抄録
As resist ink for printed circuit boards, screen-printing type of ink was used mainly. As printed circuit boards getting denified and high-functional, photo-imageable type of ink has been increased in use. Liquid photo-imageable solder mask is main stream for industrial boards at present. UV curable screen-printing type of ink has the advantage in productivity and operation efficiency. It will play an important role constantly in the speed-up production line for consumer boards. Thermally curable type of ink has to be improved for aiming high functionality especially for adopting special properties which can not be obtained by using a operationally efficient LPI.
