| 摘要 |
PROBLEM TO BE SOLVED: To easily produce a cylindrical circuit body by making electroless plating catalysts meeting circuit patterns adhere to a thermoplastic type resin sheet and thermally deforming a sheet-like base material molded to a cylindrical shape, then subjecting this base material to electroless plating. SOLUTION: After the electroless plating catalysts are adhered according to the electric circuits on the surface of the film-like sheet, this sheet-like base material is molded to a cylindrical shape. Such cylindrical body is put into segmental dies having ruggedness of the required shapes on the inside surface and the top and bottom ends thereof are hermetically closed. The cylindrical body is then heated by a heater and compressed air is blown to form the deformed cylindrical body corresponding to the inside surface shape of the segmental dies and, thereafter, the cylindrical body is immersed into an electroless plating liquid and is subjected to electroless plating with metal, such as Cu, in the parts of the electroless plating catalysts, by which the cylindrical circuit body 19 having the circuits 21 consisting of the Cu on the inside surface 19a is easily produced. |
