Fused silica, optical-grade and semiconductor-grade quartz parts — matched to specialized Vietnam partners with the right grinding, lapping and polishing capability for your specification.
Quartz is a notoriously difficult material — hard, brittle, sensitive to thermal shock. We don't pretend to run quartz in-house. Instead, we maintain working relationships with a small number of Vietnam workshops that have the diamond tooling, ultrasonic equipment and process discipline to do it properly.
Quartz isn't a commodity machining job. The process below is what we follow on every program — from the first drawing review through inspected delivery — to make sure the right partner is matched to the spec, not just the lowest bidder.
You send STEP, PDF or DWG. We review feasibility against partner capability — flag any features that quartz tolerates poorly before quoting.
We assign the program to the workshop best suited for the grade, geometry and finish — not a default vendor.
Formal quote with lead time, raw quartz origin, and first-article inspection plan. No pricing without a real partner committed.
Photos and inspection updates at key milestones. CMM or optical comparator data on critical features. We attend the workshop when needed.
EXW Vietnam by default. CIF available on request. Custom packaging for fragile optical or semiconductor parts.
Most international buyers who try to source quartz machining directly from a Vietnam workshop run into the same three problems within the first two purchase orders. A sourcing layer exists because going direct on a difficult material rarely works for low-to-mid volume buyers.
Quartz parts tend to cluster around a small number of end uses where the material's optical, thermal or chemical properties are non-negotiable. Below are the application areas where partner workshops have prior production experience.
Wafer carriers, chamber windows, cleaning baskets, thermal process tubes, RTP rings.
Laser windows, prisms, sample cells, UV-transmitting optical elements, lens substrates.
Cuvettes, reaction vessels, viewports, spectrometer components, custom labware.
Quartz is not one material. Buyers who ask for "quartz parts" without specifying grade typically receive whatever is cheapest to source, which is rarely what the application actually needs. The wrong grade can survive incoming inspection and still fail in service — usually under thermal cycling or UV exposure. A short orientation on the four grades partner workshops handle most often:
Fused quartz is melted from natural crystalline quartz. It is cost-effective and works for most general industrial applications including viewports, light shields and laboratory glassware. Optical clarity is acceptable in the visible range but degrades quickly in deep UV.
Fused silica is synthesized from silicon-bearing chemicals rather than melted from a natural mineral. The result is dramatically lower metallic impurity, better UV transmission and tighter optical homogeneity. This is the grade specified for semiconductor process tubes, deep-UV windows and precision photonics.
Optical-grade quartz covers a family of selected fused silica blanks with strict specifications on bubbles, inclusions, striae and refractive index uniformity. Required for laser optics and any application where wavefront error matters more than mechanical dimension.
Synthetic quartz crystal is grown hydrothermally and used where piezoelectric or birefringent properties are needed. Outside our normal sourcing scope but available through extended partner network on request.
A complete inquiry package shortens time-to-quote from weeks to days and reduces the chance of surprises after the first article. Below is the minimum information partner workshops need to commit to a price and lead time. Missing any of the items typically triggers a clarification round before any quoting begins.
2D drawing in PDF with full GD&T, plus a 3D STEP file. Critical dimensions, surface finish callouts and parallelism or flatness specs must be unambiguous. Quartz cannot be reworked the way metal can — a missed tolerance becomes scrap.
Specify the quartz grade by name or by performance — UV transmission, hydroxyl content, metallic impurity ceiling, refractive index. State whether mill certificate or full traceability documentation is required at delivery.
Prototype quantity, expected production batch size, and any forecast on annual volume. This drives whether the program is best routed to a small-batch optical specialist or a higher-volume semiconductor workshop with different cost structure.
Buyers familiar with metal CNC sometimes assume quartz parts can be quoted on the same lead times and tolerances. They cannot. Understanding the underlying process constraints helps set expectations correctly before the first program kicks off.
Quartz is removed almost entirely by abrasion, not by cutting. Diamond-bonded grinding wheels, ultrasonic horns and lapping plates do the work that end mills and inserts do on metal. Material removal rates are an order of magnitude slower, and the process generates significant heat that must be flooded away with coolant to avoid thermal shock cracking. This is why a "simple" quartz part can take three to five times longer to machine than a metal equivalent of the same geometry.
Edges are the highest-risk feature on any quartz part. Sharp internal corners are best avoided in the design phase — they concentrate stress and become crack initiation sites either during machining or in service. Where sharp edges are unavoidable, partners apply a small chamfer or radius and verify under magnification. Drilling deep holes in quartz typically requires ultrasonic assistance and a peck cycle to clear chips and prevent breakthrough chipping at the exit face.
Surface finish is achieved in stages: rough grinding to bring the part close to net shape, fine grinding to refine the surface, then lapping or polishing for the final optical or sealing surface. Each stage uses a finer abrasive grit and removes a known amount of material. Skipping a stage to save time produces visible surface defects that fail incoming inspection. Partner workshops with good process discipline document the abrasive sequence and inspection criteria for each program rather than relying on operator judgment.
Vietnam offers competitive lead times and pricing for low-to-mid volume quartz orders, with growing capability in optical and semiconductor-grade work. For buyers diversifying away from China for tariff or IP reasons, Vietnam workshops provide a credible alternative with English-speaking project management.
Vetted partners handle fused quartz, fused silica, optical-grade quartz and synthetic quartz. Typical processes include CNC grinding, ultrasonic machining, lapping and polishing. Achievable surface finish ranges from Ra 0.4 to Ra 0.05 micrometers depending on grade and partner.
Each workshop is audited on equipment list, sample quality, ISO certification, export history and traceability of raw quartz. We require a verified first-article inspection on every new program before approving production runs.
MOQ depends on the specific part geometry and grade. Prototype runs from 1 to 10 pieces are accepted by most partners. For production, typical economic batches start at 50 pieces, though smaller runs can be arranged for high-value optical or semiconductor parts.
We respond to all sourcing inquiries within 24 business hours. A formal quote with partner workshop matched to your specification typically follows within 3 to 5 business days, depending on drawing complexity and material availability.
Attach your STEP, PDF or DWG. Within 24 business hours we'll confirm feasibility, identify the right partner workshop and outline the quote timeline.
If your project requires broader Vietnam sourcing beyond quartz — CNC, fabrication, assembly — start at our main hub.
Visit vncnc.com →Specialized in quartz CNC grinding, ultrasonic machining or optical-grade polishing in Vietnam? Email partner to discuss joining the supplier network. Looking for ISO 9001+ workshops with prior export experience to US, EU or Japan.