Features	Capability	Description	Patterns
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 EAZYPCB Impedance Calculator EAZYPCB Impedance Calculator
Material	FR-4	Grade A laminates from suppliers including Nan Ya, KB, Shengyi and etc.
	Aluminum-Core	1-layer Aluminum-core PCBs
	Copper-Core	1-layer copper-core PCBs with direct heatsink contacts (≥ 1 × 1 mm)
	RF PCB	1 oz copper, 2-layer RF PCBs with Rogers and PTFE cores
FR-4 Dielectric Constants	4.5 (2-Layer PCB)	7628 Prepreg 4.4 3313 Prepreg 4.1 2116 Prepreg 4.16
Maximum Dimensions	FR4 PCB: 670 × 600 mm Rogers / PTFE Teflon PCB: 590 × 438 mm Aluminum PCB: 602 × 506 mm Copper PCB: 480 × 286 mm	These limits apply to PCBs with thickness ≥ 0.8 mm. The thinner FR4 PCBs are 500 × 600 mm maximum. 2-layer FR4 PCBs can reach a maximum size of 1020 × 600 mm.
Minimum Dimensions	Regular: 3 × 3 mm. Castellated / Plated Edges: 10 × 10 mm.	These limits apply to PCBs with thickness ≥ 0.6 mm. Manual review required for thinner PCBs. Panelization is recommended for small-sized boards.
Dimension Tolerance	±0.1mm	±0.1mm(Precision) and ±0.2mm(Regular) for CNC routing, and ±0.4mm for V-scoring
Thickness	0.4 - 4.5 mm	Thickness for FR4 are: 0.4/0.6/0.8/1.0/1.2/1.6/2.0 mm (2.5 mm and above are for 12+ layer PCBs only)
Thickness Tolerance (Thickness≥1.0mm)	± 10%	e.g. For the 1.6mm board thickness, the finished board thickness ranges from 1.44mm(T-1.6×10%) to 1.76mm(T+1.6×10%)
Thickness Tolerance (Thickness<1.0mm)	± 0.1mm	e.g. For the 0.8mm board thickness, the finished board thickness ranges from 0.7mm(T-0.1) to 0.9mm(T+0.1).
Finished Outer Layer Copper	1 oz / 2 oz (35um / 70um)	Finished copper weight of outer layer is 1oz or 2oz.
Finished Inner Layer Copper	0.5 oz / 1 oz / 2 oz (17.5um / 35um / 70um)	Finished copper weight of inner layer is 0.5oz by default.
Soldermask	Green, Purple, Red, Yellow, Blue, White, and Black.	We use LPI (Liquid Photo Imageable) solder mask. This is the most common type of mask used today. Heat-cured ink soldermask is usually found on low-cost, single-sided PCBs.
Surface Finish	HASL (leaded /lead-free), ENIG, OSP (copper core boards only)	FR4 has all three finishes available, 6+ layers and RF boards only have ENIG. Aluminum core boards only have HASL. Copper core boards only have OSP.