SUGOHIE(Microtexture)
Sugohie
“Sugohie” is a surface technology that improves heat transfer coefficient and heat dissipation/exhaustion in the near-infrared region (860 nm and above) by forming “micro-textures (μ-TEX)” specialized for heat dissipation properties.
We combine regularity and semi-regularity through design engineering to create prototypes and develop shapes suitable for customer requirements.
Advantage
Heat transfer through the topmost surface and interface
Micro-texture by design engineering
Approximately 90,000 to 200,000 microfins/㎠.
The surface area is two to three times larger.
Example of special shape plating
(convex 80μm, ditch 10μm)
Series of Sugohie
Comparison with other technology (Sugohie type1)
Technological Superiority
Micro-textured microprojectile shapes formed by laser processing or pressing have been reported to exhibit special heat transfer characteristics and improve the efficiency of heat dissipation and heat removal.*1)
Through the microtexture effect on heat sinks, heat transfer characteristics change. That is, when the proper microtexture is formed through wet plating, this is a surface treatment technology that alters heat transfer characteristics.*2) *3)
In addition, the industrial wet plating method enables instant and stable micromanufacturing on large areas and can be applied to large and small parts in a variety of shapes.
Boiling Heat Transfer Surface Model
*1) Japan Heat Transfer Symposium: Flow Boiling Heat Transfer in Mini-Channels Utilizing Micro-Protrusive Surfaces
*2) WCMNM 2021.Boiling Heat Transfer Control by Micro-/Nano-Texturing of Metallic Heat Spreading Devices
*3) WCMNM 2022. Manufacturing and Characterization of Acicular Fe-Ni Micro-Textured Heat-Transferring Sheets
Air Cooling Evaluation Test
Compressed air was sprayed on a sample placed on a hot plate, and the temperature of the sample was measured with a thermal camera. As a result, the temperature of the Sugo-Hie-treated sample was confirmed to be up to about 3 times lower than that of the untreated sample.
Aizawa T., Nakata H., Nasu T.: Manufacturing and characterization of acicular Fe-Ni micro-textured heat-transferring sheets. Prof WCMNM2022 (Leuven, Belgium; Sep. 21st, 2022) 2022: 277-281
Water Cooling Evaluation Test
On Sugo-Hie-treated surfaces, water boils in a shorter time due to the formation of microbubbles when boiling. The surface characteristics increase the heat of vaporization, resulting in a water cooling capacity 20-30% higher than that of untreated (smooth) surfaces.
