Patent ID: 7539017

Claim:
A heat dissipating device comprising: a heat sink ( 3 ) including a base ( 30 ) having an upper surface ( 31 ) which is tapered and inclined from four corner areas ( 32 ) thereof toward a middle portion thereof with the middle portion being higher than edges thereof, the heat sink ( 3 ) includes four posts ( 34 ) extended from the four corner areas ( 32 ) thereof respectively, and each having a hole ( 35 ) formed therein for receiving or threading with fasteners ( 37 ) respectively; a cusp ( 33 ) on a middle portion of the base ( 30 ) and the upper surface ( 31 ) of the heat sink ( 3 ); a fan device disposed on tops of the posts ( 34 ), and secured to the posts ( 34 ) of the base ( 30 ) with the fasteners ( 37 ), and including one or more fan blades or a fan member ( 41 ) disposed in the middle portion thereof, and thus supported above the middle portion of the upper surface ( 31 ) of the base ( 30 ); a number of rods ( 38 ) extended upwardly from the upper surface ( 31 ) of the base ( 30 ), and arranged between the posts ( 34 ); the rods ( 38 ) including a curved upper surface ( 381 ) formed on an upper portion ( 382 ) thereof; the rods ( 38 ) each including a lower portion ( 383 ) having a greater outer diameter than that of the upper portion ( 382 ) thereof, in order to further increase the outer surface area of the rods ( 38 ); each rod ( 38 ) being dependent from the cusp ( 33 ) and being embedded into the cusp ( 33 ); and the rods ( 38 ) that are located closer to the four corner areas ( 32 ) of the base ( 30 ) include a greater height, and the rods ( 38 ) that are located closer to the middle cusp ( 33 ) of the base ( 30 ) including a smaller height, such that a concave recess ( 39 ) is formed in by the upper portions of the rods ( 38 ).