| 摘要 |
PURPOSE:To form an electric circuit in which types of using chemicals are reduced by roughing an exposed surface of a primarily molded form of easily platable resin by sand blasting after secondary molding is finished, and electrolessly plating it after cleaning it. CONSTITUTION:After easily platable resin 1 mixed with electrolessly plating catalyst is primarily injection molded, hard platable resin 2 not mixed with the catalyst is so secondarily injection molded that part of primarily molded form of the resin 1 is exposed and its exposed surface becomes a predetermined electric circuit pattern 3. After the secondary injection molding is finished, the exposed surface of the resin 1 of the secondarily molded form is roughened by a sand blasting method by using abrasive particles. Thus, surface unevenness of the exposed surface of the resin 1 is increased to increase its surface area. Then, when it is electrolessly plated after cleaning, adhesive properties of the electric conductor film 3 with the resin 1 is improved. Accordingly, types, using amounts of chemicals to be used are decreased, safety is improved, and a manufacturing time is shortened. |
