| Although low temperature evaporation has been utilised
for many years, it was the push to organic electronic thin films which
has popularised the technique (OLTE). Carbon reduction and the quest for
alternative energy sources and low power devices at low manufacturing
cost has been a catalyst for thin film exploration in the organic area.
Organic light emitting diodes ( OLED's) and organic solar cells have
been two major drivers in the popularity of the technique.
The LTE1 and LTE10 low temperature evaporation sources have been
specifically designed with the researcher and pilot line developer in
mind. The device is compact, temperature stable under operating
conditions making for tight deposition rate control. The design is
modular which allows for the quick removal and strip down of the source.
Replacement crucibles, heater element, thermocouple and stand-offs can
be done with minimal downtime.
The PID loop heater controller uses industry standard temperature
controls and software interface.
single channel LTE power supply and control unit - rear panel
4 channel LTE power supply and control unit - front panel
4 channel LTE power supply and control unit - rear panel
Images and data below courtesy of Professor M Turner and Dr J Kettle
University of Manchester, UK
Figure1 : Atomic Force Microscope (AFM) image
showing the morphology of a 50nm pentacene film deposited using
Moorfield’s LTE source.
Figure 2: Schematic of an Organic Field Effect
Transistor (OFET) and transfer characteristics of the device
Figure 3: Example of variation in deposition rate
from a target of 0.5Ås-1 using the LTE source for a 50nm
film. Deviation from the target rate remains less than 5% for the
duration of the deposition.
|
