Rowaco AB

Processövervakning

Vision 2000-C™ & Vision
2000-E™

Residual gas analysers for multi-pressure & CVD/ALD processes

The Vision 2000-C™ and Vision 2000-E™ incorporate “smart head” RGA technology from Microvision 2 with a closed ion source and close-coupled inlet. This state-of-the-art RGA technology is integrated with Process Eye™ Professional control platform, a recipe-based, user-configurable software program.

The combination of closed ion source and automated inlet allows seamless monitoring of the complete CVD or Etch process cycle, from base vacuum to process pressures of up to 700 torr.

Key features

Continuous in situ monitoring of CVD and etching processes
Baseline monitoring for air leaks and background contamination
Includes Process Eye™ Professional RGA software
Can be integrated with a wide variety of CVD and Etch tools
Remote Vacuum Controller (RVC) for failsafe vacuum operation
Vacuum troubleshooting for fast PM recovery

ppm level detection for trace contaminants

By maximizing the ratio between CVD or Etch chamber gas signals and the gas background in the differentially pumped Vision 2000-C and Vision 2000-E analyzer housing, the closed ion source enables ppm-level detection for trace contaminants in the process gas. The closed ion source analyzer is manufactured from vacuum prepared stainless steel and high density alumina ceramics, and features independently replaceable twin filaments to provide built-in backup in the event of a filament failure. The standard system includes a double filter analyzer for increased sensitivity of higher mass species, contamination resistance and enhanced long-term stability.

Remote vacuum controller

Each Vision 2000-C and Vision 2000-E system incorporates a Remote Vacuum Controller (RVC) module that provides fail-safe protection for both the process tool and the RGA. It allows full operation and control of RGA system components (filaments, pumps, inlet valves, bakeout, etc.) from the system PC. The compact, remotelymounted rack module includes the RVC and power supplies. The unit is easily mounted onto any standard 19” tool rack for mounting on a process chamber or other compatible location. Thirty three foot (10 m) cables are included as standard so that the probe assembly can be located in a remote position.

Mobile RGA platform

Any Vision 2000-C or Vision 2000-E can be mounted on a mobile RGA platform with the convenience of being able to move the RGA easily between chambers as the need arises. The mobile platform has an integrated laptop table and mounts the electronics on the trolley. Using a standard ten foot (3m) cable loom the platform can be conveniently located away from the RGA mounting point on the tool chamber.

UniBloc™ inlet valve

The exclusive fast response UniBloc™ inlet valve allows sampling at both background and process pressure through orifices selected for the pressures to be encountered. When not sampling, both the valve and analyzer are automatically isolated from the process chamber and purged with inert gas. Purging is done through the mass spectrometer pumping systems, not through the process chamber. Purging is also used during bake-out, reducing initial startup time and residual background recovery time. The inlet valve is operated by integrated electronics and controlled via recipes from Process Eye Professional. The required valve selection is made automatically by a gas independent pressure sensor in the UniBloc inlet which also provides a readout of the process chamber total pressure in the Process Eye Professional software.

Computer-aided design was utilized to engineer the Unibloc to have minimal internal volumes and surface areas. The internal seals are Kel-F® for compatibility with CVD and Etch process gases. The external seals are all metal. A conformal heating jacket provides temperature control to minimize deposition within the valve and to maintain mobility of sticky/polar gases through the inlet.

Process Eye™ Professional control platform

The Vision 2000-C/E analyzer uses Process Eye Professional, a highly flexible, modular application operating under 32bit or 64bit Windows XP, Vista, Server 2008 or Windows 7. Designed with a “client/server” structure, Process Eye Professional incorporates TCP/IP protocol for full network compatibility.

Creating process recipes is made easy by the Recipe Wizard function, which allows customized warnings and alarm levels, triggered whenever the process exceeds preset levels. The Process Eye Professional recipes also specify the way in which the Vision 2000-C or Vision 2000-E acquires, displays and stores data. Other key parameters, such as ion source settings, can be set via the Process Eye Professional recipe. This allows the user to optimize settings for each phase of the process independently. For example, ideal settings for baseline can be set up in the baseline recipe, ideal settings for process monitoring can be set in the process recipe, etc. Process Eye Professional enhances the Vision 2000-C and Vision 2000-E by providing:

Automated and intelligent operation of MKS Spectra RGAs with fully customizable controls and alarms
Flexible scanning
- “Bar Chart”, “Analog” and “Peak Jump” scanning modes which can be mixed and associated with data trend displays
Intelligent, user defined warnings and alarms
- Can include a suggested diagnosis of the fault condition and a recommendation for its solution
Data displays in relevant units, such as Torr, mbar or Pa in the process chamber
Optional ability to read data from other sensors using analog inputs and external events by digital inputs
Data buffer for quick on-line review of recent data
Full storage of all data for subsequent review and analysis

Applications

The Vision 2000-C™ and Vision 2000-E™ are designed to track levels of various gas species during etch processes and the chamber clean, passivation sequences, and deposition steps for various CVD processes including: