Copper Foil

All of UACJ Foil’s copper foil is order made. We tailor our products to fit customer needs, including materials, measurements and material properties. Our reliable high-quality, high-grade copper foil is used in a variety of products such as cutting-edge electronics, high-end consumer appliances and luxury foods.

We constantly strive to create next-generation applications for copper foil using innovative ideas and solid R&D.

Picture of Copper Foil

Characteristics

UACJ Foil offers world-quality, wide-sheet copper foil for FPC, batteries, electrical lines and other applications. Find out more about the advantages of UACJ Foil’s rolled copper foil.

  Tough Pitch Copper, Oxygen-free Copper
Refining Softness, hardness
Measurements Thickness: ultra-thin (4 μm and up)/Width: wide-sheet (up to 650 mm)

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Applications

  • Electromagnetic wave shielding
  • Printed circuit boards
  • Lithium-ion battery
  • Antibacterial copper foil application, etc.

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Low-roughness Rolled Copper Foil

Using sophisticated rolling technologies accumulated over many years, UACJ Foil has developed rolled copper foil with minimal surface roughness. We can realize a surface roughness (surface roughness meter) of Rz 0.4 μm, allowing manufacture of fine pattern circuits.

Picture of Low-roughness Rolled Copper Foil

Characteristics

  • Available in surface roughness (surface roughness meter) as fine as Rz 0.4 μm.
  • Suited for fine pattern circuits.
  • Supports high frequencies (GHz), and suited for circuit patterns resistant to skin effect.

Specifications

Materials Tough pitch copper
Thickness 8-35 μm
Width 250-650 mm
Surface processing It will be provided as a single foil.We do not accept surface treatment.

Applications

  • Fine pattern/high frequency printed wiring boards, etc.

Characteristics

Mechanical/electrical characteristics (12 μm thickness)

Item Representative Value
Tensile strength normal condition (MPa) 450
Stretchability normal condition (%) 1.4
Electrical conductivity 101
The value is a representative value and does not guarantee the numerical value.

Surface roughness

Sample SRM (Surface Roughness Meter) AFM
Rz Ra Rz Ra
ES foil 0.4 0.05 0.24 0.13
Previous UACJ Foil rolled copper foil 0.7 0.09 0.4 0.31
Electrolytic copper foil M surface 1.5 0.27 1.2 0.26
Electrolytic copper foil S surface 1.8 0.33 1.3 0.27
The value is a representative value and does not guarantee the numerical value.

Surface photograph (SEM image)

ES foil　Rz 0.4 μm (SRM)
Image of ES foil　Rz 0.4 μm (SRM)
Previous UACJ Foil rolled copper foil　Rz 0.7 μm (SRM)
Image of Previous UACJ Foil rolled copper foil　Rz 0.7 μm (SRM)
Electrolytic copper foil M surface　Rz 1.5 μm (SRM)
Image of Example Electrolytic copper foil M surface　Rz 1.5 μm (SRM)
Electrolytic copper foil S surface　Rz 1.8 μm (SRM)
Image of Example Electrolytic copper foil S surface　Rz 1.8 μm (SRM)

Surface shape (AFM image)

ES foil　Rz 0.24 μm (AFM)
Image of ES foil　Rz 0.24 μm (AFM)
Previous UACJ Foil rolled copper foil　Rz 0.40 μm (AFM)
Image of Previous UACJ Foil rolled copper foil　Rz 0.40μm(AFM)
Electrolytic copper foil M surface　Rz 1.2 μm (AFM)
Image of Example Electrolytic copper foil M surface　Rz 1.2μm(AFM)
Electrolytic copper foil S surface　Rz 1.3 μm (AFM)
Image of Example Electrolytic copper foil S surface　Rz 1.3μm(AFM)

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