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PCB Fabrication
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# PCB Fabrication
An index to what happens between a released Gerber package and a board that passes final inspection: lamination, drill, plating, imaging, finish, and the process limits that decide what is buildable.
[Discuss your requirements ↗](https://www.chinasuqi.com/en/request-a-quote/)
## What this section is for
Fabrication is the part of a PCB order where the buyer has the least visibility and the most exposure. By the time a defect is detectable at incoming inspection, the panels are already cut, the money is already committed, and the schedule has already been consumed.
This section explains the sequence in enough detail that a buyer can tell where a problem could have been caught, and a designer can tell which of their decisions created the risk. It is written from the process side, which means it says unflattering things about designs as well as about factories.
## The sequence, and where it goes wrong
A rigid multilayer board passes through inner-layer imaging, lamination, drilling, plating, outer-layer imaging, solder mask, surface finish, routing and electrical test. Each stage can only fix its own defects; none can fix the previous one.
That is the organising principle of this section. A drill breaks out of a pad because the annular ring was thin, which is an imaging decision, which is a design decision. The drill is where it becomes visible, not where it becomes true.
## Where to start
### Lamination and its failure modes
The stage with the least visibility and the highest cost of failure on a high-layer build.
[Why high-layer boards delaminate ↗](https://www.chinasuqi.com/en/blog/high-layer-count-pcb-lamination-why-boards-delaminate/)
covers the five mechanisms — moisture, resin flow, bonding surface, press profile, copper imbalance — and the four of them that are decided before the press.
### The stackup that will be built
Lamination is only as good as the construction it is given.
[The reference stackup builds for 4, 6 and 8 layers ↗](https://www.chinasuqi.com/en/blog/pcb-layer-stackup-design-reference-builds-for-4-6-and-8-layers/)
gives arrangements that can be handed to a fabricator, with the thickness and impedance consequences stated, and the symmetry rules that keep a panel flat.
### The cost side of the process
Process tiers, not layer counts, drive most of the price difference between two quotes for the same board.
[Why quotes keep expiring ↗](https://www.chinasuqi.com/en/blog/why-your-2026-pcb-quotes-keep-expiring-the-fr-4-cost-supercycle-explained/)
covers how material movement reaches a quotation, and
[the CCL timeline ↗](https://www.chinasuqi.com/en/blog/ccl-price-increases-2026-a-complete-timeline-of-every-notice/)
records what the laminate market has done through 2026.
### What is checked before the files are opened
The defects that stop a package at review are mostly geometric and mostly the designer's to fix.
[The twelve Gerber defects ↗](https://www.chinasuqi.com/en/blog/gerber-dfm-check-twelve-errors-that-stop-a-file/)
lists them with who fixes each one, and
[the DFM section ↗](https://www.chinasuqi.com/en/blog/dfm-design-rules/)
covers the decisions that set the price before anyone quotes.
## The limits worth asking about
A capability table is a summary of a process, and summaries hide the interesting part. Four limits are worth asking about explicitly, because each one has a range rather than a value.
Minimum annular ring, and whether it is held at the drilled size or the finished size. Minimum copper-to-edge distance, and whether routing or scoring sets it. Maximum aspect ratio, which is what actually limits layer count at a given thickness. Plating thickness distribution across the panel, which decides whether the thin end of the distribution still meets the class.
Ask for the number and the condition. A supplier who answers both has a process he can describe; one who answers only the number has a datasheet.
There is a fifth question worth asking on a first order, and it is not technical: what does the shop do when a panel fails final inspection. Rework, scrap or ship-with-deviation are three different businesses, and the answer predicts your second order better than any capability table.
## What this section will not do
It will not give you a maximum layer count and call it capability. A number without the stackup, the copper weight and the drill geometry attached is not a specification, and a fabricator who leads with one is answering a question you did not ask.
It will also not present a process as risk-free. Plating thickness varies across a panel, registration moves, and drill position is a distribution rather than a point. The honest version of a capability statement describes the range and the control, which is why the pages here quote limits with the conditions attached.
Ask a fabricator what they do when a panel fails final inspection, not whether panels fail. The first answer describes a process; the second describes a sales position.
## What we can and cannot do
We build rigid, HDI, flex, rigid-flex and heavy-copper boards, and we will tell you when a requested construction is at the edge of the process rather than inside it — including when that answer costs us the order.
What we cannot do is build to a drawing that contradicts itself, or guarantee an outcome that depends on how the board is stored and assembled after it leaves us. The fabrication side of the order ends at final inspection; the assembly side continues the same board's history, and
[the assembly section ↗](https://www.chinasuqi.com/en/blog/pcba-assembly/)
covers where that handover should be specified.
CONTINUE YOUR REVIEW
## Related manufacturing resources
guide
### [Multilayer PCB Manufacturing: Why High-Layer Boards Delaminate ↗](https://www.chinasuqi.com/en/blog/high-layer-count-pcb-lamination-why-boards-delaminate/)
Delamination in high-layer-count boards is rarely a pressure problem. It is moisture, resin flow, bonding surface, press profile or copper imbalance. Five mechanisms, the symptoms each one leaves, and the control point that prevents it.
guide
### [PCB Layer Stackup Design: Reference Builds for 4, 6 and 8 Layers ↗](https://www.chinasuqi.com/en/blog/pcb-layer-stackup-design-reference-builds-for-4-6-and-8-layers/)
Four working stackups you can hand to a fabricator, what each one costs, and the three constraints that override any drawing: impedance target, finished thickness and copper weight.
guide
### [Why Your 2026 PCB Quotes Keep Expiring: The FR-4 Cost Supercycle Explained ↗](https://www.chinasuqi.com/en/blog/why-your-2026-pcb-quotes-keep-expiring-the-fr-4-cost-supercycle-explained/)
Quote validity fell from sixty days to seven because laminate, not labour, now drives the price. What moved in 2026, why glass cloth is the bottleneck, and how to read a quote that will still be valid next quarter.
guide
### [Gerber DFM Check: Twelve Errors That Stop a File at Review ↗](https://www.chinasuqi.com/en/blog/gerber-dfm-check-twelve-errors-that-stop-a-file/)
Twelve defects that show up in a Gerber package before fabrication starts, what each one costs if it survives to the drill, and which of them only the designer can fix.
guide
### [CCL Price Increases 2026: A Complete Timeline of Every Notice ↗](https://www.chinasuqi.com/en/blog/ccl-price-increases-2026-a-complete-timeline-of-every-notice/)
A dated record of copper clad laminate price notices in 2026: who raised what, by how much, which grade, and what it did to a bare-board price. With methodology notes on why the published series disagree.
Explore
### [DFM and Design Rules ↗](https://www.chinasuqi.com/en/blog/dfm-design-rules/)
An index to the design decisions that set the price of a board before anyone quotes it: stackup, hole size, annular ring, clearance, surface finish and panelisation, in the order they should be decided.
YOUR NEXT PCB PROJECT
## Let’s define your next build.
Start with your files, requirements and target date.
[Prepare a PCB inquiry ↗](https://www.chinasuqi.com/en/request-a-quote/)

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