Integrated Optical Axis Repair for Flat Panel Displays
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Solution Overview
Problem
Current methods for repairing microelectronic circuits, particularly in flat panel displays, face challenges such as slow deposition rates, contamination risks, and high complexity in achieving precise and uniform deposition of materials for defects like open lines, which limits production efficiency and increases costs.
Innovation Solution
An integrated apparatus that combines review, material removal, and material deposition functions along the same optical axis, using a camera, lenses, and lasers to focus on defects for removal and deposit rheological compounds from a ribbon to the substrate, enabling precise and efficient repair of defects like open lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional material deposition methods are used to repair open lines in TFT arrays, then material can be deposited to bridge defects, but the deposition rate is slow and the process is complex
Solution Approach 1:
The patent combines multiple functions (review, material removal, and material deposition) into a single integrated apparatus that operates along the same optical axis. This merging of functions eliminates the need for separate inspection and repair tools, thereby reducing overall system complexity while maintaining high deposition rates through specialized rheological compound delivery mechanisms.
Solution Approach 2:
The apparatus is designed with multi-functionality, capable of performing defect review, laser ablation for material removal, and rheological compound deposition all through a single optical system. This universal design allows one apparatus to replace multiple specialized tools, improving productivity without proportionally increasing complexity.
2Productivity
If separate review and repair tools are used, then each function can be optimized independently, but production time increases and efficiency decreases
Solution Approach 1:
By merging review and repair functions into a single apparatus operating along the same optical axis, the system eliminates the time required to transfer substrates between separate tools. The integrated design allows immediate repair action following defect identification, significantly reducing production time and improving overall efficiency.
Solution Approach 2:
The apparatus enables continuous operation by maintaining the substrate in position while performing both review and repair functions sequentially without interruption. The rheological compound deposition system is designed to operate continuously along the optical path, eliminating idle time between inspection and repair operations.
3Manufacturing precision
If traditional deposition methods are used, then material can be applied to defects, but uniformity and precision of deposition are difficult to achieve
Solution Approach 1:
The system employs local quality by directing rheological compound precisely to the defect location through focused laser activation along the optical axis. The material properties and delivery mechanism are tailored to achieve uniform deposition only where needed, rather than applying material broadly, thereby improving precision without requiring overly complex system architecture.
Solution Approach 2:
The patent utilizes parameter changes in the rheological compound itself, which changes state or properties under laser activation to enable controlled deposition. This material-based parameter change allows precise deposition control without adding complex mechanical or control system elements.
4Reliability
If multiple inspection and repair stages are implemented, then defect detection and repair capability are enhanced, but the overall process becomes more complex and costly
Solution Approach 1:
The apparatus achieves enhanced defect repair capability through multi-functionality, combining review, material removal, and deposition functions in one system. This universal design provides comprehensive repair capability without the complexity of coordinating multiple separate tools and processes.
Solution Approach 2:
By merging all necessary repair functions into a single apparatus operating along one optical axis, the system achieves high reliability in defect repair while minimizing system complexity. The integrated design ensures that all repair capabilities work together in a coordinated manner without the interface complexities of multiple separate systems.
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 allows for rapid, precise, and uniform deposition of materials, reducing production time and costs by integrating review and repair functions in a single tool, enhancing the efficiency of defect repair in flat panel displays.
Implementation Method 1
a first lens is also used to focus the laser beam on the structure to remove material present thereon
Implementation Method 2
a second lens is used to focus the laser beam on a ribbon to transfer a rheological compound from a recessed well formed in the ribbon to the structure
Data Source
AI summary
An apparatus includes integrated review, material removal and material deposition functions. The apparatus performs the review, material removal and material deposition operations along the same optical axis. The apparatus includes, in part, a camera, a pair of lenses, and one or more lasers. A first lens is used to focus the camera along the optical axis on a structure formed on the target substrate undergoing review. The first lens is also used to focus the laser beam on the structure to remove a material present thereon if the reviewed structure is identified as requiring material removal. The second lens is used to focus the laser beam on a ribbon to transfer a rheological compound from a recessed well formed in the ribbon to the structure if the reviewed structure is identified as requiring material deposition.