What are stacked fin Heatsinks?

Stacked fins are assembled out of individual pieces stamped out of metal sheets, forming a dense interlocked fin array soldered to a copper or aluminum base. Stacked fins allow a wide range of shapes and very long fin blades, and can have heatpipes, heat columns and vapor chambers directly integrated into the fin array. Especially the latter feature has made this technology very popular in Laptops.

Advantages:
  • Can be manufactured with higher aspect ratios than folded fins
  • Large sizes of both fins and bases are easily accommodated
  • Fins and base can be made out of different materials
  • Interlocked fin design results in low handling cost
  • Allows more complex designs and circular fin arrays

Disadvantages:
  • Requires joints resulting in reduced thermal conductivity
  • More costly than extrusion
  • Some materials (aluminum) require nickel plating to allow soldering



Comparison
Die casting
Extrusion
Stacked fin
Folded fin
Skived fin
Cost
medium to low
low
high
medium
low
Tooling Lead-Time
long
short
long
long
medium
Weight
medium
heavy
light
light
medium
Performance
high
limited
best
medium
limited