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Quartz Glass Applications by Industry
FGQuartz manufactures high-purity fused silica (SiO₂ ≥ 99.99%) components for six industries where material purity, thermal stability, and dimensional control directly affect process yield: semiconductor, solar photovoltaic, optics and photonics, laboratory and scientific, fiber optic, and high-temperature industrial processing.
This page maps each industry to the processes that use quartz glass, the components those processes need, the properties that matter, and the fabrication methods FGQuartz applies when standard catalogue parts cannot meet the requirement.
Quick answer
Which industries use quartz glass components from FGQuartz? Six: semiconductor, solar photovoltaic, optics and photonics, laboratory and scientific, fiber optic, and high-temperature industrial processing. The same product families (tubes, rods, plates, wafer boats, crucibles, tanks, and inline heaters) recur across industries, configured differently for each process.
Key takeaways
- The requirement differs by industry, not only by component: the same tube geometry can need a different wall thickness, purity grade, or surface finish for a semiconductor furnace than for a laboratory reaction.
- Optical and photonics applications typically need JGS1 / JGS2 / JGS3 grades matched to wavelength; semiconductor, solar, and industrial applications more often use standard high-purity grades.
- When equipment platforms, wafer formats, or experimental setups fall outside catalogue ranges, custom fabrication builds to your drawing with the same forming and machining processes.
- Quartz is not suitable for HF, hot concentrated phosphoric acid, or hot strong alkalis; see the limits section below.
Written by the FGQuartz Engineering Team · Updated October 2026
On this page: At a glance · Product matrix · Semiconductor · Solar · Optics · Laboratory · Fiber optic · High-temperature · Component stacks · Limits · How to choose · FAQ
Applications at a glance
At a glance
A quick reference across all six industries before the full detail below.
| Industry | Primary components | Critical requirement |
|---|---|---|
| Semiconductor | process tubes, wafer boats, tanks, inline heaters, gas injectors | Ultra-low metallic contamination, thermal cycling stability |
| Solar photovoltaic | crucibles, process tubes, wafer boats | High-temperature strength at production-line cost and volume |
| Optics and photonics | plates and windows, cuvettes, flow cells, rods | UV-to-IR transmission, surface quality, grade matched to wavelength |
| Laboratory and scientific | crucibles, combustion wafer boats, reaction vessels | Chemical inertness, minimal analytical blank contribution |
| Fiber optic | Substrate and overcladding process tubes, starting rods | Concentricity and wall uniformity for refractive index control |
| High-temperature industrial | Furnace process tubes, heater envelopes, thermocouple sheaths | Structural integrity and thermal shock resistance under continuous service |
Which products serve which industries
Product matrix
Based on the primary applications listed on each product page. A dash means the product is not a typical fit for that industry.
| Product | Semiconductor | Solar | Optics | Laboratory | Fiber optic | High-temp |
|---|---|---|---|---|---|---|
| Quartz glass tubes | ● | ● | ● | ● | ● | ● |
| Quartz glass rods | ● | – | ● | ● | ● | ● |
| Quartz glass plates | ● | ● | ● | ● | – | ● |
| Quartz wafer boats | ● | ● | – | ● | – | ● |
| Quartz crucibles | ● | ● | ● | ● | – | ● |
| Quartz tanks | ● | ● | ● | ● | – | ● |
| Quartz inline heaters | ● | ● | – | ● | – | ● |
Solar wet-process use applies to quartz-compatible chemistries only; hot alkaline texturing baths are not suitable for quartz.
How each industry uses quartz glass
Industry detail
Each industry imposes a different combination of temperature, chemical exposure, dimensional tolerance, and contamination control. The sections below map the main processes to the quartz components that support them and the manufacturing methods used when standard sizes are insufficient.
Industry overview. Front-end semiconductor processes run at high temperature under strict contamination limits. Quartz glass combines thermal stability, low metallic impurity levels, and chemical resistance in a way most other materials cannot.
| Process | Quartz components | What matters |
|---|---|---|
| Diffusion, oxidation, annealing | process tubes, wafer boats, gas injectors, push paddles | Thermal shock resistance, dimensional stability under repeated cycling, low particle generation |
| LPCVD and PECVD | process tubes, liners, injectors, carriers | Gas compatibility, clean surfaces, controlled wall thickness |
| Wet cleaning and etching | tanks, inline heaters, carriers | Resistance to acids and cleaning solutions (not HF), minimal metallic leaching |
| Custom furnace fixtures | End caps, baffles, pedestals, thermocouple protection tubes, rods, plates and windows | CNC machining or flame forming when the platform geometry is non-standard |
Design and manufacturing considerations. Wall thickness and concentricity affect temperature uniformity. Slot pitch and surface finish on boats influence particle generation and wafer contact. Clear or opaque grades are chosen by whether optical access or thermal insulation is needed. When furnace platforms change or new wafer sizes are introduced, FGQuartz produces custom tubes, boats, and fixtures from drawings or reverse-engineered samples.
Industry overview. Solar silicon production and cell processing run at high temperature in continuous cycles. Quartz components must hold geometry and purity under sustained thermal load and stay cost-effective for high-volume lines.
| Process | Quartz components | What matters |
|---|---|---|
| Crystal growth (CZ / MCZ / DS) | crucibles | High-temperature strength, controlled bubble content, low contamination of the melt |
| Diffusion and emitter formation | process tubes, wafer boats (M10 / G12 and other formats) | Thermal uniformity, long service life, slot geometry matched to wafer size |
| PECVD and passivation | Liners, carriers, chamber components | Clean surfaces and dimensional compatibility with existing equipment |
| Handling and custom fixtures | Push paddles, support rods, specialized carriers, including for TOPCon-related thermal steps | Built to the equipment platform |
Design and manufacturing considerations. Crucible diameter and wall thickness are chosen by puller capacity and thermal profile. Boat slot design affects loading density and thermal uniformity. Quartz is not used in hot alkaline (KOH or NaOH) texturing baths. When equipment platforms or wafer formats change, FGQuartz manufactures custom tubes, boats, and fixtures to drawing or from a sample.
Industry overview. Optical systems need transmission from the deep UV into the near IR combined with low thermal expansion. Fused silica is selected when ordinary optical glasses become opaque or unstable.
| Process | Quartz components | What matters |
|---|---|---|
| Laser systems | plates and windows, optical blanks | Surface quality and the right grade for the wavelength: JGS1 (about 185–2500 nm) or JGS2 (about 220–2500 nm) |
| Spectroscopy and analytical instruments | Cuvettes, flow cells, optical windows | UV transmission, chemical resistance, path-length accuracy |
| Process monitoring and viewports | Observation windows for furnaces and chambers | Thermal stability plus optical access |
| Custom optical elements | CNC-machined plates, stepped windows, drilled optics | Flatness, parallelism, and polish quality |
Design and manufacturing considerations. Grade selection follows the working wavelength; JGS3 (about 260–3500 nm) is the infrared grade. Optical-grade plates reach flatness down to λ/10 with parallelism under 30 arc seconds. When standard sizes or finishes are insufficient, FGQuartz cuts, grinds, polishes, and CNC-machines custom optical components. See the JGS1 / JGS2 / JGS3 guide.
Industry overview. Laboratory work needs chemical inertness, thermal shock resistance, and very low contamination. Quartz is preferred over borosilicate when temperatures exceed the practical range of ordinary glass or when metallic leaching must be minimized.
| Process | Quartz components | What matters |
|---|---|---|
| High-temperature synthesis, ashing, calcination | crucibles, combustion wafer boats, reaction tubes | Thermal shock resistance, low analytical blank |
| Trace-element analysis | Quartz vessels and labware | Minimal blank contribution, surface finish, cleanliness |
| Chemical processing | Beakers, flasks, reaction vessels, flow cells | Chemical resistance to acids and solvents (not HF) |
| Custom experimental setups | Flame-welded or CNC-machined assemblies | Built to the research drawing |
Design and manufacturing considerations. Wall thickness and geometry affect thermal response; surface finish and cleanliness influence analytical blanks. FGQuartz produces standard laboratory shapes and fully custom vessels, often combining flame forming with precision machining. See quartz vs borosilicate glass.
Industry overview. Optical fiber preform manufacturing depends on the dimensional accuracy and purity of the starting quartz components. Substrate tubes and rods must hold concentricity and wall uniformity through high-temperature deposition.
| Process | Quartz components | What matters |
|---|---|---|
| MCVD | Substrate tubes with tight dimensional control | Concentricity, wall uniformity, purity |
| VAD and OVD | Starting (target) rods and overcladding or jacketing process tubes | Straightness, dimensional consistency |
| Preform handling and sintering | Support fixtures and liners | Dimensional stability at temperature |
Design and manufacturing considerations. Wall thickness variation and concentricity directly affect refractive index control and fiber yield. Centerless-ground rods typically reach straightness and concentricity better than 0.1 mm/m. FGQuartz supplies standard substrate tubes and custom geometries when equipment or process needs fall outside catalogue sizes.
Industry overview. Industrial heating, heat treatment, and chemical processing often run continuously at temperatures where ordinary glasses soften or fail. Quartz provides structural integrity, thermal shock resistance, and chemical inertness there.
| Process | Quartz components | What matters |
|---|---|---|
| Furnace and tube furnace systems | process tubes, liners (clear and opaque) | Continuous service to 1200°C, thermal cycling |
| Infrared heating and curing | Heater envelopes, protection tubes | Optical access, electrical insulation, thermal shock resistance |
| Thermocouple and sensor protection | Thermocouple sheaths, observation windows | Sealed ends, thermal stability |
| Custom high-temperature assemblies | Bent tubes, multi-port vessels, structural supports | Geometry and annealing matched to the thermal cycle |
Design and manufacturing considerations. Wall thickness and grade (clear or opaque) are chosen by whether optical access or thermal insulation is needed. Continuous service temperature and thermal cycling determine geometry and annealing needs. FGQuartz produces standard replacement parts and fully custom high-temperature components.
Typical quartz component stacks
Component stacks
Quartz components are usually specified together, so they should share a material system and thermal behavior.
| Process | Components used together |
|---|---|
| Semiconductor diffusion furnace | process tubes + wafer boats + supporting rods and end plates and windows + thermocouple protection tube |
| Solar diffusion line | Large-format process tubes + cell wafer boats + push paddles and fixtures |
| Wet-bench cleaning station | tanks + inline heaters + circulation tubing + cassette supports |
| Laboratory high-temperature preparation | crucibles or combustion wafer boats + reaction tube |
| Optical fiber MCVD station | Substrate process tubes + support and handling fixtures |
Parts from one supplier and material system keep thermal expansion and tolerances compatible across the stack.
When quartz is not the right choice
Limits
Quartz is chosen for purity, thermal stability, and chemical inertness. It is not suited to every environment.
| If your process involves… | Quartz suitability | Consider |
|---|---|---|
| HF (hydrofluoric acid) | Not suitable. HF attacks fused silica. | An HF-compatible material, such as a fluoropolymer |
| Hot concentrated phosphoric acid | Not suitable. | A compatible material for the bath |
| Hot strong alkalis (for example hot KOH or NaOH) | Not suitable; quartz is attacked, so hot alkaline texturing baths do not use quartz. | A compatible material for the bath |
| Continuous service above about 1200°C | Beyond the continuous working limit of fused silica. | A higher-temperature ceramic |
| High mechanical impact | Quartz is hard but brittle. | Design for support and protected edges, or a tougher material |
Full property data: Technical Specifications.
Custom quartz components for specialized applications
Custom
When process equipment, wafer size, optical path, or experimental geometry falls outside standard ranges, FGQuartz builds custom components by combining forming and machining.
Common custom requirements
- Non-standard outer diameter, inner diameter, wall thickness, or length
- Side ports, sealed ends, multi-port manifolds, flanged connections
- CNC drilling, slotting, grooving, milling, and threading
- Tube bending, diameter reduction or expansion, flame sealing
- Complex CNC-machined plates, blocks, fixtures, and optical elements
- Quantities from a single piece through production
Manufacturing approach. Simple tubular geometries are drawn and flame formed. Precise holes, slots, steps, and complex profiles are added by CNC diamond machining. Surfaces may be ground, polished, or flame-polished for particle control or optical needs, and stress-relief annealing is applied where machining or welding stress must be controlled. See thermal processing and cold processing.
Customers may supply DXF, STEP, IGES, or PDF drawings, or physical samples for reverse engineering. FGQuartz reviews manufacturability, recommends the process route, and supports prototype and production orders. Explore custom quartz glass fabrication →
How to choose quartz glass components for your application
A practical sequence used by process engineers and procurement teams:
- Define the process — temperature range, chemical environment, optical requirements, mechanical loads.
- Identify the function — containment, wafer support, gas delivery, optical access, thermal insulation, chemical resistance.
- Determine geometry — tube, boat, crucible, plate, window, tank, heater chamber, or a multi-feature part. Use the table above to confirm typical components for your industry.
- Specify critical dimensions — OD, ID, wall thickness, length, slot pitch, hole positions, flatness, surface finish.
- Select grade — clear or opaque; optical grade (JGS1 / JGS2 / JGS3) when transmission is required.
- Decide standard or custom — if catalogue sizes do not match, prepare a drawing or sample.
- State quantity and lead-time needs — prototype, pilot, or production.
- Submit for engineering review — FGQuartz evaluates manufacturability and recommends the process route.
Application context, not only dimensions, allows more accurate material and process recommendations.
Information required for a quote
For an accurate quotation, provide as much of this as available:
- Drawing (DXF, STEP, IGES, PDF) or a dimensioned sketch
- Application or process description
- Operating temperature range
- Chemical environment, if known
- Required surface finish or optical grade
- Quantity (prototype and production)
- Critical tolerances or functional requirements
If no complete drawing exists, a photograph of an existing part with key dimensions and the intended application is often enough for an initial feasibility assessment.
Frequently asked questions
FAQ
Yes. Optical and photonics applications typically require JGS1/JGS2/JGS3 optical grades matched to wavelength, while semiconductor, solar, and industrial applications more often use standard high-purity grades.
Yes. These six categories cover our most common customer industries, but our fabrication capability isn’t limited to them.
Quartz glass uniquely combines near-zero thermal expansion, high-temperature stability, broad optical transmission, and chemical inertness — a combination no other affordable material matches.
FGQuartz supplies six main industries: semiconductor, solar photovoltaic, optics & photonics, laboratory & scientific research, fiber optic manufacturing, and high-temperature industrial processing.