Array Substrate Discharge Layer for TFT Electrostatic Damage
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Solution Overview
Problem
The array substrate in TFT-LCD devices is prone to electrostatic discharge due to charge accumulation during the preparation process, leading to structural damage and reduced yield.
Innovation Solution
The array substrate design includes a discharge layer connected to signal lines through through holes, allowing accumulated charge to be released, reducing the risk of electrostatic damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the array substrate preparation process is continued, then more circuit structures can be formed, but charge accumulation increases leading to electrostatic discharge and structural damage
Solution Approach 1:
The patent converts the harmful accumulated charge into a beneficial effect by introducing a discharge layer that acts as a charge release mechanism. The discharge layer is formed in communication with through holes in the insulating layer, allowing accumulated charge to be safely discharged to the substrate, thereby preventing electrostatic discharge damage while continuing the preparation process
Solution Approach 2:
The discharge layer serves as an intermediary component between the insulating layer and the substrate. It provides a controlled path for charge discharge, mediating between the charge accumulation problem and the substrate to prevent direct electrostatic damage to the circuit structures
2Reliability
If the insulating layer is made thicker to provide better protection, then charge accumulation is reduced, but the complexity of the structure increases
Solution Approach 1:
The patent segments the insulating layer into multiple layers (first insulating layer and second insulating layer) with different functions. The first insulating layer provides charge protection, while the second insulating layer provides additional insulation and protection for the thin film transistor. This segmentation allows each layer to be optimized for its specific function without unnecessarily increasing overall complexity
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 design effectively prevents further charge accumulation at critical points, enhancing the yield and reliability of the array substrate by mitigating electrostatic discharge.
Implementation Method 1
some parts are prone to accumulate charges and eventually form electrostatic discharge, resulting in partial structural damage to the circuit
Implementation Method 2
a discharge layer, located on a side of the second insulating layer away from the carrier substrate and connected with at least one of the first signal line and the second signal line
Data Source
AI summary
The present application relates to the field of display panels, and provides an array substrate and a display panel. The array substrate includes a carrier substrate, a first signal line, a first insulating layer, a second signal line, a thin film transistor, a second insulating layer, and a discharge layer; the first insulating layer covers the first signal line and provides with a first through hole; the second signal line is located on a side of the first insulating layer away from the carrier substrate and connected with the first signal line through the first through hole; the second insulating layer covers the thin film transistor and the second signal line; the discharge layer is located on the surface of the second insulating layer and is connected to at least one of the first signal line and the second signal line.