In advanced optical systems, laser technologies, and semiconductor processing, material selection is critical to ensure performance, reliability, and longevity. JGS2 Quartz, a type of high-purity fused quartz glass, offers excellent optical transparency, thermal stability, and chemical resistance—making it a top choice for optical components and substrates operating across the ultraviolet (UV), visible, and near-infrared (NIR) spectra.
This article explores the technical characteristics of JGS2 Quartz and its applications in various high-precision industries.
1. Overview of JGS2 Quartz
JGS2 Quartz is a flame-fused synthetic
fused silica known for its low impurity content, high internal homogeneity, and minimal birefringence. It serves as a reliable base material in optical engineering, semiconductor processing, and photonic devices.
In industry,
JGS2 is often fabricated into:
Optical windows and lenses
Carrier substrates for semiconductor processing
High-purity wafers and polished optical substrates
While JGS2 is one of several grades of
fused quartz (along with JGS1 and JGS3), it strikes an excellent balance between UV performance and cost, making it suitable for general-purpose applications that demand good UV and visible transmission.
2. Optical Properties
| Property |
Typical Value |
| Transmission Range |
220 nm – 2500 nm |
| UV Transmission (@254 nm) |
> 85% |
| Refractive Index (@589.3 nm) |
≈ 1.458 |
| Optical Homogeneity |
High |
| Surface Quality |
10-5 scratch-dig (MIL spec) |
JGS2 exhibits excellent light transmission from the near-UV to the NIR region. While not ideal for deep UV (<190 nm), it performs exceptionally well in standard UV-visible optical systems.
3. Thermal and Mechanical Performance
| Property |
Value |
| Density |
2.2 g/cm³ |
| Thermal Expansion Coefficient |
5.5 × 10⁻⁷ /°C |
| Continuous Service Temperature |
≤ 1000°C |
| Short-Term Temperature Limit |
Up to 1200°C |
| Mohs Hardness |
6.5 |
| Thermal Shock Resistance |
Excellent |
These properties enable
JGS2 to withstand high-temperature and high-vacuum conditions, making it well-suited for demanding environments such as laser systems and semiconductor fabrication.
4. Typical Applications
• Laser Optics
Used in optical windows, lenses, and beam splitters for UV to NIR laser systems. Its excellent thermal and optical properties support stable long-term performance in both pulsed and continuous wave laser setups.
• Spectroscopy & Precision Imaging
JGS2 is valued in spectrometers, interferometers, and UV imaging systems due to its broad transmission range and minimal distortion.
• Semiconductor Processing
Polished
quartz substrates based on
JGS2 are widely used as carriers in photolithography, vacuum deposition, and wafer-level processing. Their high purity and thermal resilience are ideal for cleanroom environments and critical process steps.
5. Comparison with Other Quartz Grades
| Grade |
Transmission Range |
Typical Use Cases |
| JGS1 |
185 – 2500 nm |
Deep UV optics, lithography |
| JGS2 |
220 – 2500 nm |
General UV-visible-NIR applications |
| JGS3 |
260 – 2500 nm |
Visible optics, cost-sensitive use |
While JGS1 is best suited for deep-UV systems, JGS2 provides strong UV-visible transmission at a more accessible cost, making it the preferred option for general optical and electronic applications.
6. Conclusion
JGS2 Quartz Glass offers a high-performance, cost-effective solution for optical components and substrate materials across multiple industries. Its combination of broad-spectrum transmission, thermal durability, and high purity makes it a trusted material in laser optics, precision imaging, and semiconductor processing.
Whether fabricated into wafers, lenses, or structural carriers, JGS2 continues to support the advancement of optical and microelectronic technologies with reliable and repeatable performance.
