Here disclosed is an ink jet apparatus having an
ink-circulating/dispersing function. The apparatus provides ink with
dispersion as required, and circulates the ink through a tube to an
ink-collecting tank. During this circulation, a required amount of the
ink is fed to a printer head to form a predetermined pattern on a surface
of a substrate. By virtue of the circulating/dispersing function, the
apparatus can cope well with easy-to-aggregate ink having poor stability
in terms of printing, thereby protecting a printer head or an
ink-spouting section from clogging during ink jet printing. Such
stabilized ink jet printing contributes to manufacturing highly reliable
electronic components with an increased yield of products.