Fused Silica Quartz Glass Window SiO2 UV-Infrared Transmitting,
Laser
Product Introduction of Fused Silica Quartz Glass Window
The SiO₂ quartz glass plate, also known as a quartz window, quartz
substrate, or transparent silica sheet, is an amorphous material
manufactured from high-purity silicon dioxide. It exhibits
outstanding optical transmittance, thermal resistance, extremely
low thermal expansion, excellent dielectric strength, and
exceptional chemical inertness. Designed to operate under extreme
temperature and aggressive chemical conditions, quartz plates are
indispensable in advanced technological sectors. Based on purity
and applications, they are classified into optical-grade,
semiconductor-grade, and industrial-grade variants.
Manufacturing Principle of Fused Silica Quartz Glass Window
The manufacturing of quartz glass plates involves the following
steps:
Raw Material Preparation: High-purity natural quartz sand or synthetically vapor-deposited
SiO₂ is used, with metallic impurities controlled below 1 ppm;
Melting & Forming: Electric furnace, flame fusion, or plasma melting is used to melt
the raw quartz at over 2000°C, followed by casting or pulling into
bulk or cylindrical shapes;
Annealing: To relieve internal stress, the quartz plates undergo slow
annealing around 1000°C for dimensional stability;
Cutting & Grinding: Diamond tools are employed to slice quartz blocks into desired
dimensions with precision;
Polishing (Optional): Optical-grade quartz is polished to atomic-level smoothness
(Ra<1nm), on one or both sides;
Cleanroom Packaging: Final cleaning and packaging are done in ISO-certified cleanrooms
to suit semiconductor environments.
Technical Specifications of Fused Silica Quartz Glass Window
| Parameter | Specification / Tolerance Range |
|---|
| Diameter | +0/-0.20 mm |
| Length/Width | +0/-0.20 mm |
| Thickness | ±0.1 mm |
| Flatness | ≤50mm: <½ wave (over 90% clear aperture) |
| >50mm: <2 waves (over 90% clear aperture) |
| Surface Quality | <40-20 scratch/dig |
| Parallelism | <1 arc minute |
Application of Fused Silica Quartz Glass Window
Thanks to its exceptional material properties, quartz glass plates
are applied in:
Semiconductor Industry: Photomask substrates, cleaning carriers, wafer holders, plasma
etching windows;
Laser & Optics: UV windows, IR windows, cavity optics, lens mounts;
Aerospace Optics: High-transparency shields, sensor viewports;
New Energy: Laser welding shields, hydrogen fuel cell ports;
Chemical Labs: Acid/base-resistant observation windows, reactor viewports.
JGS Quartz Glass Classification of Fused Silica Quartz Glass Window
The JGS series is a common classification system for optical-grade quartz glass
in China. Each type offers different transmission characteristics
for UV, visible, and IR light:
| Grade | Name | Key Features | Transmission Range | Typical Applications |
|---|
| JGS1 | UV Optical Quartz | Excellent UV transmission from 190nm | 190–2500nm | UV laser windows, photomask plates, UV spectrometers |
| JGS2 | Optical Quartz | Slight UV absorption, cost-effective | 260–2500nm | Visible laser windows, optical equipment, general optics |
| JGS3 | Infrared Quartz | Strong UV absorption, good IR transmission | 260–3500nm | IR windows, thermal imaging optics, detector shields |
FAQ of Fused Silica Quartz Glass Window
Q1: Is quartz glass the same as crystal glass?
A: No. Quartz glass is pure amorphous silica, while crystal glass
often contains lead oxide and is used for decorative purposes.
Q2: Is quartz plate fragile?
A: While quartz is hard, it's still brittle. Handle with care using
gloves and shock-absorbing packaging.
Q3: Can I request drilled holes or CNC machining?
A: Yes. We offer laser drilling, CNC chamfering, and precision edge
treatment per your specifications.
Related Products
Customizable Sapphire JGSI JGS2 Quartz Optical Components Strong
Thermal Stability
Quartz Glass Window UV Fused Silica Optical Viewport Custom Size
Coating Available
