TFT Anti-Reflection Layer for Light-Stable Oxide Active Layers
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Solution Overview
Problem
Oxide semiconductor thin film transistors are prone to performance changes and failure due to light irradiation, affecting their stability and reliability.
Innovation Solution
A display panel design incorporating a thin film transistor layer with an anti-reflection layer positioned between the metal layer and the active layer, where the anti-reflection layer has a lower reflectivity than the metal layer, reducing light exposure to the active layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an oxide semiconductor thin film transistor uses oxide as an electron channel to achieve higher mobility and lower leakage current, then the transistor performance is improved, but the active layer becomes greatly affected by light causing performance changes and failure
Solution Approach 1:
The patent introduces an anti-reflection layer as an intermediary between the metal layer and the active layer. This layer mediates the interaction between light and the active layer by absorbing or scattering incident light, thereby protecting the oxide semiconductor active layer from light-induced performance degradation while maintaining the electrical performance benefits of the oxide channel
Solution Approach 2:
The patent converts the harmful effect of light reflection (which causes active layer degradation) into a beneficial protective mechanism. By designing the anti-reflection layer with specific optical properties, the structure that would normally reflect harmful light is instead used to absorb and dissipate light energy, transforming the potential harm into a protective function
2Reliability
If a metal layer is used in the thin film transistor structure to achieve good electrical conductivity, then the transistor electrical performance is improved, but the metal layer reflects light onto the active layer causing performance changes
Solution Approach 1:
The anti-reflection layer serves as an intermediary positioned between the metal layer and the active layer. It intercepts light reflected from the metal layer and prevents it from reaching the active layer, thereby eliminating the harmful light reflection effect while preserving the metal layer's electrical conductivity function
Solution Approach 2:
The patent segments the functional layers by inserting the anti-reflection layer between the metal layer and the active layer. This segmentation separates the electrical conduction function (metal layer) from the light interaction function (anti-reflection layer), allowing each layer to perform its primary function without interfering negatively with the other
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
This configuration enhances light absorption and reduces the risk of failure, thereby improving the stability and reliability of the thin film transistor layer.
Implementation Method 1
a reflectivity of the anti-reflection layer is less than a reflectivity of the metal layer... enhances light absorption and reduces the risk of failure
Data Source
AI summary
The present disclosure provides a display panel, a manufacturing method thereof, and a display device. The display panel includes a substrate and a thin film transistor layer disposed on the substrate, wherein the thin film transistor layer includes an active layer, a metal layer, and an anti-reflection layer; the anti-reflection layer is at least disposed on a side of the metal layer close to the active layer, and a reflectivity of the anti-reflection layer is less than a reflectivity of the metal layer.