INFICON Cool Drawer Single Sensor - Manual (Page 47)

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Cool Drawer Single and Dual Sensors Operating Manual
4.3 General Precautions
4.3.1 Handle the Crystal with Care
Wear clean nylon lab gloves and use clean plastic tweezers when handling the
crystal. Handle the crystals only by their edges.
Anything that comes in contact with the crystal surface may leave contamination,
which may lead to poor film adhesion. Poor film adhesion will result in high rate
noise and premature crystal failure.
CAUTION
Do not use metal tweezers to handle crystals. Metal
tweezers may chip the edge of the crystal.
Poor thickness
reproducibility. Erratic source emission
characteristics Move sensor to a different
location; check the
evaporation source for
proper operating conditions;
ensure relatively constant
pool height and avoid
tunneling into the melt.
Use multiple sensor option if
available on controller.
Material does not adhere to
the crystal. Check the cleanliness of the
crystal surface; evaporate an
intermediate layer of proper
material on the crystal to
improve adhesion. Use silver
or gold coated crystals, as
appropriate.
Table 4-1 Symptom, Cause, Remedy (continued)
SYMPTOM CAUSE REMEDY