I recently come across several items employing a special type of heat sink structure .
Usually I see plate fin heat sink or pointy fin heat sink, they all have fins that are uniformly distributed.
Like this(Wakefield-Vette 655-53AB)
or this (Wakefield-Vette LTN20069)
But the ones listed below, however, have a non-uniform fin structure that I assume there should be some reasons behind.
Does there anyone here happen to know what's the name, origin and mechanism behind this kind of structure?
A CPU heat sink,
a high power radio device,