Free template · custom PCB

The PCB fab spec template — the spec that lives beyond your Gerbers.

A board can pass DRC and still be wrong for the fab. This is the fab-and-assembly spec both houses need. Fill it in yourself — each field has a plain-English hint — or answer a short interview and SpecBuildr fills it in for you.

Fill it in for me → Free · no account · ~5 minutes

The template

Copy it into your doc, or print this page. Every field carries a plain-English hint.

1.0 Board & program

Board / application____________ (what it does and where it lives)

Quantity____________ (prototype run vs. production changes the fab class)

Board size____________ (outline dimensions)

Key components____________ (the hardest things to place — BGAs, connectors, power parts)

Signal class____________ (digital, analog, RF, power — or a mix)

2.0 Stackup & electrical

Layer count____________ (2, 4, 6… and the arrangement if you know it)

Copper weight____________ (1 oz standard; heavier for current)

Controlled impedance____________ (which nets, what impedance — or 'none')

Min trace/space____________ (if your layout pushes below fab standard)

3.0 Fab & assembly

Surface finish____________ (ENIG for fine-pitch/BGA, HASL for cheap and simple)

IPC class____________ (Class 2 commercial, Class 3 when failure isn't an option)

Assembly____________ (SMT one side or both, any through-hole)

Environment____________ (operating temp range, vibration, conformal coating)

4.0 Standards baseline

Fabrication____________ (IPC-6012, acceptance to IPC-A-600)

Assembly____________ (IPC-A-610, class per above)

Pre-quote checklist

Before you send it out, the mistakes vendors see every week:

Stackup is stated, not implied — layer count and order.
Copper weight matches the current — motor phases aren't 1 oz territory.
Impedance nets are named — 'controlled impedance' alone isn't actionable.
Finish matches the parts — fine-pitch BGA wants ENIG's flatness.
Assembly sides and volume stated — it drives stencil and line setup.
IPC class chosen deliberately — Class 3 costs more for a reason.

Or skip the blank page entirely.

Answer a short interview — SpecBuildr fills this exact structure in for you, checked for major violations, ready to send for a quote.

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