Alumina Substrates Series
Alumina ceramic substrates offer excellent insulation, thermal conductivity and dimensional stability with a flat surface. They can be drilled, diced and metallized, serving as the core insulating and heat-conducting base material for electronic circuits, power devices and heating modules.
Alumina Substrates Series
Alumina ceramic substrates offer excellent insulation, thermal conductivity and dimensional stability with a flat surface. They can be drilled, diced and metallized, serving as the core insulating and heat-conducting base material for electronic circuits, power devices and heating modules.
What we need to quote
Drawing (PDF / DWG / STEP), material grade, quantity and surface finish. No drawing? Send a sample or a sketch and we will convert it.
Series Photos
Alumina Substrates Series
Alumina Substrate — Electrical Insulation
Alumina Ceramic Substrate
Alumina Ceramic Substrate (Type A)
Alumina Ceramic Substrate — Non-Magnetic
Alumina Ceramic Substrate — Thermally Conductive & Insulating
Alumina Ceramic Substrate — Corrosion Resistant
Alumina Ceramic PlateAlumina Substrates Series
Alumina ceramic substrates offer excellent insulation, thermal conductivity and dimensional stability with a flat surface. They can be drilled, diced and metallized, serving as the core insulating and heat-conducting base material for electronic circuits, power devices and heating modules.
Available processes and finishes
- Thickness 0.25–5 mm; laser cutting, drilling and dicing available
- Metallizable surface (Mo-Mn, W) followed by Ni/Au plating
- Dimensional, visual and dielectric checks before shipment, with test report
Shipment inspection
Dimensional sampling report with every batch; full dimensional report, roughness report, insulation resistance test and certificate of conformance on request.
Technical data
| Parameter | Typical value | Notes |
|---|---|---|
| Alumina purity | 92% / 95% / 99% | Several purity grades |
| Density | 3.65–3.90 g/cm³ | Depending on purity |
| Dielectric strength | ≥18–22 kV/mm | High insulation reliability |
| Thermal conductivity | 20–28 W/m·K | Excellent heat conduction |
| Surface flatness | ≤0.02 mm | Flat, no distortion |
| Thickness range | 0.25 mm – 5 mm | Thickness customizable |
| Max. service temperature | 1500–1750 ℃ | High temperature resistant |
| Material grade | Al₂O₃ 92% / 95% / 99% | |
Where you will typically find this part
Power electronics
Power module insulating substrates, heat spreaders
LED & lighting
LED ceramic substrates, COB substrates
Heating elements
MCH heating plates, heating film substrates
Sensors
Thick-film circuit substrates, sensor carriers
Semiconductor packaging
Package lids, insulating spacers
Machining capability & tolerances
The ranges below are routinely achievable. Real tolerances depend on shape, size and material — send the drawing and we confirm each item.
| Item | Standard | Precision |
|---|---|---|
| Dimensional tolerance | ±0.05 mm | ±0.02 mm |
| Flatness | ≤ 0.01 mm | ≤ 0.005 mm |
| Surface roughness | Ra 0.4 μm | Ra 0.2 μm |
| Minimum hole diameter | φ 0.3 mm | φ 0.15 mm |
| Parallelism / perpendicularity | 0.02 mm | 0.01 mm |
Precision grade requires drawing review and may add operations and cost.
Forming, machining & finishing
- Dry pressing
- Isostatic pressing
- Injection moulding
- Hot die casting
- Extrusion
- Diamond grinding
- Surface / centreless grinding
- Ultrasonic machining
- Laser cutting
- CNC engraving
- Polishing to Ra 0.2
- W/Mo-Mn metallisation
- Nickel / gold plating
- Glazing
- Ceramic-to-metal brazing
What we need to quote
Drawing (PDF / DWG / STEP), material grade, quantity and surface finish. No drawing? Send a sample or a sketch and we will convert it.
Send Drawing for QuoteSix things to include in your RFQ
The more complete the information, the faster and more accurate the quote. No drawing yet? Start with a sample or a sketch.
Drawing
PDF, DWG or STEP, with critical dimensions and tolerances marked.
Material grade
E.g. 99% alumina or zirconia. Not sure? Describe the operating conditions and we will recommend.
Quantity
Sampling quantity and expected volume, so we can quote tiered pricing.
Tolerance requirements
Dimensional and geometric tolerances on critical features; non-critical faces can be left open.
Surface & post-processing
Roughness, metallisation, glazing, plating or brazing requirements.
Lead time & application
Target delivery date and end use, so we can match process and capacity.
A photo of the part or a short note on the operating conditions speeds up the engineering review.
FAQ
Can you work without a drawing?
Yes. Send a sample, a sketch or clear photos with the critical dimensions marked and our engineers will produce a drawing for your approval. Confidential drawings can be covered by an NDA first.
What is the minimum order quantity?
Standard MOQ is 10 pieces, with better unit pricing from 50 pieces. For R&D we can evaluate 1–5 piece sample requests case by case.
Can I get a sample first?
Standard sizes can be supplied from stock as sample chips. Custom sizes carry a sampling charge, which is fully credited against your volume order.
What is the lead time?
Samples 10–15 days after drawing approval, volume 4–6 weeks. Metallisation or ceramic-to-metal brazing usually adds another 1–2 weeks.
Is the sampling charge deductible?
Yes. The sampling charge for custom sizes is credited in full against the subsequent volume order; standard sample chips are free (freight at cost).
How small a hole or how thin a wall can you make?
Routinely φ0.15 mm minimum hole and 0.3 mm minimum wall. The real limit depends on material, part size and hole depth, so we assess it from your drawing.
Do you offer metallisation and ceramic-to-metal sealing?
Yes — W/Mo-Mn metallisation, nickel/gold plating and ceramic-to-metal brazing. Helium leak rate and similar targets can be agreed to your specification.
What are the payment terms?
T/T: 30% deposit, 70% before shipment. Monthly settlement can be arranged for long-term partners.
Who handles export documents and shipping?
We handle the full export document set (invoice, packing list, certificate of origin, etc.) and arrange logistics, or ship through your nominated forwarder.
How is quality verified, and what if it fails?
You get a dimensional report and photos before shipment, and third-party or video inspection can be arranged. If incoming inspection fails, we rework or replace free of charge.
Related products
Not the model you need?
Send us the drawing, a photo of the sample or the operating conditions, and our engineers will recommend a material and process.