Printed circuit board

The utility model provides a printed circuit board, contains insulation substrate and the printing is coated insulation substrate's electrically conductive line unit. Electrically conductive line unitincludes metal intermediate level and polymer coating, the cladding of polymer coating the metal intermediate level, and attach to insulation substrate. Borrow by the cladding of polymer coating themetal intermediate level can be protected the metal intermediate level makes the metal intermediate level is difficult for the oxidation. 种印刷电路板，包含绝缘基板及印刷涂布于所述绝缘基板的导电线路单元。所述导电线路单元包括金属中间层及高分子包覆层，所述高分子包覆层包覆所述金属中间层，并附着于所述绝缘基板。借由所述高分子包覆层包覆所述金属中间层，能保护所述金属中间层，使所述金属中间层不易氧化。