Nozzle Clogging Detection via Thermal Imaging in Deposition Apparatus
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Solution Overview
Problem
In the context of organic light emitting display device manufacturing, existing deposition methods face challenges in efficiently detecting and addressing nozzle clogging, which can lead to reduced deposition material quality and increased pressure in the deposition source due to unnecessary temperature control.
Innovation Solution
A deposition apparatus equipped with a nozzle inspection unit that uses a thermal imaging camera to measure and analyze the temperature of nozzles, determining clogging by comparing the measured temperature with a reference temperature, and a laser-based system to remove clogging by selectively irradiating energy to clogged nozzles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature control is continuously applied to the deposition source, then deposition material quality is maintained, but pressure increases and energy is wasted when nozzles are clogged
Solution Approach 1:
The system performs preliminary inspection of nozzle status using thermal imaging before deposition begins. By detecting temperature anomalies that indicate clogging in advance, the system can prevent unnecessary temperature control and energy consumption during the deposition process while maintaining material quality when nozzles are functional.
Solution Approach 2:
The thermal imaging camera provides continuous feedback on nozzle temperature status. This feedback mechanism allows the system to monitor nozzle health in real-time and adjust temperature control accordingly, reducing energy waste when clogging is detected while maintaining deposition quality when nozzles are clear.
2Measurement precision
If thermal imaging camera is used to inspect nozzles, then clogging detection accuracy is improved, but device complexity increases
Solution Approach 1:
The thermal imaging camera serves as an intermediary inspection device that non-invasively detects nozzle temperature variations. This mediator approach allows accurate clogging detection without direct contact or complex disassembly of the deposition source, maintaining measurement precision while adding minimal structural complexity.
3Productivity
If laser is used to remove clogging, then productivity is improved, but device complexity increases
Solution Approach 1:
The laser-based cleaning system replaces traditional mechanical cleaning methods with optical energy. This substitution eliminates the need for complex mechanical disassembly, tools, and manual intervention, thereby improving productivity while the integrated laser module keeps the added complexity manageable.
4Reliability
If continuous monitoring of all nozzles is performed, then reliability is improved, but loss of time increases
Solution Approach 1:
The thermal imaging system captures temperature data from all nozzles simultaneously in a single snapshot, performing partial inspection of the entire nozzle array at once. This approach achieves comprehensive monitoring reliability without the time loss associated with sequential individual nozzle inspection, as the thermal camera captures all temperatures in parallel.
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
This solution allows for efficient detection and removal of nozzle clogging, preventing denaturation of deposition materials and pressure increases, thereby enhancing the quality and reliability of the deposition process.
Implementation Method 1
a temperature measurement unit for measuring a temperature of the nozzle
Implementation Method 2
removing nozzle clogging of the nozzle when it is determined that the nozzle is clogged... a laser beam is irradiated to the nozzle using a laser
Data Source
AI summary
A method for inspecting a nozzle includes: measuring a temperature of the nozzle; comparing the temperature of the nozzle with a reference temperature; and determining whether or not the nozzle is clogged based on the temperature of the nozzle.