Rigid-Flex PCB

4 Layers 1+N+1 Structure (L1-2;L2-3;L3-4) Small Format ENIG HDI Rigid-Flex PCB

A 4-layer Rigid-Flex & HDI PCB built on FR4 S1000-2M, profiled to 1.6 mm finished thickness and plated with ENIG 1u over green solder mask and white legend. The process window is set by a 1+N+1 sequential-lamination structure, copper geometry held to 3.0 mil line width and 3.0 mil spacing, mechanical holes from 0.15 mm. Panels ship against IPC-A-610 E Class II after 100% AOI, ICT and FCT testing; outline by Rout / V-cut / Bridge / Stamp Hole and thickness to ±10% are recorded. It is specified for electronic device builds.

  • Layers4 Layers (Max 64 Layers)
  • Base materialFR4 S1000-2M
  • Finished thickness1.6 mm (Max 8mm)
  • Surface finishENIG 1u
  • Min. line width / spacing3.0 mil (Min 2mil) / 3.0 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

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.

4-layer construction, scalable to 64 layers

This part is 4-layer; the same presses run 1 to 64 layers, so a stack-up revision does not force a supplier change.

FR4 S1000-2M laminate

Built on FR4 S1000-2M — FR4 — 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.

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 TypeRigid-Flex & HDI PCB
Number of Layers4 Layers (Max 64 Layers)
Finished Thickness1.6 mm (Max 8mm)
Base MaterialFR4 S1000-2M
Copper Thickness1oz
Min. Mechanical Hole0.15 mm (Min 0.1mm)
Min. Line Width3.0 mil (Min 2mil)
Min. Line Spacing3.0 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
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 4 layers?

Yes. This part is quoted at 4 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 S1000-2M?

It can. FR4 S1000-2M 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 Rigid-Flex 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.