CVD Shower Head Lifting Structure for Clean Vacuum Replacement
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Solution Overview
Problem
The deposition of materials on the bottom surface of the shower head in chemical vapor deposition apparatuses leads to the formation of contaminants, necessitating frequent cleaning or replacement, which is inefficient and disruptive to the process.
Innovation Solution
A lifting apparatus with enhanced stiffness is introduced, featuring a main plate, auxiliary plate, coupling units, and support structures to facilitate easy separation and replacement of the shower head without disrupting the vacuum environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the shower head is made thinner to reduce deposition accumulation, then the deposition film thickness is reduced, but the stiffness and structural integrity deteriorate
Solution Approach 1:
The patent applies local quality by varying the thickness of the shower head plate - the central region has a greater thickness to maintain stiffness and prevent deformation during lifting, while the peripheral regions are thinner to reduce overall weight and deposition accumulation. This non-uniform thickness distribution optimizes both structural integrity and deposition control.
Solution Approach 2:
The patent introduces a lifting apparatus with multiple connecting pillars that extend vertically to support the shower head during separation and replacement operations. This adds a vertical dimension to the replacement process, allowing the shower head to be lifted and moved without compromising its structural integrity during the operation.
2Ease of repair
If the shower head is made thinner to facilitate cleaning and replacement, then the ease of maintenance is improved, but the structural stability deteriorates
Solution Approach 1:
The patent segments the shower head replacement process into distinct steps using the lifting apparatus - first separating the upper chamber, then lifting the shower head with connecting pillars, and finally replacing it. This segmentation allows for controlled manipulation of the shower head without requiring it to be excessively thin, maintaining structural stability while still enabling easy replacement.
Solution Approach 2:
The lifting apparatus acts as an intermediary between the shower head and the operator - it provides mechanical support through connecting pillars and distributes lifting forces evenly, allowing the shower head to be handled and replaced without direct manual manipulation that could compromise its structural integrity.
3Productivity
If a lifting apparatus is introduced to facilitate shower head replacement, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The lifting apparatus is designed with multi-functionality - it serves both as a structural support during shower head replacement and as a lifting mechanism for removing and installing the shower head. The connecting pillars and support ring work together to provide both mechanical support and lifting capability, reducing the need for separate specialized devices.
Solution Approach 2:
The patent merges the support function and lifting function into a single integrated apparatus - the connecting pillars provide both structural support during separation and the mechanical means for lifting. This consolidation reduces overall system complexity compared to having separate support fixtures and lifting mechanisms.
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 lifting apparatus allows for efficient detachment and replacement of the shower head, reducing contamination and maintaining process integrity by minimizing deposition on the shower head surface.
Implementation Method 1
a thickness of a central portion of the main plate is greater than a thickness of each of both opposing side portions of the main plate, which are opposite to each other in the first direction
Data Source
AI summary
A lifting apparatus includes a main plate, an auxiliary plate disposed on the main plate, a plurality of coupling units which connects the main plate to the auxiliary plate, a plurality of leg parts adjacent to both opposing sides of each of the main plate and the auxiliary plate and extending downward, a head part connected to the main plate and protruding upward, a plurality of connecting pillars connected to the main plate and extending downward, and a support ring connected to lower ends of the connecting pillars.