Eccentricity Correction Unit Monitoring for Substrate Treatment
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Solution Overview
Problem
In semiconductor device manufacturing, substrate misalignment during treatment processes leads to non-uniform liquid or plasma application, resulting in decreased yield and performance degradation, as existing monitoring methods fail to predict and correct eccentricity issues effectively.
Innovation Solution
A method and apparatus for continuously monitoring the performance of an eccentricity correction unit, which measures and corrects substrate eccentricity, stores correction data, and uses a control unit to predict performance degradation and interlock the substrate treatment apparatus when misalignment exceeds preset limits, ensuring accurate and uniform treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If substrate eccentricity correction is performed using existing methods, then substrate positioning is improved, but performance degradation cannot be predicted and yield loss occurs
Solution Approach 1:
The patent implements a feedback mechanism by continuously monitoring the amount of eccentricity correction applied to the substrate and using this data to predict future performance degradation. The control unit stores correction amounts and compares them against reference values to detect trends indicating upcoming failures, enabling proactive maintenance before yield loss occurs.
Solution Approach 2:
The system performs preliminary action by predicting performance degradation before it actually occurs. Through continuous monitoring and analysis of correction amount trends, the system identifies when the eccentricity correction unit is approaching performance limits, allowing maintenance to be scheduled in advance to prevent substrate yield loss.
2Reliability
If continuous monitoring of eccentricity correction is implemented, then performance degradation prediction is improved, but device complexity increases
Solution Approach 1:
The eccentricity correction unit performs self-service by inherently providing the correction amount data that the control unit needs for monitoring. The control unit simply stores and analyzes this naturally generated data without requiring separate sensors or additional measurement systems, thus avoiding increased device complexity while enabling continuous monitoring.
3Manufacturing precision
If eccentricity correction is applied to maintain substrate positioning, then manufacturing precision is improved, but the correction unit may degrade beyond allowable limits
Solution Approach 1:
The system performs preliminary action by predicting performance degradation before it actually occurs. Through continuous monitoring and analysis of correction amount trends, the system identifies when the eccentricity correction unit is approaching performance limits, allowing maintenance to be scheduled in advance to prevent substrate yield loss.
Data Source
AI summary
A method for monitoring performance of an eccentricity correction unit, the method includes a first operation of measuring eccentricity of a substrate mounted on a support unit and storing an amount of eccentricity correction corrected by the eccentricity correction unit such that measured eccentricity of the substrate is within a preset allowable eccentricity value, and a second operation of monitoring, based on the stored amount of eccentricity correction, performance degradation of the eccentricity correction unit.