SUB PCB

HL832N 4 Layers 0.25mm Thickness Hoz Green ENEPIG EMMC Substrate PCB

Built as a 4-layer stack on HL832N, this board leaves the line at 0.25 mm thickness under ENEPIG over green solder mask. The demanding part of this build is copper geometry held to 25 μm line width and 25 μm spacing, mechanical holes from 75 μm, finished copper at ½ oz / ½ oz. Every panel is released on 100% AOI, ICT and FCT testing to IPC-A-610 E Class III, holding outline by Rout / V-cut / Bridge / Stamp Hole. Typical end use is USB flash drives and storage devices.

  • Layers4 Layers (Max 64 Layers)
  • Base materialHL832N
  • Finished thickness0.25 mm (Max 8mm)
  • Surface finishENEPIG
  • Min. line width / spacing25um / 25um

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

What matters on this build

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.

HL832N laminate

Built on HL832N — engineered laminate — drawn from over 120 laminate types held in the warehouse, from KB and ITEQ through Rogers, Isola and Panasonic.

25 μm / 25 μm line width and spacing

Etched to 25 μm width and 25 μm spacing here; the process floor is 2/2 mil inner at 1/3 oz copper, with ±10% accuracy on impedance layers.

ENEPIG surface finish

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

Hole sizes from 75 μm mechanical

Drilling covers 0.15 mm mechanical and 0.076 mm laser holes, backdrill to ±0.1 mm and depth control to 0.05 mm.

Full specification as manufactured

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

ParameterValue
PCB TypeSubstrate PCB
Number of Layers4 Layers (Max 64 Layers)
Finished Thickness0.25 mm (Max 8mm)
Base MaterialHL832N
Copper ThicknessHoz
Min. Hole75um
Min. Line Width25um
Min. Line Spacing25um
Surface FinishingENEPIG
Solder MaskGreen
Silk ScreenNo
Thickness Tolerance±5%
Impedance Control Accuracy±10% (min±5%)
Testing Service100% AOI ICT FCT Testing
Special ProcessesNo
PCB StandardIPC-A-610 E Class III
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 ThicknessHoz (Max 14oz)
Outline ProfileRout/ V-cut/ Bridge/ Stamp Hole
ApplicationUSB Flash Drives and Storage Devices
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 HL832N?

It can. HL832N 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 ENEPIG the only surface finish offered on this board?

No. ENEPIG 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 SUB 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.