Flat Display Panel Bridge Line Repair for Short Defects
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Solution Overview
Problem
Conventional methods for repairing conductive lines in flat display panels often result in operation and performance issues due to the use of rescue lines, which can cause new defects and inefficiencies, especially in high-resolution designs like LCDs with 2D1G and 2G1D structures.
Innovation Solution
The implementation of bridge lines between adjacent common electrode lines allows for direct cutting and rerouting of common voltage, eliminating the need for additional rescue lines and minimizing the risk of new defects during the repair of short defects in conductive lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rescue lines are used to repair short defects in conductive lines, then the short defect can be repaired, but new H-line or cross-short problems occur and operation efficiency deteriorates
Solution Approach 1:
The patent extracts the harmful rescue line structure from the repair process and replaces it with a direct cutting method. Instead of adding rescue lines that cause new defects, the invention directly cuts the conductive line at the short defect location and uses bridge lines (pre-existing structures) to restore connectivity, thereby eliminating the source of new H-line or cross-short problems
Solution Approach 2:
The bridge lines serve as intermediary structures that facilitate the repair process. These pre-existing bridge lines connect adjacent common electrode lines and enable signal routing without requiring additional rescue lines, thus avoiding the creation of new defects while maintaining repair effectiveness
2Reliability
If laser blade is used to cut off data lines with short defect, then the short defect can be removed, but new H-line or cross-short problems occur due to bad energy control
Solution Approach 1:
The patent changes the energy control parameters of the laser blade during the cutting process. By precisely adjusting energy levels and cutting conditions, the invention achieves complete removal of short defects without causing excessive heat that would melt and connect adjacent conductive lines, thereby eliminating H-line or cross-short problems
3Reliability
If rescue lines are used to transfer signals, then short defects can be repaired, but operation efficiency is reduced due to additional conducting paths
Solution Approach 1:
The invention extracts and eliminates the unnecessary rescue line structure from the signal transmission path. By using direct cutting and bridge lines, the patent restores the original efficient signal routing without additional conducting paths, thereby maintaining high operation efficiency while achieving reliable defect repair
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 approach enhances the operational performance and efficiency of flat display panels by allowing for effective repair of conductive lines without introducing additional defects, thereby improving fabrication yield and panel performance.
Implementation Method 1
using a laser blade to cut off the parts of conductive lines with the short defect
Data Source
AI summary
A flat display panel includes a bridge line disposed between adjacent common lines. When a short defect occurs, the common line near the short defect can be directly cut off in order to repair the short defect and the common voltage can be transferred through the bridge line to maintain the normal operation of the flat display panel.