Standard PTH examples

The figure below details the different layers of a plated through hole (PTH). horizontal section (Fig. VH1) and vertical (Fig. VH2).

A: FR4 + soldermask

B: FR4

C: plating

D: copper core

E: Ring

Standard sizes for traditional components:

x - diam. finished hole: 0.8 mm

- size of the ring: 1.2 mm

y - diam. drilling before metallization

Standard dimensions for via:

x - diam. finished hole: 0.2 mm

- size of the ring: 0.4 mm

Standard sizes for micro-via:

x - diam. finished hole: 0.1 mm

- size of the ring: 0.3 mm

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