| 摘要 |
<p>Labile electrostatic images corresponding to the required conductive patterns on each side of a required printed circuit board, having components on one side and a wiring pattern on the other side, are formed, electrically conductive powder (27) is applied to the images and the resulting powder pattern is transferred by printing onto an insulating sheet (FSI-FS2). The resulting sheets are applied onto each face of a rigid support and the sheets carried by the support (SR) are treated to enlarge the tracks of conductive material and the support is mechanically worked in the conventional manner to give the board its final shape.</p> |
