US Patent 7843696 Heat sink assembly

A heat sink assembly includes a heat sink main body and a contact member attached to a base of the heat sink main body. The contact member includes a container with thermal grease contained therein and a movable cover movably attached to the container. The container includes a bottom plate configured to contact a heat generating component, and a plurality of holes defined in the bottom plate. When the heat sink is attached to the heat generating component, the movable cover is pressed towards the container and impels the thermal grease out from the holes to spread the thermal grease between the bottom plate of the container and the heat generating component.