a method of producing a relatively - thick film of a magnetic material on a substrate for use in microwave and millimeter wave devices is disclosed . the method includes preparing a wet paste comprising a binder material , glass frit , and a finely - grained magnetic material ; applying the wet paste over a stencil , template or mask disposed on the substrate , to form a film on a surface of the substrate ; drying the wet paste within an applied magnetic field , to vaporize fluid and organic compounds in the binder material and to produce a desired magnetic orientation in the magnetic film ; and sintering the magnetic film . hot pressing the magnetic film during sintering by adding weight on the film improves density .