Corial Plasma Therm – Corial D250 PECVD system

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Corial D250 is designed for low volume production over a wide range of applications for the specialty semiconductor markets.

The Corial D250 PECVD system is based on CORIAL’s unique reactor design. It houses an isothermal, pressurized reactor within a vacuum vessel, which is different from conventional PECVD reactors with heated substrate holders. Featuring a next-generation gas showerhead and symmetrical pumping, the Corial D250 delivers excellent deposition uniformity for a wide variety of applications.

Optimizing film stress control is simple to accomplish thanks to the reactor’s symmetrical design.

COSMA Pulse software enables pulsing of any recipe parameter. The pulsing feature enlarges the process window to achieve better control of film properties, and supports Atomic Layer Deposition (ALD) in the Corial D250.

The Corial D250 PECVD system achieves rapid and uniform deposition for a wide range of materials including SiO2, Si3N4, SiOCH, SiOF, SiC and aSi-H films, on wafers up to 200 mm diameter.

This PECVD system can operate for years without the need for manual cleaning.

Key Benefits


Precise and uniform temperature control of the substrate and reactor walls delivers excellent deposition repeatability and uniformity

The pressurized, symmetrically-pumped reactor ensures high-quality films free of pinholes.


With an isothermal and pressurized reactor, the Corial D250 delivers uniform, high deposition rates on wafer sizes up to 200 mm

Typical deposition rates: 520 nm/min for SiO2, 250 nm/min for Si3N4, 150 nm/min for SiOCH, 100 nm/min for SiC


CORTEX™ Pulse software-controlled pulsing of any process parameters improves control of film properties and enables Atomic Layer Deposition (ALD) in the Corial D250 deposition system


The Corial D250 high temperature, dual pumped configuration enables efficient plasma cleaning at operating temperature, with no corrosion of mechanical parts

No manual cleaning of reactor or vacuum vessel required for many years of operation

Related processes

Typical materials that can be processed with the Corial D250 PECVD system include:

  • Silicon-based compounds : SiO2, Si3N4, SiOCH, SiOF, aSi-H
  • Hard materials: SiC

The Corial D250 can serve a variety of applications in specialty semiconductors markets including:

  • Optoelectronics
  • MEMS
  • Power devices
  • Wireless Communication
  • Integrated optics
Silicon Dioxide (SiO2) PECVD deposition process for step coverage


  • Deposition rate 16 nm/min
  • Refractive index 1.475
  • Stress -250 ± 50 MPa
Fluorinated Silicon Oxide (SiOF) PECVD deposition process for step coverage

Wireless Communication

  • Deposition rate 65 nm/min
  • Refractive index 1.41
  • Stress -30 ± 50 MPa
Stress-less Silicon Nitride (Si3N4) PECVD deposition process


  • Deposition rate 120 nm/min
  • Stress -10 ± 50 MPa
  • Deposition at 280°C
Silicon Dioxide (SiO2) layer deposition for passivation application


  • Deposition rate 270 nm/min
  • Refractive index 1.46
  • RF power 230 W
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