LED PCB

CUSTOM LIGHTING · PCB FABRICATION & ASSEMBLY

LED PCB manufacturing.
Built around your light.

SLLPCB supplies custom LED circuit boards, LED component sourcing and PCB assembly. Bring the light source, heat path and mechanical requirements together before the board goes into production.

Bare boards · Component sourcing · SMT assembly · Lighting tests

Round LED board · White solder mask · Custom mounting

Manage heat

Connect the LED thermal pad to a defined heat path.

Protect isolation

Match the dielectric and clearances to the electrical design.

Build consistently

Review the board, components and acceptance plan together.

LIGHTING STARTS WITH THE BOARD

Different lights. Different board priorities.

Board shape is only the starting point. LED spacing, mounting, current and temperature determine what the construction needs to do.

Round boards & LED arrays

Coordinate the LED layout, mounting holes, connector position and contact to the heatsink. Concentrated arrays need particular attention to the heat path beneath the LEDs.

Linear lighting boards

Check repeated LED pitch, current distribution, long-board flatness and breakaway features. The board needs to fit the fixture and remain practical to assemble.

UV & compact modules

Start with the LED package, operating conditions and local heat density. Select the board construction around electrical isolation, thermal transfer and the available mounting area.

MATERIAL SELECTION

Choose the construction for the complete project.

LED PCB describes the application. The right substrate depends on the thermal load, routing, insulation, mounting and overall build cost.

Construction	Useful starting point	Decision to resolve
FR-4	Indicators, controls and distributed LEDs	Copper spreading, thermal vias and the external cooling path.
Aluminum MCPCB	Lighting arrays transferring heat into a heatsink or housing	Dielectric system, electrical isolation, base thickness and mounting contact.
Copper-core PCB	Concentrated heat sources and demanding thermal paths	Heat-spreading benefit against weight, material and machining cost.
Ceramic PCB	Compact modules with demanding thermal and insulation requirements	Al₂O₃ or AlN selection, attachment method and mechanical stress.
Flexible PCB	LED strips and curved installation paths	Bend requirements, current distribution and the thermal connection to the fixture.

Explore the construction details: aluminum PCB, metal core PCB, ceramic PCB and flexible PCB.

THERMAL DESIGN

Give heat a clear way out.

The metal base is one part of the thermal system. Heat must move from the LED package through the solder joint, copper pad and dielectric, then into the base, thermal interface and heatsink.

Start with the operating conditions.

Provide the LED package, drive current, heat-source layout, ambient temperature and available cooling surface. These inputs make the material and mounting decision meaningful.

Review the interfaces.

Dielectric thickness, pad geometry, solder contact, board flatness and the heatsink interface all influence the final temperature. Increasing base-metal conductivity alone does not remove a bottleneck elsewhere.

Copper → Dielectric → Metal base

The dielectric transfers heat while isolating the circuit from the metal base. The mounting interface carries that heat into the cooling structure.

FABRICATION CAPABILITIES

The details behind the board.

Aluminum LED PCB fabrication combines the circuit requirements with metal-base processing, insulation and the mounting geometry.

Aluminum LED PCB

Single-layer and multilayer constructions for lighting boards. Define the circuit, dielectric, metal base, surface finish and mechanical drawing as one release package.

1–8

Circuit layers

Aluminum PCB construction

1–5 oz

Copper thickness

Copper weight for the circuit

Fabrication parameter	Capability
Circuit layers	1–8 layers
Maximum board size	1170 × 427 mm
Board thickness	0.3–3.0 mm
Copper thickness	1–5 oz
Minimum line / space	4 mil / 4 mil
Minimum hole size	0.80 mm
Aluminum base	Al 1000 / 3000 / 5000 / 6000 series
Surface finish	HASL, ENIG, OSP
Thermal Dielectric	0.5–385 W/m·K

PCB assembly size

Up to 500 × 500 mm for PCB assembly. Specify the individual board and delivery panel dimensions in the assembly files.

CAM engineering · Manufacturing data review

ENGINEERING BEFORE PRODUCTION

Resolve the details before they become rework.

The manufacturing review connects the electrical design to the actual board, tooling and assembly process.

Pads, copper & isolation

Check LED footprints, thermal pads, polarity, current paths, spacing and separation from the metal base.

Outline, holes & mounting

Review hole and slot locations, edge features, contact surfaces and the flatness needed for the fixture.

Panelization & assembly access

Set the panel layout, breakaway method, process rails and access around components and connectors.

BARE BOARD TO LED PCBA

Define the build. Keep the handoffs clear.

Choose bare-board fabrication, or combine PCB manufacturing with LED component sourcing and SMT assembly.

PCB fabrication

Release the Gerber or ODB++ data, drill files, drawing, stackup, copper, solder mask and finish. Include mounting and insulation requirements in the fabrication package.

LED component sourcing

Use the BOM to specify manufacturer part numbers, package, flux and color bins, driver parts and connectors. Record the component requirements that affect the finished light.

SMT assembly

Provide the placement data, assembly drawing and polarity. Review the solder-paste and reflow requirements with the board thermal mass and LED package in mind.

The LED specification belongs in the BOM.

LED part number and bin requirements guide component sourcing. Luminous flux, CCT, CRI and operating current define the lighting result to measure. A 2700–6500 K CCT target or a Ra ≥80 design target belongs to the product specification.

INSPECTION & VALIDATION

Measure the board. Then measure the light.

Electrical connectivity, solder quality, optical output and operating temperature answer different questions. Define each acceptance criterion for the deliverable you need.

Automated optical inspection

Circuit, assembly and application checks.

Bare-board electrical and dimensional checks verify the circuit and physical build. AOI and assembly inspection address visible production defects. Powered tests and optical measurements evaluate the assembled lighting board.

Temperature measurements follow the LED case, solder point, board and heatsink so the thermal path can be assessed under operating conditions.

Test	Method / condition	What it checks
Light-up	100% powered inspection	Dead LEDs, dim LEDs and flicker
Burn-in	48–72 hours at rated load	Continuous lighting operation
High-temperature aging	45°C ambient for 48 hours	Operation at elevated ambient temperature
Optical measurements	Integrating sphere and goniophotometer	Luminous flux (lm), CCT, CRI (Ra) and efficacy (lm/W)
Temperature measurements	Infrared imaging and thermocouples	LED case temperature Tc, solder-point, board and heatsink temperatures
Thermal cycling	High- and low-temperature cycling	Solder-joint and structural reliability
Electrical checks	Open/short, insulation and withstand tests	Circuit connectivity and electrical isolation

COST & PRODUCTION

Compare the complete build.

A useful quotation includes the board construction, assembly scope and acceptance plan. Keep these inputs consistent when comparing suppliers.

Material & insulation

Set the construction

Base metal, dielectric system, copper and finish influence material and process cost.

Geometry & panels

Use the material well

Outline, length, routing, slots and panel utilization affect the manufacturing route.

LEDs & components

Define the BOM

Exact part numbers, bin requirements, sourcing and assembly quantity shape the component cost.

Testing & release

Set the acceptance plan

Fixtures, burn-in, optical measurements and reliability work affect the total project scope.

Carry the approved build into repeat production.

Use a controlled drawing revision, BOM, construction and test specification for the sample and subsequent batches. Record material or component changes against that approved release.

PROJECT QUESTIONS

A few things to settle before the build.

Practical answers for material selection, LED specifications, files and quotation.

When should I use an aluminum LED PCB?

An aluminum PCB is a useful starting point when the LED circuit needs a short heat path into a heatsink or fixture housing. Select the dielectric, copper, board geometry and mounting together. FR-4 can remain suitable for lower thermal loads or designs with a well-defined copper and thermal-via path.

Is copper always better than aluminum for LED boards?

Copper can spread concentrated heat effectively, but it adds weight and material cost. The dielectric and mounting interface can still limit the result. Compare the complete thermal path and the temperature requirement before changing the base metal.

What is the difference between an LED PCB and LED PCB assembly?

The bare LED PCB contains the circuit, substrate, solder mask and surface finish. LED PCB assembly adds the specified LEDs, drivers and other components through sourcing and placement, followed by inspection and the defined lighting tests.

Which files are needed for an LED PCB quote?

For bare boards, send Gerber or ODB++ data, drill files, a fabrication drawing, quantity, material and finish requirements. For assembly, add the BOM with manufacturer part numbers, placement data, assembly drawing, LED polarity and bin requirements, and the test specification.

How should I specify LED color and brightness?

Include the exact LED manufacturer part number and the required flux, CCT and voltage bins in the BOM. Define the target luminous flux, CCT, CRI and operating current for the assembled board so the optical measurements can be judged against the product specification.

What affects LED PCB cost and production timing?

Material grade, dielectric system, copper thickness, board outline, panel utilization, quantity, LED availability and the test program all influence the build. Release the BOM, construction and acceptance criteria together so the quotation covers the required deliverable.

START YOUR LED PCB PROJECT

Bring us the board.
And the job it needs to do.

Tell us the lighting application, dimensions, quantity, operating conditions and whether you need bare boards or assembled LED PCBAs.

For bare boards

Gerber / ODB++, drill files, fabrication drawing, material, copper, finish and quantity.

For LED assembly

BOM, manufacturer part numbers and bins, placement data, assembly drawing, polarity and test requirements.

sales@sllpcb.com

LED PCB manufacturing.Built around your light.