MANUFACTURE OF PRINTED WIRING BOARD

摘要

PURPOSE:To provide a printed wiring board wherein its mounting area is large and its cost is low by a method wherein a through hole which makes both faces of the wiring board conductive is formed in the same place as a land for mounting use. CONSTITUTION:A conductive ink 5 is buried in a through hole 4 which has been made in a double-sided copper-clad laminated board; it is hardened under a prescribed condition; after that, an electrolytic copper plating operation is executed to both faces of the double-sided copper-clad laminated board 1; copper-plated layers 6 are formed; after that, a circuit in which a land 7 for component mounting use is formed directly above the hardened conductive ink 5 is drawn on the copper-plated layer by using a dry film or an ink for circuit formation use; a circuit is formed by an etching operation or the like.