US Patent 9475156 Heat-dissipation unit and method of manufacturing same

A heat-dissipation unit includes a base and a plurality of radiating fins. The base has a plurality of grooves formed thereon, and each of the grooves has an open top and closed bottom. The radiating fins respectively have a heat-radiating zone and a bent zone. When a pressure is applied onto the bent zones, the bent zones respectively form an assembling section in the grooves to tightly fit therein. With the above arrangements, the radiating fins can be firmly locked to the base without the need of welding, so that the manufacturing cost is reduced and the problem of a damaged base due to assembling can be avoided. A method of manufacturing the above-described heat-dissipation unit is also disclosed.