Plasma Cell Floating Flange Thermal Expansion Compensation
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Solution Overview
Problem
Existing plasma cell designs fail to provide adequate resistance to high temperature and high pressure environments, compromising the integrity of seals and the quality of the atmosphere inside the plasma cell, which is crucial for the illumination of ever-shrinking integrated circuits.
Innovation Solution
A plasma cell design featuring a transmission element with movable floating flanges that compensate for thermal expansion, along with a compressive sealing element and connecting rods, allowing for the use of various materials and operation across a range of temperatures and pressures without matching thermal expansion coefficients, ensuring adequate sealing and pressure maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid flanges are used to maintain structural integrity, then mechanical strength is improved, but thermal expansion mismatch causes seal failure and stress concentration
Solution Approach 1:
The flange is designed with a bellows structure that allows dynamic movement and deformation to accommodate thermal expansion differences between dissimilar materials, transforming the rigid structure into a flexible one that maintains seal integrity under thermal stress
Solution Approach 2:
The bellows structure acts as a flexible element between the dissimilar materials, allowing relative movement and absorbing thermal expansion stresses without compromising the rigid structural integrity of the overall assembly
2Adaptability or versatility
If dissimilar materials are used to achieve desired thermal and mechanical properties, then functional performance is improved, but thermal expansion mismatch causes stress and seal failure
Solution Approach 1:
The bellows structure serves as an intermediary element between dissimilar materials with different thermal expansion coefficients, mediating the thermal stress by providing a flexible connection that accommodates dimensional changes without transmitting harmful stresses to the rigid components
3Device complexity
If fixed flange design is used to simplify structure, then device complexity is reduced, but inability to compensate thermal expansion compromises sealing
Solution Approach 1:
The design explicitly incorporates thermal expansion compensation through the bellows structure, which is engineered to expand and contract in response to temperature changes, thereby maintaining seal integrity in thermally variable environments
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 design enhances the plasma cell's ability to operate in a broader range of temperatures and pressures, maintaining seal integrity and pressure within the cell while reducing contact stress on the transmission element, thus supporting the generation of high-power broadband light for inspection purposes.
Implementation Method 1
the one or more floating flanges are movable to compensate for thermal expansion of the transmission element
Implementation Method 2
the transmission element is at least partially transparent to at least a portion of the illumination generated by the illumination source and at least a portion of the broadband radiation emitted by the plasma
Data Source
AI summary
A plasma cell for forming light-sustained plasma includes a transmission element configured to contain a volume of gas, a first terminal flange disposed at or near an opening of the transmission element, a second terminal flange disposed at or near another opening of the transmission element, a floating flange disposed between the first or second terminal flange and the transmission element. The floating flange is movable to compensate for thermal expansion of the transmission element. Further, the floating flange is configured to enclose the internal volume of the transmission element to contain a volume of gas within the transmission element. The transmission element is configured to receive illumination from an illumination source in order to generate plasma within the volume of gas. The transmission element is transparent to a portion of the illumination from the illumination source and a portion of broadband radiation emitted by the plasma.