Chuck Vacuum Line Layout to Prevent Byproduct Buildup
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Solution Overview
Problem
The buildup of processing byproducts in the vacuum chuck and main pumping line of semiconductor processing tools reduces the effectiveness of securing semiconductor devices in place, leading to decreased productivity due to frequent maintenance needs.
Innovation Solution
An improved chuck vacuum line design with a first portion penetrating the sidewall of the main pumping line and a second portion parallel to the flow direction, featuring a larger outlet end to prevent byproduct accumulation, ensuring uninterrupted operation and improved temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional chuck vacuum line is used, then the structure is simple, but processing byproducts accumulate in the main pumping line reducing vacuum effectiveness
Solution Approach 1:
The chuck vacuum line is divided into two separate portions: a first portion that penetrates the sidewall of the main pumping line and a second portion that is substantially parallel to the sidewall. This segmentation allows the vacuum line to be positioned strategically without obstructing the main pumping line, preventing byproduct accumulation while maintaining structural feasibility.
Solution Approach 2:
The second portion of the chuck vacuum line is positioned in a spatial arrangement that is substantially parallel to the sidewall of the main pumping line, utilizing the third dimension (depth/height) rather than competing for horizontal space. This dimensional arrangement allows both lines to coexist without interference, maintaining vacuum effectiveness while avoiding blockage issues.
2Productivity
If the chuck vacuum line is positioned to prevent byproduct accumulation, then productivity improves, but the line configuration becomes more complex
Solution Approach 1:
Dividing the vacuum line into two portions enables strategic positioning that prevents byproduct accumulation in the main pumping line, thereby maintaining operational continuity and productivity without requiring complete system redesign.
Solution Approach 2:
The first portion of the chuck vacuum line acts as an intermediary element that penetrates the sidewall of the main pumping line, creating a controlled connection point that allows vacuum extraction without interfering with the main gas flow path, thus preventing byproduct buildup.
3Reliability
If a larger outlet end is used in the chuck vacuum line, then byproduct buildup is reduced, but manufacturing complexity increases
Solution Approach 1:
The chuck vacuum line features a varying cross-sectional design where the outlet end has a larger diameter than the inlet end. This local quality change is applied only at the critical outlet portion where byproduct accumulation is most likely to occur, providing enhanced resistance to buildup without requiring the entire line to be oversized or complex.
Solution Approach 2:
The diameter parameter of the chuck vacuum line is changed along its length, with the outlet end having a larger diameter than the inlet end. This parameter variation optimizes flow characteristics and prevents byproduct accumulation at the outlet where velocity reduction could lead to deposition, while keeping the overall design manufacturable.
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 improved chuck vacuum line reduces byproduct buildup, maintaining tool effectiveness and reducing maintenance frequency, thereby enhancing productivity and uniformity in semiconductor processing.
Implementation Method 1
a pump connected to the main pumping line to cause the process gas to be removed from the process chamber body through the main pumping line
Implementation Method 2
a chuck vacuum line connected to the chuck to apply a vacuum to the chuck to retain a semiconductor device against the chuck
Data Source
AI summary
A chuck vacuum line of a semiconductor processing tool includes a first portion that penetrates a sidewall of a main pumping line of the semiconductor processing tool. The chuck vacuum line includes a second portion that is substantially parallel to the sidewall of the main pumping line and to a direction of flow in the main pumping line. A size of the second portion increases between an inlet end of the second portion and an outlet end of the second portion along the direction of flow in the main pumping line.