Reactaflo PDS-2 Single Channel Reactive Sputtering Process Controller

System Description
The Reactaflo system is installed as follows: The Piezo Valve and Mass Flow Sensor are connected into the reactive gas line. The sight tube is installed inside the vacuum system, at a position where an adequate optical signal can be obtained from the plasma. The special construction of this tube almost eliminates loss of signal because of material depositing on the fibre optics. The vacuum feedthrough is bolted into a convenient hole and the other end of the fibre optic cable is mounted on the monochromator. All elements are connected by screened cable to the Reactaflo controller. The controller has three segments. The main segment provides for selection (and display) of optical emission set point and Photomultiplier voltage (i.e. sensitivity). Adjustments are provided to accommodate differing system time constraints. A green / red LED indicates control status. The second segment displays the actual flow rate of reactive gas. Diagnostic LED's make up the third segment.

Applications
Reactaflo is adaptable to all reactive sputtering processes whether single or multi-cathode, R & D or industrial-scale.

Materials
Detailed experience has been obtained with the following materials, but the possibilities are practically endless: ITO, TiN, SnO2, Al2O3, SiO2, TiO2, etc.

Deposition Rates
Typical deposition rates achieved using Reactaflo are as follows:

• ITO - 4800 A/min
• TiO2 - 900 A/min
• SiO2 - 1800 A/min

Complete System
The Reactaflo PDS-2 package contains all system elements required for a complete installation. The hardware consists of:

• PDS-2: Single Channel Reactaflo Controller (240V or 110V)
• MON-200: EP200 Monochromator
• FO-UV8: Fibre Optic Cable with Vacuum Feedthrough
• OC-206: Plasma Sighting T
• PZO-010: Piezo Electric Control Valve
• CAB-005: Interconnecting and mains cable set