In an embodiment of the invention, there is provided a method of making a heat exchanger core component comprising the steps of generating a stereolithography file from design data, slicing the stereolithography file into two-dimensional patterns, repeating the two-dimensional patterns sequentially to produce a three-dimensional core component, and depositing at least one layer of a material having a high thermal conductivity onto a top surface of a base. In another embodiment there is provided a heat exchanger core component made by an embodiment of the method wherein the core component comprises a triply periodic design that is repeated in three dimensions.