Q6: What purity grades of quartz glass can you supply?

Update Time:2026/6/30

A: We provide quartz glass with three differentiated purity levels, tailored to distinct industrial standards, optical performance demands and semiconductor manufacturing cleanliness requirements, covering low-cost conventional equipment, precision optical instruments and ultra-clean wafer processing scenarios respectively.

1. Industrial Purity Grade Quartz Glass

This entry-level grade features a silica content of minimum 99.95%, with controlled trace metal impurities at ppm levels. It is widely applied in conventional high-temperature furnaces, infrared heating tubes, boiler sight glass, laboratory general reaction vessels and ordinary mechanical processing parts. The material balances stable heat resistance and cost efficiency, with loose restrictions on internal hydroxyl content and tiny air bubbles, fully meeting non-precision industrial operating standards. It supports common cutting, grinding and bending machining without strict ultra-clean production environment demands.

2. Optical Purity Grade Quartz Glass

Our optical grade quartz covers JGS1, JGS2 and JGS3 standard series with high silica purity above 99.99%. We precisely regulate internal hydroxyl (-OH) concentration, micro-defects and bubble distribution according to customer-specified spectral transmission bands, ranging from deep ultraviolet to infrared wavelength ranges. JGS1 far UV optical quartz delivers outstanding transmittance under 200nm UV light for UV lithography windows and UV detection lenses; JGS2 UV-visible quartz suits precision optical instruments, spectrometer parts and laboratory optical observation windows; JGS3 infrared quartz maintains stable light penetration in mid-infrared bands for thermal imaging and infrared testing equipment. Every optical blank undergoes full-spectrum transmittance inspection before finishing to guarantee uniform imaging performance.

3. Semiconductor Ultra-High Purity Grade Quartz

This is our top-tier purity standard, with silica content reaching 99.999%. All metallic impurity elements including sodium, aluminum, potassium, iron and calcium are strictly controlled at ppb trace levels. We adopt vacuum melting and ultra-clean manufacturing workshops to minimize internal hydroxyl groups, micro-cracks and particle inclusions. It is specially customized for wafer diffusion furnaces, etching equipment, wafer carriers and semiconductor wafer processing chambers. Ultra-low impurity release effectively prevents ion contamination during high-temperature chip production, avoiding circuit short-circuit or performance attenuation caused by metal ion precipitation. This grade complies with global semiconductor fab cleanliness and high-temperature long-cycle service standards.

All three grades of quartz glass pass unified multi-step quality inspection before delivery, including purity chemical analysis, spectral transmittance testing, high-temperature aging verification and surface defect scanning. We can also customize transitional intermediate purity quartz materials according to customers’ special technical indicators to match unique production line parameters and budget plans.

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Learn more from our FAQ

What is your MOQ for custom optical glass and display glass parts?: Felix Glass offers highly flexible MOQ to support client projects, including prototype testing, small batch trial orders and large-volume mass production. All products can be fully customized according to your drawings, tolerances and application standards. Send us your specs to get an accurate price quote within 24 hours.

Can I get free glass samples for testing before bulk order?: Yes, our FELIX GLASS factory supports sample testing for a wide range of precision optical glass components and assemblies. The lead time for sample production is 3 to 7 working days. Please contact us today to arrange samples and obtain a customized solution that meets your needs.

What is the production lead time for custom optical glass components?: What is the production lead time for custom optical glass components?
Answer: The lead time for standard samples is 3–7 business days, while mass production takes 15–25 business days, depending on product complexity and order volume. We provide reliable, rapid delivery for orders serving the industrial, medical, automotive, and aerospace sectors. Please submit your project details to receive an accurate delivery schedule.

Are your optical glass products ISO, CE and RoHS certified?: All FELIX GLASS precision optical glass components comply with ISO quality system standards, as well as CE and RoHS requirements. We provide comprehensive test reports, material certificates, and inspection documentation for customer review. Please feel free to request full certification details and a formal quotation today.

Do you offer one-stop custom optical glass processing services?: Yes. We provide a full range of in-house processing services, including CNC machining, precision grinding, optical polishing, vacuum coating (AR, AF, AG, IR), tempering, and screen printing. Every step—from raw material to finished product—is carried out within our own facility. Please let us know your requirements, and we will provide you with the most cost-effective solution.

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Q6: What purity grades of quartz glass can you supply?

A specialist in precision optical glass with 19 years of experience, providing comprehensive, satisfying custom solutions.

A specialist in precision optical glass with 19 years of experience, providing comprehensive, satisfying custom solutions.