A Thin Film Casting machine is designed for manufacturing low gsm film of different thickness or weight. The machine shall encompass a Doctor Blade Set-Up.

The solvent based volatile mix is directed to form a bank on the substrate (tempered glass sheet) that conveys over a flat plate. A doctor knife is used to form films that controls the thickness. The substrate with the film is introduced to the heating chamber for evaporation of the volatile content.

The current version of the machine is equipped with:
• Doctor Blade
• Heating & Cooling
• Trapping of volatile content to prevent pressure build up in the heating chamber
• Control Systems

Thin Film Deposition

Thin-film deposition techniques include chemical vapor deposition (CVD) and physical vapour deposition (PVD). PVD involves vaporizing the target material, which condenses on the substrate surface, forming a deposited film. PVD deposition techniques include a thermal evaporation process or vacuum evaporation, sputtering, and ion plating.

Thermal Evaporation

Thermal evaporation deposition occurs in a chamber under the pressure of 10(-6) to 10(-5) mbar. A crucible that connects to a high-current source holds the target material. Here are the basic steps for thermal evaporation deposition:

• 1. As the target material heats, it releases vapor particles that create vapor pressure.
• 2. The vapor stream crosses the chamber and coating particles attach to the substrate.
• 3. Throughout the process, the vacuum pump keeps working to maintain a high-vacuum environment and ensure a free path for the film particles.