Variable Attenuation Units for Lithographic Radiation Distribution
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Solution Overview
Problem
Lithographic systems face challenges in efficiently distributing laser radiation among multiple tools without interruption due to maintenance and repair needs, as existing systems often rely on a single laser source that can be unreliable and inefficient in power distribution.
Innovation Solution
A lithographic system where two or more lithographic tools share a radiation source using variable attenuation units that direct and adjust laser beams between tools, ensuring continuous operation by redistributing the radiation source's power through beam splitting devices and multiple laser sources to prevent interruptions during maintenance and repair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single laser radiation source is used for multiple lithographic tools, then device complexity is reduced, but reliability deteriorates due to maintenance and repair interruptions
Solution Approach 1:
Multiple laser radiation sources are combined into a single system where they share common control and distribution infrastructure. The sources are merged through beam combining optics that integrate their outputs into a unified beam path, allowing multiple tools to be served by a coordinated array of sources rather than completely independent systems
Solution Approach 2:
The single laser source system is segmented into multiple independent laser sources that can operate autonomously. Each source can be independently maintained, repaired, or replaced without affecting the others, while still contributing to the overall system that serves multiple lithographic tools
2Device complexity
If laser power is distributed among multiple tools using a single source, then device complexity is reduced, but productivity deteriorates due to operation interruptions
Solution Approach 1:
Multiple laser sources are pre-positioned and pre-configured in the system architecture, ready to immediately take over if another source requires maintenance or repair. This preliminary arrangement of redundant sources eliminates waiting time and maintains continuous productivity
Solution Approach 2:
The system dynamically changes operational parameters by switching between multiple laser sources based on their availability and performance characteristics. When one source degrades or requires maintenance, the system transitions to another source, maintaining consistent output power and wavelength parameters for the lithographic tools
3Adaptability or versatility
If variable attenuation units are used to distribute laser beams, then power distribution flexibility is improved, but device complexity increases
Solution Approach 1:
Variable attenuation units are implemented with dynamic control capabilities that allow real-time adjustment of beam power distribution. The attenuation levels are dynamically modified based on the specific needs of each lithographic tool and the operational status of laser sources, providing flexible power management without fixed configurations
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 configuration enhances system throughput by efficiently distributing laser power among multiple tools, preventing operation interruptions during laser source maintenance and repair, and ensuring consistent energy levels for lithographic processes.
Implementation Method 1
the variable attenuation unit reflects a portion of the received light beam to the lithographic tool attached thereto and transmits a remaining portion of the received light beam to the lithographic tools downstream
Data Source
AI summary
Embodiments described herein provide a lithographic system having two or more lithographic tools connected to a radiation source using two or more variable attenuation units. In some embodiments, the variable attenuation unit reflects a portion of the received light beam to the lithographic tool attached thereto and transmits a remaining portion of the received light beam to the lithographic tools downstream. In some embodiments, the radiation source includes two or more laser sources to provide laser beams with an enhanced power level and which can prevent operation interruption due to laser source maintenances and repair.