吃瓜tv / Metal substrate engineering
Metal Core PCB Manufacturing
Select the base, dielectric and cooling path as one design. Compare metal-core board options, check thermal assumptions and send your files for a defined manufacturing quote.
Get a project quoteBare boards or assembly scope 路 Send preliminary files if the stackup is still open.
Choose the thermal construction before choosing the metal
A metal core PCB (MCPCB) uses a metal base or core as part of its thermal and mechanical structure. A common insulated metal substrate (IMS) combines circuit copper, an electrically insulating thermal dielectric and an aluminum or copper base. It moves heat toward a cooling surface; it does not make the heat disappear.
| Starting point | Why consider it | Decision to resolve |
|---|---|---|
| Aluminum PCB | LED PCB modules and lighting bars, plus other cost-sensitive thermal boards. | Dielectric impedance, mounting flatness and cooling budget. |
| Copper core PCB | A design that needs a more conductive base or a reviewed direct thermal path. | Whether the base is the limiting thermal resistance; package-to-base isolation. |
| Iron / steel PCB | A specified ferrous substrate for mechanical or other grade-dependent requirements. | Exact alloy, corrosion protection, weight and magnetic requirements. |
| MCPCB or FR-4? | A product architecture decision before committing to metal. | Routing density and cooling need, evaluated together. |
Thermal conductivity is a material property in W/m路K. Thermal resistance is a particular path in K/W. Quoting a metal鈥檚 conductivity as 鈥渢he board conductivity鈥� hides the dielectric, area, interfaces and heat sink.
Get a planning range without delaying the enquiry
For a simple one-circuit-layer insulated aluminum or copper board, vary quantity and board size to explore a budget scenario. The editable allowances are not current market rates. You can go straight to Contact at any point.
Metal Core PCB Budget Planner
Follow the heat from the component to the sink
Start with heat dissipated by the component, its thermal connection and the hottest local operating condition. For an LED, electrical input and dissipated heat are not identical; use package guidance or a validated power budget.
Select the dielectric and isolation together. A thinner layer may reduce conduction resistance, but it changes the electrical and manufacturing design. Do not replace a qualified material solely because another grade advertises a higher conductivity.
The metal base still needs a controlled mounting path: flat contact, suitable TIM, fastening and adequate heat rejection.
Metal Core PCB Heat Path
Metal Core PCB Thermal Path
The calculator uses one heat-flow area through all layers. It is useful for sensitivity checks, not for spreading resistance or a CFD temperature map. For a full series junction budget use the aluminum thermal planner.
Construction and fabrication details to settle early
| Item | What to specify | Why it changes the board |
|---|---|---|
| Circuit vs base | Finished circuit copper and metal base thickness separately. | Thicker circuit copper affects etching, spacing and current loss; thicker metal mainly changes the mechanical/thermal base. |
| Dielectric | Manufacturer, grade, thickness, thermal test basis and isolation requirements. | A generic 鈥�3 W/m路K鈥� callout does not define a complete laminate. |
| Holes through metal | Non-plated mounting holes, isolated plated holes, or intended ground connections. | A normal plated barrel cannot simply touch a live metal core. |
| Circuit layers | One circuit layer, two-sided insulated construction or a multilayer stackup. | A one-circuit-layer IMS has several physical materials; it is not a three-circuit-layer PCB. |
| Mounting | Keepouts, flatness, screw locations, TIM and exposed-edge treatment. | Burrs, fastening stress and poor contact can defeat the intended insulation or heat path. |
The current metal-core manufacturing capability tables lists base options, dielectric choices, copper-dependent geometry, drilling and finish windows. Combinations need a drawing review; the largest size, finest spacing and heaviest copper are not automatically available together.
For more routing layers, review the multilayer metal-core construction before reusing a simple IMS stackup.
Fabrication reference for the first drawing review
| Parameter | Current capability reference | Review condition |
|---|---|---|
| Metal base | 0.5鈥�3.0 mm; typical options 1.0 / 1.5 / 2.0 mm | Specify the metal grade and finished-board construction. |
| Dielectric thickness | 75 / 100 / 125 碌m | Select with the actual laminate grade and isolation requirements. |
| Dielectric conductivity | 1 / 2 / 3 W/m路K standard; up to approximately 7 W/m路K under review | This is the dielectric property, not the conductivity of the metal or whole board. |
| Finished circuit copper | 1鈥�10 oz process envelope | Copper-dependent geometry and material combinations need confirmation. |
| General line / space | 0.15 / 0.15 mm; 0.10 mm advanced review | Do not combine the finest spacing with the heaviest copper without a construction review. |
Selected values from the metal-core manufacturing capability tables. Those tables retain the full construction-specific windows, including earlier copper-dependent references. This summary is a starting point for an order review, not a guarantee of every parameter combination.
Metal-core board formats and application questions
| Application | What to discuss with engineering |
|---|---|
| LED lighting | LED footprint, dissipated heat, optical spacing, mask requirements and heat-sink interface. |
| Power conversion | Switching losses, insulation, current paths, creepage and package cooling arrangement. |
| Motor / industrial control | Mechanical mounting, vibration and thermal cycling alongside electrical routing. |
| Compact thermal modules | Available cooling surface, localized heat sources and isolation from the enclosure. |
Make the manufacturing and acceptance scope reviewable
An enquiry should result in an agreed stackup, a drawing revision and a test scope. Ask for the applicable material identification and supplier documentation, inspection coverage, electrical test requirements and traceability arrangements.
- Define circuit continuity and isolation separately; agree any circuit-to-base proof test, duration and leakage limit.
- Treat product operating voltage, laminate breakdown data and production test voltage as different requirements.
- For assembly, define thermal-pad soldering, void criteria where applicable, reflow-profile verification and product-level thermal testing.
- Request current ISO 9001 and applicable UL construction information through the quality team; a general certificate is not a qualification of every stackup.
See the metal-core PCB manufacturing process for stage-by-stage checks, quality and supplier-review information for review documents, and PCB assembly services when you need populated boards.
Metal core PCB questions
Is MCPCB the same as aluminum PCB?
MCPCB is a broader family. Aluminum is one base option; copper and specified ferrous constructions also exist. IMS describes an insulating layer between the circuitry and metal in the common construction.
Does a copper base always lower junction temperature substantially?
No. Improvement depends on how much resistance the base contributes. The dielectric, package, mounting interface or heat sink can dominate. Compare the complete path before changing the material.
Can metal-core PCBs carry high current?
They can be designed for power circuits, but the circuit copper geometry and temperature rise still need analysis. A thick metal base is not the circuit conductor. See heavy copper PCB design for conductor thickness and loss.
What determines price and lead time?
The specific laminate, base metal, copper, size and panel yield, machining, isolation construction, tests and quantity. An exact cost and delivery date require files and a material availability check.
Can you quote before my design is complete?
Send the available stackup, outline, quantity and thermal/isolation targets, clearly marked preliminary. Identify what is still open so assumptions can be included in the quotation.
Start with the board and the cooling requirement
Send the released files, or clearly mark preliminary data. Include the points below so the quote describes the board you actually need.
- Gerber or ODB++ data, drill files, outline and revision.
- Base metal / thickness, circuit copper and dielectric grade or target.
- Heat sources, mounting method, isolation and test requirements.
- Prototype and repeat quantities; bare board or assembly scope.
Email sales@raypcb.com if you prefer an email discussion. For a materials specification discussion, see the insulated metal substrate guide.
Technical references
describes the material system. explains board-level thermal design considerations. Apply the data to the actual component and construction.