Quartz glass plates are fundamental components in semiconductor manufacturing, precision optics, solar PV and high-temperature chemical industries, widely used as process substrates, equipment sight windows, carrier wafers and thermal insulation liners. Their flatness, purity and dimensional accuracy directly determine end-product performance and production yield.
Standard low-cost quartz sheets on the market commonly suffer from large thickness tolerance, poor surface flatness, edge chipping and low purity. In high-precision optical applications, they cause optical path deviation and imaging distortion; in semiconductor processes, particle shedding contaminates wafers; under high-temperature high-pressure conditions, uneven stress leads to cracking. Many buyers have to pay several times the cost for imported products.
As a professional high-purity quartz manufacturer based in Donghai, China’s quartz industry hub, JiuRui Quartz provides full-spec custom quartz plate solutions backed by 4N8 high-purity raw material and precision processing lines. We cover thickness from 0.1mm ultra-thin sheets to 50mm thick plates, with full in-house secondary processing including cutting, double-sided polishing, coating, drilling and chamfering. Our flatness, purity and cleanliness meet semiconductor and optical grade requirements, offering a cost-effective domestic alternative to imported products. Explore our 4N8 high purity quartz tubes
Common Pain Points of Standard Quartz Plates
1. Poor Thickness & Flatness Tolerance
Standard quartz plates usually have thickness tolerance above ±0.1mm with poor flatness, surface waviness and unevenness. In high-precision scenarios like optical inspection and semiconductor lithography, this directly causes focusing failure, optical path deviation and process inaccuracy, leading to entire batch scrap.
2. Edge Chipping & Particle Contamination
Rough-cut quartz plates have micro-chipping and glass burrs on edges. During operation, debris falls off and contaminates semiconductor wafers, optical lenses and experimental samples — a fatal defect in Class 100 clean rooms, and a core reason why high-end customers hesitate to choose domestic quartz plates.
3. Low Purity & High-Temperature Devitrification
Low-priced quartz plates are often made from recycled or low-purity raw material with high internal impurities, bubbles and inclusions. At high temperatures, they are prone to devitrification, deformation and impurity precipitation. They also have reduced transmittance and corrosion resistance, with short service life and high total replacement cost.
4. Weak Customization Capability
Most manufacturers only produce standard sizes and thicknesses. For ultra-thin, ultra-thick, large-size or custom-shaped requirements, they either cannot produce them, or have lead times over 30 days with doubled prices, failing to match R&D and mass production schedules. View ASTM standard for fused quartz components
Key Advantages of JiuRui Quartz Plates
1. High-Purity Raw Material, Multiple Material Options
All our quartz glass plates are made from natural high-purity quartz raw material, with options including 4N8 high-purity quartz, low-OH quartz, UV-grade quartz and standard quartz. Impurity content is far below the industry average, with stable high temperature resistance, acid & alkali resistance and light transmittance, eliminating quality risks from recycled or adulterated material.
2. Full Size Range with Precise Dimensional Control
With multiple dedicated forming and processing lines, we achieve full-dimensional custom manufacturing with far better controllability than industry standard:
- Thickness range: 0.1mm ultra-thin quartz plate ~ 50mm thick quartz plate, custom made to order
- Size range: Mini 5×5mm pieces ~ large 1200×2000mm substrates
- Precision grades: Standard industrial, precision, semiconductor/optical grade. Thickness tolerance down to ±0.01mm, flatness down to 0.002mm
- Shape options: Round, square, rectangular, annular and custom irregular shapes
3. Gradient Polishing Process: High Flatness & Zero Chipping
We adopt a multi-step gradient process: rough grinding → fine grinding → rough polishing → fine polishing, removing machining allowance step by step to avoid edge chipping and hidden cracks caused by stress concentration:
- Surface roughness as low as Ra ≤ 0.2μm, mirror finish, no scratches or orange peel
- CNC edge grinding & chamfering, smooth edges with no chipping or burrs, C-angle and R-angle available
- Annealing process eliminates internal stress, resists cracking under high temperature and thermal shock, with 3x longer service life
See our precision grinding capability
4. Clean Room Production for Semiconductor Grade Cleanliness
The entire quartz plate processing flow is completed in a clean workshop. Finished products go through multiple ultrasonic cleaning, dust-free drying and clean packaging steps with strict particle contamination control. They meet the cleanliness requirements of semiconductor and optical industries and can be directly used in clean rooms upon arrival, no secondary cleaning required for customers.
Applications & Product Types
Optical Quartz Plates
High transmittance and high flatness, with material options for UV, IR and visible light bands. Widely used as optical windows, laser protection windows, instrument lenses and optical substrates, suitable for precision optical instruments, laser equipment and testing devices.
Semiconductor Quartz Substrates
Semiconductor-grade purity and cleanliness, low particle emission, high temperature resistance and plasma etch resistance. Used as wafer carriers, diffusion process substrates, etching chamber components and chip packaging substrates, supporting domestic substitution of semiconductor materials.
High Temperature Quartz Sight Glass
Withstands temperatures up to 1100°C and excellent thermal shock resistance, with outstanding compressive strength. Widely used as observation windows for high temperature furnaces, reactor sight glasses, pipeline sight glasses and boiler sight ports, suitable for chemical, metallurgical and heat treatment high-pressure high-temperature conditions.
Ultra-Thin Quartz Plates
Thickness as low as 0.1mm with uniform thickness and flat surface. Used as sensor substrates, flexible electronic substrates, semiconductor thin wafers and micro optical components, suitable for precision electronics, MEMS and scientific research applications.
Custom Functional Quartz Plates
We support custom fabrication including drilling, slotting, step processing and more. We also provide surface coating services such as explosion-proof film, UV protection film and anti-reflective coating, completing all processing in one stop with no need to coordinate with multiple suppliers. Check our surface coating service
Quality Assurance & Service
Full-Process Inspection & Traceable Data
Each batch goes through thickness, flatness, roughness, appearance defect and purity inspections. High-precision products are 100% individually tested. Official test reports are available on request. Zero defective products leave the factory.
Customization & Free Sampling
We accept custom orders based on drawings or samples. Special materials, sizes and processes can all be developed. Free sample testing is available before bulk orders to confirm performance and dimensions.
Stable Lead Time & Expedited Service
Standard sizes ship within 7 days. Custom products deliver in 10–15 days. Expedited production channels are available for urgent R&D and maintenance orders to minimize your downtime.
Safe Packaging & Breakage Replacement
Products are packed in EPE foam with hard carton or wooden crate protection. Ultra-thin and large-size plates use dedicated shockproof packaging. Any breakage during transit is replaced free of charge upon photo confirmation.
Contact Us for Custom Quartz Plates
If you need high-purity quartz plates, optical quartz substrates, semiconductor quartz wafers, high-temperature sight glasses or custom-shaped quartz plates, work with JiuRui Quartz. Full-spec customization, high-precision processing, high-purity raw material, clean production, direct factory pricing.
Company: Donghai JiuRui Quartz Products Co., Ltd.
Brand: JiuRui Quartz
WhatsApp (Direct Chat): +86 15189047520
Products: Quartz glass plates, fused quartz sheets, optical quartz substrates, semiconductor quartz wafers, custom shaped quartz parts
Contact us online for free sample & quote