| 摘要 |
PURPOSE:To improve adhesion strength of epoxy resin and a copper foil by using epoxy resin having three or more epoxy radicals in one molecule and by attaching a silane coupling agent to an oxidized surface of an inner layer copper foil. CONSTITUTION:Silane coupling agent is attached to a rough side of copper foil. A mixture of epoxy resin which includes epoxy resin having three or more epoxy radicals in one molecular at least 10wt.% and a prepreg are laminated between two sheets of copper foil. The lamination is heated, pressurized, and cured to acquire a lamination whose both sides are coated with copper. Then, after specified pattern etching is applied, it is immersed in black oxidation treatment solution to carry out oxidation treatment to a lustrous side of the copper foil. Furthermore, after the lamination is immersed in water solution of silane coupling agent, the prepreg and the copper foil are laminated up and down. Thereafter, heating, pressurizing and curing are carried out to acquire a four-layer copper coated laminated board. Thereby, it is possible to improve adhesion of epoxy rein and a copper foil and to improve reliability of a fine pattern such as a high density printed substrate. |
