Abstract: An indicator panel for an instrument includes a translucent resin substrate having a first face and a second face opposite to the first face, and a design film on the first face of the substrate. The design film includes a translucent portion through which a light from the second surface of the substrate is transmitted, and an opaque portion which does not transmit the light from the second face of the substrate. The design film is produced by jetting droplets of a UV hardening type colored ink to the first face of the substrate in an inkjet printing, and radiating ultraviolet rays for a time within one second from the jetting so as to harden a mass of the droplets, in which a volume of the droplets is equal to or less than 30 pl.

Abstract: An indicator panel for an instrument includes a translucent resin substrate having a first face and a second face opposite to the first face, and a design film on the first face of the substrate. The design film includes a translucent portion through which a light from the second surface of the substrate is transmitted, and an opaque portion which does not transmit the light from the second face of the substrate. The design film is produced by jetting droplets of a UV hardening type colored ink to the first face of the substrate in an inkjet printing, and radiating ultraviolet rays for a time within one second from the jetting so as to harden a mass of the droplets, in which a volume of the droplets is equal to or less than 30 pl.

Abstract: A circuit board is comprised of a metal plate, a printed circuit, and an electronic component. The metal plate serves as a base. The printed circuit is placed on one side of the metal plate. The electronic component is placed on the other side of the metal plate. The metal plate has an opening which reaches the printed circuit at the bottom of the metal plate. An insulating piece is inserted in the opening. The insulating piece has about the same thickness as the metal plate. A through-hole is made through both of the insulating piece and the printed circuit. A lead wire of the electronic component is extended through the through-hole and connected to the circuit pattern of the printed circuit by a conductive metal.