| 摘要 |
PURPOSE:To prevent the exfoliation of a conductive material from a substrate by printing the conductive material which forms a wiring through intermediary materials on a substrate into a required form. CONSTITUTION:A printed wiring board 2 is manufactured by printing a conductive material which forms wiring 6 through intermediary materials 12 on a substrate 4 into a required form. The intermediary materials 12 consist of raw materials where substances having the large strength of bond such as glue, dextrin, milk casein, nitrocellulose, phenol, and the like are mixed in the substances, for example, urethane, acrylic, nylon, epoxy resins and so forth and their resultant adhension is to be improved. These intermediary materials prevent the unfavorable property of the conductive material where shrinkage of material due to heat generated by soldering electric elements 8 develops. This treatment avoids some unfavorable problems such as the exfoliation of the conductive material from the substrate 4. |
