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Gasonics 61-0052-U AWD-D-1-0-011 Pneumatic Diaphragm Valve
Introduction:
This component is a high-purity pneumatic diaphragm valve designed for semiconductor process equipment. It serves as a critical control element for managing the flow of process gases, vacuum lines, or purge gases. The “AWD” series typically indicates a specific diaphragm valve architecture optimized for cleanroom environments, featuring a diaphragm that isolates the actuator from the process media to prevent contamination and ensure leak-tight operation.
Technical Specifications:
- Valve Type: 2-way or 3-way Pneumatic Diaphragm Valve
Detailed content
- Actuation Mechanism: Pneumatic (typically 60-100 PSI supply pressure)
- Body Material: 316L Stainless Steel, Electropolished (EP) for corrosion resistance and low particle generation
- Diaphragm Material: PTFE, PFA, or Kalrez (depending on chemical compatibility requirements)
- Port Configuration: 1/4 inch or 1/2 inch VCR or Swagelok fittings
- Leak Rate: < 1 x 10^-9 std cc/sec Helium (Ultra-high vacuum compatible)
- Cycle Life: > 1,000,000 cycles
- Temperature Range: -20°C to 150°C (Continuous operation)
Functional Features:
- Zero Dead Leg Design: Streamlined internal flow path prevents gas trapping and ensures complete purging, crucial for process repeatability.
- Contamination Isolation: The diaphragm physically separates the process gas from the valve actuator and external environment, eliminating metal-to-metal contact and particle generation.
- Fast Actuation: Rapid opening and closing times (typically < 1 second) allow for precise timing in automated process sequences.
- Chemical Inertness: Wetted parts are constructed from fluoropolymers resistant to aggressive chemistries like chlorine, ammonia, and WF6.
- Fail-Safe Configuration: Available in Normally Open (NO) or Normally Closed (NC) configurations to ensure safety during power or air failures.
Application Scenarios:
- Gas Panel Control: Regulating the flow of precursor gases (e.g., Silane, TEOS) in Chemical Vapor Deposition (CVD) systems.
- Vacuum Isolation: Isolating the process chamber from the vacuum pump during maintenance or wafer transfer.
- Abatement Systems: Switching exhaust flows between the process tool and the abatement scrubber.
- Purge Operations: Controlling Nitrogen or Argon flows to prevent oxidation or clear reaction byproducts.
- Load Lock Operations: Managing pressure differentials during wafer loading and unloading cycles.
