An LED PCB copy takes a physical light engine board — usually single-sided aluminum, sometimes FR4 or a flex strip — and turns it back into manufacturable files: Gerbers, drill data, stackup with dielectric thickness, and a BOM that identifies the LEDs and driver parts by real part number. You send the board, we measure it, and the output is checked against the original before it ships. Most LED boards are electrically simple and thermally fussy, and that changes what matters during the copy.
What makes an LED board different from a normal two-layer copy
Electrically, a typical LED module is boring: strings of emitters in series, a few current-set resistors, maybe a constant-current driver IC and an electrolytic on the input. Net extraction on a single-sided aluminum board takes an afternoon. The hard part is everything that isn’t in the netlist.
Copper thickness on LED boards is often 1 oz to 2 oz, and sometimes heavier on high-current linear strips. Get that wrong and your copy runs hotter than the original at the same drive current, because the copper is doing part of the heat spreading. We measure copper with a cross-section or by weighing a known area, not by eyeballing the trace and guessing.
Then there’s the dielectric. On a metal-core board, the thin insulating layer between the copper and the aluminum plate is the whole thermal story. Thickness is typically in the 75–150 µm range on general lighting boards, thinner on high-power modules, and the resin’s thermal conductivity varies enormously between vendors. We report measured thickness and describe the class of material rather than inventing a datasheet number, so your fabricator can quote a laminate that matches instead of substituting whatever is on the shelf.
Thermal pad geometry is part of the design, not cosmetics
The exposed thermal pad under a mid-power or high-power LED, its via pattern if the board is FR4, and the size of the surrounding copper island all set junction temperature. On an FR4 LED board with thermal vias, we count and measure them — diameter, pitch, whether they’re plugged or open, whether they land on a bottom-side pour. Those details get carried into the Gerbers explicitly. Copiers who only trace nets tend to normalize pads to a generic footprint, and the copy then runs 10–15 °C hotter with no visible cause.
How an LED PCB copy actually runs, step by step
- Intake and photography. Both sides, high resolution, plus close-ups of every component marking before anything is touched. If the board is potted or conformally coated, this is recorded before removal.
- Component identification. LED package and marking, driver IC top mark, resistor and cap values, connector series. Emitters are the risky ones — see the limits section below.
- Desoldering and cleaning. Parts come off with controlled heat. Aluminum boards sink heat aggressively, so hot air alone often won’t do it; we use preheat plus a hot plate to avoid lifting pads or scorching the solder mask we still need to read.
- Copper imaging. Mask and silkscreen come off in stages so the copper layer is scanned clean. Position of every pad and outline is captured against a measured reference, not scaled from a photo.
- Stackup and mechanical measurement. Board thickness, aluminum plate thickness, dielectric thickness, copper weight, mounting hole positions and tolerance, outline and any milled or V-cut edges.
- File generation. Gerber set, drill file, paste and mask layers, outline, plus schematic and netlist if you ordered them.
- Verification. Netlist from the generated files is compared point-to-point against continuity readings taken on the original bare board. Pad-for-pad overlay of the new artwork on a scan of the original. Dimensional check against the physical part.
That verification step is the reason we say “verified against the real board.” It is a comparison, not a claim. If a net doesn’t match, we go back to the copper and find out why. For a broader view of how the same discipline applies to denser boards, our power PCB copy work uses the same measure-then-verify order on much heavier copper.
Aluminum, FR4 or flex: what the substrate changes
| Board type | Typical LED use | What drives the effort |
|---|---|---|
| Single-sided aluminum (MCPCB) | Bulbs, downlights, high-bay engines, streetlight modules | Dielectric thickness, copper weight, aluminum plate thickness and finish |
| Double-sided FR4 | Driver-plus-LED combo boards, indicator panels, sign modules | Thermal via arrays, layer registration, mixed high-voltage and low-voltage spacing |
| Flexible / FPC strip | Tape lights, contour and cove lighting | Polyimide thickness, adhesive stackup, panelization and cut length, bend radius |
| Multilayer (4+) | Addressable pixel boards, DALI/DMX controller boards, display tiles | Inner-layer separation, controller firmware questions, dense fine-pitch parts |
Most LED PCB copy jobs land in the first two rows and are genuinely quick. Once you get to an addressable pixel tile or a networked luminaire controller, you’re really doing a mixed job — board duplication plus, potentially, firmware questions on the controller — and the timeline and price change accordingly.
High-voltage spacing on driver-integrated boards
Plenty of LED boards are non-isolated linear or buck drivers with mains on the same substrate as the emitters. When we copy one of these, we don’t just replicate the gaps — we measure them and flag them. Creepage and clearance between the primary side and the LED string, and between traces and the aluminum plate edge, are safety-relevant dimensions. IPC-2221 gives the general electrical-clearance guidance designers work from, and if the original board is marginal against it, you should know that before you build a thousand of them.
Same for the input capacitor and the fusible resistor or fuse. If the original used a part that’s now out of production, we’ll say so at BOM stage instead of putting an unbuyable part number on a spreadsheet.
What to send us, and what comes back
Send this and you’ll get a real answer instead of a range:
- Clear photos of both sides of the board, on a dark, non-reflective background, whole board in frame with nothing cropped off. A ruler or caliper in shot helps.
- Board dimensions — overall length and width or diameter, plus total thickness if you can measure it. Round LED boards: diameter and the mounting hole spacing.
- Close-up of the LED marking and the driver IC top mark. These two identifications carry more weight than everything else on the BOM.
- Drive conditions if you know them: input voltage, forward current per string, expected wattage. This tells us whether copper weight and dielectric spec are critical or forgiving.
- One line on deliverables — Gerber only, Gerber plus BOM, add schematic, or full turnkey through prototype build.
What comes back from us, before any money moves: a feasibility read on the specific board, the deliverable set we’d produce, a lead time, and a price. If something on your board looks like a problem — an unmarked emitter, a sanded-off driver IC, potting over the whole assembly — you hear about it at quote time. Our detail on PCB copy deliverables covers what each file in the handover package is actually for.
Where LED PCB copy gets hard, and where it sometimes fails
Honest constraints, because these are the ones that come up:
- LED binning. We can identify the emitter package and, usually, the family. Exact bin — the specific flux, forward voltage and chromaticity group the original manufacturer bought — is frequently not printed anywhere on the part. A copy can hit the same footprint and drive current and still be visibly different in color temperature. If color match matters, plan on a lighting measurement of the original so you can select a bin deliberately.
- Sanded or relabeled driver ICs. Common on Chinese constant-current controllers. Sometimes we can identify the part from pinout and behavior, sometimes we can only propose a functional equivalent. That’s a real substitution, not a copy, and we’ll label it as such.
- Potted or fully encapsulated modules. Silicone potting usually comes off. Hard epoxy over an aluminum board often does not, not without destroying the copper we need to read. If the encapsulation wins, the answer is no.
- Phosphor and optics. COB LED boards where the phosphor layer is applied on the board itself are not a PCB copy problem, they’re a manufacturing-process problem. We can copy the copper; matching the phosphor deposition is a different vendor conversation.
- Boards with a programmed controller. If your pixel tile or luminaire board has an MCU with code in it, copying the PCB gets you a blank board. Whether the code can be recovered depends entirely on the part and its protection state, and it’s a separate scope of work with its own feasibility answer.
- One damaged sample. A board with lifted pads, burnt traces or a blown region can still be copied, but the missing area has to be reconstructed by inference. Two samples make this dramatically easier. Say so up front if the board is damaged.
Price follows the same logic. Board size, copper weight, whether it’s aluminum or multilayer, component count, how many parts need identification work, and whether firmware is in scope. Those are the levers. A small single-sided aluminum bulb board is at the cheap end of anything we do; a four-layer addressable tile with a locked controller is a different project entirely.
Legitimate use and confidentiality
The LED boards we copy are overwhelmingly boards the customer already owns and needs to keep building: a fixture line whose original Gerbers were lost when the contract manufacturer closed, a discontinued replacement module for installed luminaires, a driver whose controller IC
Working on a board like this?
Send the chip marking or two photos. You get feasibility, lead time and price within 24 hours, and the check costs nothing.
Get a free quote