Electroplating Anode Positioning Cylinder for Uniform Field
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Solution Overview
Problem
Existing electroplating devices face challenges in achieving uniform electroplating height due to non-uniform electric field distribution and anode consumption, leading to uneven deposition and difficulty in process control, especially for thin metal layers.
Innovation Solution
The electroplating device design includes a positioning cylinder that seals the anode, allowing only a specific surface area to contact the electroplating solution, ensuring the electric field is uniformly distributed across the substrate, and a driving mechanism to maintain a constant distance between the anode and substrate, preventing anode surface consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the anode surface area is made larger than the substrate, then the electric field can be generated sufficiently, but the electric field line density becomes non-uniform causing higher electroplating height at the edges
Solution Approach 1:
The anode is divided into two functional parts: a large outer anode surface for generating electric field, and a separate smaller effective surface area that is sealed to match the substrate size. This segmentation allows the anode to generate sufficient electric field while controlling the effective interaction area to achieve uniform electroplating height.
Solution Approach 2:
A positioning cylinder is introduced as an intermediary component between the anode and the electroplating solution. This cylinder seals the anode to restrict the effective surface area interacting with the solution, while allowing the anode to maintain its larger physical size for electric field generation. The cylinder acts as a mediator that decouples the anode's electric field generation function from its effective interaction area.
2Quantity of substance
If the anode is exposed to electroplating solution, then metal ions are replenished, but the anode surface is consumed and the distance to substrate increases altering the electroplating deposition rate
Solution Approach 1:
The anode is designed to be movable rather than fixed, allowing it to be adjusted vertically to compensate for surface consumption. The positioning cylinder enables the anode to maintain a constant effective distance from the substrate throughout the electroplating process, ensuring consistent deposition rate while still allowing metal ion replenishment.
Solution Approach 2:
The system incorporates monitoring of anode position and distance to substrate, allowing for real-time adjustment to maintain optimal electroplating conditions. As the anode surface is consumed, the feedback mechanism detects the change and adjusts the anode position to compensate, maintaining constant electroplating deposition rate.
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
This design enhances the uniformity of electroplating height on the substrate by maintaining consistent electric field intensity and stabilizes the electroplating process by ensuring the anode surface remains unchanged, improving the precision and consistency of the electroplating process.
Implementation Method 1
an electric field is generated on the surface of the anode, under the action of the electric field, metal is gradually deposited on the surface of the substrate
Implementation Method 2
In an electroplating process, an anode and a substrate are immersed in an electroplating solution, and an electric field is generated on the surface of the anode
Data Source
AI summary
Disclosed in an embodiment of the present invention is an electroplating device, comprising an electroplating tank, a clamp, a positioning cylinder and an anode, wherein the positioning cylinder is located in the electroplating tank; the positioning cylinder is open at one end; the anode is located inside the positioning cylinder, and the positioning cylinder comes in contact with the anode in a sealing manner; and in the entire surface region of the anode, only a first surface comes in contact with an electroplating solution, and the first surface is parallel and opposite to a substrate, with the center of the first surface being aligned with the center of the substrate, and the size of the first surface being similar to that of an effective electroplating region of the substrate. By means of the electroplating device, an electric field generated by the anode is uniformly distributed on the surface of the substrate, thereby improving the uniformity of the electroplating height on the surface of the substrate. Further disclosed in an embodiment of the present invention is an electroplating method using the electroplating device.