CVD / CVI coating systems
Type CVD
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.
Functions
- Coating under atmospheric pressure ""AP-CVD"" or under relative pressure ""LP-CVD""
- High flexibility in process optimization and design
- Extensive data evaluation
- Prototype production, series production
- Design: bottom loader
- Temperature measurement using thermocouple and pyrometer
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
Options
- PyC coating and/or infiltration applications
- Automatic refilling station for MTS
- HCl / H2 detectors
- Cooling water supply by chiller or heat exchanger units
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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