| 摘要 |
PURPOSE:To facilitate rust-proof treatment, by applying the printing deposition of a resin paste to the cut end surface of a metal plate such as a printed wiring board by using a metal mask equipped with an opening corresponding to said end surface. CONSTITUTION:When a silicon steel plate with a thickness of 1.0mm is used as a printing wiring board utilized as the printed circuit board of electronic machinery, wiring layers 3 by the cladding of a copper foil with a thickness of about 35mum are formed to the surface part of a metal plate 1 in a desired pattern through an insulating resin layer with a thickness of 50mum and the coated metal plate 1 is cut into a definite dimension to expose the side end surface 4 thereof. After the metal plate 1 is fixed to a mount stand 5, a metal mask 8 is superposed to supply a resin paste 10 through the opening 9 thereof to deposit a resin layer 11 to the end surface 4 of the metal plate 1. By this method, a resin layer having good uniformity is formed and rust-proof effect is enhanced. |
