Transfer Chamber Port Layout for Uniform Vacuum Purging
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Solution Overview
Problem
During semiconductor and flat panel display manufacturing, vacuum processing generates undesired byproducts that form particles, reducing yield and requiring effective control to prevent deposition and re-deposition within vacuum chambers.
Innovation Solution
The vacuum processing apparatus optimizes the arrangement of vent and vacuum ports within transfer chambers to ensure line-symmetric gas flows, minimizing dead spaces and effectively purging byproducts from chamber walls, thereby improving yield and reducing maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional port arrangement is used in transfer chamber, then device complexity is reduced, but particles are generated due to non-uniform gas flows and dead spaces
Solution Approach 1:
The patent applies asymmetry by positioning the vacuum port and vent port at different locations along the longitudinal axis of the transfer chamber, creating asymmetric gas flow patterns that effectively purge particles while maintaining manufacturing precision
Solution Approach 2:
The transfer chamber is segmented into multiple regions with strategically placed ports, dividing the gas flow into distinct paths that prevent particle deposition in critical areas while managing overall system complexity
2Productivity
If line-symmetric port arrangement is used, then gas flows become uniform and dead spaces are minimized, but device complexity increases
Solution Approach 1:
The patent uses asymmetric port positioning along the longitudinal axis to create directional gas flows that enhance particle removal efficiency, improving productivity while managing the complexity through deliberate asymmetric design rather than complex symmetric arrangements
3Manufacturing precision
If multiple vent ports are added to improve particle purging, then particle control improves, but device complexity increases
Solution Approach 1:
The transfer chamber is divided into segments with strategically placed vent ports at specific locations, allowing effective particle control through localized purging while minimizing the total number of ports needed
Solution Approach 2:
Vent ports are positioned at specific locations where particle accumulation is most likely to occur, providing localized quality improvement in particle control rather than uniform distribution, thereby reducing the overall number of ports required
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 line-symmetric port arrangement ensures uniform gas flows, preventing local deposition of byproducts and enhancing the processing efficiency and yield of semiconductor and flat panel display devices by effectively purging particles from the vacuum chambers.
Implementation Method 1
The line-symmetric port arrangement ensures uniform gas flows, preventing local deposition of byproducts and enhancing the processing efficiency and yield of semiconductor and flat panel display devices by effectively purging particles from the vacuum chambers.
Implementation Method 2
The transfer chamber includes one or more vacuum ports, through which a gas inside the transfer chamber is exhausted
Data Source
AI summary
A vacuum apparatus includes process chambers, and a transfer chamber coupled to the process chambers. The transfer chamber includes one or more vacuum ports, thorough which a gas inside the transfer chamber is exhausted, and vent ports, from which a vent gas is supplied. The one or more vacuum ports and the vent ports are arranged such that air flows from at least one of the vent ports to the one or more vacuum ports are line-symmetric with respect to a center line of the transfer chamber.