Inkjet Droplet Reference Samples for Consistent Fall Paths
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Solution Overview
Problem
The reliability of thin films formed by inkjet printing is compromised due to inconsistent discharge and fall direction of droplets, affecting process quality.
Innovation Solution
A method and apparatus for manufacturing a reference sample by capturing and analyzing droplet images at multiple time points during its fall, marking points on a substrate based on the droplet path, and comparing with a reference sample to measure droplet characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inkjet printing is used to form thin films, then productivity is improved, but manufacturing precision deteriorates due to inconsistent droplet discharge and fall direction
Solution Approach 1:
The patent creates a reference sample beforehand that contains marking points representing the ideal droplet falling path. This preliminary action establishes a standard against which actual droplet discharge can be measured and compared, enabling precision control while maintaining high-speed inkjet printing production
Solution Approach 2:
The patent replaces direct mechanical measurement of droplet characteristics with an optical measurement system. By using light transmission through the droplet and imaging to capture its position and shape, the system achieves precise measurement without mechanical interference, maintaining both productivity and precision
2Measurement precision
If multiple captured images are obtained by sequentially irradiating light, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The patent uses multiple light irradiations and captured images, but not continuously - only at specific time points during droplet fall. This partial action approach provides sufficient measurement precision by capturing key positions along the falling path without excessive energy consumption from continuous illumination
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
Enhances the precision and reliability of droplet measurement, ensuring consistent thin film formation by accurately measuring and controlling droplet discharge and fall characteristics.
Implementation Method 1
obtaining a droplet capture image by receiving the light irradiated from a light source and passed through the droplet falling toward the substrate
Data Source
AI summary
A method of manufacturing a reference sample includes discharging a droplet, obtaining a plurality of captured images by capturing the droplet according to a predetermined period with respect to an imaginary plane defined on a falling path of a discharged droplet, analyzing the plurality of captured images, and marking a point corresponding to the falling path of the droplet on a sample substrate based on a result of analyzing the plurality of captured images.