IMAGE-FORMATION BY PHOTOLYSIS OF SILVER SALTS OF CARBOXYLIC-ACIDS

Various kinds of silver carboxylates are examined as the photosensitiv e material for forming a printed circuit pattern. These materials depo sit silver by UV photolysis and catalyze the electroless plating. From the viewpoint of sensitivity, film homogeneity, and thermal stability , disilver glutamate is revealed to have the most excellent performanc e. The sensitivity is improved by the chemical sensitizer of inorganic oxides. Zinc oxide is especially effective as a chemical sensitizer o f 100 times and provides an easy fixation. The ionization potential of carboxylate ion is concerned in the photosensitivity.