Know your board before you send the Gerbers.
PCB Production is a free reference for PCB designers and electronic engineers — a plain explanation of how rigid and flex circuit boards are actually built, what pushes their price up or down, and two calculators to put a number on it before you file for quote.
Simplified cross-section of a 4-layer rigid board — the same stack logic scales to 2 or 20+ layers.
How a rigid circuit board gets made
Ten steps turn a copper-clad laminate panel into a tested, finished board. Each one is also where a design choice quietly becomes a line item — noted alongside.
Gerbers, drill files and the BOM are checked against the fab's design rules — minimum trace/space, annular ring, aspect ratio, edge clearance — before any material is touched.
A photosensitive dry-film resist is laminated onto the copper-clad core and exposed through a photoplotted mask, defining exactly where copper will survive as traces and pads.
Unexposed copper is chemically dissolved away in a cupric-chloride or ammoniacal bath, leaving only the protected circuit pattern behind.
CNC (mechanical) or UV laser drills cut every through-hole, blind via and buried via that will eventually carry a signal or a component lead between layers.
Holes are chemically seeded, then electrolytically plated with copper, turning a drilled hole into a reliable electrical connection between layers.
A liquid photoimageable (LPI) polymer is coated and cured over the copper, exposing only the pads — protecting traces and stopping solder bridges during assembly.
Reference designators, polarity marks and logos are printed — usually white or yellow ink — to make the board readable during assembly and rework.
Exposed copper pads get a finish — HASL, ENIG, OSP, immersion silver/tin — so they stay solderable between fabrication and assembly, sometimes months later.
Every board is tested against the netlist — flying probe for low volume, bed-of-nails fixtures at production volume — to catch shorts and opens before they ship.
Finished boards are routed or V-scored out of the production panel, edges are deburred, and the panel's unused area becomes part of your unit cost.
What actually drives PCB cost
Fabs quote per panel, not per spec sheet — but every spec on that sheet moves the panel price. These are the twelve that matter most, roughly ordered by how much control you have over them.
Each added layer means another lamination cycle, imaging pass and drill run. Going from 2 to 4 layers usually moves unit price more than any single option below.
Standard FR-4 is the baseline. High-Tg FR-4, RF laminates like Rogers/PTFE, and aluminium-core boards for thermal loads all carry a material premium on top.
Microvias, blind/buried vias and via-in-pad each need an extra lamination or drilling cycle compared with a standard mechanically-drilled through-hole via.
Engineering and tooling costs are fixed per job, so unit price drops sharply between prototype runs (5–10 pcs) and production volumes (500+).
Controlled impedance, gold-finger edge connectors and controlled-depth routing all add dedicated engineering and process steps beyond a standard build.
Heavier copper (2 oz, 3 oz) for power-carrying boards needs longer, more tightly controlled etch cycles than the standard 1 oz.
HASL is the cheapest option. OSP and immersion tin/silver sit mid-range; ENIG and ENEPIG cost more but give flatter pads for fine-pitch parts.
Going tighter than roughly 4 mil / 4 mil (0.1 mm) trace and space pushes a board onto a more advanced — and costlier — production line.
Fabs price by the production panel. An outline that tiles awkwardly wastes panel area, which shows up as a higher effective cost per board.
Standard runs share panel space and machine time efficiently. 24–48 hour expedite service typically carries a 30–100% premium over standard.
Flying-probe testing needs no fixture and suits low volume. Bed-of-nails fixtures cost more upfront but get cheaper per board at real production volume.
Green is the fab's default ink and the cheapest option. Black, white, red, blue or matte finishes can add cost and occasionally lead time.
Rigid PCB price calculator
Adjust the specs below and watch the estimate move — the point is to see which choices matter, not to replace a formal quote.
Budgetary estimate only. Built from typical industry cost relationships to show what moves your price — not a manufacturer quotation.
Get an exact quote from PCBSync ↗Flex PCB price calculator
Flex and rigid-flex builds price differently — polyimide, coverlay and stiffeners replace some of the rigid stack, at a real cost premium.
Budgetary estimate only. Flex tooling (laser-cut coverlay, stiffener lamination) varies more by shop than rigid — treat this as a starting point.
Get an exact quote from PCBSync ↗Rigid vs. flex vs. rigid-flex, at a glance
The right construction is set by the mechanical problem first — cost follows from that choice, not the other way around.
| Spec | Rigid PCB | Flex PCB | Rigid-flex |
|---|---|---|---|
| Substrate | FR-4, high-Tg FR-4, Rogers, aluminium | Polyimide film | FR-4 zones + polyimide zones |
| Typical thickness | 0.4 – 3.2 mm | 0.05 – 0.3 mm | Varies by zone |
| Common layer range | 1 – 20+ layers | 1 – 6 layers | 4 – 20+ layers |
| Flexibility | None — rigid in service | Dynamic or static bending | Rigid zones, flexing interconnects |
| Typical use cases | General electronics, power supplies, motherboards | Wearables, cameras, foldable connectors | Aerospace, medical, compact folding assemblies |
| Relative cost per area | 1× (baseline) | ~2.5 – 4× | ~4 – 7× |
| Typical lead time | 24 hrs – 2 weeks | 5 days – 3 weeks | 2 – 4 weeks |
From estimate to a real quote
These tools exist to make you a sharper buyer — the two links below take you to where the actual manufacturing happens.
PCB Manufacturer
PCBSync fabricates the rigid and flex boards this site's calculators are modelled on. Upload Gerbers for an exact, DFM-checked quote.
Visit PCBSync ↗PCB
For a second reference point on rigid PCB manufacturing capabilities and specs, see RayPCB.
Visit RayPCB ↗