Concave Convex Electrode Pattern for Protective Film Positioning
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Solution Overview
Problem
Existing methods for applying a protective film on an electrode substrate using the ink jet method struggle with accurately adjusting the position of the film's end portion, leading to fluctuations in the exposed area of sensing electrodes, which can result in increased connection resistance and decreased performance.
Innovation Solution
The electrode substrate is designed with a concave/convex pattern on the substrate or electrode, allowing the protective film to be accurately positioned by controlling the spread of the coating liquid, thereby maintaining consistent exposure of the sensing electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the coating liquid is applied on the substrate by using the ink jet method, then the protective film can be formed to cover the sensing electrode, but it is difficult to highly accurately adjust the position of the end portion of the coating liquid spread over the substrate
Solution Approach 1:
A position adjustment pattern consisting of convex portions is introduced as an intermediary structure between the coating liquid and the substrate. This pattern serves as a physical reference that mediates the positioning process, allowing the end portion of the coating liquid to be accurately aligned by matching it with the convex portions during the ink jet application process.
Solution Approach 2:
The position adjustment pattern is formed on the substrate before the coating liquid is applied. By pre-establishing the convex portions as positioning references, the system enables accurate positioning of the protective film's end portion during the subsequent coating process, rather than attempting to control the liquid's spread after application.
2Reliability
If the position of the end portion of the protective film is not accurately adjusted, then the area of the exposed sensing electrode fluctuates among multiple sensing electrodes, but this leads to increased connection resistance and decreased performance
Solution Approach 1:
The position adjustment pattern acts as a mediator that ensures uniform positioning of the protective film across all sensing electrodes. By providing consistent convex reference structures, it eliminates fluctuations in the exposed area of sensing electrodes, thereby maintaining reliable and consistent electrical connection resistance across the entire array.
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 approach enables precise adjustment of the protective film's position, reducing fluctuations in the exposed area of the sensing electrodes and maintaining optimal connection resistance, thus enhancing the performance of the electrode substrate.
Implementation Method 1
controlling the spread of the coating liquid
Data Source
AI summary
A detection device is provided including first substrate including first region, second region and third region arranged in first direction, second region arranged between first and third regions; first detection electrode arranged on first substrate; second detection electrode arranged on first substrate and being adjacent to first detection electrode; first electrode coupled to first detection electrode and continuously formed from first to third regions; second electrode coupled to second detection electrode, and continuously formed from first to third regions, convex portions located between first electrode and second electrode in second region and spaced away from first and second electrodes; and protective layer formed on first and second electrodes in first region and not formed on first electrode and second electrode in third region, wherein at least one of convex portions is covered with protective layer, and at least another one of convex portions is not covered with protective layer.