Haian Subei Optical Glass Factory

Haian Subei Optical Glass Factory

Processing Specifications for Coating Filter Glass Substrates

2026 03/21

Surface Cleaning

Substrates must undergo ultrasonic cleaning (deionized water + solvent) to remove oil and particles, followed by plasma cleaning to activate the surface and enhance coating adhesion. If mold-preventive powder or corrosion layers remain on the substrate, they must be pre-wiped with calcium carbonate powder.

92% transmistance Optical 365nm Narrow BandPass Filter Glass

Subei Optics specializes in Optical Colored Filter Glass,Coating Filter Glass,and Transparent Glass Windiow.

Baking and Degassing

Prior to coating, the substrate must be baked in a vacuum chamber at 300°C or higher for ≥20 minutes to volatilize adsorbed gases and prevent bubbling or peeling of the coating after deposition.