| 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 a rough side of the copper foil. CONSTITUTION:A copper foil whose lustrous surface is masked is immersed in acetic aqueous solution such as beta-(3,4-epoxycyclohexyl)ethyl trimethoxy silane to attach silane coupling agent to a rough side of the 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. Accordingly, it is possible to improve adhesion of epoxy resin and a copper foil and to improve reliability of a fine pattern such as a high density printed substrate. |
