| 摘要 |
PURPOSE:To make uniform the thickness of a copper plate by controlling the flowing-out of resin to the outside in laminating a prepreg by providing a resistance part against a resin flow on the outer circumference of the copper plate. CONSTITUTION:A relief hole 11 is provided in a copper plate 1 at a necessary portion of the same, and resistance part 2 against a resin flow is formed on the circumferential part of the copper plate. The resistance part 2 is configured into a shape having protruded stripe 21 formed on the circumference of the copper plate 1, or in a shape where many 1-2mm horn-shaped protruded part 22 is formed on the circumference of the copper plate 1 and has roughness on the surface of that part, or into a shape where mesh-shaped protruded part 23 is formed on the circumference of the copper plate 1. Hereby, a resin flow is prevented from flowing out in laminating a prepreg 3 to make uniform the thickness of the copper plate. |
