Nozzle Surface Modification for LCD Dispensing Accuracy
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Solution Overview
Problem
The process of injecting liquid crystal between substrates in liquid crystal display manufacturing is inefficient due to the narrow space, making it difficult to apply to large-area panels and resulting in a high defective rate.
Innovation Solution
A method of modifying the nozzle surface of a liquid dispenser by oxygen or ozone plasma treatment, followed by aminopropyltriethoxysilane treatment, and then reacting with an epoxy resin to form a 10 nm thick epoxy resin layer, reducing liquid aggregation and improving dispensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If liquid crystal is injected between substrates using conventional methods, then the injection process can be completed, but the process takes a long time and is difficult to apply to large-area panels due to narrow space constraints
Solution Approach 1:
The patent replaces conventional mechanical injection methods with a dispenser system that uses controlled liquid ejection through nozzles. This substitution allows for more precise and faster liquid crystal application, particularly on large-area panels where traditional mechanical injection becomes inefficient due to space constraints and narrow gaps between substrates.
2Manufacturing precision
If conventional nozzle surfaces are used without modification, then the dispenser can operate, but liquid aggregates on the nozzle surface causing dispensing inaccuracies and high defective rates
Solution Approach 1:
The patent modifies the nozzle surface parameters by forming an epoxy resin coating layer with specific thickness (1-10 μm) and surface properties. This parameter change in the nozzle surface composition and structure prevents liquid crystal aggregation, ensuring accurate dispensing and reducing defects in liquid crystal display manufacturing.
Solution Approach 2:
The patent creates a composite nozzle surface by combining the base nozzle material with an epoxy resin coating layer. This composite structure integrates the mechanical strength of the original nozzle with the liquid-repelling properties of the epoxy resin, achieving both structural integrity and improved dispensing performance.
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
The modified nozzle surface prevents liquid aggregation, enabling the formation of a uniform liquid crystal layer with reduced defective rates in liquid crystal display manufacturing, allowing for precise and efficient liquid crystal dispensing.
Implementation Method 1
performing one of oxygen (O2) or ozone (O3) plasma treatment with respect to the surface of the nozzle
Implementation Method 2
secondarily modifying the primarily modified surface of the nozzle by treating the primarily modified surface with aminopropyltriethoxysilane
Implementation Method 3
tertiary modifying the secondarily modified surface of the nozzle by allowing an epoxy resin to react with the secondarily modified surface of the nozzle
Data Source
AI summary
A method of modifying a surface of the nozzle of a liquid dispenser used to dispense liquid for manufacturing a liquid crystal display (LCD) includes primarily modifying the surface of the nozzle by performing one of oxygen (O2) or ozone (O3) plasma treatment with respect to the surface of the nozzle, secondarily modifying the primarily modified surface of the nozzle by treating the primarily modified surface with aminopropyltriethoxysilane, and tertiary modifying the secondarily modified surface of the nozzle by allowing an epoxy resin to react with the secondarily modified surface of the nozzle.