Patterned Insulating Layer for Liquid Deposition Control
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Solution Overview
Problem
Existing electronic device manufacturing processes face challenges in controlling the spreading of deposited liquid compositions, particularly for high-resolution displays, leading to issues such as uneven diffusion and visual differences across the panel, which affect the efficiency and operating voltage of the device.
Innovation Solution
The process involves forming an electronic device with a patterned insulating layer that includes a plurality of openings, allowing a liquid composition to be deposited in a controlled manner within the radiation regions while preventing overflow into neighboring areas, thereby maintaining the integrity of the emission materials and reducing the need for additional containment structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a thicker receiving layer is used to control line width for high resolution, then manufacturing precision is improved, but device efficiency deteriorates and operating voltage increases
Solution Approach 1:
The receiving layer is segmented into multiple thinner layers rather than using a single thick layer. This segmentation allows for better control of liquid composition spreading while reducing the total thickness, thereby maintaining manufacturing precision without sacrificing device efficiency or increasing operating voltage excessively.
Solution Approach 2:
The patent introduces a temporal dimension by applying the receiving layer in multiple sequential steps rather than a single step. This multi-step process allows each thin layer to be optimized independently, achieving the desired line width control while keeping individual layer thicknesses low to maintain device performance.
2Manufacturing precision
If a thicker receiving layer is used to control line width for high resolution, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The receiving layer is divided into multiple thinner sub-layers, each with optimized thickness and composition. This segmentation provides better line width control while keeping each individual layer simple in structure, reducing the complexity of the overall receiving layer system compared to a single thick layer.
3Stability of the object's composition
If diffusion is extended to uniform concentration throughout layer thickness, then material uniformity is improved, but lateral diffusion increases causing low resolution
Solution Approach 1:
The receiving layer is designed with spatially varying properties - thinner regions near pixel boundaries to limit lateral diffusion and maintain resolution, and optimized thickness in central regions to achieve sufficient material uniformity. This local quality variation allows simultaneous achievement of both uniformity and high resolution.
Solution Approach 2:
The receiving layer is segmented into multiple thin layers, each contributing to gradual concentration uniformity while limiting the total diffusion path length. This prevents excessive lateral diffusion that would occur in a single thick layer, thereby maintaining pixel resolution while achieving acceptable material uniformity.
4Manufacturing precision
If receiving layer thickness is increased to reduce spreading, then liquid composition confinement is improved, but optical and electrical properties deteriorate
Solution Approach 1:
The receiving layer is segmented into multiple thin layers rather than one thick layer. This segmentation provides effective liquid composition confinement through the cumulative effect of multiple interfaces, while keeping each individual layer thin enough to minimize degradation of optical and electrical properties of emission materials.
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 the formation of high-resolution displays with smaller pixel sizes and improved uniformity, reducing the need for thicker receiving layers and minimizing visual differences across the panel, while maintaining efficient operation and extending the device's usable life.
Implementation Method 1
a receiving layer is use to rapidly increase the viscosity of a deposited liquid composition, and therefore, reduce the spreading of the liquid composition laterally
Implementation Method 2
The bank could be fluorinated to improve the confinement through an increased contact angle and reduced surface energy
Implementation Method 3
a receiving layer is use to rapidly increase the viscosity of a deposited liquid composition
Implementation Method 4
an insulating layer that includes a plurality of openings... allowing a liquid composition to be deposited in a controlled manner within the radiation regions while preventing overflow into neighboring areas
Data Source
AI summary
Processes for forming an electronic device include forming a first radiation region, a second radiation region spaced apart from the first radiation region, and an insulating region. The insulating region can have a first side and a second side opposite the first side. The first radiation region can lie immediately adjacent to the first side, and the second radiation region can lie immediately adjacent to the second side. Within the insulating region, no other radiation region may lie between the first and second radiation regions, and the insulating region can include an insulating layer that includes a plurality of openings. A process for forming the electronic device can include patterning an insulating layer.