Touch Screen Panel Adhesive Layer Integration
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Solution Overview
Problem
The manufacturing process of touch screen panels with integrated touch sensing sensors is complex, leading to increased costs and defects due to the formation of connecting portions and potential residue from etching processes, which can result in corrosion and moisture permeation.
Innovation Solution
A simplified manufacturing method involving the formation of touch electrodes on a substrate, followed by an insulating layer, an adhesive layer with a protective film, and a conductive layer on the adhesive protection film, which reduces impurities and enhances durability by preventing moisture and oxygen permeation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a touch screen panel is formed to have a plurality of layers with connecting portions, then the touch sensing function is achieved, but the fabrication yield is reduced and cost increases
Solution Approach 1:
The patent combines the touch electrode layer and the adhesive layer into a single integrated layer structure. The touch electrode pattern is directly formed on the adhesive layer, eliminating the need for separate connecting portions and intermediate layers. This merging reduces the number of manufacturing steps, improves fabrication yield, and lowers production cost while maintaining the touch sensing function.
Solution Approach 2:
The adhesive layer serves multiple functions simultaneously: it acts as both the adhesive material for bonding layers together and as the substrate for forming the touch electrode pattern. This multi-functionality eliminates the need for separate dedicated electrode connection structures, simplifying the overall device architecture and manufacturing process.
2Manufacturing precision
If connecting portions are formed as minute patterns, then the touch sensing precision is improved, but steps are generated and etching residues cause corrosion
Solution Approach 1:
The patent extracts and eliminates the etching process from the manufacturing flow by forming the touch electrode pattern through printing or other residue-free deposition methods on the adhesive layer. This removes the source of harmful etching residues that cause corrosion, while still achieving precise minute patterns for accurate touch sensing.
Solution Approach 2:
The patent uses a disposable adhesive layer that is discarded after serving its purpose of providing a substrate for electrode formation. This eliminates the need for complex, expensive, and harmful etching processes, replacing them with simpler, cleaner methods that don't generate corrosive residues.
3Reliability
If multiple layers are stacked to form touch sensing sensor, then the sensing capability is enhanced, but moisture permeation increases and durability decreases
Solution Approach 1:
The patent uses the adhesive layer as a flexible thin film that serves as both the bonding material and the electrode substrate. This integrated structure reduces the number of interfaces and potential moisture pathways compared to traditional multi-layer stacks, while maintaining the necessary sensing capability through proper material selection and结构设计.
Data Source
AI summary
A touch screen panel includes: a substrate; a touch electrode layer disposed on the substrate; an insulator disposed on the touch electrode layer; an adhesive layer disposed on the touch electrode layer and exposing a portion of the insulator; and a first connector disposed on the portion of the insulator exposed by the adhesive layer. When assembled, the touch screen panel may reduce or prevent impurities, such as moisture and the like, from permeating into a touch sensing sensor, thereby reducing defects of the touch sensing sensor and enhancing durability thereof.