Fused Silica
Fused silica wafers are highly valued in various optical applications due to their exceptional properties. These wafers come in different grades, each tailored for specific uses, such as deep ultraviolet (DUV) and infrared (IR) applications.
DUV Grade Fused Silica Wafers
The UV grade fused silica wafers are made from fully synthetic materials with very low trace metal content, produced using the Synthetic Chemical Vapor Deposition (CVD) method. This process ensures the wafers have high purity and excellent optical properties. Fused silica is highly resistant to heat and exhibits a broad transmission range, with more than 85% transmission at 185 nm and over 90% from 200 nm to 2000 nm. Common brands and grades for UV grade fused silica include JGS1, Corning 7980, and SK1300. CQT Group supplies these wafers with diameters up to 8 inches (200 mm) and a surface roughness (Ra) of less than 0.5 nm, making them ideal for precision optical applications where minimal surface defects are crucial.
IR Grade Fused Silica Wafers
IR grade fused silica wafers are designed for applications requiring high transmission in the infrared range, typically from 185 nm to 3500 nm. These wafers have very low hydroxyl (OH) content, usually less than 5 ppm, which minimizes absorption in the IR region. The electrical melting method is used to produce IR grade fused silica, ensuring a high level of purity and consistency. Common brands and grades for IR grade fused silica include JGS3, Corning 7979, and SK1310. CQT Group supplies these wafers with diameters up to 8 inches (200 mm) and a surface roughness (Ra) of less than 0.5 nm, making them suitable for high-precision IR optical components and applications where low OH content is essential for performance.
Fused silica wafers process capability
The general specs are as follows sheet, if your specified is not included with it, you may freely tell us and we’ll pleased to customize them for you.
