In the emerging organic semiconductor/OLED
markets there is a need for valved evaporators capable of rapid flux
change. The first available evaporator from Oxford Applied Research, model
ORG50V, has a 50cc capacity. The design, incorporating a patented
in-line valve, eliminates the thermal inertia of conventional un-valved
evaporators and additionally conserves feedstock during bakeout. The
evaporant flux can be changed in seconds over a wide dynamic range and
beam profile tailored to the user’s requirements - from pencil beam to
large area shower head configurations. The K-cell section is
conveniently loaded externally with liquid/solid feedstock without
disturbing the valve and beam-outlet head. Scale-up to higher cell
capacity can be readily achieved.
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