Touch Module Moisture Blocking Film for Flexible Base Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current touch modules with flexible bases are ineffective in blocking moisture, leading to corrosion of touch electrodes and reduced reliability.
Innovation Solution
A touch module design that includes a moisture blocking film directly disposed on the flexible base before forming touch electrodes, with the film providing a barrier between the flexible base and the touch structure to prevent moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible base is used in the touch module, then the flexibility and adaptability of the touch module are improved, but the moisture blocking capability deteriorates, leading to corrosion of touch electrodes
Solution Approach 1:
The patent applies composite materials by combining the flexible base material with a moisture blocking film having different material properties. The moisture blocking film is disposed on the flexible base to create a composite structure that simultaneously provides flexibility from the base and moisture blocking capability from the film, resolving the contradiction between flexibility and moisture protection.
Solution Approach 2:
The moisture blocking film acts as an intermediary layer between the flexible base and the touch electrodes. This intermediate film prevents direct contact between moisture and the touch electrodes while maintaining the flexibility of the base, thus protecting the electrodes without compromising the flexible nature of the module.
2Reliability
If a moisture blocking film is added to the touch module, then the moisture blocking capability is improved, but the device complexity increases
Solution Approach 1:
The patent uses a thin film structure for the moisture blocking film that is disposed on the flexible base. This thin film approach provides effective moisture blocking without adding significant structural complexity or thickness to the overall device, maintaining simplicity while improving reliability.
3Reliability
If the moisture blocking film is disposed before forming touch electrodes, then the moisture blocking effect is improved, but the manufacturing process complexity increases
Solution Approach 1:
The moisture blocking film is disposed on the flexible base before the touch electrodes are formed. This preliminary action ensures that the moisture blocking layer is in place before the electrodes are created, providing optimal protection. The sequence is integrated into the manufacturing process to minimize additional complexity.
Data Source
AI summary
A touch module includes a flexible base, a moisture blocking film and a touch structure. The moisture blocking film has a first surface and a second surface opposite to the first surface, and the first surface directly contacts the flexible base. The touch structure is disposed on the second surface of the moisture blocking film and includes a first conductive layer disposed on the second surface, a first insulating layer disposed on the first conductive layer, a second conductive layer disposed on the first insulating layer and a second insulating layer disposed on the second conductive layer. An area of the moisture blocking film is greater than or equal to the sum of the areas of the touch electrode region and the peripheral circuit region of the touch structure. The water vapor transmission rate of the moisture blocking film is less than 5.0*10−4 g/(m2*day).