HDI PCB

18 Layers 3+N+3 Structure (L1-3;L2-6;L4-8;L8-11;L11-15;L13-17;L17-18) HDI PCB

18 Layers 3+N+3 Structure is a 18-layer construction on FR4 TG170, delivered at 3.6 mm with ENIG 1u over green solder mask and white legend. Manufacturing tolerance is driven by a 3+N+3 sequential-lamination structure, copper geometry held to 2.8 mil line width and 2.8 mil spacing, mechanical holes from 0.15 mm. Acceptance is 100% AOI, ICT and FCT testing against IPC-A-610 E Class II, with thickness to ±10% and outline by Rout / V-cut / Bridge / Stamp Hole. The part ships into industrial control applications.

  • Layers18 Layers (Max 64 Layers)
  • Base materialFR4 TG170
  • Finished thickness3.6 mm (Max 8mm)
  • Surface finishENIG 1u
  • Min. line width / spacing2.8 mil (Min 2mil) / 2.8 mil (Min 2mil)

Quotation within 6 hours. Gerber, PowerPCB, CAD, AutoCAD, OrCAD, P-CAD, CAM-350 and CAM2000 files accepted.

What matters on this build

3+N+3 HDI structure

The 3+N+3 build needs sequential lamination and laser via formation; our window runs to 5+N(N+M)+5 with 1.6/1.6 mil trace.

18-layer construction, scalable to 64 layers

This part is 18-layer; the same presses run 1 to 64 layers, so a stack-up revision does not force a supplier change.

FR4 TG170 laminate

Built on FR4 TG170 — FR4 — drawn from over 120 laminate types held in the warehouse, from KB and ITEQ through Rogers, Isola and Panasonic.

2.8 mil / 2.8 mil line width and spacing

Etched to 2.8 mil width and 2.8 mil spacing here; the process floor is 2/2 mil inner at 1/3 oz copper, with ±10% accuracy on impedance layers.

ENIG 1u surface finish

Finished with ENIG 1u. ENIG 1–3 μin, ENEPIG, hard gold to 3.0 μm, immersion silver, immersion tin, OSP and lead-free HASL are all in-house.

Full specification as manufactured

These are the parameters this part was quoted, tooled and shipped against.

ParameterValue
PCB TypeHDI PCB
Number of Layers18 Layers (Max 64 Layers)
Finished Thickness3.6 mm (Max 8mm)
Base MaterialFR4 TG170
Copper Thickness1 oz
Min. Mechanical Hole0.15 mm (Min 0.1mm)
Min. Line Width2.8 mil (Min 2mil)
Min. Line Spacing2.8 mil (Min 2mil)
Surface FinishingENIG 1u
Solder MaskGreen
Silk ScreenWhite
Thickness Tolerance±10%
Impedance Control Accuracy±10% (min±5%)
Testing Service100% AOI ICT FCT Testing
Special ProcessesNo
PCB StandardIPC-A-610 E Class II
Brand NamePEAK PCB
Place of OriginShenzhen, Guangdong, China
Packaging InnerVacuum Packing/ Anti-Static Package
Packaging OuterExport Carton/ Customizable
PortShenzhen,Hongkong
Supply AbilitySample and Mass Production
Finished Inner Copper ThicknessHoz (Max 14oz)
Finished Outer Copper Thickness1oz (Max 14oz)
Outline ProfileRout/ V-cut/ Bridge/ Stamp Hole
ApplicationIndustrial Control
Acceptable File FormatGerber file, Powerpcb, CAD, AUTOCAD, ORCAD, P-CAD, CAM-350, CAM2000

Questions engineers ask about this board

Can this design be scaled beyond 18 layers?

Yes. This part is quoted at 18 layers and the plant fabricates 1 to 64 layers, including sequential-lamination HDI up to 5+N(N+M)+5.

Can a different laminate be substituted for FR4 TG170?

It can. FR4 TG170 is what this part is built on, but material is a design input — Rogers, Arlon, Taconic, Isola, Nelco, Panasonic, TUC, ITEQ, SYTech, Ventec and KB grades are all stocked, and customer-supplied stock is accepted.

Is ENIG 1u the only surface finish offered on this board?

No. ENIG 1u is specified here; ENIG at 1–3 μin gold, ENEPIG, hard gold to 3.0 μm, immersion silver, immersion tin, OSP and lead-free HASL are alternatives, subject to panel size limits on HASL.

What files do you need to quote this part?

Gerber RS-274X plus a drill file and a stack-up or impedance note. PowerPCB, CAD, AutoCAD, OrCAD, P-CAD, CAM-350 and CAM2000 formats are also accepted. Quotation normally comes back within 6 hours.

Other builds in HDI PCB

Get this board quoted

Send the part number or your own Gerber set. An engineer replies with price, lead time and any DFM comments — usually inside 6 hours.