Skived Fin Heat Sinks

Skived fin heat sinks offer highly optimized cooling as they allow for higher fin densities but do not have an interface joint where heat transfer could be impeded. Unlike bonded or brazed Heat Sinks, Skived Heat Sinks are constructed from a single piece of material and therefore have no thermal resistance between the base and the fins. They are manufactured by precisely slicing the top of the base and folding it back and repeating at regular intervals to create the fins.

The skiving process enables high fin density and thin fin heat sink geometries which provide optimal thermal performance. By packing as much fin surface area into a given volume, skived fin heat sinks have greater heat transfer than other single piece construction heat sinks such as extruded aluminum heat sinks. Compared to extruded aluminum, skived fin heat sink fabrication does not rely on expensive tooling which provides greater design flexibility. Instead, each fin is cut separately using the same tool which allows for lower tooling costs.

Additionally skived heat sinks can be constructed of aluminum or copper allowing for full, one-piece copper solutions for high performance cooling. Aavid standard copper skived fin heat sinks are available with Shurlock pin attachments for reliable mounting and easy assembly.

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Benefits/Features

  • Saves on Tooling Costs
  • Enables Solid Copper Solutions
  • Improved Thermal Performance

Product Capabilities:

  • Materials:
    • Aluminum
    • Copper

  • Dimensions:
    • Aluminum:
      • Fin Thicknesses: .012 - .039 in. (.3 – 1 mm)
      • Max Flow Length: 8.163 in. (200 mm)
      • Max Height: .408 - 2.449 in. (10 – 60 mm)
      • Max Fin Gap: .016 - .020 in. (.4 - .5)
    • Copper:
      • Fin Thicknesses: .006 - .030 (1.5 - .75mm)
      • Max Flow Length: 5.906 in. (150)
      • Max Height: .394 – 1.575 (10 – 40)
      • Max Fin Gap: .008 - .020 (.2 - .5)
    • Max Fin Density: 50+ fins per inch

    Design Guidelines

    • Airflow lengths limited by cutter
    • Fin thickness from 0.008”
    • Aluminum is ideal material choice
    • High aspect ratios (aluminum)
    • No filler material

    Design Notes and Recommendations:

    • Since heat sink is fabricated from a single piece, fins and
    • basehave no interface resistance
    • Aluminum offers higher aspect ratios
    • Manufacturing process enforces a tradeoff between all fin
    • dimensions