Vacuum Gauge Protector Tortuous Path Filtration
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Solution Overview
Problem
Vacuum gauges used in deposition processes, such as atomic layer deposition, are prone to contamination and degradation due to exposure to deposition materials, leading to inaccurate pressure measurements and process variations.
Innovation Solution
A vacuum gauge protector is introduced, which creates a tortuous path to minimize the penetration of deposition materials while allowing adequate molecular flow and rapid pressure change sensing, thus preventing contamination and extending the operational lifetime of the vacuum gauge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the vacuum gauge is directly exposed to the deposition chamber, then the pressure measurement response is rapid, but the gauge becomes contaminated by deposition materials leading to inaccurate measurements
Solution Approach 1:
A protective structure is introduced as an intermediary component between the deposition chamber and the vacuum gauge. This protector allows pressure equilibrium while blocking deposition materials from reaching the gauge, thus maintaining measurement accuracy without direct exposure
Solution Approach 2:
The protective structure utilizes a thin-walled design that permits pressure equalization across its walls while physically blocking deposition materials. The thin film structure allows the gauge to sense pressure changes accurately without being contaminated by the deposition environment
2Object-affected harmful factors
If a protective structure is added to block deposition materials, then contamination is reduced, but the pressure measurement response time increases
Solution Approach 1:
The thin-walled protective structure allows rapid pressure equalization while maintaining blockage of deposition materials. The thin walls minimize the volume and mass of the barrier, enabling fast pressure response without sacrificing protection
Solution Approach 2:
The protective structure employs a porous or perforated design that allows gas molecules to pass through rapidly for pressure equilibrium while the overall structure blocks larger deposition materials from reaching the gauge
3Duration of action of stationary object
If the vacuum gauge is protected from deposition materials, then operational lifetime is extended, but device complexity increases
Solution Approach 1:
The system is divided into two functional segments: the deposition chamber and the protected gauge assembly. The protective structure creates a separate protected space that isolates the gauge from the deposition environment, extending its lifetime without significantly complicating the overall system
Solution Approach 2:
A relatively simple protective structure serves as an intermediary component that provides extended protection without requiring complex mechanisms. The design uses straightforward geometric forms and materials to achieve prolonged operational lifetime
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 vacuum gauge protector effectively reduces contamination and maintains accurate pressure measurements, ensuring the stability and precision of deposition processes by preventing deposition materials from reaching the sensitive internal components of the vacuum gauge.
Implementation Method 1
allowing adequate molecular flow and rapid pressure change sensing
Implementation Method 2
measure pressure of gas flowing from the input port through the body to the output port
Data Source
AI summary
A vacuum gauge protector for deposition systems includes a body comprising an input port that is configured to couple to a vacuum chamber, and an output port configured to couple to a vacuum gauge. A deposition material filter is positioned in the body to present a tortuous path to gases comprising deposition materials entering the body where the surface area of the deposition material filter is greater than 2000 mm2. In addition, the deposition material filter restricts deposition material from passing through the body to the output port so as to reduce vacuum gauge contamination while maintaining enough gas flow through the body to the output port so that the vacuum gauge response time can be less than 10 seconds.