TFT Array Substrate Lateral Data Line Routing
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Solution Overview
Problem
Conventional thin film transistor (TFT) array substrates face dielectric breakdown issues leading to short circuits between gate lines and data lines, disrupting signal transmission in liquid crystal displays.
Innovation Solution
The TFT array substrate design features data lines positioned on both sides of the gate lines without overlapping, with data transmission lines on the color filter substrate connecting these data lines across the gate lines, preventing dielectric breakdown and ensuring continuous signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If data lines are positioned directly over gate lines to simplify routing, then device complexity is reduced, but dielectric breakdown occurs causing short circuits between gate lines and data lines
Solution Approach 1:
The data lines are routed along both sides of the gate line in the same plane rather than directly over it, changing the spatial arrangement from vertical stacking to lateral routing. This dimensional reconfiguration eliminates the overlapping region that causes dielectric breakdown while maintaining routing efficiency
Solution Approach 2:
The gate line itself serves as an intermediary barrier that physically separates the two data lines running on its sides. This intermediate structure prevents direct contact between data lines and eliminates the need for additional insulation layers, resolving the short circuit problem while keeping the design simple
2Reliability
If data lines are separated from gate lines to prevent dielectric breakdown, then reliability is improved, but manufacturing precision requirements increase due to tighter spacing constraints
Solution Approach 1:
The gate line and data lines are merged into a single integrated routing structure where the gate line serves dual purposes: as an electrical conductor and as a physical barrier separating data lines. This merging eliminates the need for separate insulation structures and reduces manufacturing precision requirements
Solution Approach 2:
All conductive elements (gate lines and data lines) are formed using the same material layer and deposition process, creating homogeneous electrical structures. This homogeneity simplifies manufacturing by eliminating the need for precise alignment and spacing control between different material layers
Data Source
AI summary
Embodiments of the disclosed technology provide to a thin film transistor array substrate comprising a first base substrate; a gate line formed on the first base substrate; and two data lines separately formed on the first base substrate; wherein the two data lines are located on both sides of the gate line respectively in the direction of data signal transmission but do not overlap with the gate line. The two data lines can be electrically connected through conductive elements for transmitting data signals.