Quantum Dot Layer Patterning via Lyophobic Surface Treatment
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Solution Overview
Problem
Current methods for patterning quantum dot layers in display technology face challenges such as limited precision in printing processes and sensitivity of quantum dots to acidic or alkaline solutions in photolithography, leading to reduced quality of quantum dot color filters.
Innovation Solution
A manufacturing method involving lyophilic and lyophobic treatments on transparent layers to form quantum dot sublayers without the need for photolithography, using CFx or O2/N2 plasma and alcohol ether solvents to precision-place quantum dots, ensuring high-resolution patterning and protecting quantum dots from solvent quenching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If photolithography is used to pattern quantum dot layers, then manufacturing precision can be improved, but quantum dot luminescence is quenched due to exposure to acidic or alkaline solutions
Solution Approach 1:
The patent extracts and eliminates the harmful photolithography process step from the quantum dot manufacturing sequence. By replacing acid/alkali-based patterning with a lyophobic treatment method, the harmful chemical exposure is completely removed while maintaining patterning capability through surface energy modification alone.
Solution Approach 2:
The patent changes the fundamental parameter of surface wettability through lyophobic treatment. By modifying the surface energy characteristics of the transparent layer to be lyophobic, the quantum dot solution is directed to specific regions without requiring acidic or alkaline chemicals, thus preserving luminescence while achieving precise patterning.
2Ease of manufacture
If conventional quantum dot manufacturing processes are used, then ease of manufacture is maintained, but manufacturing precision is insufficient for high-resolution displays
Solution Approach 1:
The patent changes the surface energy parameter of the transparent layer through lyophobic treatment, creating regions that repel the quantum dot solution. This simple parameter modification enables precise patterning without complex photolithography equipment or multiple processing steps, maintaining ease of manufacture while significantly improving precision.
Solution Approach 2:
The patent replaces the mechanical/optical photolithography system with a chemical surface modification system. Instead of using light exposure and photoresist development, the method uses lyophobic surface treatment to directly guide quantum dot deposition, simplifying the manufacturing process while achieving high-resolution patterning.
3Manufacturing precision
If photolithography is used for patterning, then manufacturing precision can be improved, but device complexity increases due to additional process steps and sensitivity requirements
Solution Approach 1:
The patent extracts and removes the complex photolithography subsystem from the manufacturing process. By eliminating the need for photoresist coating, light exposure equipment, and chemical development steps, the overall process complexity is reduced while maintaining patterning precision through the simpler lyophobic treatment method.
Solution Approach 2:
Instead of using attractive forces (photoresist adhesion) to define patterns, the patent uses repulsive forces (lyophobic surface treatment) to achieve the same goal. This inverted approach simplifies the process by eliminating the need for subsequent removal steps and reduces sensitivity to process variations.
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 method enhances the quality of quantum dot color filters by improving patterning precision and preventing luminescence quenching, resulting in improved color gamut and display performance.
Implementation Method 1
The lyophobic treatment is performed using CFx plasma
Implementation Method 2
the lyophilic treatment is performed using O2 plasma or N2 plasma
Data Source
AI summary
The present disclosure relates to a manufacturing method of a quantum dot layer, a quantum dot color filter, a color filter substrate, a display panel, and a display device. The manufacturing method includes: performing lyophobic treatment on a first specified region of a first transparent layer, the first transparent layer including regions corresponding to a plurality of pixel regions, each pixel region of the plurality of pixel regions comprising a first subpixel region and a region other than the first subpixel region, the first specified region corresponding to the region other than the first subpixel region; and preparing a lyophilic first quantum dot solution on the first transparent layer to form a first quantum dot sublayer in a region that corresponds to the first subpixel region and is not subjected to the lyophobic.