| 摘要 |
PROBLEM TO BE SOLVED: To provide a drilling method by which holes can be drilled in a short time with high productivity, and to provided a method of manufacturing a printed wiring board using it. SOLUTION: In this drilling method, holes are drilled through a laminated board, composed of a resin and metallic foil by projecting a carbon dioxide laser beam upon the laminated board from the metallic foil side. In the method of manufacturing the printed wiring board, a metal foil with resin in integrated with an inner-layer circuit board having an inner-layer circuit by pressing the foil against the circuit board by heating after the foil is laid on the circuit board and a hole reaching an inner layer is made. Then the inner layer is connected electrically to the metal foil and an outer-layer circuit is formed by machining the metal foil. At drilling of the hole reaching the inner layer, a carbon dioxide laser beam is irradiated upon the laminated board composed of the resin and metallic foil from the metal foil side. |
