公开(公告)号：US3650860A

公开(公告)日：1972-03-21

申请号：US3650860D

申请日：1968-08-22

申请人： BELL & HOWELL CO

发明人： ROLKER JOHN H JR

IPC分类号： H05K3/06 ,  H05K1/00 ,  B41N3/02

CPC分类号： H05K3/065 ,  H05K2203/052 ,  Y10S428/90 ,  Y10S428/901

摘要： Printed circuits are made by a method which applies a dissoluble magnetizable layer to the electrically conductive coating of a circuit board blank. A magnetic image of the desired circuit is provided in the applied magnetizable layer and etchant-resistive magnetic toner is attracted by the magnetic image to form an etch resist pattern. The electrically conductive coating is then etched with the aid of an etchant and the latter etch resist pattern.

摘要翻译： 印刷电路通过将可溶性可磁化层施加到电路板毛坯的导电涂层的方法制成。 在施加的可磁化层中提供所需电路的磁图像，并且耐蚀性磁性调色剂被磁图像吸引以形成抗蚀剂图案。 然后借助蚀刻剂和后一蚀刻抗蚀剂图案蚀刻导电涂层。