The K950X High Vacuum Carbon
Evaporator will give continuous carbon films using carbon rod
evaporation, and with contamination-free turbomolecular pumping. It can
be used for support films and replicas in TEM and X-Ray analysis, and
conducting coatings for SEM.
The films are continuous for thickness of
2nm (20 Angstroms) or more and are free of significant structure.
The most common form of deposition is
from resistance heated carbon rods spectrographically pure. The rods are
shaped to achieve high current density with sufficient temperature to
cause evaporation. At this point the appearance being that of small,
bright, glowing particles of carbon. To achieve the required vacuum
condition of 1x10-4 mbar, requires the use of Diffusion or
Turbo Molecular Pumps.
The K950X comes with a Turbo Pump fitted
as standard, and is backed by a Rotary Vacuum Pump, the complete
sequence being under fully automatic control and the vacuum better than
1x10-5 mbar. A variable control is available to pre-heat and
outgas the rods, whilst the use of an instantaneous evaporate switch
allows burst evaporation under user control.
The Standard Rotary Specimen Table has
adjustable tilt, and can facilitate a range of specimen stubs. An
Optional Stage has a special recess to locate standard glass slides,
specifically beneficial for 'asbestos analysis' methods requiring carbon
coatings.
The unit comes complete with a Carbon Rod
Head fitted as standard. This is a 'Quick Release Head' to enable user
friendly fitting of any of the Optional Metal Evaporation, Carbon Fibre
and Aperture Cleaning Heads.
The normal venting is by restriction to
avoid specimen disturbance with the system being fully interlocked.
The Turbo pump can be mounted on any
axis, and can 'shutdown' safely to atmosphere.
Specifications of
the K950X Carbon Evaporator:
Instrument Case -450mm W
x 350mm D x 175mm H (Overall height with Work Chamber 750mm)
Work Chamber -Borosilicate Glass Overall Sizes 165mm D
x 125mm H.
Safety Shield -Polycarbonate
Aluminium Base -110mm Dia x 115mm H
Weight -28Kg
Carbon Source -3.2mm Dia. Rods
Rotating Stage -60mm Dia. Adjustable Tilt 0-90o.
Spacing to electrodes 130mm.
Vacuum Gauge -ATM - 1x10-2 mbar
Operating Vacuum -1x10-2 to 1x10-5
mbar
Ammeter Gauge -0-50 Amps
Low Voltage Select -0-5V-15V-25V
Outgas Current -0-25 Amps
Turbomolecular Pump -50L/Second
Services -Argon - Nominal 4psi.
Rotary Backing Pump -Two Stage Vacuum Pump No. 2,
35L/Min complete with Vacuum Hose & Oil Mist Filter. 2m3/Hr
Electrical Supply -230V 50Hz (8 Amp max. including
Pump)
-115V 60Hz (16 Amp max. including Pump)
