Sputter coated glass is a special type of glass that has been treated with a thin, functional coating.
This coating is applied using a process called sputter deposition.
In this process, a sputtering cathode is electrically charged to form a plasma.
The plasma then ejects material from a target surface onto the glass substrate.
The coating is applied at a molecular level, creating a strong bond at an atomic level.
This makes the coating a permanent part of the glass, not just an applied layer.
5 Key Points to Understand
1. The Process of Sputter Coating
The process of sputter coating is beneficial due to the stable plasma it creates.
This ensures a uniform and durable deposition.
2. Common Applications
Sputter coating is commonly used in various applications.
These include solar panels, architectural glass, microelectronics, aerospace, flat panel displays, and the automotive industry.
3. Low-E Glass Production
In the context of glass coating, sputtering targets are used to produce low-radiation coated glass, also known as Low-E glass.
This type of glass is popular in building construction due to its energy-saving properties, ability to control light, and aesthetic appeal.
4. Thin-Film Solar Cells
Sputter coating technology is also employed in the production of third-generation, thin-film solar cells.
These are in high demand due to the growing need for renewable energy.
5. Soft Coating Issues
It's important to note that sputtered coatings applied independently of the float glass manufacturing process (off-line) result in a "soft coating".
This soft coating is more prone to scratching, damage, and chemical fragility.
These commercial sputtered coatings are typically applied in a vacuum chamber.
They consist of multiple layers of thin metallic and oxide coatings, with silver being the active layer for Low-E sputtered coatings.
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