A method of manufacturing a
Printed Circuit Board (PCB) wherein an
inkjet printing step is used, characterized in that in the
inkjet printing step a
radiation curable inkjet ink comprising an adhesion
promoter having a
chemical structure according to Formula I is jetted and cured on a substrate, wherein X is selected from the group consisting of O and NR3, L1 and L2 independently represent a
divalent linking group comprising from 2 to 20 carbon atoms, R1 is selected from the group consisting of
hydrogen, a substituted or unsubstituted
alkyl group and a substituted or unsubstituted
aryl group, R2 is selected from the group consisting of a substituted or unsubstituted
alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aralkyl group and a substituted or un-substituted (hetero)
aryl group, R3 is selected from the group consisting of
hydrogen, a substituted or unsubstituted
alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aralkyl group and a substituted or unsubstituted (hetero)
aryl group, n represents an integer from 0 to 4, any of L1, L2 and R2 may represent the necessary atoms to form a 5 to 8 membered ring.