Patent ID: 7532468
Filing Date: 2009-05-12
Classification: F28F,H01L

Abstract:
1. A heat sink comprising: a thermally conductive base having a top surface and a bottom surface configured for being attached onto a heat-generating electronic component; a plurality of parallel thermally conductive fins extending from the top surface of the base with channels being formed there between, each of the fins being generally rectangular with the top edge being shorter than the bottom edge, each of the fins comprising an upright side edge perpendicular to the top surface of the base, and an opposite streamlined side edge, the upright side edges of the fins cooperating with the channels to form an air inlet for airflow flowing into the channels, the streamlined side edges of the fins cooperating with the channels to (ann an air outlet for airflow flawing out of the channels; and a guiding member being attached at the streamlined side edges of the fins and extending sway from the streamlined side edges configured for guiding airflow flowing out of the channels, the guiding member being in parallel to the top surface of the base; wherein the fins substantially decrease from adjacent the air outlet to the distal end of the air outlet along longitudinal directions of the fins, thereby forming the streamlined side edges; a cutout is defined at the streamlined side edge of each of the fins, bottom edges of the cutouts cooperatively form a cutout surface parallel to the ton surface of the base, and the guiding member is supportedly attached on the cutout surface.