Segmented Double-Layer Fanout Lines for Display Array Substrates
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Solution Overview
Problem
In display panels, the resistance of fanout lines increases due to disconnections in the first and second wires, leading to signal loss and the appearance of light lines, which affects the display effect.
Innovation Solution
A double-layer wire structure is implemented for fanout lines, with the first wire and second wire divided into sections connected through via holes and a conductive bridge layer, ensuring that only the resistance at the broken section is affected, minimizing signal loss and preventing light lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the fanout line is designed with a double-layer wire structure (first wire and second wire stacked) to reduce resistance, then the signal loss is reduced, but the risk of disconnection increases due to film-forming foreign matter, causing light lines to appear on the display image
Solution Approach 1:
The first wire and second wire are divided into multiple sections along their lengths. Each section is independently connected through via holes to corresponding sections of the other wire, creating segmented parallel pathways. This segmentation ensures that if one section experiences disconnection, other sections maintain electrical connectivity, preventing complete signal failure and light line defects.
Solution Approach 2:
The patent implements redundant wiring structures where multiple parallel wire sections are prepared in advance. These redundant pathways act as cushioning against potential disconnections, ensuring that even if foreign matter causes a break in one wire section, the signal can still pass through alternative pathways, thereby cushioning against the harmful effect of disconnection.
2Ease of manufacture
If the first wire and second wire are made with the same materials and processes to reduce manufacturing complexity, then production costs are reduced, but the precision of wire formation may be affected by process variations
Solution Approach 1:
The patent specifies that the first wire and second wire are formed from the same metal layer material but applies different patterning parameters during fabrication. By adjusting patterning parameters such as etch conditions or deposition thickness for different wire sections, the design maintains manufacturing simplicity while achieving precise control over wire dimensions and electrical characteristics.
Data Source
AI summary
Provided are an array substrate and a manufacturing method thereof. A first wire of a fanout line of the array substrate is divided into a plurality of first sections. A second wire of the fanout line is divided into a plurality of second sections corresponding to the first sections. Each of the first sections is electrically connected to the second section corresponding thereof. Thus, as a certain position of the first wire or the second wire is broken, only a resistance of the first section or the second section where the broken position is located is changed, so that a blocking effect on the entire fanout lines is not large, thereby reducing or avoiding appearance of a light line.