Display Panel Bridging Wire via Third Metal Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing display panel technology faces issues with poor contact between transition lines due to stepped angles formed on the inner sidewall of transition holes during the etching process, which affects the connection between vertical gate lines and fanout lines.
Innovation Solution
The display panel design includes multiple metal and insulating layers with strategically placed through holes and bridging wires made of indium tin oxide, allowing for stable connections between wires without the formation of stepped angles, thereby improving contact reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transition holes are formed by etching through two insulating layers to connect vertical gate lines and fanout lines, then the connection between wires is achieved, but stepped angles appear on the inner sidewall of the holes causing poor contact
Solution Approach 1:
The patent introduces a third metal layer with bridging wires that extend through the stepped region, adding a vertical dimension to the connection path. This allows the bridging wire to bridge across the stepped angle gap between the first and second metal layers, establishing reliable electrical contact despite the non-uniform hole wall geometry caused by etching through multiple insulating layers.
Solution Approach 2:
The bridging wire acts as an intermediary element between the first metal layer (vertical gate line) and the second metal layer (fanout line). It extends through the transition hole and makes contact with both layers, mediating the electrical connection across the stepped angle region where direct contact would be poor.
2Length of moving object
If three-layer metal circuit technology is used to achieve ultra-narrow bezel requirements, then the gate bezel and bottom bezel widths can meet 0.9mm specification, but the complexity of the circuit structure increases
Solution Approach 1:
The patent segments the gate driver circuit into three distinct metal layers with separate functional roles: first metal layer for vertical gate lines, second metal layer for fanout lines, and third metal layer for bridging connections. This segmentation allows each layer to be optimized for its specific function, enabling ultra-narrow bezel design while managing complexity through clear functional separation.
Solution Approach 2:
By utilizing three-layer metal circuit technology, the patent transitions from a planar two-layer circuit to a three-dimensional multi-layer structure. This allows the gate driver circuit to be folded into the vertical space of the non-display area, achieving the required ultra-narrow bezel width of 0.9mm by distributing circuit elements across multiple vertical layers rather than consuming horizontal space.
Data Source
AI summary
A display panel and a preparing method thereof are provided. The display panel has a second wire between a first insulating layer and a second insulating layer, so that a first wire and a bridging wire are connected through the second wire to avoid a stepped angle between the first insulating layer and the second insulating layer due to etching problems, thereby preventing the bridging wire from poor contact, so that the connection between the first wire and a third wire is more stable.