HDI PCB

ISOLA FR408HR 1+N+1 Structure (L1-L2;L3-L6;L7-L8) 8 Layers High Speed HDI PCB

A 8-layer High Speed & HDI PCB built on ISOLA FR408HR, profiled to 1.6 mm finished thickness and plated with ENIG 1u over blue solder mask and white legend. The process window is set by a 1+N+1 sequential-lamination structure, Buried Capacitance processing, copper geometry held to 3.0 mil line width and 3.0 mil spacing. Nothing leaves without 100% AOI, ICT and FCT testing; IPC-A-610 E Class II governs workmanship and outline by Rout / V-cut / Bridge / Stamp Hole is logged. It is specified for electronic device builds.

  • Layers8 Layers (Max 64 Layers)
  • Base materialISOLA FR408HR
  • Finished thickness1.6 mm (Max 8mm)
  • Surface finishENIG 1u
  • Min. line width / spacing3.0 mil (Min 2mil) / 3.0 mil (Min 2mil)
  • Special processesBuried Capacitance

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

What matters on this build

1+N+1 HDI structure

The 1+N+1 build needs sequential lamination and laser via formation; our window runs to 5+N(N+M)+5 with 1.6/1.6 mil trace.

Buried Capacitance

Buried Capacitance runs on our own lines alongside POFV, backdrill, edge plating, plated half holes and step gold finger — no second supplier.

8-layer construction, scalable to 64 layers

This part is 8-layer; the same presses run 1 to 64 layers, so a stack-up revision does not force a supplier change.

ISOLA FR408HR laminate

Built on ISOLA FR408HR — low-loss high-speed laminate — drawn from over 120 laminate types held in the warehouse, from KB and ITEQ through Rogers, Isola and Panasonic.

3.0 mil / 3.0 mil line width and spacing

Etched to 3.0 mil width and 3.0 mil spacing here; the process floor is 2/2 mil inner at 1/3 oz copper, with ±10% accuracy on impedance layers.

Full specification as manufactured

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

ParameterValue
PCB TypeHigh Speed & HDI PCB
Number of Layers8 Layers (Max 64 Layers)
Finished Thickness1.6 mm (Max 8mm)
Base MaterialISOLA FR408HR
Copper Thickness1oz
Min. Mechanical Hole0.35 mm (Min 0.1mm)
Min. Line Width3.0 mil (Min 2mil)
Min. Line Spacing3.0 mil (Min 2mil)
Surface FinishingENIG 1u
Solder MaskBlue
Silk ScreenWhite
Thickness Tolerance±10%
Impedance Control Accuracy±10% (min±5%)
Testing Service100% AOI ICT FCT Testing
Special ProcessesBuried Capacitance
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
ApplicationElectronic Device
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 8 layers?

Yes. This part is quoted at 8 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 ISOLA FR408HR?

It can. ISOLA FR408HR 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.