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Asymtek Intros Slider Valve for Solder Paste
April 24, 2008 |Estimated reading time: 1 minute
CARLSBAD, Calif. Asymtek, a Nordson company, launched the SV-100 slider valve for solder paste dispensing. It is reportedly up to 20% faster than standard auger dispensers, and achieves 20,000 dots per hour (on 1-mm grid). For solder paste types 4, 5, and 6, it is said to deliver accurate and repeatable dots of less than 300 µm. Dots as small as 125 µm in diameter can be achieved with type 6 paste.
The slider valve can be used to selectively dispense into small and inaccessible places where it is difficult to screen print. The SV-100 dispenses dots and lines of pastes and fluids that contain metal additives with minimal clogging, designed to eliminate problems seen with traditional needle dispensing. The SV-100 is compatible with lead-free and no-clean solder pastes as well as silver-filled epoxies. The SV-100 targets production of solder paste dots for passive components smaller than 0603, rework of BGA and QFN electrical connections, lines and patterns for RF shield attach, low-volume/high-mix applications, and unique patterns of conductive epoxy.
Slider valve technology uses high-frequency, piezoelectric-drive actuation to quickly deposit small dots of thick fluids. Lever action aligns valve seats to open a smooth path for fluid flow. Within milliseconds, the holes are forced out of alignment to stop fluid flow and a dot is formed. It is designed for use with Asymtek's DispenseMate, Spectrum 8xx, and Axiom dispensing systems.
For more information, visit www.asymtek.com.