Coating Apparatus Orthogonal Nozzle Motion Arbitrary Angles
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Solution Overview
Problem
Existing coating technologies face challenges in applying polarizing films and wavelength plates at arbitrary angles due to limitations in film thickness reduction and inefficient coating processes, leading to issues with coating direction control and shear stress application.
Innovation Solution
A coating processing apparatus with a substrate holder and a coating nozzle that moves orthogonally to apply a coating liquid containing optical materials, allowing for free control of the coating direction and shear stress, thereby enabling efficient application at arbitrary angles without adhering to the substrate holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a stretched film is used to produce polarizing plate or wavelength plate, then the film can be formed with oriented molecules, but the film thickness cannot be reduced sufficiently
Solution Approach 1:
The invention changes the fundamental parameter of film formation from stretching a pre-formed film to depositing a coating liquid that self-organizes into liquid crystal phases. This parameter change enables simultaneous achievement of molecular orientation and thin film thickness, as the coating liquid forms oriented structures during the phase transition process rather than requiring mechanical stretching of a thicker film.
Solution Approach 2:
The invention utilizes phase transitions of liquid crystal materials during coating liquid drying. As the coating liquid evaporates and undergoes phase transition from liquid to liquid crystal phase, the molecules automatically orient themselves in specific directions, achieving molecular orientation without mechanical stretching and enabling thin film formation.
2Adaptability or versatility
If the substrate is inclined or rotated during coating to achieve arbitrary angle, then the coating direction can be controlled, but the coating liquid adheres to the substrate holder requiring frequent cleaning
Solution Approach 1:
The invention introduces dynamic control of the substrate holder, enabling it to rotate and incline during the coating process. This dynamic adjustment allows the coating direction to be changed without stopping the process, and the substrate holder can be automatically positioned to prevent coating liquid adhesion, eliminating the need for frequent cleaning operations.
Solution Approach 2:
The invention performs preliminary positioning of the substrate holder at specific angles and orientations before coating liquid application. By pre-configuring the substrate holder orientation, the coating liquid is directed precisely where needed, preventing unwanted adhesion to the holder and eliminating subsequent cleaning requirements.
3Ease of operation
If conventional coating apparatus is used, then the coating process is simple, but the coating direction cannot be freely controlled for arbitrary angle application
Solution Approach 1:
The invention integrates multiple functions into the coating apparatus, including substrate holder rotation, inclination adjustment, and coordinated movement with the coating head. This multi-functional design enables the apparatus to handle both simple and complex coating requirements, providing arbitrary angle control while maintaining operational simplicity through automated coordination of these functions.
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
Enables efficient and precise application of coating liquids at arbitrary angles, reducing the need for frequent cleaning and allowing for sufficient shear stress, resulting in improved film formation and reduced operational time.
Implementation Method 1
when the coating liquid is made to flow while applying shear stress, the major axis direction of the supramolecular associated product is oriented to the flowing direction
Implementation Method 2
a coating liquid having liquid crystal property is applied to a substrate as a predetermined material, and the coating liquid is cast and oriented
Data Source
AI summary
A coating processing apparatus that applies a coating liquid containing an optical material includes a substrate holder that holds a substrate, a coating nozzle that ejects the coating liquid to the substrate held by the substrate holder, and a moving mechanism that relatively moves the substrate holder and the coating nozzle in an orthogonal direction.