DUV Discharge Chamber Electrode Alloy for Longer Service Life
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing discharge chambers in deep ultraviolet (DUV) light sources face a short lifespan due to the deterioration of traditional metal alloy electrodes, leading to non-uniform electric fields and unreliable light production, as the protective layers crack and become less conductive, resulting in reduced operational life.
Innovation Solution
The use of metal alloys with a zinc content between 33% and 50% by weight, particularly in the anode, which forms a more robust and adherent protective layer that maintains uniform conductivity and reduces exposure of the underlying metal alloy, thereby extending the discharge chamber's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional metal alloy electrodes are used in discharge chambers, then the initial light production is reliable, but the electrodes deteriorate over time causing non-uniform electric fields and reduced operational life
Solution Approach 1:
The patent changes the chemical composition parameters of the electrode material by specifying a metal alloy containing zinc in the range of 30-70 wt%, with preferred ranges of 40-60 wt% and more preferably 50-60 wt%. This parameter change in zinc content fundamentally alters the protective layer formation characteristics, enabling the electrode to maintain uniform conductivity and structural integrity over extended operational periods, thus resolving the contradiction between initial reliability and long-term durability
Solution Approach 2:
The patent employs a composite metal alloy material consisting of multiple elements (zinc, copper, nickel, and other metals) in specific proportions. This composite structure creates a synergistic effect where zinc forms a protective layer that prevents corrosion of the underlying alloy, while copper and nickel contribute to electrical conductivity and structural strength. The composite material approach allows the electrode to simultaneously achieve long lifespan and reliable light production
2Reliability
If electrodes with higher zinc content are used, then the protective layer is more robust and adherent, but the manufacturing complexity increases
Solution Approach 1:
The patent establishes specific parameter ranges for zinc content (30-70 wt%, preferably 40-60 wt%, more preferably 50-60 wt%) that optimize protective layer formation. These parameter specifications provide clear manufacturing targets that balance protective layer robustness with manufacturing feasibility. The defined ranges ensure sufficient zinc for protective layer formation while avoiding excessive zinc that would complicate alloy processing and increase manufacturing difficulty
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 increased zinc content in the metal alloys results in a longer-lasting protective layer that maintains electrode integrity and light beam production reliability, extending the discharge chamber's operational life beyond traditional limits.
Implementation Method 1
the metal component in the surface reacts with the halogen gas to form a layer of protective material on the surface
Implementation Method 2
a first electrode and a second electrode in the housing, the first electrode and the second electrode being separated from each other to form a discharge region between the first electrode and the second electrode
Implementation Method 3
the discharge region being configured to receive a gain medium including at least one noble gas and a halogen gas
Data Source
AI summary
A discharge chamber for a deep ultraviolet (DUV) light source includes a housing; and a first electrode and a second electrode in the housing, the first electrode and the second electrode being separated from each other to form a discharge region between the first electrode and the second electrode, the discharge region being configured to receive a gain medium including at least one noble gas and a halogen gas. At least one of the first electrode and the second electrode includes a metal alloy including more than 33% and less than 50% zinc by weight.