Semiconductor Exposure System Synchronization Accuracy Optimization
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Solution Overview
Problem
In semiconductor device manufacturing, fine misalignment corrections can degrade exposure image formation performance due to variations in synchronization accuracy between the substrate and original plate stages, necessitating a method to optimize correction parameters while maintaining image formation quality.
Innovation Solution
A semiconductor device manufacturing system that creates device information linking image formation performance with mechanical operation accuracy, specifies constraints based on required performance, and adjusts correction parameters to ensure optimal operation accuracy, thereby improving synchronization accuracy and maintaining image formation quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fine misalignment corrections are applied, then manufacturing precision is improved, but mechanical operation accuracy deteriorates due to synchronization variations
Solution Approach 1:
The system performs preliminary measurement of synchronization accuracy between substrate and original plate stages before exposure, and pre-calculates optimal correction parameters that account for measured synchronization variations. This preliminary characterization of mechanical performance enables subsequent fine misalignment corrections to be applied with known and controlled accuracy.
Solution Approach 2:
The system measures actual synchronization accuracy during stage operations and uses this feedback information to adjust correction parameters dynamically. By continuously monitoring the relationship between substrate and original plate stage positions, the system compensates for synchronization variations and maintains both fine misalignment correction capability and reliable operation.
2Reliability
If correction parameters are adjusted to improve synchronization accuracy, then mechanical operation accuracy is improved, but image formation performance may be compromised
Solution Approach 1:
The system measures image formation performance (exposure amount margin and focus depth) across multiple parameters and identifies optimal parameter combinations that satisfy both synchronization accuracy requirements and image quality requirements. By characterizing the relationship between exposure parameters and performance outcomes, the system can adjust correction parameters without compromising image formation.
3Manufacturing precision
If exposure conditions are optimized for image formation performance, then manufacturing precision is improved, but mechanical operation constraints are tightened
Solution Approach 1:
The system pre-evaluates exposure conditions by measuring image formation performance across different exposure amounts and focus settings before actual production. This preliminary characterization creates a database of optimal exposure parameters that can be directly applied without requiring complex real-time mechanical adjustments during exposure operations.
Data Source
AI summary
According to one embodiment, there is provided a semiconductor device manufacturing system, including a storage unit, a specifying unit, a determination unit and an adjustment unit. The storage unit stores device information indicating a relationship between image formation performance of an exposure device used for manufacturing a semiconductor device and mechanical operation accuracy. The specifying unit specifies a constraint of the mechanical operation accuracy according to the device information and the required image formation performance. The determination unit determines whether or not a correction parameter of an exposure condition satisfies the constraint. The adjustment unit adjusts the correction parameter according to a determination result of the determination unit.