Drills & Throughplating

A unique differentiation in your data between plated-through holes (PTH) and non plated- through holes (npth) is of fundamental importance! This means that you must output a separate drilling program for pth- and npth drill holes, for example, for Excellon or Sieb&Meyer data. For multilayers, this also applies for blind and buried vias. ODB++ data contain the necessary information automatically! 

Attention: The hole diameter indicated by the customer represent the final diameter!

Producible hole diameters

  Smallest Ø Largest Ø Max. aspect ratio
Drill hole npth 200µm 6,0mm (larger = milling) 1:10 (rfq 1:12)
Drill hole pth 75µm* 6,0mm 1:10 (rfq 1:12)
Buried via** 100µm* 0,4mm 1:10
Blind via** 100µm* 0,4mm 1:1

* Final diameter after surface finishing!
** Not possible with HAL surface!

Aspect ratio

The aspect ratio indicates the relationship between the technically producible final diameter depending on the material thickness. Multi PCB can produce aspect ratios up to a maximum of 1:10 (for blind vias 1:1).

Sample aspect ratios

Material thickness drill-Ø min final-Ø min.*
6,0mm 600µm 550µm
3,0mm 300µm 250µm
2,0mm 200µm 150µm

* Final diameter after through-plating

Tooling / assembly holes (npth)

Tooling or assembly holes (normally with diam. = 3.05mm) should be placed in the same drilling program as npth drill holes. Please label tooling holes as such in the dimension layer. 

Component holes

For technical manufacturing reasons, plated-through holes are drilled approx. 150µm larger than the final diameter you have specified (the final diameter is achieved by the plating). For component holes, you may need to make the annular rings larger.

Please note: Circuit boards with drill holes sized 0.6mm or smaller that are intended as component holes must be manufactured with a chemical surface, otherwise these holes will be filled with tin during the HAL process!

It is normally advisable to select a hole diameter in the upper tolerance region of the corresponding part.

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Pricing Examples

Printed Circuit Boards always include:

- E-Test
- Solder-stop 2x
- Marking print 1x
- Gerber-Import
- Scoring (series)
- Design-Rule-Check

- Tooling costs
- Photoplot
- Conductors 150μm
- Drill holes 0,3mm
- Unlimited drilling
- HAL, FR4 1,6, 35μm Cu

Prototypes
2 layers - 6 WD
41,- €
1 Printed circuit board 100x100mm
4 layers - 6 WD
118,- €
1 Printed circuit board 160x100mm
6 layers - 8 WD
148,- €
1 Printed circuit board 160x100mm
Series
e.g. 100 pcs. Eurocard 100x160mm
2 layers - each
4,76 €
 
4 layers - each
7,41 €
 
6 layers - each
11,20 €
 
8 layers - each
16,05 €
 
SMD Stencils
max. 200x300mm - 3WD
47,50 €
1 Stencil, including 1000 pads
max. 600x600mm - 3WD
90,44 €
1 Stencil, including 2500 pads

Directly from your data

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