How was this made? (Aluminum Heat Sink - Mystery Manufacturing Method)

[Leav]

Originally Posted by JamesCH95

It is hard to tell from the pictures, can you try using a macro setting to get a clear picture of the fin root?

I couldn't since it's a camera phone, so I built a MacroScope from an old CD drive lens...
(Yes those are my LCD screen's RGB pixels I shot with it!)
Demonstration of magnification:
Outer CD case showing many small dimples.
Single dimple!

Also I cobbled together a work light.

It was impossible to stay focused on the details, so I had to make a video of the area you requested.

If that's not clear enough I could try to make a makeshift stand for it maybe? but with the limited depth of field (I think that's the term) with the CD lens, you can only see a very specific distance each time...


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Back on topic:
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If the fins were bonded on, how would that explain one side being smooth and the other not?

-Leav