Heating Wire Abnormality Detection in Substrate Treatment
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Solution Overview
Problem
The repetition of heating and cooling in heating wires used in substrate treatment processes leads to uncertainty in temperature control due to changes in the characteristics of the metallic materials, affecting the precision of substrate processing in semiconductor manufacturing.
Innovation Solution
A substrate treating apparatus and method that includes a housing with a heating unit, a main temperature sensor to measure the plate temperature, an auxiliary temperature sensor to measure the heating wire temperature, and an abnormality detection unit to identify issues such as deformation, poor insulation, or noise in the heating wire by analyzing temperature change characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heating wire is used for heating substrate, then heating function is achieved, but temperature control precision deteriorates due to characteristic changes from repeated heating and cooling
Solution Approach 1:
The patent applies preliminary action by detecting abnormalities in the heating wire before they cause significant temperature control issues. The system continuously monitors the heating wire's resistance and temperature, and compares these values against predetermined thresholds to predict potential failures before they occur, allowing for preventive maintenance rather than reactive repairs.
2Reliability
If abnormality detection system is added, then temperature control reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a detection system that serves multiple functions: it monitors heating wire temperature, measures resistance changes, detects abnormalities, and provides predictive maintenance capabilities. This multi-functional approach consolidates what could be multiple separate systems into a unified detection mechanism, reducing overall system complexity while maintaining high reliability.
Solution Approach 2:
The system implements feedback by continuously monitoring heating wire parameters and using this information to detect abnormalities. The control unit receives real-time data from temperature and resistance sensors, compares it against expected values, and triggers alerts or adjustments when deviations are detected, creating a closed-loop system that improves reliability without requiring overly complex open-loop monitoring.
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 precise detection and prediction of heating wire abnormalities, improving temperature control and preventing failures in substrate treatment processes.
Implementation Method 1
a heating unit having a heating wire that is provided inside the plate and that heats the substrate
Implementation Method 2
a main temperature sensor that directly measures temperatures of the plate
Data Source
AI summary
An apparatus for treating a substrate includes a housing having a treatment space therein, a plate that supports the substrate in the housing, a heating unit having a heating wire that is provided inside the plate and that heats the substrate, a main temperature sensor that directly measures temperatures of the plate, and an auxiliary temperature sensor that measures temperatures of the heating wire.