Features Capability Description Patterns
Drill Diameter
1-layer: 0.3 – 6.3 mm
2-layer: 0.15 – 6.3 mm
Multilayer: 0.15 – 6.3 mm
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
Drill diameter diagram
Hole size Tolerance (Plated)
Through-holes: +0.13 / -0.08 mm
Press-fit holes: ±0.05 mm
(multilayer EMI boards only – mention the specific holes in PCB Remark)
e.g. for the 0.6mm hole size, the finished hole size between 0.52mm to 0.73mm is acceptable.
Hole size tolerance diagram
Hole size Tolerance (Non-Plated)
±0.2mm
e.g. for the 1.00mm Non-Plated hole, the finished hole size between 0.80mm to 1.20mm is acceptable.
Non-plated hole tolerance diagram
Average Hole Plating Thickness
18μm
Blind/Buried Vias
Not supported
Currently we don't support Blind/Buried Vias, only make through holes.
Through hole vs Buried Via diagram
Min. Via hole size/diameter
0.15mm / 0.25mm
1-layer (NPTH only): 0.3 mm hole size / 0.5 mm via diameter
2-layer: 0.15mm hole size / 0.25mm via diameter
Multilayer: 0.15 mm hole size / 0.25 mm via diameter

① Via diameter should be 0.1mm(0.15mm preferred) larger than Via hole size.
② Preferred Min. Via hole size: 0.2mm
Via diameter diagram
Min. Non-plated holes
0.50mm
Please draw NPTHs in the mechanical layer or keep out layer.
Non-plated holes diagram
Min. Plated Slots
0.5mm
The minimum plated slot width is 0.5mm, which is drawn with a pad.
Plated slots diagram
Min. Non-Plated Slots
1.0mm
The minimum Non-Plated Slot Width is 1.0mm, please draw the slot outline in the mechanical layer(GM1 or GKO)
Non-plated slots diagram
Via Hole-to-Hole Spacing
0.2mm
Via spacing diagram
Pad Hole-to-Hole Spacing
0.45mm
Pad spacing diagram
Min. Castellated Holes
0.60mm
Castellated holes are metalized half-holes on PCB edges, commonly used on daughter boards to be soldered onto carrier PCBs.
① Hole diameter (Ø): ≥ 0.6 mm
② Hole to board edge (L): ≥ 1 mm
③ Hole to hole (D): ≥ 0.6 mm
④ Min. PCB size: 10 × 10 mm
⑤ Min. PCB thickness: 0.6 mm
Castellated holes diagram
Plated Edges
10 x 10mm
Plated edges are copper-plated and ENIG treated, HASL is not supported.
① Min. PCB size: 10 × 10 mm
② Min. PCB thickness: 0.6 mm
③ At least 3 breaks (more for larger PCBs) in the edge plating are required for support tab connections
Plated edges diagram
Rectangular Holes / Slots
Not supported
Rectangular holes and slots without rounded corners are not supported.
Rectangular holes diagram