Squeegee Geometry for Stable Liquid Film Thickness
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Solution Overview
Problem
Conventional flux transfer devices experience instability in flux film thickness due to the reaction force from the flux acting on the squeegee, causing the squeegee to float or incline.
Innovation Solution
The liquid transfer device incorporates a squeegee with a side surface that has an upward inclination or is perpendicular to the transfer table's bottom surface, preventing the squeegee from floating or inclining and maintaining stable flux film thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the squeegee relatively moves along the bottom surface of the transfer table to form a liquid film, then the liquid film is formed on the transfer target, but the squeegee floats or inclines due to reaction force from the liquid, making the film thickness unstable
Solution Approach 1:
The squeegee side surface on the traveling direction side is designed with an upward inclination rather than being vertical, creating an asymmetric geometry that prevents the squeegee from floating or inclining when liquid passes underneath. This asymmetric shape ensures stable contact between the squeegee and transfer table, maintaining consistent film thickness during operation.
2Device complexity
If the squeegee side surface is vertical to the bottom surface, then the structure is simple, but the squeegee floats or inclines due to reaction force from the liquid
Solution Approach 1:
The squeegee side surface on the traveling direction side is designed with an upward inclination rather than being vertical, creating an asymmetric geometry that prevents the squeegee from floating or inclining when liquid passes underneath. This asymmetric shape ensures stable contact between the squeegee and transfer table, maintaining consistent film thickness during operation.
Data Source
AI summary
A liquid transfer device includes a transfer table, a squeegee, and a squeegee holding mechanism. The transfer table has a bottom surface on which a liquid film is formed and transfers a liquid to a transfer target by immersing the transfer target in the liquid film. The squeegee is disposed above the transfer table and pushes and spreads the liquid on the transfer table by relatively moving along the bottom surface of the transfer table to form the liquid film. The squeegee has a side surface on a traveling direction side in contact with the liquid when the squeegee relatively moves along the bottom surface of the transfer table. The side surface of the squeegee has an upward inclination or is perpendicular to the bottom surface of the transfer table. The squeegee holding mechanism holds the squeegee to be movable in a vertical direction.