Manufacturing Tolerances

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PCB Assembly

PCB Manufacturing Tolerances

AlteraFlex provides you below with the required in-house tolerance guidelines to ensure quality manufacturing of your printed circuit boards.  Adhering to these tolerances will allow for proper manufacturing of your PCBs. Within these parameters, there is enough variation to allow us to manufacture the board and then also for it to work properly in your application. If you have any questions or want to discuss unique requirements, please call contact your customer service.

PCB Assembly
PCB Assembly

PCB Tolerances

Analysis of outer layer（check width，annular ring，min annular ring，NP to copper，KO to copper, etc） 

Outer copper thickness 1OZ 2OZ 3OZ 4OZ
Compensation value 0.01mm 0.02mm 0.03mm 0.04mm
Normal trace/spacing 0.12MM 0.15MM 0.2MM 0.25MM
Normal Width between pads 0.12MM 0.15MM 0.2MM 0.25MM
Normal Width between pad and trace 0.12MM 0.15MM 0.2MM 0.25MM
Normal Width between pad or tarce and copper area 0.2MM 0.2MM 0.2MM 0.2MM
Normal VIA pad single side width 0.15mm 0.16mm 0.17mm 0.18mm
Normal PTH pad single side width 0.2mm 0.21mm 0.22mm 0.23mm
Normal Width between NP holes and copper 0.2mm 0.2mm 0.2mm 0.2mm
Normal Width between profile and copper 0.3mm 0.3mm 0.3mm 0.3mm
Normal width between via and copper 0.2mm 0.2mm 0.2mm 0.2mm
Max trace/spacing 0.1MM 0.13MM 0.18MM 0.23MM
Max width between pads 0.1MM 0.13MM 0.18MM 0.23MM
Max width between pad and trace 0.1MM 0.13MM 0.18MM 0.23MM
Max width between pad or trace and copper area 0.18MM 0.18MM 0.18MM 0.18MM
Min width between NP holes and copper 0.15mm 0.15mm 0.15mm 0.15mm
Min Width between profile and copper 0.25mm 0.25mm 0.25mm 0.25mm
Min width between V-Cutline and copper 0.35mm 0.35mm 0.35mm 0.35mm
Min width between via and copper 0.18mm 0.18mm 0.18mm 0.18mm

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