| 摘要 |
PURPOSE:To manufacture a multilayer substrate having no void by forming gas vent holes at positions not used as a product of the substrate, thereby to smoothly vent gas. CONSTITUTION:In a manufacturing method for a multilayer substrate by laminating multilayer substrates 1, 1', prepregs 2, 2' and an inner layer substrate 3 and thermally pressing them, gas vent holes 5 are formed at the position not used finally as a product. Gas generated by heating forms voids 4, which are pushed to the end face of a material and gas vent holes 5. Since the holes 5 are formed, distances from voids to the end face of the material and the holes 5 are shortened to smoothly remove the voids 4. |
