Patent ID: 6505680
Filing Date: 2003-01-14
Classification: H01L

Abstract:
A cooling device for dissipating heat from a component, comprising:a heat mass including a boss having a convex arcuate surface profile and a groove surrounding the boss and having a concave arcuate surface profile, the groove and the boss are symmetrically positioned about an axis of the heat mass; a heat conductive base in contact with the heat mass and including a mounting surface adapted to contact the component; a plurality of vanes in contact with the heat mass and spaced apart to define a primary slot therebetween and extending to the heat mass, the vanes have a surface area that increases in a radially outward direction from the axis, the vanes including a top face, an aerodynamically profiled inner wall including a first portion extending from the groove and terminating at a second portion that extends to the top face, the inner walls of the vanes defining a chamber that surrounds the groove, an outer wall having a surface profile that widens from a bottom of the heat mass to the top face and includes therebetween a smooth curved portion, a draft portion, and a smooth radially outward portion, and the vanes including at least one secondary slot extending through a portion of each vane to define a plurality of fins in each vane; and wherein an air flow entering the chamber exits through the primary slots and a bottom portion of the secondary slots in an exhaust flow that dissipates heat from the vanes and the fins, the exhaust flow creates a low pressure region within the chamber that induces an intake flow into the chamber through the secondary slots and a top portion of the primary slots thereby dissipating heat from the fins and the vanes, and the low pressure region induces a surface flow along the first and second portions of the inner wall so that the surface flow passes over the groove and the boss to dissipate heat from the heat mass.