EUV Source 3D Diagnostics for Plasma Stability and Contamination Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lithography techniques, particularly extreme ultraviolet lithography (EUVL), face challenges in achieving high-resolution processes due to issues with monitoring and controlling the EUV radiation source, plasma stability, and contamination, which affect the efficiency and complexity of integrated circuit (IC) fabrication.
Innovation Solution
An EUV lithography system integrated with a control system that includes 3D diagnostics modules to monitor laser beam, plasma, and EUV radiation, analyze collected data for root cause identification, and actively tune and control parameters to enhance the lithography process, specifically for IC fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If EUV lithography is used to achieve higher resolution, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent implements real-time feedback control by monitoring plasma parameters (temperature, density, composition) and EUV radiation characteristics, then adjusting process parameters dynamically to maintain optimal lithography conditions and compensate for deviations
Solution Approach 2:
The patent replaces complex mechanical adjustment systems with automated control systems that use sensors and actuators to adjust plasma generation parameters and optical alignment, reducing mechanical complexity while improving precision
2Reliability
If 3D sensing and control modules are added to monitor and control the EUV radiation source, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple monitoring functions (plasma diagnostics, radiation measurement, alignment detection) into a unified control system that manages all aspects of the EUV source, reducing overall system complexity through functional integration
Solution Approach 2:
The control system performs self-diagnosis and automatic adjustment of source parameters based on real-time sensor data, reducing the need for external intervention and simplifying operational complexity
3Manufacturing precision
If active tuning and control of radiation source parameters is implemented, then manufacturing precision is improved, but use of energy increases
Solution Approach 1:
The patent uses periodic pulsed laser excitation to generate plasma and EUV radiation, allowing the system to operate in discrete cycles rather than continuous mode, reducing average energy consumption while maintaining precision through controlled timing
Solution Approach 2:
The patent dynamically adjusts plasma generation parameters (laser pulse duration, target material composition, gas pressure) to optimize the energy-to-radiation conversion efficiency, minimizing energy waste while maintaining lithography precision
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
The system improves the performance of EUV lithography by effectively monitoring and controlling the EUV radiation source, stabilizing plasma, and reducing contamination, thereby enhancing the efficiency and quality of IC fabrication processes.
Implementation Method 1
a laser device and a laser-produced plasma mechanism to generate an EUV radiation
Implementation Method 2
3D diagnostics modules to monitor laser beam, plasma, and EUV radiation
Data Source
AI summary
The present disclosure provides a lithography system including a radiation source and a control system. The control system includes a laser beam monitor configured to monitor laser beam generated from the radiation source and collect laser beam data, an analysis module configured to analyze the laser beam data and generate an analysis result, and a control module configured to adjust the radiation source according to the analysis result from the analysis module.