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Film Thickness Monitor Glass (Coating Test Substrates)
Film thickness monitor glass (also known as optical coating test glass or deposition witness chips) consists of precision-polished optical glass substrates designed for real-time spectral monitoring and deposition thickness verification during vacuum thin-film coating processes.
Functions:
Serves as a synchronous witness substrate during physical vapor deposition (PVD), electron-beam gun evaporation (EBGE), or sputtering. Provides precise optical path control, accurate refractive index measurement, and post-coating spectral verification to ensure consistent layer thickness and spectral performance across production batches.
Applications:
Vacuum coating chamber monitoring systems
Optical thin-film deposition equipment
Thin-film thickness verification
Coating process qualification.
▽D142 ▽Informations and Notes
ITEM NO:D30 (Dia29.7~30mm B270)
Spectral Characteristics
Tave>92% @ 380-680nm
Physical Characteristics
Thickness: 1.1mm
Round: Dia29.7 (+/-0.3mm)
Coating machine cavity temperature:
20~400°C
ITEM NO:D95 (Dia94.7~95mm B270)
Spectral Characteristics
Tave>92% @ 380-680nm
Physical Characteristics
Thickness: 1.1mm
Round: Dia95 +/-0.3mm
Coating machine cavity temperature:
20~400°C
ITEM NO:D140
Spectral Characteristics
Tave>92% @ 380-680nm
Physical Characteristics
Thickness: 1.35mm
Round: Dia95 +/-0.3mm
Coating machine cavity temperature:
20~400°C
ITEM NO:D142
Spectral Characteristics
Tave>92% @ 380-680nm
Physical Characteristics
Thickness: 1.65 +/-0.1mm
Round: Dia142 +/-0.3mm
Coating machine cavity temperature:
20~400°C
Information and Notes
1. Optical film thickness monitor glass is engineered specifically for real-time deposition monitoring, spectral verification, and coating chamber witness testing in thin-film coating systems.
2. Custom geometrical shapes, non-standard dimensions, precision edge finishing, and specific thickness profiles are available to meet OEM coating fixture and holder requirements.
3. Spectral transmittance curves represent measurements at normal incidence (0° angle of incidence). Non-transmitted light within the spectrum is absorbed by the physical optical properties of the glass substrate.
4. Website specifications are provided for reference only. Final production and delivery comply with mutually agreed engineering specifications.
5. Standard monitoring substrates utilize SCHOTT B270 optical glass. SCHOTT B270 is a registered trademark of SCHOTT AG.
