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Asunny Circuits

PCB Capabilities

Learn about our PCB Manufacturing & Assembly Capabilities

PCB Specifications
FeaturesCapability DescriptionPatterns
Layer count1~24 layersMass production up to 22 layers
MaterialFR-4, HF FR-4, FR-4 HTG, Aluminium-Core, Ceramic, PTFESpecific materials available upon request
Maximum Dimensions610mm x 450mm; dependant upon laser drilling machine
Minimum Dimensions 3mm*3mm
Dimension Tolerance±0.1mm
HDI Capability HDI: 1+1+N+1+1, 2+N+2. 3+N+3 (≥4 orders require evaluation)
Impedance Tolerance≥50Ω, ±8%; < 50Ω, ±4ohm
Thickness0.2-0.4mm (evaluation required for less than 0.2mm or greater than 4mm)
Thickness Tolerance±0.05~±0.1mmDepends on the layer count
Base copper thicknessInner layer:8µm~150µmUp to 175µm for prototype
Outer layer:8µm~140µm
SoldermaskGreen, Black, Yellow, Red, White, Blue, RedAny color upon request
Surface Finish HASL (leaded / lead-free), ENIG, OSP, Gold finger,Electrolytic gold
FeaturesCapability Description Patterns
Drill Diameter0.15~6.5mm
Laser drilling: minimum 0.1mm, advanced 0.075mm



Hole size Tolerance (Plated)±0.04mm
Hole size Tolerance (Non-Plated)±0.025mm
Via typeBlind via, Buried via, Through-hole
Min. Via hole size/diameter0.15mm/0.25mm
Min. Plated Slots0.55mm
Min. Non-Plated Slots1.0mm
FeaturesCapabilityDescriptionPatterns
Min. track width and spacing(Inner layer)1/2oz: 0.075mm/0.075mm

1/1oz: 0.075/0.1

2/2oz: 0.10/01.3

Min. track width and spacing(Outer layer)0.07mm/0.07mm
Track width tolerance±20%e.g. For a 0.1 mm track, the finished track width ranges from 0.08 and 0.12 mm.
Min. annular ring0.18mmDepends on layer count
Min. BGA pad0.15mm
Min. hatched grid width and spacing0.15mm/0.2mmFor outer layers
Min. via hole to track0.18mmDepends on layer count
FeaturesCapability DescriptionPattern
Soldermask Opening1. For 2oz copper base, the soldermask opening should be 0.075mm larger than the original trace width (non-plating edge)

2. For solder bridge prevention, IC pads and SMT component pads can have a soldermask opening up to 0.04mm larger per edge

3. Soldermask opening on pads must ensure a minimum solder mask overlap of 0.05mm on the pad

4. Soldermask opening around plated edges should be enlarged by 0.02mm (tolerance +/-0.03mm, and for BGA enlarged by 0.04mm)

5. vias design must have a clearance of 0.1mm or more from the pads, or be completely within the solder pad area, otherwise it will result in voids

Solder mask opening
Soldermask BridgeMin pad spacing 0.1mm for green; min pad spacing 0.15mm for other coloursthe best we can do for green is 0.07 and 0.1 for other colours; please confirm with us if neededSolder mask bridge
Soldermask ColourGreen, Black, White, Yellow, Blue ,Red or any colour requested
Green soldermask is free; other colours might be charged accordingly
Via-in-Pad Process 1.Epoxy Filled & Capped

2.Copper paste Filled&Capped
Vias are plugged with either epoxy resin or copper paste, followed by surface plating to create an opaque and smooth finish.via in pad
Soldermask Thickness1.Trace Surface: ≥6 µm

2.Trace Corner: ≥5 µm

3.Base Material Surface: 20–40 µm (for total copper thickness less than 2 oz)

4. When the copper thickness exceeds 2 oz, double printing is required, thickness on Base Material Surface should be 25–60 µm
solder mask thickness
FeaturesCapabilityDescriptionPattern
Minimum Line Width0.12mmsilkscreen width
Minimum text height0.6mmsilkscreen height
Minimum pad/via to text0.25mmthe best we can do is 0.2mm, please let us know if neededsilkscreen to pad
Silkscreen colour White, Black, Yellow, Blue, Greenany colour as requested
FeaturesCapability Description Pattern
RoutingMin trace to edge: 0.2mm
1.Outline tolerance: ±0.10mm

2.Maximum board dimensions: 550×440mm

3. Slot, concave slot, and opening slot width: ≥0.8mm

4.Minimum hole-to-edge distance:
-For board thickness ≥0.4mm: ≥0.2mm
-For board thickness <0.4mm: ≥0.25mm

PunchingMin trace to edge: 0.25mm1.Maximum panel dimensions:

-Outline: 350×350mm
-Unit size: 160mm×200mm (non-battery board)
-Battery board unit maximum: 125mm×145mm (using A/B punch)

2. Outline tolerance: ±0.1mm, non-halogen board limit ±0.075mm

3.Via diameter tolerance: ±0.05mm

4.Min via to edge distance: 0.25mm

5.Min square hole dimensions:

-For thickness ≤0.6mm: 0.8×0.8mm
-For thickness 0.6-1.3mm: 1.2×1.2mm
-For thickness >1.3mm: 1.5×1.5mm
V-cutMin trace to edge: 0.3mm
1. Angle: 20 degrees

2.Maximum dimensions:

-Automatic: 620×620mm
-Manual: 300×300mm

3.Minimum dimensions:

-Automatic: 200×200mm
-Manual: 80×40mm

4. V-CUT spacing (Manual): ≥9mm

5. V-CUT depth: normally based on the board thickness, could be adjusted as required

6. V-CUT trace to board edge:

-Manual: Minimum required 3mm
FeatureCapability
Layer CountFPC: 2-8 layers, RFPC: 2-10 layers
Finished Board Size (Max)500mm*1800mm
Major CCL BrandDoosan, Thinflex, Shengyi, Taiyo, DongYi
Finished Board Thickness Tolerance±10%
Minimum mechanical drill 0.15mm
Minimum laser drill 0.10mm standard, 0.075mm advanced
Base Copper Thickness of Outer Layer1/3 OZ-1.5 OZ (0.012mm - 0.05mm)
Base Copper Thickness of Inner Layer1/3 OZ-1.5 OZ (0.012mm - 0.05mm)
Board Thickness(withour stiffener)0.07mm-2.0mm
Aspect Ratio of Plated Hole (Max)8:1
Hole Diameter Tolerance (PTH)±0.05mm
Hole Diameter Tolerance (NPTH)±0.05mm
Copper Thickness of PTH Wall10μm min or meet customer requirement
Design Line Width/Space of Inner Layer (Min)0.05/0.05mm
Design Line Width/Space of Outer Layer (Min)0.05/0.05mm
Solder Mask Bridge Width (Min)0.08mm
Solder Mask Alignment Tolerance±2mil (±0.05mm)
Coverlay Bridge Width (Min)8mil (0.2mm)
Coverlay Alignment Tolerance±6mil (±0.15mm)
Dimension Tolerance (Hole to Edge)±4mil (±0.1mm)
Test CapacityPAD Size min (0.1mm), PAD Pitch min (0.4mm)
Profile methodLaser cutting, Punching
Stiffener TypePI, FR4, Aluminium, Stainless Steel
Surface TreatmentHASL, ENIG, ENEPIG, Electrolytic Nickel Gold, Soft gold, Hard gold, Immersion silver and OSP, Immersion tin
ProcessItemProduction Capability
PrintingMax printable size2000*250mm
Printing accuracy±25μm (6σ)
System calibration repeat accuracy±10μm (6σ)
Scraper pressure detectionPressure closed-loop control system
SPIMin detectable solder ball spacing100μm
X-Y axis accuracy0.5μm
Error rate≤0.1%
SMTMin component size range0.6*0.3mm²—174*150mm²
Max component height25mm
Max component weight100g
BGA/CSP min ball pitch & ball diameter0.30mm, 0.15mm
Placement accuracy±35μm (3σ), ±0.03° (3σ)
Board size range5050mm²—1200370mm²
Board thickness range0.3mm—6mm
AOIMin detectable component1005
Solder joint inspection3D inspection capability
Reflow SolderingTemperature accuracy±1°C
Solder protection10 zones dual-track
X-RayMagnificationAny magnification; System magnification 12000
Resolution1μm/nm
Rotation angle & tilt viewing angleAny ±45°+360° rotation

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Headquarter Address:Gangxing Road 128, Jiujiang City, Jiang Xi province, China

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