Slotted Paddle Chamber Baffles for Electroplating Splash Control
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Solution Overview
Problem
Electroplating processes in semiconductor manufacturing often result in splashing of plating fluid, leading to fluid loss, contamination, and increased downtime for cleaning, which affects the quality and uniformity of metal deposits on substrates.
Innovation Solution
Incorporating baffles with slots and a mesh in the electroplating system to prevent fluid splashing by obstructing fluid movement, positioned at strategic locations such as radially outward of the weir thief electrode assembly and vertically adjacent to the rotor and paddle, with mounting tabs for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If baffles are added to prevent fluid splashing, then fluid loss is reduced, but device complexity increases
Solution Approach 1:
The baffle is divided into multiple segments with slots between them, allowing the structure to break fluid flow into smaller portions while maintaining overall functionality. This segmentation reduces the impact on any single area and allows fluid to pass through controlled gaps, minimizing splashing while keeping the design manageable
Solution Approach 2:
The baffle acts as an intermediary element positioned between the fluid source and the rotor/plating chamber. It mediates the fluid flow by blocking direct splashing paths while allowing controlled passage through slots, thus protecting the rotor and chamber without completely obstructing fluid circulation
2Object-affected harmful factors
If baffles are positioned to block fluid movement, then splashing is prevented, but fluid flow is restricted
Solution Approach 1:
The baffle structure implements local quality by having different regions with different properties: solid sections that block splashing and slot regions that permit fluid flow. This localized differentiation allows the baffle to perform dual functions of preventing harmful splashing while maintaining necessary fluid circulation in specific areas
Solution Approach 2:
The baffle incorporates slot openings that function similarly to porous structures, allowing fluid to pass through controlled gaps. This porous-like design enables the baffle to filter out splashing motion while permitting beneficial fluid flow and circulation patterns to continue
3Productivity
If cleaning downtime is reduced, then productivity increases, but cleaning frequency must increase
Solution Approach 1:
The baffle structure provides beforehand protection by preventing fluid splashing before it can contaminate the rotor and plating chamber. This proactive approach reduces the frequency and extent of cleaning required, thereby minimizing cleaning downtime and maintaining higher productivity over time
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 baffles effectively mitigate fluid splashing, reducing downtime for cleaning and maintaining additive levels, thereby ensuring consistent and high-quality metal deposition on substrates.
Implementation Method 1
The at least one baffle may be configured to limit or prevent fluid from splashing the rotor or the plating chamber during operation of the plating chamber
Implementation Method 2
A mesh may be positioned in each slot of the plurality of slots
Data Source
AI summary
Electroplating systems according to embodiments of the present technology may include a plating chamber configured to deposit metal material onto substrates positioned in the plating chamber. The plating chamber may include a rotor and a vessel. The electroplating systems may include at least one of baffle positioned in the plating chamber. The at least one baffle may define a plurality of slots. The at least one baffle may be configured to limit or prevent fluid from splashing the rotor or the plating chamber during operation of the plating chamber.