A sheet made entirely of copper fibers, produced with advanced papermaking technology
This lightweight and flexible sheet, made entirely of copper fibers, combines copper’s excellent electrical and thermal conductivity with the porosity and flexibility of paper. We offer functional sheets for high-current electronic devices that enable thinner profiles, lighter weight, and greater design flexibility. [Features] 1. Effective thermal management through excellent heat dissipation - High specific surface area due to porous structure (10 times bulk ratio at same thickness) - Excellent air permeability - Thermal conductivity of copper material (20 times higher than stainless steel) 2.High electrical conductivity same level as copper bulk - High electrical conductivity (50 times higher than Stainless Fiber Sheet) (370 times higher than carbon fiber) 3. Flexibility like paper - Absorbs thermal dimensional changes at joints with dissimilar materials, enabled by its porous structure - Capable of folding, bending, and conforming to uneven surfaces - Suitable for use in movable and vibrating components 4. Space-saving and lightweight design - Controlled porous structure (adjustable porosity) - Uniform porous structure at thicknesses below 100 μm - Approximately one-third the weight of bulk (foil) for the same volume 5. Shape processing and rust/oxidation prevention treatment - Easy workability with scissors - Shape processing such as bending and forming - Various coating surface treatment
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*For more detailed information on physical properties, usage, etc., please refer to the catalog or feel free to contact us.
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Applications/Examples of results
- Heat Sink - Heat Dissipation Module
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In June 1914, TOMOEGAWA started its path as a pioneer of industrial specialty paper in Japan, and succeeded in domestic production of “electrical insulating paper and telecommunications paper” to meet the needs of telecommunications industry. In the 1960s, we earned a reputation as a 'Tomoegawa of Specialty Paper' by developing papers for multiple industries, with our strength in integrated production from wood pulp. Since then, TOMOEGAWA has developed "papermaking, coating, adhesive, powder" technologies and expanded its business domains to "highly functional materials." In recent years, with the spread of 5G, advanced driver assistance systems, etc., and the promotion of DX, many electronic parts require control for high voltage, high current, high frequency. TOMOEGAWA has expanded our "iCas" brand products that control "heat, electricity, and electromagnetic waves" to produce various solutions for heat, noise, etc. TOMOEGAWA has also formed “GREEN CHIP” brand, focusing on new products that contribute to the conservation of the natural environment and control of manufacturing and operating environments. In addition, we have changed our company name from TOMOEGAWA Co., Ltd., to TOMOEGAWA CORPORATION on January 1, 2024, in order to clarify the actual situation of our company and aim for sustainable corporate growth.


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