Seasonic is working on 'solid state heatsinks' for power supplies

Seasonic wants to equip its power supplies with heatsinks, which the company calls OptiSink Design. These should replace traditional heatsinks, to which Mosfets are screwed, and should cool those Mosfets better.

The first power supplies with this technology should be models from the cheaper Focus and Core series. With the OptiSink Design heatsinks, Seasonic wants to simplify the production process of the power supplies, reduce manual labor costs and, most importantly, improve cooling efficiency. OptiSink Design uses a copper-plated PCB, which serves as a heatsink, instead of a traditional metal heatsink. The mosfets of the power supply must be screwed onto that 'old-fashioned' heatsink with a layer of thermally conductive paste with glue in between. That process is manual and difficult to get consistent. Sometimes a screw can be tightened harder and more or less paste can be used.