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AMAT 0020-78186

Product Name: Electrostatic Chuck (ESC) with Heater and Gas Channel Assembly

Product Introduction:
This is a core consumable/component for Applied Materials’ Producer, Centura, and Endura platforms. The Electrostatic Chuck (ESC) is the “platform” inside the vacuum chamber where the wafer sits. It uses high-voltage electrostatic force (Johnsen-Rahbek effect) to clamp the wafer firmly in place. It also incorporates a backside helium cooling system, resistive heaters for wafer temperature control, and often lift pins for wafer transfer.

Technical Specifications:

  • Clamping Voltage: High voltage DC (typically 500V to 2000V) applied via a dielectric layer.
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Detailed content

  • Temperature Range: Capable of heating wafers from -20°C (with LN2 assist) up to 600°C+.
  • Helium Pressure: Backside helium cooling channels operate at 5-20 Torr for efficient heat transfer.
  • Dielectric Material: Aluminum Nitride (AlN) or Alumina (Al2O3) with high thermal conductivity and dielectric strength.1.
  • Lift Pin Mechanism: Integrated pneumatic or magnetic lift pins (3-5 pins) to elevate the wafer for robot hand-off.

Functional Features:

  • Wafer Clamping: Provides uniform clamping force across the wafer to prevent movement during high-energy plasma processing.
  • Thermal Control: Precise temperature control (±1°C) is critical for process repeatability (e.g., CVD deposition rates, etch selectivity).
  • Heat Transfer: Backside helium gas fills the microscopic gap between wafer and chuck for efficient heat removal during exothermic processes.
  • Edge Ring: Often includes a focus ring or edge ring to confine plasma and protect the chuck edge from deposition/etch.
  • RF Bias: In etch systems, the ESC often acts as the RF bias electrode to control ion energy direction.

Application Scenarios:

  • High-Power PVD: Holding wafers during high-power sputtering where thermal loads are significant.
  • Plasma Etch: Biasing the wafer to attract ions vertically for anisotropic etching.1.
  • CVD/PECVD: Maintaining precise wafer temperature to control film stress, density, and stoichiometry.
  • Rapid Thermal Processing (RTP): Used in anneal tools for rapid heating and cooling cycles.
  • Ion Implantation: Holding wafers during high-current ion beams.

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