Portable Fluorine Generator Plasma Reactor Safety
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Solution Overview
Problem
The semiconductor manufacturing industry faces challenges in safely and efficiently generating fluorine gas at its point of use due to the toxicity and reactivity of atomic and molecular fluorine, which is typically required for calibrating analytical devices used in tracking hazardous air pollutants, but poses safety hazards when stored in bulk quantities.
Innovation Solution
A portable apparatus and method for generating fluorine gas (F2) using a plasma reactor unit within a housing that mixes a feed gas, such as NF3, with an inert gas like nitrogen, allowing for in-situ production of F2 for calibration purposes, thereby avoiding the need for bulk fluorine storage and minimizing safety risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fluorine gas is stored in bulk quantities for calibration purposes, then calibration accuracy is improved, but safety risks increase due to toxicity and reactivity
Solution Approach 1:
The patent extracts the fluorine generation function from bulk storage by using a plasma reactor to generate fluorine on-demand from NF3 feed gas. This eliminates the need for storing bulk fluorine gas while maintaining calibration accuracy through immediate generation at the point of use.
Solution Approach 2:
The patent introduces NF3 (nitrogen trifluoride) as an intermediary substance that can be safely stored and transported, then converts it to fluorine gas in-situ through plasma processing. This intermediary approach allows safe storage of fluorine-containing material without the hazards of storing molecular fluorine.
2Object-affected harmful factors
If fluorine gas is generated on-site from NF3 using plasma processing, then safety is improved by eliminating bulk storage, but device complexity increases
Solution Approach 1:
The plasma reactor unit serves multiple functions: it processes NF3 feed gas, generates fluorine gas, and provides calibration standards. This multi-functionality reduces the need for separate systems and justifies the added complexity through consolidated functionality.
Solution Approach 2:
The system changes the physical and chemical parameters of the feed gas by introducing it into a plasma environment, transforming NF3 molecules into atomic fluorine and nitrogen. This parameter change enables safe storage of the feed gas while generating the required fluorine on-demand.
3Ease of operation
If a portable apparatus is used for fluorine generation, then ease of operation is improved by providing point-of-use calibration, but manufacturing complexity increases
Solution Approach 1:
The patent segments the fluorine generation system into a portable, self-contained unit that can be deployed at various locations. This segmentation enables point-of-use calibration while allowing the system to be manufactured as a modular, transportable apparatus rather than a fixed installation.
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
Enables safe and efficient generation of fluorine gas at the point of use, reducing the risk of catastrophic leaks and making F2 measurements easier by providing only the necessary amount of F2 for calibration, while ensuring safety and accuracy in tracking hazardous emissions.
Implementation Method 1
a plasma reactor unit disposed within the housing operable to separate fluorine (F2) from the feed gas comprising fluorine
Implementation Method 2
a dilution system disposed within the housing operable to mix the feed gas comprising fluorine with the inert gas
Data Source
AI summary
A method and apparatus for generation of fluorine gas (F2) in situ at the point of use is provided. The portable fluorine generator includes a dilution system disposed within a housing and operable to mix a feed gas comprising fluorine with an inert gas. The portable fluorine generator further includes a plasma reactor unit disposed within the housing and operable to separate fluorine from the feed gas comprising fluorine.