Single Mask Film Patterning for LED Substrates
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Solution Overview
Problem
Current methods for patterning materials over substrates in LED devices are inefficient, causing damage to underlying layers, high particulate contamination, limited scalability, and increased manufacturing costs, particularly due to the use of expensive and complex shadow-masks and thermal expansion issues.
Innovation Solution
A method involving a single mask film over a substrate, where opening portions are formed in specific locations to deposit different electrical materials, allowing for multiple layers to be patterned without the need for frequent mask changes, reducing damage and contamination, and enabling large-scale production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If shadow-masks are used for patterning materials, then material deposition can be achieved, but manufacturing costs increase and device complexity increases
Solution Approach 1:
The patent extracts and removes the shadow-mask component entirely from the patterning system. Instead of using physical masks to define patterns, the invention employs direct vapor deposition techniques where materials are deposited only in desired locations through controlled deposition processes, eliminating the need for mask fabrication, alignment, and maintenance infrastructure.
Solution Approach 2:
The patent replaces the mechanical shadow-mask system with a vapor-phase deposition system. Rather than using physical barriers (masks) to control material placement, the invention uses controlled vapor deposition where materials are transported in vapor form and condensed directly onto the substrate in patterned areas, substituting mechanical masking with a vapor-based patterning approach.
2Manufacturing precision
If shadow-masks are used for patterning, then material deposition is possible, but thermal expansion reduces deposition precision
Solution Approach 1:
The patent removes the shadow-mask component that suffers from thermal expansion issues. By eliminating the physical mask entirely and using direct vapor deposition, the system avoids the thermal expansion problems inherent in mask-based systems, maintaining deposition precision without requiring thermal compensation mechanisms.
3Object-affected harmful factors
If shadow-masks are used for patterning, then material deposition can occur, but particulate contamination increases
Solution Approach 1:
The patent extracts and eliminates the shadow-mask component that generates particulate contamination. By removing the physical mask and its associated handling, cleaning, and replacement processes, the system eliminates the primary source of particulate contamination, resulting in cleaner deposition environments and reduced maintenance requirements.
4Object-affected harmful factors
If shadow-masks are used for patterning, then material deposition is achieved, but alignment damage occurs to underlying layers
Solution Approach 1:
The patent removes the shadow-mask alignment process that causes substrate damage. By eliminating the need for mask alignment and the physical contact between masks and substrates, the system avoids damage to underlying deposited layers while maintaining the ability to create precise patterns through controlled vapor deposition.
5Productivity
If multiple masks are used for patterning different layers, then complete patterning is achieved, but productivity decreases
Solution Approach 1:
The patent combines multiple patterning operations into a single integrated vapor deposition process. Instead of sequentially applying multiple masks for different layers and patterns, the invention uses controlled vapor deposition to deposit multiple materials in their respective patterned locations simultaneously or in rapid succession, merging what would be separate mask-based operations into one efficient process.
Solution Approach 2:
The patent maintains continuous deposition action without the interruptions required by mask changes. The vapor deposition system can continuously deposit materials in patterned areas without stopping to replace or realign masks, ensuring continuous productive operation and eliminating downtime associated with mask management.
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 improves resolution and efficiency, reduces damage to underlying layers, minimizes particulate contamination, and lowers manufacturing costs while scaling to larger substrates, enhancing the overall patterning process for LED devices.
Implementation Method 1
deposited thereupon is a mask film... First electrical materials are deposited over the substrate and mask film
Data Source
AI summary
A method of patterning a substrate that includes locating a single mask film over the substrate and forming first opening portions in first locations in the mask film. First electrical materials are deposited over the substrate and mask film to form patterned areas in the first locations. Second opening portions are formed in second locations different from the first locations in the mask film. Subsequently, second electrical materials are deposited over the substrate and mask film to form patterned areas in the first and second locations.