Display Panel Repair Using Dual-Pulse Laser Layer Removal
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Solution Overview
Problem
Existing methods for repairing display panels are inadequate in efficiently addressing defects in multilayer patterns, particularly in removing specific layers such as aluminum and titanium without damaging adjacent layers.
Innovation Solution
A method utilizing different lasers with varying pulse widths to selectively remove defective layers from a display panel. A first laser with a shorter pulse width and higher peak power is used to remove the second layer, while a second laser with a longer pulse width and lower peak power is used to remove the first layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single laser is used to remove defective layers, then the repair process is simple, but it cannot selectively remove specific layers without damaging adjacent layers
Solution Approach 1:
The patent divides the laser removal process into multiple stages, each targeting a specific layer. The first laser (femtosecond laser) removes the second layer (titanium), and the second laser (nanosecond laser) removes the first layer (aluminum). This segmentation allows precise control over which layer is removed at each stage, solving the contradiction between selective precision and process simplicity.
Solution Approach 2:
The patent changes key laser parameters (pulse width and peak power) to achieve selective layer removal. The first laser uses a short pulse width (femtosecond range) and high peak power to remove the titanium layer, while the second laser uses a longer pulse width (nanosecond range) and lower peak power to remove the aluminum layer. This parameter differentiation enables precise control over material removal selectivity.
2Manufacturing precision
If a laser with high peak power and short pulse width is used, then the second layer (titanium) can be removed effectively, but the first layer (aluminum) may be damaged
Solution Approach 1:
The patent applies preliminary action by first removing the second layer (titanium) using the femtosecond laser before attempting to remove the first layer (aluminum). This preliminary removal of the titanium layer prevents the high peak power laser from directly interacting with and damaging the aluminum layer, thus protecting the first layer while effectively removing the defective second layer.
Solution Approach 2:
The patent changes laser parameters between stages: the first laser uses high peak power and short pulse width (femtosecond) optimized for titanium removal, while the second laser uses lower peak power and longer pulse width (nanosecond) optimized for aluminum removal. This parameter adaptation prevents damage to the first layer while maintaining effectiveness for each layer's specific material properties.
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 effectively repairs defects in multilayer patterns by precisely removing the defective layers without causing damage to adjacent layers, thereby restoring the display panel's functionality.
Implementation Method 1
irradiating a first laser having a first pulse width to a defect area where the defect occurs
Implementation Method 2
irradiating a second laser having a second pulse width different from the first pulse width to the defect area
Data Source
AI summary
A method of repairing a display panel includes inspecting a defect of a first pattern of the display panel, irradiating a first laser having a first pulse width to a defect area where the defect occurs, and irradiating a second laser having a second pulse width different from the first pulse width to the defect area.