Touch Panel Insulator Layer Ammonia Gas Barrier
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Capacitive touch panels face issues with polarizer fading due to ammonia gas escaping from silicon nitride thin films, which affects the reliability and durability of the touch control structure.
Innovation Solution
Incorporating a blocking layer in conjunction with a silicon nitride layer within the insulator layer to prevent ammonia gas from reaching the polarizer, maintaining the dielectric and optical properties of the touch panel while enhancing breakdown voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a silicon nitride layer is used in the insulator layer, then the dielectric properties and breakdown voltage are improved, but ammonia gas escapes from the silicon nitride layer causing polarizer fading
Solution Approach 1:
A blocking layer is introduced as an intermediary between the silicon nitride layer and the polarizer. This blocking layer acts as a mediator that allows the silicon nitride layer to maintain its dielectric function while preventing ammonia gas from reaching and degrading the polarizer.
Solution Approach 2:
The insulator layer is transformed from a single-material silicon nitride structure to a composite structure consisting of multiple layers including the silicon nitride layer and the blocking layer. This composite structure combines the dielectric advantages of silicon nitride with the protective function of the blocking layer against ammonia gas escape.
2Reliability
If the insulator layer is made thicker to improve insulation, then breakdown voltage increases, but the touch panel structure becomes more complex
Solution Approach 1:
The insulator layer is segmented into multiple functional sub-layers: the silicon nitride layer provides dielectric strength and breakdown voltage, while the blocking layer prevents ammonia gas escape. This segmentation allows each layer to be optimized for its specific function rather than requiring a single thick layer to handle all requirements.
Solution Approach 2:
Different regions of the insulator layer are assigned different materials and properties: the silicon nitride layer is optimized for electrical insulation and breakdown voltage, while the blocking layer is optimized for chemical barrier properties. This local quality differentiation allows the structure to achieve high reliability without excessive overall thickness.
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
Effectively prevents polarizer fading by using a composite insulator layer with a blocking layer to trap ammonia gas, ensuring the touch panel's reliability and performance.
Implementation Method 1
a blocking layer on a side of the silicon nitride layer away from the substrate... to prevent ammonia gas from reaching the polarizer
Data Source
AI summary
A touch panel and a manufacturing method thereof, and a display device. An insulation layer (4) positioned between a substrate (1) and a polarizer (3) is configured to comprise a silicon nitride layer (41) and a barrier layer (42) positioned at one side of the silicon nitride layer (41) away from the substrate (1). The barrier layer (42) can serve as a covering layer that stops an ammonia gas escaped from the silicon nitride layer (41) from moving to the polarizer (3) so as to prevent fading of the polarizer. The insulation layer (4) is configured to comprise two thin layers, namely a silicon nitride layer (41) and a barrier layer (42).