An Extruded Heatsink uses the Extrusion manufacturing process where the material is pushed through a die of the desired cross-section. A good video of the extrusion process can be found at this link. An Extruded Heatsink can have very complex cross-sections, and use materials that are brittle. The extrusion forms parts with an excellent surface finish, and are ideal for additional surface treatments such as Anodizing, or plating. Radian uses high thermal conductivity aluminum alloy A6063 200 W/(m-K) which most heatsink manufacturers do not use as it is “gummy” and difficult to work without a good process recipe. An Extruded heatsink is suitable for high volume production as it has a relatively low NRE. The molds are typically made with an EDM wire machine, and the Tooling lead time is typically 4-6 weeks. The most cost-effective when post-machining is not required as additional CNC machining may relieve the stress, causing misshape. This can be minimized by special thermal treatment to limit failures due to stress. Extruded Heatsinks offer both thin fins, and aspect ratios of ~8:1 which offers optimal heatsink performance. You can select standard size of aluminum heatsinks available in our portfolio as raw or anodized versions. You may contact us to produce your own design as well as we can design and produce for you to provide the best cooling solution for your machines. We support clients on heatsink design, thermal resistance calculation and optimum solutions for the client to meet their expectations on designed machines for best performance.