Osmium Coater.
An innovative alternative for high-resolution SEM electron microscopy imaging
Meiwafosis Co., Ltd. developed original discharging electrodes and released”Multifunction Coater” with sputter coating, plasma CVD and hydrophilic treatment features in 1997.
In 2021, the company successfully created the advanced osmium coating system “Tennant 20”.
The handle shape is suitable for opening/closing the lid, the angle of the screen is optimized for better digital communication, and the body is adjusted to smooth ampule handling. All details ensure easy operation and maintenance.
The Tennant20 is feedback controlled to stabilize the coating current to realize highly reproducible film deposition. The coating current is measured every 1/10000s and analyzed by a 32-bit microprocessor.
Based on PID control, the output of the discharge circuit is adjusted by calculating the coating power in order to reach the set input current value using a unique algorithm.
Ultrathin Film Without Charge-up
Even if a sample has a complicated structure, an Os conductive coating fully and deeply wraps around every side of the sample. Although it is a ultrathin film, there is no need to be concerned about charge- up in the electron beam.
Plasma CVD
Pure Os Metal Conductive Coating
By the plasma CVD method, osmium tetraoxide sublimation gas is introduced into the vacuum chamber and plasma is generated by DC glow discharge. During the process, the chamber is separated into two areas: „positive column“ and „negative glow phase“.
Features TENNANT20
| Model | Tennant20 |
| Chamber Dimensions | Ø150×70mm |
| Sample Stage / Capacity | Ø105mm Ø10mm×35, Ø15mm×10, Ø30mm×5 |
| Touch Screen | Yes |
| Vacuum Holding Function During OFF | Yes |
| Sublimation Cylinder, Open/close Detection | Yes |
| Automatic Exhaust Sequence | Yes |
| Vacuum Pump Volume | 3m³/h (50l/min) two stage rotary pump |
| Power Requirements | AC 230V/max. 5A / 100V/max. 10A (incl. vacuum pump start-up) |
| Max Power Consumption | 780W |
| Weight | 22kg |
| Dimensions of Main Unit | 390(L) x 385(l) x 435(H)mm |