Windowpane Flat-Conductor Soldering Buffer Layer
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Solution Overview
Problem
Existing windowpane connecting elements, particularly in composite glass panes, face mechanical stress issues due to soldering processes, leading to potential damage and increased costs from expensive connecting elements that are often rejected if not properly connected during manufacturing.
Innovation Solution
Incorporating an electrically insulating buffer layer between the conductive foil and the glass pane surface at soldering points to dampen heat effects and reduce mechanical stress, allowing for delayed connection of expensive elements post-manufacture and quality control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If soldering connections are made directly on the glass pane surface, then electrical connections are achieved, but mechanical stresses and thermal damage occur to the glass pane
Solution Approach 1:
The patent introduces a buffer layer composed of electrically insulating material positioned between the soldering point and the glass pane surface. This intermediary layer absorbs and dampens the mechanical stresses and thermal effects generated during soldering, preventing direct transmission to the glass pane while still allowing electrical connections to be made to the conductive foil.
Solution Approach 2:
The patent segments the connection structure into distinct functional layers: the glass pane surface, the buffer layer with electrically insulating material, and the conductive foil with soldering points. This segmentation allows each layer to perform its specific function independently - the buffer layer handles stress absorption while the conductive foil provides electrical connectivity.
2Reliability
If expensive connecting elements are pre-installed during manufacturing, then connection functionality is ensured, but value loss occurs when elements are rejected after quality control
Solution Approach 1:
The patent prepares the glass pane surface with a buffer layer and conductive foil structure during manufacturing, creating pre-equipped connection points that are ready for later connection of expensive elements. This preliminary preparation ensures proper positioning and stress protection without requiring the expensive connecting elements to be permanently installed during initial manufacturing.
Solution Approach 2:
The patent enables a dynamic connection approach where expensive connecting elements can be added, removed, or replaced after manufacturing based on quality control results and actual application needs. The buffer layer and conductive foil provide a stable foundation that accommodates these dynamic connection changes without compromising the overall structure.
3Weight of moving object
If thin glass panes less than 2 mm are used to reduce weight and thickness, then overall pane weight and thickness are reduced, but susceptibility to mechanical stress and breakage increases
Solution Approach 1:
The patent applies a buffer layer with electrically insulating material beforehand on the glass pane surface at locations where soldering stresses will occur. This cushioning layer is specifically positioned to protect thin glass panes from the mechanical stresses of subsequent soldering operations, compensating for the reduced inherent strength of thinner glass materials.
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 solution reduces the risk of thermal damage and mechanical stress on the glass pane, enabling the use of connecting elements on both monolithic and composite glass, while minimizing material costs and value loss by allowing for post-manufacture connection and quality assessment.
Implementation Method 1
between said conductive foil with a soldering point for making electrical contact with the conductive structure and the surface of the glass pane, an electrically insulating buffer layer is provided which dampens heat effects to a certain extent
Implementation Method 2
The bonding layer for bonding the outer end section of the connecting cable to the outside of the glass pane is preferably composed of an adhesive based on acrylate, silicone rubber or polysiloxane
Data Source
Figure 1~2
Figure 3
AI summary
The present invention describes a windowpane, in particular vehicle windowpane, having at least one flat-conductor soldered connecting element for making electrical contact, which flat-conductor soldered connecting element has at least one electrically insulating plastic layer and one electrically conductive layer or foil which is connected to a soldering surface for soldering on a line connection which leads on from the windowpane, and which flat-conductor soldered connecting element is adhesively attached to an outer surface of the windowpane, characterized in that at least one electrically insulating buffer layer is provided between a section of the electrically conductive layer or foil with a freely exposed soldering surface, on the one hand, and the surface of the windowpane, on the other.