Press-laminated mirror steel plates are indispensable key tool materials in the PCB manufacturing process, mainly used in the pressing process of multi-layer printed circuit boards. This specially treated steel plate has extremely high surface flatness and finish, which can ensure that the PCB obtains ideal surface quality and dimensional accuracy during the pressing process at high temperature and pressure.
As a professional pressing buffer product manufacturer, the mirror steel plate we produce is made of high-quality alloy materials, and the surface roughness can be controlled at Ra≤0.05μm through precision grinding and special surface treatment processes, providing a reliable pressing platform for PCB manufacturing.
The core characteristics of pressed mirror steel plates
Superior surface quality
Our mirror steel plates have the following surface properties:
Ultra-high flatness: flatness ≤ 0.02mm/m²
Extreme finish: Surface roughness Ra≤0.05μm
Flawless surface: no scratches, no pits, no oxidation spots
Uniform microstructure: The grains are fine and uniform
Excellent mechanical properties
Mechanical properties of mirror steel plate:
High strength: tensile strength ≥ 800MPa
High hardness: surface hardness HRC50-55
Good toughness: elongation ≥ 12%
Stable size: coefficient of thermal expansion 11.5×10⁻⁶/°C
High temperature and corrosion resistance
Special treatment process gives steel plates:
High temperature resistance: long-term working temperature up to 300°C
Antioxidant capacity: a dense oxide layer forms on the surface
Corrosion resistance: 72h ≥ salt spray test
Anti-adhesion: Special coatings prevent resin from sticking
Technical advantages of pressed mirror steel plate
Improve PCB surface quality
The use of high-quality mirrored steel plates can significantly improve:
Copper foil surface finish
Line edge clarity
Media layer uniformity
Overall appearance quality
Guaranteed dimensional stability
The advantages of mirror steel plate are reflected in:
Reduces dimensional variation during pressing
Controls Z-axis expansion
Improve interlayer alignment accuracy
Ensure product consistency
Extend service life
Our mirror steel plates have:
Wear-resistant surface treatment
Excellent fatigue resistance
Repairability design
The average service life is more than 5000 times
Selection guide for pressing mirror steel plates
Select by size specification
Regular sizes include:
Standard sizes: 24"×36", 28"×42", etc
Large size: up to 48"×96"
Customized size: specially made according to equipment specifications
Thickness selection: 8mm, 10mm, 12mm, etc
Select by surface treatment
We offer a wide range of surface treatment options:
Normal mirror treatment: Ra≤0.05μm
Superfine mirror treatment: Ra≤0.02μm
Anti-stick coating treatment: reduces resin residue
Composite Functional Processing: Combines multiple characteristics
Select by application scenario
Different PCB types correspond to different steel plates:
Ordinary multilayer plate: standard mirror steel plate
HDI board: ultra-high precision steel plate
Flexible plate: special elastic steel plate
High frequency plate: low heat deflection steel plate
Recommendations for use and maintenance
How to use it correctly
To ensure best results:
Clean the surface of the steel plate before use
Control the appropriate pressing parameters
Check the surface condition regularly
Avoid mechanical collisions
Routine maintenance
Keys to extending the life of the steel plate:
Regular Polishing: Restore surface finish
Professional Repair: Deals with minor injuries
Reasonable storage: moisture-proof and anti-rust treatment
Usage records: Establish a life file
Industry development trends
Material innovation direction
In the future, mirror steel plates will be to:
Higher strength alloy material
Nanocomposite coating technology
Intelligent temperature control materials
Environmentally friendly recyclable materials
Manufacturing process advances
Improvements in the production process include:
Ultra-precision grinding technology
Automated surface inspection
Digital production management
Intelligent repair system
Functional integration development
Versatile integration trends:
Self-cleaning surface technology
Embedded Sensing Capabilities
Adaptive deformation design
Multiphysics coupling optimization
As a professional pressed cushion product manufacturer, we will continue to invest in research and development to provide customers with higher quality pressed mirror steel plate products and perfect technical services, and help the PCB industry develop in the direction of higher precision and higher quality. Choosing high-quality mirror steel plates is an important guarantee for improving the competitiveness and production efficiency of PCB products
