A jet dispensing print system for dispensing a liquid or viscous, jettable
substance as a pattern onto the surface of a PCB in an industrial
manufacturing PCB production line. The system includes a printing system
having a printing bridge system, that includes a static and rigid printing
bridge to accommodate in a precise manner several jet print heads, each
being fitted with a multitude of jet nozzles. The jet print heads are
utilized to achieve multiple redundancy whereby part of the total amount
of available nozzles are utilized as back-up nozzles. A printing table
positioned underneath the static and rigid printing bridge, accommodating
a vacuum table with area-addressable suction force, whilst the pattern is
dispensed in a jetting manner onto the PCB. A motorized system, for moving
the printing table simultaneously in two perpendicular directions. An
ink-supply system for supplying the several jet print heads with the
liquid or viscous substance. A control system responsive to the pattern
and PCB dimensional distortions for controlling the system in order to
achieve at desired registration precision level the dispensing of liquid
or viscous, jettable substance as the pattern onto the surface of the PCB,
and includes an user interface for providing a status report of the
printing system. The jet dispensing PCB print system is utilized for inter
alia, legend print, solder mask, etch resist mask, plating resist,
temporary (peelable) mask, adhesives, CSP and bare die encapsulation.
