Electroplating Web Contact Nozzle for Uniform Coating
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Solution Overview
Problem
Existing electroplating systems face difficulties in ensuring good electrical contact between objects to be plated and electrodes, leading to uneven coating and weaknesses in the coating layer due to challenges in maintaining consistent current flow.
Innovation Solution
A system and method for electroplating a web of conductive material using a frame, transport mechanism, electrical brush-contact, and plating bath with a low electrical conductivity fluid nozzle to manage residual conductive liquid and ensure consistent current flow, thereby improving the uniformity and quality of the coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the web is transported directly from the plating bath to the electrical contact, then the electroplating process is simple, but residual conductive liquid remains on the web surface causing poor electrical contact and uneven coating
Solution Approach 1:
The patent applies preliminary action by introducing a fluid application zone between the plating bath and electrical contact that proactively removes residual conductive liquid from the web surface before electrical contact is made. This preliminary removal action prevents poor electrical contact and ensures uniform coating, resolving the contradiction between process simplicity and coating precision.
2Device complexity
If residual conductive liquid remains on the web surface, then the electroplating process is simpler, but electrical contact is poor leading to uneven coating
Solution Approach 1:
The patent uses an intermediary approach by introducing a fluid application zone as a mediator between the plating bath and electrical contact. This intermediary zone applies low electrical conductivity fluid to remove residual conductive liquid, ensuring reliable electrical contact without complicating the overall process architecture.
3Device complexity
If electrical contact is made with residual conductive liquid present, then the system is simpler, but heat generation increases reducing electrical contact life
Solution Approach 1:
The patent applies preliminary action by removing residual conductive liquid through fluid application before electrical contact is made. This preliminary removal prevents excessive heat generation during contact, thereby extending the life of the electrical contact while maintaining system simplicity.
4Manufacturing precision
If a fluid application zone is added to remove residual liquid, then electrical contact is improved, but the system becomes more complex
Solution Approach 1:
The patent merges the fluid application function with the existing web transport mechanism by positioning the fluid application zone along the web's path between the plating bath and electrical contact. This merging approach improves coating uniformity while minimizing additional system complexity by utilizing the existing transport infrastructure.
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 solution ensures a consistent and uniform coating by effectively removing residual conductive liquid and maintaining optimal electrical contact, reducing the risk of 'reverse plating' and extending the life of electrical contacts by minimizing heat generation.
Implementation Method 1
an electrical brush-contact coupled to the frame, the electrical brush-contact configured to electrically engage the web thereby causing current to flow from the electrical brush-contact into the web
Implementation Method 2
a plating bath containing a volume of an electrically conductive liquid therein, the electrically conductive liquid including a plurality of ions of the source material, wherein the transport mechanism is configured to transport the web through the plating bath such that a portion of the web is disposed in the electrically conductive liquid, the current flowing into web causing at least a portion of the plurality of ions of the source material to attach to a surface of the portion of web disposed in the electrically conductive liquid
Implementation Method 3
at least one nozzle coupled to the frame, the nozzle being configured to flow a low electrical conductivity fluid onto the surface of the portion of the web responsive to the transport mechanism transporting the portion of the web out of the plating bath, the low electrical conductivity fluid removing residual electrically conductive liquid disposed on the web
Data Source
AI summary
A system for electroplating a web of conductive material with a source material comprises a transport mechanism, an electrical contact, a plating bath, and at least one nozzle. The transport mechanism transports the web through the system. The electrical contact electrically engages the web to cause current to flow into the web. The plating bath contains a volume of an electrically conductive liquid contain ions of the source material. The nozzle is configured to flow a low electrical conductivity fluid onto the web. A portion of the web is immersed in the electrically conductive liquid. The current flowing in the web causes the ions of the source material in the electrically conductive liquid to attach to a surface of the portion of the web.