Display Panel Second Metal Layer Resistance Uniformity
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Solution Overview
Problem
In Thin Film Transistor-Liquid Crystal Display (TFT-LCD) manufacturing, the overlapping patterns during the formation of metal layers lead to uneven line resistance, affecting the stability and uniformity of the display panel's electrical drive.
Innovation Solution
A display panel design with a first substrate featuring a first metal layer, a second metal layer, and an insulating layer, where the second metal layer includes horizontal and oblique zones with specific thickness and width ratios, ensuring equal resistances across zones and maintaining uniform line resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the second metal layer is formed with uniform thickness across overlapping and non-overlapping patterns, then the manufacturing process is simplified, but the line resistance becomes uneven affecting display uniformity
Solution Approach 1:
The patent applies local quality by creating different thickness zones within the second metal layer: a first thickness in non-overlapping patterns and a second thickness in overlapping patterns. This local differentiation compensates for the resistance increase in overlapping areas, achieving uniform line resistance across the entire display panel while maintaining manufacturing feasibility through localized process control.
Solution Approach 2:
The patent changes the thickness parameter of the second metal layer based on pattern location. By adjusting the thickness from a first value in non-overlapping areas to a second value in overlapping areas, the resistance parameter is compensated to achieve uniformity. This parameter change is implemented through controlled deposition processes that recognize pattern overlap conditions.
2Manufacturing precision
If the climbing position in the second metal layer manufacture procedure is adjusted to improve line stability, then the manufacturing precision improves, but the device complexity increases
Solution Approach 1:
The patent changes the thickness parameter of the second metal layer in overlapping patterns to compensate for resistance variations caused by climbing position effects. This parameter change approach simplifies the overall solution compared to precisely controlling climbing positions, as it addresses the resistance uniformity problem through a single controllable parameter (thickness) rather than multiple process variables.
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
The design ensures uniform and stable line resistance, enhancing the display panel's uniformity and stability by adjusting the thickness and width of oblique and horizontal zones in the second metal layer.
Implementation Method 1
an insulating layer, disposed between the first metal layer and the second metal layer; the first metal layer and the second metal layer are insulated
Implementation Method 2
the thickness of each of the horizontal zones of the second metal layer is greater than a thickness of each of the oblique zones of the second metal layer; and a width of each of the oblique zones of the second metal layer is greater than a width of each of the horizontal zones of the second metal layer
Data Source
AI summary
The present application discloses a display panel, a manufacture method and a display apparatus. The display panel includes a first substrate; the first substrate includes a base, a first metal layer, an insulating layer and a second metal layer; the second metal layer includes horizontal zones and oblique zones; each of the oblique zones is inclined from a first height to a second height; the first height is greater than the second height; a thickness of each of the horizontal zones of the second metal layer is greater than a thickness of each of the oblique zones of the second metal layer; and a width of each of the oblique zones of the second metal layer is greater than a width of each of the horizontal zones of the second metal layer.