Skived fin heat sink
A skived fin heat sink is fabricated by shaving metal into thin, closely - packed fins, greatly increasing heat transfer surface area for efficient cooling.
What is a skived fin heat sink?
A skived fin heat sink is a type of heat dissipation device that is widely used in various electronic and mechanical applications.With precise cutting tools, the top of a metal block (such as aluminum or copper) is cut into thin slices, and then these slices are folded back to a position perpendicular to the base to form a fin structure. This process can achieve a high fin density and a relatively thin fin thickness, thus optimizing the heat dissipation performance.
Different from some other heat sinks that require the fins to be connected to the base through methods such as welding or bonding, a skived fin heat sink is made from a single piece of material. This avoids the connection interface between the base and the fins, reduces the thermal resistance, and improves the heat transfer efficiency.
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Advantages of skived fin heat sink?
High Heat Dissipation Efficiency
With a high fin density and a large surface area, it can effectively increase the heat dissipation area and accelerate the transfer of heat from the heat source to the surrounding environment. Compared with traditional extruded aluminum heat sinks, it has better heat dissipation performance.
High Design Flexibility
The manufacturing process does not rely on expensive molds. Each fin is cut separately, Only a fixed width and height aluminum plate is needed to produce this type of radiator. By calculating the height and spacing of the fins, the desired thickness of the aluminum plate can be quickly determined for early preparationso it is easier to customize according to different application requirements
Good Cost-effectiveness
Since complex mold manufacturing is not required, the tooling cost is reduced. Especially for small batches of customized products, it has high cost-effectiveness.In terms of research and development design, it is possible to quickly make samples to verify the heat dissipation performance of the designed product, greatly reducing the research and development cycle and trial and error costs.
Some parameters of aluminum mateiral for making skived fin heat sink .
Material Parameters: 1060，6061，6063 aluminum alloy has medium strength, good corrosion resistance, and workability; these material are suitable for applications with high requirements for heat dissipation and structural strength.The higher the purity, the better the electrical and thermal conductivity of aluminum. Generally, the purity of the aluminum alloy used for heat sinks is above 99%.
Fin Height: Usually between 10 – 50mm. Increasing the height can enlarge the heat dissipation area, but it will be restricted by the available space, and being too high may lead to structural instability.
Fins thickness: Generally 0.1 – 2.0mm. Thinner fins can increase the number of fins and improve the heat dissipation efficiency, but being too thin will affect the strength.
Fin Spacing: Generally 0.1 – 110mm. The spacing needs to balance the heat dissipation effect and air circulation. If the spacing is too small, it will impede air flow, and if it is too large, the heat dissipation area will be insufficient.The height of a fin is generally proportional to its thickness.
When the maximum thickness is 2.0mm, the height can reach 110mm. If the thickness is 0.1mm, the maximum height is 10mm. Due to the shovel process, in terms of mechanical structure, the higher the height, the greater the verticality and curvature of the fin. However, overall, it is regular and does not affect the diffusion area of the heat sink.
Some parameters of copper mateiral for making skived fin heat sink .
Material Parameters:
Using high thermal conductivity copper C1100 or oxygen free copper C102 copper materials, copper fin heat sinks are generally used for chips with high power density. Currently, traditional server CPUs require this efficient copper fin heat sink. However, with the increasing power of service chips, this fin heat sink process is used to manufacture microchannels for liquid cooled plates.
Due to the characteristics of copper, the fin can be made very thin. Generally, we can achieve a thickness of 0.05mm and a spacing of 0.05mm. Currently, the thickness of the fin we produce is generally 0.1-0.2mm, and the height is 50mm. Generally, the height of the fin with a thickness of 0.1-0.2mm can be 15-20mm, and the fin thickness is 0.4-0.5mm, which can be achieved. The height is 45-50mm;
Copper has good corrosiveness and can resist oxidation and chemical erosion to a certain extent, which can extend the service life of skived fin heat sinks. At the same time, we can also do surface treatment for copper heat sinks, generally by passivating and nickel plating for oxidation resistance, or by painting or electrophoresis processes. The specific situation depends on the usage conditions, environment, and actual needs
Skived fin heat sink with heat pipes.
A skived fin heat sink is usually combined with heat pipes to greatly improve their heat dissipation performance. This is because the high-density area heating pipes of shovel fin radiators have high conductivity, and the combination of the two can play to their respective advantages, effectively improving the heat dissipation effect.
Efficient heat transfer: Heat pipes have extremely high thermal conductivity and can quickly spread heat evenly from the heat source to the heat sink base plate, greatly reducing the thermal resistance between the heat source and the radiator, improving heat dissipation efficiency, and then transferring it to the fins of the skived fin heat sink. Through forced convection of air flow, heat is transferred to the air.
Good temperature uniformity: The heat pipe can evenly distribute heat to the skived fin heat sink, avoiding local overheating and allowing the shovel fin radiator to fully dissipate heat, effectively reducing temperature fluctuations of the heat source.
High flexibility: Heat pipes can be bent and arranged according to the needs of actual application scenarios, which can better adapt to complex spatial structures and heat source distributions. It is convenient to optimize and combine with shovel fin radiators to achieve more flexible heat dissipation designs.
Provide customized skived fin process heat sinks for customers
With advanced skived fin production technology and stable production capacity, Walmate Thermal can provide customers with customized production services for skived fin heat sinks. Whether it’s precision heat dissipation components in the electronics field, efficient thermal management components in the automotive industry, or temperature control modules in medical equipment, they can all be precisely adapted. From requirement communication to solution design, and then to production delivery, we strictly control quality throughout the entire process, meeting the unique needs of customers in different fields with professionalism and craftsmanship.
