Solder Paste Stencil Surface Treatment for Coating Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Solder paste stencils face issues with adhesion loss and damage due to repeated use, leading to reduced printing efficiency and increased maintenance costs, as functional coatings delaminate from the stencil surface, especially when subjected to vertical forces and cleaning processes.
Innovation Solution
The use of laser structuring, plasma treatment, and functionalized primer layers to modify the stencil surface, creating a more wettable and adherent surface for hydrophobic and oleophobic coatings, which enhances adhesion and scratch resistance by removing contaminants and structuring the surface to increase bonding area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If functional coatings are applied to stencil surfaces to improve solder paste release, then printing quality is improved, but adhesion loss and delamination occur during repeated use and cleaning
Solution Approach 1:
The patent applies preliminary surface treatments (plasma treatment, laser structuring, or chemical etching) to the stencil substrate before applying functional coatings. This creates a pre-prepared surface with enhanced adhesion properties, preventing delamination during subsequent repeated use and cleaning operations while maintaining printing quality.
Solution Approach 2:
The patent employs composite structures combining the stencil substrate with intermediate adhesion promotion layers and functional coatings. This multi-layer composite approach ensures strong bonding between layers while maintaining the desired solder paste release properties on the print surface.
2Manufacturing precision
If smaller aperture sizes are used in stencils for manufacturing small components, then manufacturing precision is improved, but coating adhesion and durability are reduced
Solution Approach 1:
The patent applies preliminary surface treatments (plasma treatment, laser structuring, or chemical etching) to the stencil substrate before applying functional coatings. This creates a pre-prepared surface with enhanced adhesion properties, preventing delamination during subsequent repeated use and cleaning operations while maintaining printing quality.
Solution Approach 2:
The patent applies surface treatments and coatings specifically tailored for different regions of the stencil. The print surfaces receive functional coatings for solder paste release, while the aperture walls receive surface treatments that enhance coating adhesion and durability, allowing each region to have optimized properties for its specific function.
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 approach significantly improves the adhesion and durability of functional coatings on solder paste stencils, reducing damage and maintaining printing quality, even with smaller aperture sizes, and allowing for more precise manufacturing of small components.
Implementation Method 1
The use of laser structuring, plasma treatment, and functionalized primer layers to modify the stencil surface
Implementation Method 2
The use of laser structuring, plasma treatment, and functionalized primer layers to modify the stencil surface
Implementation Method 3
functionalized primer layers to modify the stencil surface, creating a more wettable and adherent surface for hydrophobic and oleophobic coatings
Data Source
AI summary
The present disclosure relates to surface modification of solder paste stencils to provide improved adhesion of a functional coating. The disclosed surface modifications include laser structuring, plasma treatments, and primers. Methods of using the solder paste stencils are further disclosed.