The 208C High Vacuum Turbo Carbon Coater from Cressington offers high quality carbon coating techniques for TEM, STEM, SEM, EDS/WDS, EBSD and microprobe applications. The compact, turbo pumped system requires only a standard power outlet and occupies minimal bench top space. The practical chamber size of 150mm diameter allows for rapid pump down and coating cycle times of around 10 minutes. The use of ultra purity carbon rods in a high vacuum chamber gives the high quality coating needed for critical TEM, EBSD, high resolution SEM and microprobe work. The modular design permits rapid change between a variety of application with optimized conditions. Optional accessories for the 208C are:
- Metal evaporation module for shadowing techniques can be mounted adjacent to the carbon source
- Dedicated EM aperture cleaning head
- Glow discharge head for cleaning TEM grids
- Auxiliary Power Unit to drive the Metal evaporation, Aperture cleaning and Glow Discharge accessories
- Rotary-Tilting stage for TEM shadowing techniques or coating large sample like microscope slides for carbon support films
- Rotary-Planetary-Tilting stage for multiple sample coating for SEM, EDS/WDS and EBSD application and/or enhanced uniformity
- MTM-10 thickness monitor unit for precise and reproducible coating thickness
Main Features of the 208C
- Voltage controlled rod source give multiple evaporation capability
- Feedback loop enables precise and consistent coating thickness
- Choice of operation methods for optimized operation
- Automatic evaporation control gives ease of use on busy environments
- Low cost, high resolution thickness monitor ensures reproducible results
- 80 l/sec turbo pump on a 150mm dia chamber gives rapid pumpdown
- Optional Dry Scroll Pump available
- Reduces operating cost in several ways:
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- No need for water cooling
- No need for warm up or cool down
- No need for LN2 (dry nitrogen gas optional)
- Short cycle time
- Space saving, compact bench top design
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Carbon Evaporation Supply
The 208C uses a unique fully integrated electronic feedback-controlled power control for the rod-fed Bradley type Carbon evaporation source. Current and voltage are monitored by sensor wires in the evaporation head where the evaporation source is part of the feedback loop. This feature gives the conventional rod-fed carbon source unusual stability and reproducibility. The carbon source uses two-step ultra pure carbon rods. The evaporation source can be operated in manual "pulse" or manual "continuous" modes. The pulsed mode, when used in conjunction with the optional MTM-10 high resolution thickness monitor, gives absolute control over the desired thickness of the carbon coating. The automatic mode lets the user set the voltage and time, which together with the two-step rods gives consistent coating combined with ease of operation.
208C Specimen Chamber
The modular design of this practically sized chamber accepts a range of attachments which can be readily implemented. The telescopic pillar gives a simple, rapid adjustment from long to short working distances to change the evaporation rate. The unique standard HIGH-VAC / LOW-VAC pressure adjustment system utilizes a precision needle valve. HIGH-VAC is used for highest quality carbon films such as for TEM applications. LOW-VAC is used for Glow Discharge cleaning of TEM grids or for carbon coating of highly topographic SEM specimens. For SEM, EDS/WDS and microprobe analysis applications, the Rotary-Planetary-Tilting stage with variable speed, adjustable tilt and 4 specimen holders ensures uniform coating on multiple samples. The Rotary-Tilting stage is specifically designed for TEM applications and holds a 25x75mm (1" x 3")glass slide. Both stages are mounted on a mounting collar and can be readily implemented in the chamber.
* The High Vacuum Turbo Coater includes: Microprocessor based, feedback controlled power supply with vacuum safety interlock; Automatic and manual evaporation control; Digital timer/voltage setting display; Analog vacuum and Amps display; Fully integrated all-metal vacuum pumping system with 80 l/sec. turbo pump on ISO 63 flange and a 2 cu. m/hr. rotary pump, mounted on an anti-vibration table, stainless steel flexible vacuum hose and QF16 connection system; High/low vacuum metering system; Precision needle valve with switched “no leak” mode; Glass chambers: 150mm dia. x 150mm H and 150mm dia. x 65mm H; Telescoping top plate support; Rapid source offset adjustment; 10 preshaped carbon rods; Operation manual.
Ted Pella, Inc has been an authorized distributor for the complete range of Cressington vacuum coating systems for over 15 years. Cressington Scientific Instruments Ltd, based in Watford, UK develops, designs and manufactures vacuum coating systems for scanning electron microscopy (SEM), transmission electron microscopy (TEM) specimen preparation and thin film research applications. Core competencies of Cressington are vacuum technology, DC magnetron sputtering technology, electron beam evaporation technology for EM, cryo technology for EM and thermal evaporation. The Cressington products range comprises 108 series sputter coaters for standard SEM sample coating, the 108 series carbon coaters for standard EDX coating, the 208HR for field emission SEM (FESEM) sample coating, the 208C high vacuum turbo carbon coater for TEM/EBSD/microprobe carbon coating and the 308UHR and 308R-EM for ultra high resolution sample coating. The 308R vacuum coating system for thin film applications is based on a compact versatile advanced pumping station which accommodates sputtering, thermal evaporation and electron beam evaporation all in a 12" light weight stainless steel chamber. Cressington takes pride in building products which have excellent quality, are compact bench-top systems and are easy to use.
