Silicon-Oxygen Patterning Coating for OLED Conductive Layers
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Solution Overview
Problem
Current methods for patterning conductive coatings in OLED devices are inefficient due to high evaporation temperatures of materials used, leading to increased costs and complexity, and often result in debris that affects manufacturing yield, particularly when dealing with complex topographical features.
Innovation Solution
A layered semiconductor device with a silicon-oxygen backbone and a fluorine-containing moiety is used as a patterning coating, which inhibits nucleation and has a low initial sticking probability for deposited materials, allowing for selective and efficient deposition of conductive coatings without the need for fine metal masks or laser drilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fine metal mask (FMM) is used during deposition, then patterning accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and removes the FMM from the deposition process entirely. Instead of using a physical mask, the invention employs a nucleation-inhibiting coating layer that prevents material deposition in specific areas through chemical surface properties. This eliminates the complex mask alignment, positioning, and handling procedures while achieving the same patterning function.
Solution Approach 2:
The patent introduces a nucleation-inhibiting coating layer as an intermediary between the substrate and the deposited material. This intermediate layer controls where material can and cannot deposit by modifying surface energy and nucleation properties, replacing the need for physical masking while maintaining precise patterning control.
2Manufacturing precision
If laser drilling is used to remove unwanted regions, then patterning is achieved, but manufacturing yield decreases due to debris
Solution Approach 1:
Instead of depositing material everywhere and then removing unwanted portions (subtractive approach), the invention inverts the process by preventing material deposition only where needed through the nucleation-inhibiting coating. This additive approach eliminates the need for laser drilling and associated debris generation, directly improving manufacturing yield.
3Quantity of substance
If high evaporation temperature materials are used, then conductive coating deposition is achieved, but reusability of FMM decreases
Solution Approach 1:
The patent removes the FMM from the high-temperature deposition process entirely. The nucleation-inhibiting coating remains on the substrate and is not affected by deposition temperature, allowing high-temperature material deposition without compromising mask integrity or reusability.
4Quantity of substance
If conventional deposition methods are used, then conductive coating is formed, but adaptability to complex topographies is poor
Solution Approach 1:
The nucleation-inhibiting coating provides locally differentiated surface properties across the substrate. Areas without the coating allow normal deposition, while areas with the coating inhibit nucleation. This local control mechanism works effectively on complex topographies where uniform deposition conditions cannot be maintained throughout.
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 enables precise and cost-effective patterning of conductive coatings, reducing debris and improving manufacturing yield by controlling the deposition of materials like silver and magnesium, while being suitable for complex topographies.
Implementation Method 1
a patterning coating, which may act as and/or be a nucleation-inhibiting coating (NIC)... depositing the electrode material and thereafter removing, including by a laser drilling process, unwanted regions thereof to form the pattern. However, the removal process often involves the creation and/or presence of debris
Implementation Method 2
Various layers and coatings of such panels are typically formed by vacuum-based deposition processes
Data Source
AI summary
A layered semiconductor device comprising a compound, the compound comprising a silicon-oxygen backbone and at least one fluorine-containing moiety attached to the silicon-oxygen backbone. The compound may comprise a unit represented by: formula (I) wherein R and R′ each independently represents at least one of: substituted or unsubstituted alkyl, substituted or unsubstituted fluoroalkyl, substituted or unsubstituted alkoxy, substituted or unsubstituted fluoroalkoxy, substituted or unsubstituted siloxy, or substituted or unsubstituted fluoroalkylsiloxy, substituted or unsubstituted cycloalkyl, substituted or unsubstituted fluorocycloalkyl, substituted or unsubstituted aryl, substituted or unsubstituted fluoroaryl, or substituted or unsubstituted heteroaryl; and wherein at least one of R and R′ is the fluorine-containing moiety.