Coating Device Dryer Adjusts Force for Uniform Crystal Growth
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Solution Overview
Problem
Existing coating devices struggle to maintain a uniform crystal state of the coating film, leading to impaired functionality, particularly for materials used in perovskite solar cells.
Innovation Solution
A coating device with a dryer that adjusts its drying promotion force based on drying distribution information of the coating film, ensuring uniform drying across the substrate by strengthening drying in delayed regions and weakening it in advanced regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a separate drying device is used to dry the coating film uniformly, then the drying environment is uniform, but the crystal state of the coating film becomes uneven due to location-dependent variations
Solution Approach 1:
The patent applies local quality by dividing the drying process into spatial zones. The drying device includes multiple blowing units positioned at different locations (upstream, center, downstream) that can be independently controlled. Each blowing unit adjusts its drying promotion force according to the specific drying state of the coating film in its corresponding region, enabling localized drying control to achieve uniform crystal state across the entire coating film.
Solution Approach 2:
The patent implements dynamics by making the drying promotion force adjustable and adaptive. The control unit dynamically adjusts the operation of each blowing unit based on real-time drying state detection. This dynamic adjustment allows the system to respond to variations in drying progress across different regions, transforming a static uniform drying approach into a dynamic adaptive drying process that maintains uniformity.
2Device complexity
If drying promotion force is applied uniformly across the coating film, then the drying process is simple, but regions with different drying rates develop non-uniform dryness states
Solution Approach 1:
The patent applies segmentation by dividing the drying device into multiple independent blowing units positioned at different locations along the coating film width. Each blowing unit can be independently controlled to provide localized drying promotion force. This segmentation transforms a single uniform drying approach into multiple zone-specific drying operations, enabling precise control over dryness uniformity across different regions of the coating film.
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 solution effectively suppresses non-uniformity of the dryness state, allowing crystals to grow uniformly, thereby preventing the crystal state of the coating film from becoming uneven.
Implementation Method 1
a dryer configured to dry the coating film on the substrate... the drying promotion force of the dryer, that is, the output for drying, is adjusted on the basis of this drying distribution information
Data Source
AI summary
A coating device comprises a stage, a coater and a dryer. A substrate is configured to be placed on the stage. The coater is configured to eject a coating liquid from a nozzle to form a coating film on the substrate that is placed on the stage while moving relative to the substrate. The dryer is configured to dry the coating film on the substrate. Drying promotion force of the dryer for promoting drying is adjusted on the basis of drying distribution information of the coating film on the substrate in accordance with a region of the coating film.