 10 ) for a vehicle roof, with a glass pane ( 12 ), an electrical consumer ( 26 ) and an electrically conductive layer arrangement connected to the glass pane, which have a first and second electrical contact ( 16 . 22 ) for a power source and a first and a second terminal ( 32 . 34 ) for the consumer ( 26 ), wherein the layer arrangement comprises a first ( 14 ) and a second electrically conductive layer ( 20 ) formed by a first electrically insulating layer ( 18 ) are isolated from one another, the first connection ( 34 ) and the first contact ( 16 ) with the first conductive layer ( 14 ) and the second connection ( 32 ) and the second contact ( 22 ) with the second conductive layer ( 20 ) are electrically conductive, but are each electrically insulated with respect to the other conductive layer, and wherein the first conductive layer ( 14 ) over the first connection ( 32 ) and the second conductive layer ( 20 ) via the second connection ( 34 ) in a liaison with the consumer ( 26 ), wherein on the first of the insulating layer ( 18 ) facing away from the second conductive layer ( 20 ) a second electrically insulating layer ( 24 ) and the first connection ( 34 ) as a via through the second conductive layer ( 20 ) and the first ( 18 ) and the second insulating layer ( 24 ), and the second port ( 32 ) as a via through the second insulating layer ( 24 ) and also the material of the second insulating layer ( 24 ) for the isolation of the first terminal ( 34 ) with respect to the second conductive layer ( 20 ). Roof element according to claim 1, characterized in that the consumer ( 26 ) on the second insulating layer ( 24 ) is arranged. Roof element according to one of claims 1 or 2, characterized in that a protective layer ( 28 ) for the second insulating layer ( 24 ) and the consumer ( 26 ) is provided. Roof element according to claim 3, characterized in that the protective layer ( 28 ) by means of an adhesive film ( 30 ) on the second insulating layer ( 24 ) is applied. Roof element according to one of the preceding claims, characterized in that it is at the consumer ( 26 ) is a light source, in particular light emitting diode acts. Roof element according to claim 5, characterized in that the layer arrangement ( 14 . 18 . 20 . 24 ) and the light emitting diode ( 26 ) on the inside of the glass pane ( 12 ) are arranged, wherein the light-emitting diode is provided as illumination for the vehicle interior. Roof element according to one of the preceding claims, characterized in that the first conductive layer ( 14 ) directly onto the glass pane ( 12 ) is applied. Roof element according to one of the preceding claims, characterized in that the two conductive layers ( 14 . 20 ) and the two insulating layers ( 18 . 24 ) each consist of the same material. Roof element according to claim 8, characterized in that the two conductive layers ( 14 . 20 ) consist of metal and the two insulating layers ( 18 . 24 ) consist of an oxide of this metal. Roof element according to claim 9, characterized in that it is the metal is aluminum or titanium. Method for producing a minimum partially transparent element ( 10 ) for a vehicle roof, wherein a glass pane ( 12 ) an electrically conductive layer arrangement is applied, which has a first and a second electrical contact ( 16 . 22 ) for a power source and a first and a second terminal ( 32 . 34 ) for one Consumer ( 26 ), wherein the layer arrangement is formed by a first electrically conductive layer ( 14 ) is applied to the first electrically conductive layer, a first electrically insulating layer ( 18 ) is applied to the first electrically insulating layer, a second conductive layer ( 20 ), wherein the first terminal and the first contact with the first conductive layer and the second terminal and the second contact with the second conductive layer are brought into conductive connection, but each electrically insulated with respect to the other conductive layer, and wherein the first conductive layer ( 14 ) over the first connection ( 32 ) and the second conductive layer ( 20 ) via the second connection ( 34 ) in a conducting relationship with the consumer ( 26 ), and on which of the first insulating layer ( 18 ) facing away from the second conductive layer ( 20 ) a second electrically insulating layer ( 24 ) and the first connection ( 34 ) as a via through the second conductive layer ( 20 ) and the first ( 18 ) and the second insulating layer ( 24 ), and the second port ( 32 ) as a via through the second insulating layer ( 24 ), and also the material of the second insulating layer (FIG. 24 ) for the isolation of the first terminal ( 34 ) with respect to the second conductive layer ( 20 ). Method according to claim 11, characterized in that the contact points for the contacts ( 16 . 22 ) are formed by masking during the coating process. A method according to claim 12, characterized in that the masking is adhered. Method according to one of claims 11 to 13, characterized in that on the of the first insulating layer ( 18 ) facing away from the second conductive layer ( 20 ) a second electrically insulating layer ( 24 ) is applied. Method according to claim 14, characterized in that the first connection ( 34 ) as a via through the second conductive layer ( 20 ) and the first ( 18 ) and the second insulating layer ( 24 ), and the second port ( 32 ) is made as a through-hole through the second insulating layer, wherein the openings for the through-connection of the first and the second terminal by sticking of foil masks are created during the coating process.

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