Measured on every part. Written down. Kept.
A diamond component is small, expensive and usually on the critical path of someone's project. The only responsible way to sell one is to measure it, record what you measured, and still be able to prove it years later.
No sampling plan. Every part.
Statistical sampling is reasonable when parts are cheap and identical. Ours are neither. Every finished plate, anvil, window, spreader and assembly is measured individually for dimensions, flatness, total thickness variation, roughness and orientation, and for the optical, electrical or vacuum figures the application depends on. The results are recorded against the part's serial number before it is released.
A part outside the agreed specification does not ship, and it is not quietly reclassified into a lower grade without telling you. Where a lot is marginal, we telephone before we dispatch.
What the passport records.
Each part travels with a material passport. It carries measured values, not nominal ones, and it is the document we refer to when a question arrives long after delivery.
Identity
Serial number, growth run, material type and the purchase order line it was made for.
Geometry
Lateral dimensions, thickness at five points, total thickness variation, parallelism, wedge and edge condition.
Surface
Roughness on each polished face, inspection grade for pits, chips and scratches at 20× magnification.
Crystal
Orientation and miscut from Laue diffraction, nitrogen by FTIR, and birefringence or photoluminescence where specified.
Function
Transmission, resistivity, leak rate, thermal conductivity by lot, or detector figures, depending on the series.
Release
Date, inspector and the specification revision the part was released against.
What ships with the parts.
Material passport
One per serialised part, with measured values as described above.
Certificate of conformance
Signed statement that the consignment meets the agreed specification, referencing purchase order and serial numbers.
Dimensional record
Tabulated measurements for the consignment, suitable for incoming inspection without re-measurement.
Spectra and images
FTIR, UV-Vis, cross-polar or photoluminescence data on request, in native and PDF formats.
Export control and end use.
Synthetic diamond in some forms and for some applications is subject to dual-use export control. We screen every order against Hong Kong Trade and Industry Department requirements and the international regimes that apply to the destination, and we ask for an end-use statement where the application calls for one.
This occasionally adds a few days to an order. It is far better than the alternative. If your programme carries specific documentation or jurisdictional requirements, tell us at the enquiry stage so they can be built into the quotation rather than discovered after the purchase order.
Packaging and shipment.
Cleaned
Solvent-rinsed and, where the application requires it, acid-cleaned, with polished faces protected throughout handling.
Retained
Membrane or gel boxes hold each part so that it cannot move, chip or touch another part in transit.
Sealed
Boxes are sealed and packed in a rigid outer carton; shock and tilt indicators are fitted on request.
Carried
Insured, tracked air freight worldwide. EXW Hong Kong, FCA Hong Kong International Airport or DAP as agreed.
Need a document that is not listed?
Qualification programmes often need paperwork that is not on this page. Ask early and we will tell you exactly what we can produce.