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Application Note
BD71837MWV Platform Design Guide
© 2018 ROHM Co., Ltd.
No. 61AN002E Rev.001
May.2018
4.5. Via Guidelines
This section explains proper via-drill, pad, and anti-pad size.
Note:
Improper drill, pad, and anti-pad size may cause some troubles on the PCB cost, reliability, manufacturability, and electrical
characteristics.
Type-3 PCB technology employs plated through-hole (PTH) vias for breakout routing. The dimension of PTH vias may vary as
necessary. Table 2.1 shows the recommended via dimension used for the breakout areas of BD71837MWV. Figure 4.4 shows the
image of PTH vias.
Table 4.1 Dimension example for PTH
Via type
Hole size
Pad size
Anti-Pad size
Plated through-hole (PTH)
12 mils
24 mils
32 mils
Hole size
Pad size
Anti-Pad size
Figure 4.4 The image of PTH vias
