Conductive Coating Window Openings for Reliable Electrical Contact
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Solution Overview
Problem
Existing glazing panels with electronic components face challenges in achieving low-emissivity and high light transmission while maintaining neutral color and economic production, as well as in establishing reliable and reproducible electrical connections between electronic components and conductive coatings, which often result in high electrical resistance and unpredictable contact quality.
Innovation Solution
A glazing panel design featuring a conductive coating with a metal layer positioned between the glass sheet and an insulating layer, including window openings in the insulating layer to facilitate direct electrical contact with the metal layer, reducing the need for high voltages and enhancing contact stability and reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent conductive coating is used to supply electronic components, then electrical connection is achieved, but the connection reliability is poor with high electrical resistance and unpredictable contact quality
Solution Approach 1:
The conductive coating is segmented into multiple metal layers (e.g., silver, aluminum) with different electrical conductivities and optical properties. This segmentation allows optimization of both electrical connection reliability and optical transparency, as each layer can be tailored for specific functions in the connection pathway.
Solution Approach 2:
The coating structure is modified locally at the connection points to electronic components, creating enhanced contact zones with improved electrical conductivity. This local quality enhancement ensures reliable electrical connection while maintaining overall coating transparency and low-emissivity properties.
2Illumination intensity
If metal layers are made thinner to maintain high light transmission, then visible light transmission is improved, but the ability to reflect infrared radiation is reduced
Solution Approach 1:
The conductive coating uses composite metal layer structures combining different metals (e.g., silver, aluminum, nickel) with complementary properties. This composite approach enables simultaneous optimization of visible light transmission and infrared radiation reflection by leveraging the unique optical characteristics of each metal layer.
Solution Approach 2:
Multiple metal layers are nested within each other, with each layer serving specific optical functions. The nested structure allows thin individual layers to collectively achieve both high visible transmission and effective infrared reflection through cumulative optical effects.
3Loss of energy
If low-emissivity coatings are applied to reflect infrared radiation, then heat loss is reduced, but the color neutrality and production cost are compromised
Solution Approach 1:
The optical parameters of the metal layers (thickness, composition, arrangement) are precisely controlled during deposition to achieve low-emissivity performance. By optimizing these parameters, the coating reflects infrared radiation effectively while maintaining color neutrality and using cost-effective metal combinations.
Solution Approach 2:
The conductive coating serves multiple functions simultaneously: electrical conduction, visible light transmission, infrared radiation reflection, and color neutrality. This multi-functionality is achieved through carefully designed metal layer compositions that satisfy all requirements without requiring separate specialized coatings.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design achieves lower electrical resistance, more stable and predictable contacts, and reduces the risk of damaging electronic components, while maintaining low-emissivity and high light transmission properties, and is cost-effective to produce.
Implementation Method 1
Glazing panels which exhibit the property of reflecting external infrared radiation (for example solar radiation) in order to limit overheating inside a building or a motor vehicle related to this radiation
Implementation Method 2
an electrically conductive coating, the conductive coating comprising at least one stack of a metal layer and of an insulating layer
Data Source
AI summary
The invention relates to a glass panel (200), including: a first glass sheet (20) at least partially coated with an electrically conductive coating (21), the conductive coating including at least one stack consisting of a metal layer (212) and an insulating layer (213), the metal layer being arranged between the first glass sheet and the insulation layer; at least one electronic component (23) arranged on the first glass sheet (21), the electronic component including at least one connection terminal (231) electrically connected to the conductive coating. According to the invention, the insulation layer (213) in such a panel includes at least one first window (241) which opens onto the metal layer and which is located at the connection terminal.