Owner's manual

Advanced Programming 7-57
7.10 Jet on the Fly
“Jet on the Fly” (JOF) technology is Nordson ASYMTEK’s fastest jetting method. With “Jet on the Fly”
technology, the DispenseJet pump can dispense lines of dots “on the fly” (without stopping). Unlike
traditional “Stop and Shoot” methods, lines are formed by shooting a series of dots without stopping at
each dot position.
Excellent results have been obtained jetting small-die underfill, no-flow underfill, and die attach patterns.
Dispense time is significantly reduced (application dependent) when compared to traditional needle
dispensing and traditional jet dispensing. “Jet on the Fly” technology is available on the Millennium
M-2000, Axiom X-1000, and Spectrum Series dispensing platforms and requires FmXP Version 4.5 or
higher. The “Jet on the Fly” feature can be activated by adding standard line commands in the FmXP
programming window.
7.10.1 JOF vs. Needle Dispensing
While “Jet on the Fly” technology is a major advantage for some applications, it does not replace needle
dispensing. New multi-chip modules have smaller gaps between dies, thus creating higher dispensing
restrictions. JOF technology is best for small die (< 5mm) where small fillets (< .5 mm) are required. JOF
technology is capable of dispensing faster and cleaner lines into these small areas.
7.10.2 JOF Advantages
The main advantage of “Jet on the Fly” technology is speed. Dispense speed can be increased
tremendously depending upon the application. The DispenseJet can dispense up to 100 shots per second.
Additional advantages include:
• Non-contact dispensing
• No required underboard support
• Reduction of up or down motion
• Creation of smaller fillets for capillary underfill than are possible with needle dispensing
• Freeing up of the wire bonding equipment for wire bonding applications
7.10.3 JOF Options
There are several different dispensing options that can be selected when using “Jet on the Fly.”
7.10.3.1 Continuous Path Method
In the continuous path method, the positioner does not stop at the end of each line segment and maintains
a constant velocity. This method is faster than the non-continuous path method and is excellent for
applications where speed is a priority.
7.10.3.2 Non-Continuous Path Method
In the non-continuous path method, the positioner stops at the end of each line segment, which results
in better line form since positions are checked at the start and stop points of each line. Additional
advantages include ease of adjustment and the ability to establish different line parameters for each
line segment.