| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed wiring board in which a plating agent for forming a conductive body in an internal wall of an end surface through hole can enter sufficiently into the end surface through hole. SOLUTION: In a printed wiring board, an end surface through hole is formed on an end surface of a substrate forming a circuit pattern so as to perforate the end surface and one surface, respectively, and have a bottom to form a non-penetrating state in a thickness direction of the substrate. The closed-end hole is formed with a conductor electrically connected to the circuit pattern, and the closed-end hole is formed by either a sandblast processing or a photo-via method. COPYRIGHT: (C)2003,JPO |
