Capacitive Touch Panel Pattern Layer for Seamless Electrode Layout
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Capacitive touch panels face higher costs and image quality issues due to seams between X-axis and Y-axis electrodes, which are typically formed on different transparent conductive layers, affecting their widespread implementation in consumer products.
Innovation Solution
The capacitive touch panel employs a pattern layer to separate X-axis and Y-axis electrodes, eliminating seams and improving image quality by using undercuts and photolithography processes to form orthogonal electrodes on the same or different surfaces of a substrate, ensuring no conduction between them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If X-axis electrodes and Y-axis electrodes are formed on different transparent conductive layers, then the capacitive touch panel can be manufactured with standard processes, but seams appear between electrodes affecting image quality
Solution Approach 1:
The patent merges the X-axis and Y-axis electrodes onto the same transparent conductive layer, eliminating the need for multiple layer alignment processes. This combining approach resolves the seam issue caused by misalignment between separate layers while maintaining manufacturing feasibility through single-layer patterning techniques.
Solution Approach 2:
The patent introduces a patterned transparent conductive layer that serves as an intermediary structure, where both X-axis and Y-axis electrodes are formed through selective patterning on the same layer. This intermediary approach allows precise electrode positioning without requiring multiple layer alignment, thus eliminating seams while preserving manufacturing compatibility.
2Manufacturing precision
If X-axis electrodes and Y-axis electrodes are formed on the same transparent conductive layer, then seams between electrodes are eliminated improving image quality, but manufacturing complexity increases
Solution Approach 1:
The patent segments the transparent conductive layer into different functional regions through photolithography patterning, creating distinct X-axis electrode areas and Y-axis electrode areas on the same layer. This segmentation approach enables precise electrode formation without requiring complex multi-layer structures, balancing image quality improvement with manufacturing feasibility.
Solution Approach 2:
The patent changes the patterning parameters of the transparent conductive layer, using photolithography to create orthogonal electrode patterns on a single layer. By adjusting patterning parameters such as photoresist thickness, exposure conditions, and etching parameters, the patent achieves precise electrode alignment and eliminates seams while maintaining manageable manufacturing complexity.
Data Source
AI summary
A seamless capacitive touch panel includes a substrate, a pattern layer, a first electrode, and a second electrode. The pattern layer is formed on the substrate. The first electrode is formed on the pattern layer. The second electrode is formed on the substrate. The first electrode and the second electrode are separated by the pattern layer for preventing conduction between the first and second electrodes.