Disclosed is a steel for machine structural use having good machinability and chip-breakability as well as a method of producing the steel. The portable electronic device comprises a main body and at least a thin film pattern. The SMIF pod outlet port, which also includes a check valve and filter assembly, is connected with an evacuation system. The third grounding plate connected between the second and fourth grounding plates is substantially perpendicular with the second and fourth grounding plates.