20130319064 | HEAT SINK FABRICATION METHOD - A heat sink fabrication method includes the step of heating aluminum billets into malleable aluminum and then extruding malleable aluminum into an aluminum substrate bar having different lengths of fins radially spaced around the periphery thereof, the step of using a machine to transversely cut the aluminum substrate bar into multiple aluminum substrates subject to a predetermined thickness, and the step of employing a stamping technique to stamp each aluminum substrate into a heat sink having radiation fins extended from and spaced around a plate-shaped base portion thereof. | 12-05-2013 |