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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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James Fu, Sales Director of FELIX OPTICAL GLASS, and a poster displaying contact information for an optical glass deep-processing factory.

James Fu, Sales Director of FELIX OPTICAL GLASS, and a poster displaying contact information for an optical glass deep-processing factory. 2

Learn more from our FAQ

What is the minimum order quantity for custom precision optical glass components?: FELIX OPTICAL GLASS offers highly flexible MOQs to support customer projects, including prototype testing, small-batch trial orders, and high-volume production. All products can be fully customized to your drawings, tolerances, and application standards. Please send us your specifications, and we will reply within 1-5 hours and provide an accurate quotation after careful evaluation within 1-2 days.

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?: A: The production cycle for standard samples is 3-10 working days, while mass production requires 15-35 working days, depending on the complexity of the product and the order quantity. We provide reliable precision optical glass components and fast delivery services for orders from industries such as defense, industrial equipment, medical devices, shipbuilding, robotics, automotive, and aerospace. Please submit your project details so we can provide you with an accurate delivery schedule.

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

Do you offer one-stop custom optical glass processing services?: Yes. We offer a full range of precision optical glass component processing services, including CNC machining, precision grinding, optical polishing, chemical/physical tempering, vacuum coating (AR anti-reflective coating, AF anti-fingerprint coating, AG anti-glare coating, IR infrared coating), and screen printing. From raw materials to finished products, every step is completed in our own factory. Please tell us your needs, and we will provide you with the most cost-effective solution.

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With 19 years of experience as a precision optical glass expert, we provide comprehensive and satisfactory customized solutions.

✔ROHS CE certified ISO9001:2005 quality management system
✔Professional team over 19 years’ experience under Japanese management system
✔Help over 2000+ companies to make prototypes into mass production successfully
✔Challenge the 100% on time delivery goal 100% full inspection report
✔Cost-down solutions for over 2000+ companies with success
✔Free solutions provided based on different industries
✔Support free samples (quick sample production) Small quantity (100-1000pcs) available

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URL: www.felixglass.com

james@felixglass.com: +86 185 6503 2888

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