Abstract: A method for producing a coil element includes preparing a transfer mold having an inverse coil element pattern etched thereon, forming a peel-away film and an insulating film on the surface of the transfer mold in a superimposed manner, forming a resist film in an area having no inverse coil element pattern formed therein on the insulating film, removing by etching the insulating film with the resist film as a mask, after removing the resist film, filling up an area having the inverse coil element pattern formed therein and forming a central conductive film by first electroplating so as to slightly protrude above the insulating film, peeling the central conductive film from the transfer mold, and forming a surface conductive film by second electroplating with the central conductive film as a foundation and forming a coil element comprised of the central conductive film and the surface conductive film.

Abstract: A method for manufacturing a coil element including forming a groove in a substrate surface of a resin substrate, forming a metallic coating, forming a resist pattern being a reverse pattern of a coil element pattern on the surface to sandwich the groove, so as to have a thickness, forming a central conductive film of the coil element on the surface including the groove, by electroforming with the resist pattern as a mask, so as to have a height equal to or less than the thickness, removing the resist pattern and the exposed metallic coating forming a surface conductive film by electroforming with the central conductive film as a foundation, to form a coil element made of the central conductive film and surface conductive film, peeling away the coil element from the substrate, and removing a portion formed in the groove, of the central conductive film by reverse electrolytic etching.

Abstract: A spray coater having a nozzle for spraying a coating liquid, a heater, a slider mounting the nozzle and the heater, and capable of moving reciprocatorily in perpendicular two directions, and a substrate holder holding a substrate so that the surface faces downward with respect to the nozzle, the spray coater forming a thick film by spraying and applying the coating liquid to the surface of the substrate by the nozzle and then heating and drying the coating liquid by the heater, wherein an application of the coating liquid is carried out sequentially by a spray area, and the nozzle and the heater are arranged in parallel so that the drying to the spray area to which the application has been performed is carried out immediately after the application, thereby forming a flat thick film even on a large-sized substrate.

Abstract: A transfer mold that is used in production of a component by electroplating and has high workability and superior durability as well as a component produced thereby are provided. A method therefor includes the steps of forming a pattern of a desired component by providing a reverse pattern of the pattern of the desired component on a metal substrate and etching the metal substrate using the reverse pattern as a mask and treating the reverse pattern with heat or removing the reverse pattern and forming an insulation layer in a portion where the reverse pattern has been removed.