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7.14 Vian (where n = 1 to 5)
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For better yield and reliability try to avoid single vias on any layer (put multiple). Vian stack2 over contact is permitted
.. csv-table:: VIAN
:file: tables_clear/7.14_Vian.csv
:widths: 100, 200 , 300
.. note::
1. The orientation of a, b, c, d is not important. But their order is important:
a is adjacent to both b and d.
b is adjacent to both a and c.
c is opposite of a.
2. Vian is stacked if any portion of it intersects Via [n+1] or Via [n-1], or contact if n=1.
.. image:: images/Vian.png
:width: 800
:align: center
:alt: vian