New Photographic Material for Printed Circuits

Recently a number of new photographic systems have been investigated with the object of replacing the conventional silver halide emulsions and as such could possibly represent the basis for further development of new methods of production for printed circuits. By using prepared combinations of metal and a light sensitive substance, e.g., arsenous sulphide/silver and cadmium iodide/tin, one can obtain directly a positive metal image. This approach by the authors was used for the development of a new direct positive photographic material for printed circuits which is easily processed and can be safely stored.