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CVD / CVI coating systems

Type CVD

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Description

Thermally induced chemical vapor deposition (CVD) is a powerful way of depositing homogeneous layers of various dielectric, semiconducting and metallic materials, either in monocrystalline, polycrystalline, amorphous or epitaxial state on small or large area substrates.

Typical coating materials include pyrolytic carbon, silicon carbides and boron nitrides. By using synthetic precursors, the coatings are extremely pure and meet the typical requirements of the semiconductor industry.

Depending on the process parameters, a wide range of layer thicknesses is possible, from single or a few atomic layers to solid protective or functional layers with a thickness ranging from a few nanometers to hundreds of micrometers and beyond to monolithic parts with a thickness of several millimeters.

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Main specifications

  • Application temperatures up to 2200 °C
  • Multi-zone heating
  • rotating turntable
  • exhaust gas aftertreatment
  • Controlled separation and treatment of by-products
  • Gas treatment and gas phase separation for SiC, Si3N4, BN and AlN

SiC: CH3SiCl3 → SiC + 3HCl
Si3N4: 3SiCl4 + 4NH3 → Si3N4 + 12HCl
BN: BCl3 + NH3 → BN + 3HCl
AlN: AlCl3 + NH3 → AlN + 3HCl

 

CVD
Standardtypes
useful   dimensions  (Ø/h) [mm]  nutzbare   Volume
[dm3]
max. load  [kg] max.
Temperature
[°C]
max.
heating power
[kW]
CVD 30 360 x 295 30 ≤ 25 1600 45
CVD 175 530 x 800 175 ≤ 100 1600 150
CVD 900   900 x 1400 900 ≤ 400 1600 300
CVD 2500  1400 x 1700 2600 ≤ 600 1600 500
FS W 500-CVI 1000 x 600 500 ≤ 450 1600 300

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