A cooler includes a heat conducting member and a heat scattering member.
The heat conducting portion is closely attached with a heat source. The
heat scattering member has plural hollow cones respectively formed of
sintered metallic particles with their size enlarged gradually from the
bottom to the top. The metallic particles closer to the surface of the
heat conducting member are smaller, having a greater contact area to
transmit the heat more effectively. And, plus the ventilation of a fan on
the heat scattering member, the air in the hole of the hollow cone is
expelled out, so the air outside the hollow cone flows into its center
through the porosities between the metallic particles, enabling the
metallic particles of the hollow cone to increase the contact area with
air for a better thermal release.