PCB Stack-Up, Explained From the Cross-Section

A stack-up is the sandwich your board is pressed from: copper layers separated by prepreg and core. It decides thickness, impedance behaviour and whether your board can be built at all.

Useful details before decorative ones.

01 / Standard builds1

Standard builds

4L, 6L and 8L stack-ups

02 / Thickness range2

Thickness range

0.4 to 3.2 mm

03 / Materials3

Materials

FR-4 (Shengyi, Kingboard)

04 / Check4

Check

Stack-up reviewed against your files

05 / In this guide5

In this guide

Cross-sections for each layer count

2 layers

One core, copper on both sides. The prototype workhorse: cheap to iterate and fast to build.

4 layers

Routing room plus dedicated power and ground planes. The most common step up when two layers stop working.

6 to 8 layers

More signal layers for dense designs. Tell us the target finished thickness in your first message.

When you request a quote, give us the layer count and finished thickness. If your files imply a stack-up we cannot press, the review flags it before money moves.

Multilayer fabrication

Multilayer PCB fabrication from 4 to 8 layers: FR-4 stack-ups, 0.075 mm trace and space, ENIG, HASL and OSP finishes, prototype lead times from 5 to 7 working days.

Multilayer fabrication

FAQ

Questions buyers ask before they place the order

Still need help? Send us a note and we will point you in the right direction.

Related

Get a price on your board

Email your Gerber and drill files to midst_zhong@126.com with layers, thickness, copper, finish and quantity — or start with the form and just the basics. Free engineer DFM check with every quote.