DOUBLE-SIDED PRINTED-WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a double-sided printed-wiring board where a metal circuit is formed on both sides of a thin insulation layer, and the insulation layer at a central part has no crack or the insulation layer at an end part can not be lost. SOLUTION: In a double-sided printed-wiring board, metal circuits 4 and 4 are formed on both sides of an insulation layer 2 that is 0.03-0.1 mm thick as shown by (a). The metal circuit 4 is always formed at the same part on a surface at the opposite side of a part where the insulation layer 2 is exposed without forming any metal circuit 4 in the double-side printed-circuit board, and the metal circuit 4 is formed at least on one surface over the entire surface of the double-sided printed wiring board. Therefore, the metal circuit 4 is formed at least on one surface in any section in the thickness direction of the double- sided printed-wiring board.