Plating Paddle Vibration Suppression via Magnetic Field
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Solution Overview
Problem
High-speed operation of paddles in electroplating apparatuses leads to increased resistance and intensified vibration, risking paddle contact with substrates and potential breakage.
Innovation Solution
Incorporation of magnetic forces between a paddle magnet on the paddle and a guide magnet on the plating bath to suppress the vibration of the paddle's unsupported end portion during reciprocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the moving speed of the paddle is increased to enhance productivity and reduce plating time, then the plating efficiency is improved, but the resistance from plating solution increases and vibration intensifies, risking paddle contact with substrate and potential breakage
Solution Approach 1:
The patent replaces mechanical vibration suppression mechanisms with a magnetic field-based system. Magnets are attached to the paddle and the plating bath to create magnetic attraction forces that suppress paddle vibration during high-speed reciprocating motion, eliminating the need for complex mechanical dampers or guides while enabling higher operating speeds
Solution Approach 2:
The patent changes the physical state of the system by introducing magnetic fields as a new parameter to control paddle dynamics. By adjusting magnetic field strength through magnet selection and positioning, the system optimizes the balance between paddle stirring effectiveness and vibration suppression, allowing operation at higher speeds without mechanical contact
2Manufacturing precision
If the paddle moving speed is increased to promote ion supply and enhance plating quality, then the plating quality is improved, but the vibration in directions approaching and leaving the substrate intensifies, creating risk of contact
Solution Approach 1:
The patent substitutes mechanical vibration control with magnetic field control. Magnets positioned on the paddle and plating bath create attractive forces that counteract the vibrational tendencies of the paddle during high-speed reciprocating motion, suppressing vibrations in the direction approaching and leaving the substrate without mechanical contact
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
Reduces paddle vibration and prevents breakage, allowing for higher-speed operation without mechanical guides, thereby enhancing plating efficiency and reducing manufacturing costs.
Implementation Method 1
The first magnet and the second magnet are configured to exert a magnetic force on each other so that a second end portion on an opposite side to the first end portion of the paddle is suppressed from vibrating in directions approaching and leaving the substrate while the paddle is moving
Data Source
AI summary
A plating apparatus for plating a substrate is provided to reduce vibration of a paddle. The plating apparatus includes a plating bath configured to accommodate plating solution; a paddle that is arranged in the plating bath, and configured to move in a reciprocating direction along a surface of the substrate to stir the plating solution; a support member for supporting a first end portion of the paddle; a first magnet provided on the paddle; and a second magnet provided on the plating bath. The first magnet and the second magnet are configured to exert a magnetic force on each other so that a second end portion on an opposite side to the first end portion of the paddle is suppressed from vibrating in directions approaching and leaving the substrate while the paddle is moving.