Electroplating Regulating Plate for Thickness Uniformity
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Solution Overview
Problem
Electroplating thickness uniformity is adversely affected due to variations in electric field lines between the anode and cathode, caused by properties of the film layer on the substrate, leading to uneven metal plating layer distribution.
Innovation Solution
An electroplating apparatus with a regulating plate featuring an insulating grid plate and uniformly and randomly arranged magnetic components, which divergently direct electric field lines through Lorentz force, ensuring a uniform distribution of electric field lines across the substrate, thereby maintaining consistent metal plating layer thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional electroplating is performed without a regulating plate, then the electroplating process is simple, but the electroplating thickness uniformity is poor due to uneven electric field line distribution caused by film layer properties
Solution Approach 1:
A regulating plate is introduced as an intermediary component between the anode and cathode. This plate includes an insulating grid with magnetic components that act as mediators to adjust and uniformize the electric field line distribution, thereby improving electroplating thickness uniformity without fundamentally changing the basic electroplating process
Solution Approach 2:
The regulating plate features locally differentiated structures with magnetic components arranged in specific patterns on the insulating grid. These local variations in magnetic field strength and distribution create corresponding local adjustments to the electric field, compensating for non-uniformities caused by the substrate film layer properties
2Manufacturing precision
If magnetic components are arranged to uniformize electric field lines, then electroplating thickness uniformity is improved, but the device complexity increases due to the regulating plate with uniformly and randomly arranged magnetic components
Solution Approach 1:
The regulating plate is segmented into an insulating grid structure with discrete magnetic components positioned at specific locations. This segmentation allows the system to manage and control the magnetic field distribution in manageable units, making the complex function of uniformizing electric fields achievable through modular arrangement of simpler components
Solution Approach 2:
The regulating plate combines dissimilar materials - an insulating grid material with magnetic components - to create a composite structure. The insulating material provides electrical isolation while the magnetic components provide field uniformization, together achieving a function that neither material could accomplish alone
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 apparatus effectively screens electric field lines, ensuring a uniform density of electric field lines on the substrate, thereby mitigating uneven electroplating thickness and improving the uniformity of the metal plating layer.
Implementation Method 1
uniformly and randomly arranged magnetic components, which divergently direct electric field lines through Lorentz force
Implementation Method 2
Electroplating has been widely used in various fields
Implementation Method 3
A metal plating layer is formed on the substrate to be plated
Data Source
AI summary
An electroplating apparatus including an anode and a cathode, a power supply, and a regulating plate is provided. The power supply is electrically connected to the anode and the cathode. The regulating plate is arranged between the anode and the cathode. The regulating plate includes an insulating grid plate and a plurality of magnetic components. The plurality of magnetic components are uniformly and randomly arranged on the insulating grid plate. An electroplating method is also provided.