Double Side Polished Quartz Window 210x20mm High Purity For Semiconductor Vacuum Chamber Sight Glass

Double Side Polished Quartz Window Φ210x20mm

This double side polished quartz window, sized Φ210x20mm, delivers exceptional optical clarity and chemical durability for demanding industrial and scientific applications. Precision polished on both surfaces with high purity quartz construction, it provides high transmittance, 1100°C heat resistance and HF acid resistance—ideal for semiconductor vacuum chamber sight windows, high temperature furnace viewports and chemical reactor sight glass.

Product Parameters

Key Features

• Double-Sided Optical Polishing – Both surfaces precision polished for maximum light transmission with minimal scattering, ensuring distortion-free optical viewing and measurement.
• 1100°C Continuous Operation – Maintains optical clarity and structural integrity under sustained high-temperature conditions, ideal for furnace viewport and high-temperature chamber applications.
• HF & Strong Chemical Resistance – Superior to borosilicate glass, withstands hydrofluoric acid and concentrated acids/alkalis for chemical reactor sight glass applications.
• High Purity, No Contamination – 99.99% pure quartz with zero metal impurity precipitation, preventing chamber contamination in semiconductor and high-clean processes.
• Low Thermal Expansion – Excellent thermal shock resistance prevents cracking under rapid temperature changes, ensuring long service life in cyclic heating environments.

Applications

1. Semiconductor & PV Equipment

Vacuum chamber, PECVD and coating machine sight window that isolates dust and process gases while withstanding high temperature and corrosive gas environments without contaminating chamber workpieces.

2. Optical Inspection Instruments

Light path sealing window for spectrometers and UV testing equipment, ensuring lossless light transmission for improved detection accuracy and measurement precision.

3. High Temperature Industrial Furnaces

Observation viewport for tube furnaces and sintering furnaces, withstanding continuous 200-1100°C operation with resistance to thermal shock cracking.

4. Chemical & Laboratory Equipment

Corrosion-resistant sight glass for reaction vessels and corrosive reaction equipment, resistant to HF and concentrated chemicals for real-time internal process observation.

Advantages over Borosilicate Glass

Unlike borosilicate glass windows that are attacked by HF and degrade at high temperatures, this quartz window offers full HF resistance, sustained 1100°C operation, superior optical transmittance from double-sided polishing, low thermal expansion for thermal shock resistance, and high purity for contamination-free service in semiconductor and high-clean manufacturing environments.