Sheet Passivation Stacking With Protection Film Against Wrap-Around Plating
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Solution Overview
Problem
The passivation of sheet-like materials with grid lines results in gaps between adjacent materials, leading to excess film layers on non-passivated surfaces and performance degradation due to process gas wrap-around plating.
Innovation Solution
A passivation method involving the use of a protection film to fill or cover the gaps between adjacent sheet-like materials, ensuring uniform passivation by embedding grid lines within the film and preventing process gas wrap-around plating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sheet-like materials with grid lines are stacked for passivation, then the to-be-passivated side surface can be exposed to process gas, but gaps between adjacent materials cause process gas to wrap-around and deposit excess film on non-passivated surfaces
Solution Approach 1:
A protection film is introduced as an intermediary element between adjacent sheet-like materials. This protection film fills the gaps created by grid lines and prevents process gas from wrapping around and depositing on non-passivated surfaces. The protection film is selectively removed after passivation to reveal the properly passivated surfaces.
Solution Approach 2:
The protection film is applied in advance before the passivation process to prevent the harmful wrap-around deposition. By establishing this protective barrier beforehand, the patent prevents the process gas from accessing surfaces that should not be passivated, thereby eliminating the root cause of excess film formation.
2Productivity
If sheet-like materials are stacked with grid lines facing each other, then passivation can be performed on to-be-passivated surfaces, but gaps allow process gas to penetrate and plate on surfaces not intended for passivation
Solution Approach 1:
The protection film serves as a mediator that enables high-throughput stacking while maintaining product quality. It allows multiple sheets to be processed simultaneously without compromising the integrity of the passivation process, as it prevents process gas from creating defects on non-passivated surfaces.
Solution Approach 2:
The protection film is implemented as a thin, flexible layer that can conform to the surface topology of the sheet-like materials including the grid lines. This thin film structure provides effective protection while minimizing interference with the passivation process and allowing for easy removal after treatment.
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
Improves the performance of passivated sheet-like materials by preventing excess film deposition on non-passivated surfaces and enhancing uniformity, thus improving the quality of the final product.
Implementation Method 1
the protection film fills a gap between adjacent sheet-like materials
Data Source
AI summary
Disclosed are a passivation method, a cell, and an auxiliary passivation device for implementing the passivation method to solve a problem of a gap between adjacent sheet-like materials when passivating to-be-passivated side surface of the sheet-like materials, causing process gas to wrap-around plating the sheet-like materials along the gap. The passivation method includes: placing a sheet-like material on a carrying device; covering at least one layer of protection film on a surface, away from the carrying device, of the sheet-like material; stacking a next sheet-like material on a side, away from the sheet-like material, of the protection film; and passivating to-be-passivated side surface of stacked sheet-like materials. The wrap-around plate with the process gas on the sheet-like material along the gap between adjacent sheet-like materials during passivation may be avoided.