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Home > Engineering/Technical > PCB Design Specifications and Tolerances
Rigid Printed Circuit Board Design Specifications And Tolerances
--Caring Circuit capability
|
Service |
Caring Circuit
Capability |
|
Products |
Rigid PCB, flex PCB, rigid-flex PCB, aluminium PCB,frame and frameless stencils, assembly fixtures .etc |
|
Other Service |
Assembly ( components customer provided); free stack up, free panel layout, free layout check |
| Rigid PCB Material | Caring Circuit Capability |
|
Max panel size |
1200×480mm |
|
Material |
FR4, Rogers 4003C,4350B, polymide, PET, Aluminum |
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Layer |
1L - 18L |
|
Range of TG |
130-175℃ |
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Copper thickness |
Out layer Cu thickness 1-6 OZ Inner layer Cu thickness 0.5-5 OZ |
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Surface treatment |
HASL leaded, HASL Free Lead, Plating Gold , Immersion Gold Immersion Silver, Immersion Tin, OSP/ENTEK, Carbon Ink, Peelable Mask |
| Board thickness | Caring Circuit Capability |
|
Final pcb thickness |
0.2~6.5mm |
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Thickness tolerance |
Thickness＜0.8mm, Tolerance:+/-0.08mm |
| 0.8mm≤Thickness≤6.5mm,Tolerance+/-10% | |
| Core thickness | ≥ 0.11mm |
|
2 layer |
≥ 0.2mm |
| 4 layer | ≥ 0.4mm |
| 6 layer | ≥ 0.8mm |
| 8 layer | ≥ 1.0mm |
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10 layer |
≥ 1.1mm |
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12 layer |
≥ 1.3mm |
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14 layer |
≥ 1.5mm |
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16 layer |
≥ 1.6mm |
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18 layer |
≥ 1.8mm |
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Twisting and bending |
≤0.75% Min0.5% |
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Impedance tolerance |
+/-10%，Min+/-5% |
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Holes |
Caring
Circuit Capability |
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Mechanical drilling |
0.20~6.5mm |
| Min laser drilling |
0.1mm |
|
board thickness/hole size |
≤ 10:1 |
| Final hole size tolerance | PTH: φ0.20~1.60mm+/-0.075mm φ1.60~6.30mm: +/-0.10mm |
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NPTH: φ0.20~6.5mm+/-0.05mm |
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| Drilling strip hole | Longth/ width 2: 1 |
| Min strip hole width 0.65mm | |
| Longth &width tolerance +/-0.05mm | |
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Cu thickness of PTH |
IPC class 2 : average≥20um Min.≥18um Max.≤35um; IPC class 3 |
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Special holes |
Countersink and counterbore |
|
Pattern |
Caring Circuit Capability |
|
Min. ring width ( outlayer) |
0.076mm |
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Min. ring width ( inner layer ) |
0.15mm |
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Min. trace width/gap |
0.076mm/0.076mm |
| Solder mask | Caring Circuit Capability |
| Solder mask Color | PSI green, matt green, yellow, blue, red, black, matt black, white |
|
Solder mask thickness |
On surface line≥ 10µm |
| On surface line corner≥ 6µm | |
| On surface board 10-25µm | |
| Min. green solder mask bridge width: 0.075mm/ HOZ, 0.12mm/ 1OZ ,0.13mm/ 2OZ, other color: 0.15mm | |
| Min.Soldermask opening | Green : 0.05mm other color 0.075mm |
| Soldermask plugged vias Diameter | Min: 0.2mm Max.: 0.65mm |
| Peelable mask | Caring Circuit Capability |
| Peelable mask Thickness | ≥ 300um 0.3-1.0mm |
| Pealable soldermask tolerance | +/ -0.15mm |
| Peelable Mask Opening | 0.3mm |
| Peelable Mask to pad min. | 0.4mm |
| Peelable Mask Plugged holes | 6.0mm |
| Peelable Mask Type | SD2955（PETER） |
| Legend | Caring Circuit Capability |
| Silkscreen Color (legend) | White, yellow, black |
| Min height of silkscreen | 0.70mm (28mil) |
| Min width of silkscreen | 0.15mm (6 mil) |
| Finishing | Caring Circuit Capability |
| HASL with lead | Tin 63% Lead37% |
| HASL free lead | Surface thickness>=0075µm |
| OSP | Thickness in the hole>=5µm , Size max 500*600mm,min 200*30 mm,0.2-0.4 Micro inch |
| Electric/ plating Gold | Ni thickness: 3-5µm (120u"-160u") |
| Gold thickness: 0.025-0.075µm （1u"-8u"） | |
| Immersion Gold | Ni thickness: 3-5µm (120u"-160u") |
| Gold thickness: 0.025-0.15µm （1u"-6u"） | |
| Immersion Tin | Tin thickness: 0.8-1.2µm（32u"-48u"） |
| Immersion silver | Ag thickness: 0.15µm-0.75µm (6u"-30u") |
| Hard gold plating for connector( gold finger) | Ni thickness: 3-5µm（120u"-160u"） |
| Gold thickness: 0.025-1.51µm（1u"-60u"） | |
| Profile | Caring Circuit Capability |
|
CNC |
Tolerance +/-0.1mm |
| Line to cnc ≥ 0.20mm | |
| Hole to cnc ≥ 0.30mm | |
| Gold finger to cnc ≥ 0.20mm | |
| Punching | Hole size diameter +/-0.10mm |
| Punching diameter +/-0.15mm | |
|
V-cut
|
V-cut degree 20°, 30°, 45°, 60° |
| Tolerance of horizontal deviation ≤0.05mm | |
| V-cut centre line to copper≥ 0.5mm | |
| Bth 1.0mm, deepness 0.35mm x2, residual 03+/-0.1mm | |
| Bth 1.2mm, deepness 0.40mm x2, residual 0.4+/-0.1mm | |
| Bth 1.6mm, deepness 0.60mm x2, residual 0.5+/-0.1mm | |
| Bth 3.0mm, deepness 1.20mm x2, residual 0.8+/-0.1mm | |
| Testing | Caring Circuit Capability |
|
Testing ways |
Probleflying testing for sample and small batch, testing fixture for volume |
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