| 摘要 |
PURPOSE:To obtain a circuit in a complicated and fine shape easily and yet obtain easily-manufacturable junction blocks, by making circuit patterns and terminal forming sections in one body with an insulating board and providing conductive coatings on the circuit patterns and terminal forming sections. CONSTITUTION:An insulating board 1 and circuit patterns 2a-2c are formed in one body with a synthetic resin material by the first shot of injection molding. As a synthetic resin material, polyester sulfone etc., for example, with a catalyzer for electroless plating is used. The circuit patterns 2a-2c can be made freely into more complicated and finer shapes by cutting desired circuit shapes in a metal mold beforehand. Besides, the circuit patterns 2a-2c and tab terminal forming sections 3a-3d can be made in one body. Then, the face and rear of the insulating board 1 are coated with synthetic-resin-made insulators 7 by the second shot of the injection molding, and the circuit patterns 2a-2c and tab terminal forming sections 3a-3d are electroless-plated (8). This makes it possible to obtain complicated and fine circuits easily and yet makes it possible to manufacture multi-layered circuits easily. |
