ENIG deposits a nickel-gold coating on exposed pads to prevent oxidation.

See the PI Stiffener Thickness Calculator

Additional tolerance exists for stiffeners. Thicker stiffeners have larger tolerances.

The recommended maximum diameter for PTHs is 5 mm, if bigger may cause risks to production

Example: A 1.00 mm designed diameter is allowed to yield any physical diameter between 0.92-1.08 mm.

At least 0.2 mm copper clearance is required around non-plated slots.

Example: A 0.10 mm designed trace width is allowed to yield any physical width between 0.08-0.12 mm.

The clearance from an NPTH to traces, pads, and copper pours

PI stiffeners are most often used with gold finger connectors. For example if the connector needs to be 0.3 mm thick on a 0.1 mm FPC, a 0.225 mm stiffener thickness is most suitable.

FR4 is usually only used on low-end products because it is prone to chipping. Avoid if possible.

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Absolute limit of 250 x 500 mm allowed with mandatory handling edges – confirm with customer support before ordering

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The thickness of the finished FPC excluding any stiffeners(if the measured area has no copper or coverlay, the finished thickness will be reduced.)

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Steel stiffeners cost more but have excellent flatness and do not easily deform. This makes them good as support under SMD components. Note that the steel is slightly magnetic it should not be used with hall sensors.

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Currently we don\t support Blind/Buried Vias, only make through holes.

Holes with diameter ≥ 6.3 mm are CNC routed from a smaller drilled hole. Min. drill diameter for 2- or more-layer PCBs is 0.15 mm (more costly!). Min. drill diameter for aluminum-core PCBs is 0.65 mm. Min. drill diameter for copper-core PCBs is 1.0 mm

2-layer: 0.038 mm expansion on each side of a pad. Keep at least 0.05 mm clearance between soldermask openings and neighboring traces.

Multilayer: No expansion required

Note: this rule does not conflict with Pad to track clearance Min. 0.1 mm

1- and 2-layer: 0.10 / 0.10 mm (4 / 4 mil)

Multilayer: 0.09 / 0.09 mm (3.5 / 3.5 mil). 3 mil is acceptable in BGA fan-outs.

① Copper clearance from routed board edges: ≧0.2 mm

② Copper clearance from routed slots: ≧0.2 mm

③ Dimension tolerance for routed board edges: ±0.2 mm (regular precision); ±0.1 mm (high precision)

Grade A laminates from suppliers including Nan Ya, KB, Shengyi, etc.

1-layer copper-core PCBs with direct heatsink contacts to core (≥ 1 × 1 mm)

1 oz copper, 2-layer RF PCBs with Rogers and PTFE cores

User Guide to the JLCPCB Impedance Calculator

e.g. for the 0.6mm hole size, the finished hole size between 0.52mm to 0.73mm is acceptable.

e.g. for the 1.00mm Non-Plated hole, the finished hole size between 0.80mm to 1.20mm is acceptable.

Characters width less than 6mil(0.153mm) will be unidentifiable.

Features	Capability	Description
Material	Aluminum-Core	1-layer Aluminum-core PCBs
	FR-4	Grade A laminates from suppliers including Nan Ya, KB, Shengyi, etc.
	Copper-Core	1-layer copper-core PCBs with direct heatsink contacts to core (≥ 1 × 1 mm)
	RF PCB	1 oz copper, 2-layer RF PCBs with Rogers and PTFE cores
Layer count	1-32 Layers	The number of copper layers in the PCB
Controlled Impedance	4/6/8/10/12/14/16/18/20/.../32 layers	User Guide to the JLCPCB Impedance Calculator
Minimum Line Width	6 mil (0.153mm)	Characters width less than 6mil(0.153mm) will be unidentifiable.

Capabilities for PCB Manufacturing
& Assembly

pcb specifications

drilling

traces

soldermask

legend

outline