PURPOSE: To facilitate a work of providing a conductive circuit on a board of a curved surface shape by providing the circuit on at least one side surface of the board made of heat resistant thermoplastic resin, and then drawing it.
CONSTITUTION: After a conductive circuit is provided on at least one side surface of a board made of heat resistant thermoplastic resin, it is drawn. A base material for a printed circuit board is formed of the resin. As concrete resin, resin having high moldability and excellent high frequency characteristic such as polyetherimide, fluorine resin, etc., can be suitably used. Several sheets of films made of the resin are laminated, metal foils such as copper foils are placed on the outermost layers of one or both side surfaces, and thermally press-bonded at a melting point or higher of the used resin to be integrated. A circuit is formed on the foil of the surface by using the obtained flat board, and then drawn to a curved surface shape to be finally required by using a circuit formed board. Thus, a circuit forming work on the board having a curved surface shape such as a parabolic antenna, etc., is facilitated.
NAGAMATSU KEIJI
SANO MITSUTOSHI
