US Patent 11686537 Heat exchangers and methods of manufacturing the same

A method of manufacturing a heat exchanger is provided. The method includes forming a first substrate by additively manufacturing a body defining a first outer surface and a second outer surface opposite the first outer surface, a first partial fluid flow channel formed within the first outer surface, a second partial fluid flow channel formed within the second outer surface, and at least one internal fluid flow channel completely formed within the body, and coupling the first substrate to a second substrate including a partial fluid flow channel formed within a surface of the second substrate such that the first partial fluid flow channel of the first substrate and the partial fluid flow channel of the second substrate combine to form a combined fluid flow channel.