Touch Panel Manufacturing Method Simplifying Pad Formation Sequence
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The conventional touch panel manufacturing process is complex and limits production capacity, with the formation of first pad strings and second pads causing charring of the black matrix layer, leading to potential short circuits and quality issues.
Innovation Solution
A simplified manufacturing method where the buffering layer and transparent conductive layer are pre-formed on the substrate, allowing for the formation of isolated pad strings and pads before the shading layer, thus avoiding charring and ensuring electrical insulation, with signal wires and wire bridges connected after the shading layer is formed, and covered to prevent external interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional method forms first pad strings and second pads after forming the black matrix layer, then the pad structures can be properly formed, but the processing temperature causes charring of the black matrix layer, leading to potential short circuits and quality issues
Solution Approach 1:
The patent applies preliminary action by forming the first pad strings and second pads on the buffering layer before forming the black matrix layer (shading layer). This sequence ensures that the pad structures are already in place and can be properly insulated, while the subsequent formation of the shading layer prevents charring issues and avoids short circuits.
2Reliability
If the conventional method forms first pad strings and second pads through multiple steps including buffering layer formation and transparent conductive layer etching, then the pad structures can be formed, but the process complexity reduces production capacity
Solution Approach 1:
The patent uses preliminary action by pre-forming the buffering layer with the first pad strings and second pads before subsequent processing steps. This allows for efficient mass production while ensuring proper pad structure formation and electrical insulation, thereby increasing production capacity without compromising reliability.
3Manufacturing precision
If the black matrix layer is formed before the first pad strings and second pads, then the wiring area can be properly defined, but the temperature processing causes the black matrix layer to char and become conductive, leading to short circuits
Solution Approach 1:
The patent applies preliminary action by forming the pad structures on the buffering layer before creating the shading layer. This ensures that the wiring area is properly defined and that the pad structures are in place before any temperature processing, preventing charring-induced conductivity and short circuits.
Solution Approach 2:
The patent uses the buffering layer as an intermediary substrate that supports the formation of pad structures before the shading layer is applied. This intermediary layer allows for proper wiring area definition and pad formation while protecting against the harmful effects of temperature processing on the black matrix layer.
Data Source
AI summary
The present invention relates to a touch panel and a manufacturing method thereof. The method comprises steps of providing a base having a substrate, a buffering layer and a transparent conductive layer, forming multiple first pad strings, multiple second pads and an isolated pad by etching the transparent conductive layer, forming a shading layer on the isolated pad and then sequentially forming insulating layers, wire bridges, signal wires and cover pieces to complete the touch panel. The method of the invention is simplified, such that the production capacity is increased. The step of forming the shading layer is after the step of forming the first pad strings and the second pads, such that the shading layer would not be charred in the step of forming first pad strings and the second pads.