Engineered to tight tolerances for semiconductor diffusion, optoelectronic shielding, high-vacuum chambers, and analytical labs.
Analyzing physical limits, mechanical integrity, and the transition toward sub-0.2mm precision substrates.
In modern industrial manufacturing, the thin quartz plate represents one of the pinnacle achievements in high-purity inorganic material fabrication. Derived from synthetically synthesized silicon tetrachloride (SiCl4) or high-grade natural pegmatite quartz refined above 99.999% (5N) purity, thin quartz plates (ranging from 0.05 mm to 3.0 mm in thickness) solve critical physics bottlenecks that conventional borosilicate or soda-lime glass cannot endure. Operating in extreme temperature domains where thermal shock resistance must coexist with extreme optical transparency from deep ultraviolet (DUV 185 nm) through the near-infrared (NIR 3500 nm) spectrum, these precision elements act as functional structural windows, dielectric isolators, and chemical containment barriers.
Historically, thinning fused silica below 1.0 mm generated crippling micro-crack propagation and sub-surface damage (SSD) during mechanical slicing. However, next-generation double-sided chemical-mechanical planarization (CMP), ultrasonic diamond micro-milling, and laser thermal stress cutting have shifted the industry paradigm. Modern suppliers now routinely fabricate plates measuring down to 0.1 mm with surface roughness Ra < 0.2 nm, total thickness variation (TTV) within 1.0 μm, and parallelism superior to 2 arcseconds, empowering quantum telemetry, next-gen lithography, and micro-electromechanical systems (MEMS).
| Property / Characteristic | High-Purity Fused Quartz (JGS1) | Optical Fused Silica (JGS2) | Infrared Fused Silica (JGS3) | Borosilicate Glass (D263/Pyrex) |
|---|---|---|---|---|
| SiO2 Purity (%) | ≥ 99.999% (5N) | ≥ 99.99% (4N) | ≥ 99.99% (Low OH) | ∼ 80 - 81% |
| Usable Transmission Range | 185 nm – 2500 nm (DUV-UV) | 220 nm – 2500 nm (Optical) | 260 nm – 3500 nm (Full IR) | 350 nm – 2000 nm |
| Hydroxyl [OH-] Content | ≤ 10 – 30 ppm | ≤ 150 – 200 ppm | ≤ 2 – 5 ppm | Not Regulated |
| Thermal Expansion (CTE) | 5.5 × 10−7 / K | 5.5 × 10−7 / K | 5.5 × 10−7 / K | 32.5 × 10−7 / K |
| Softening Point (°C) | 1,683 °C | 1,680 °C | 1,675 °C | 820 °C |
| Dielectric Strength (kV/mm at 20°C) | 25 – 40 kV/mm | 25 – 35 kV/mm | 25 – 35 kV/mm | 15 – 20 kV/mm |
How the Donghai industrial quartz hub leverages automated cold machining, high-capacity plasma melting, and full-spectrum quality control.
Situated in Donghai County, Jiangsu—the undisputed quartz capital of the Eurasian continent—our facilities command direct raw material extraction lines. Access to pristine high-silica sands drastically lowers raw billet lead times, eliminates speculative ocean transit surcharges, and secures uncompromised 5N purity chains directly from the melting furnace to the finishing bay.
The transformation from thick ingot to ultra-thin quartz plate requires high-speed precision cold machining. Our production lines feature multi-axis computerized diamond wire slicing saws, robotic pick-and-place double-sided planetary polishers, and high-precision CNC waterjet routers. We achieve complex custom geometries, stepped edge grinding, and micro-drilling without chipping.
Every thin quartz plate, furnace tube, and custom vessel leaves the workshop with traceable metrology validation. Our internal test suite leverages Zygo laser interferometers, non-contact coordinate measuring machines (CMM), UV-Vis-NIR spectrophotometers, and ultra-sensitive helium mass-spectrometry leak detection units capable of identifying micro-leak rates below 1×10−9 Pa·m3/s.
Deployments where high mechanical strength, chemical non-reactivity, and zero devitrification are mandatory.
Thin quartz carrier plates act as rigid, high-temperature wafer substrates during temporary bonding, backside chemical thinning, and high-frequency RF etching. They withstand aggressive fluorinated gas plasmas (CF4, NF3) without heavy ion contamination or lattice degassing.
Functioning as Brewster windows, beam splitters, and output coupler plates for high-energy excimer lasers, thin fused silica plates deliver optical transmission > 93% without anti-reflective coating, zero fluorescence under UV irradiation, and laser damage thresholds exceeding 15 J/cm2.
Ultra-thin 0.15 mm quartz coverslips and microfluidic channels enable high-resolution confocal microscopy, DNA sequencing flow cells, and PCR thermal cycler chambers. Quartz eliminates the autofluorescence background common in conventional glass slides.
Serving as protective observation viewports and thermal shield plates inside diffusion, LPCVD, and PECVD tube systems. Our plates resist high-temperature warping at 1,100°C, sustaining seamless visual inspection and infrared pyrometer measurements.
The Challenge: A premier European Tier-1 semiconductor equipment manufacturer experienced repeated thermal fracture failures with their protective quartz viewports during 1,150°C rapid thermal annealing cycles. Standard 3.0 mm commercial plates accumulated high thermal gradients between center and perimeter, causing edge micro-flaws to rapidly propagate across the glass body.
The Engineering Solution: Southeast Quartz engineered a customized 0.8 mm ultra-thin JGS1 synthetic fused silica plate featuring high-precision C-profile edge polishing and fire-polished chamfering. By diminishing plate thickness by 73%, the trans-substrate thermal gradient was minimized, and internal stress-relief vacuum annealing at 1,180°C eliminated residual cooling stress.
The Operational Result: In qualification trials of 10,000 thermal shock cycles from room temperature to 1,150°C at ramp rates of 150°C/second, zero viewport fractures were recorded. Equipment uptime climbed by 18%, and viewport replacement cycles extended from 3 weeks to more than 14 months.
Authoritative guidance addressing dimensional tolerances, optical grades, thermal thresholds, and custom CNC fabrication.
Complete your supply setup with factory-direct quartzware manufactured in Donghai, Jiangsu, fully tested for zero leakage and extreme vacuum service.
Connect directly with our senior quartz application engineering team in Donghai. Send your DXF, DWG, STEP, or PDF engineering drawings specifying thickness, dimensional tolerances, optical surface requirements, and operational thermal parameters. Our metallurgical and cold-machining teams will deliver complete DFM (Design for Manufacturability) feasibility reviews, material certifications, and formal quotations within 24 hours.
