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PCB기술

PCB기술

PCB기술

PCB기술

Different between Blind and Buried PCB.HDI Board.
2019-08-02
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Author:ipcb      Share

Blind Via is a copper plated hole that connects only one outer layer to one or more inner layers. A blind via never goes all the way through a circuit board.  In terms of design, blind vias are defined in a separate drill file.

Blind.png

Additional Benefit of Blind Vias:
Ability to widen BGA breakout channel (layer count reduction)




Buried Via is a copper plated hole that connects two or more inner layers, with no contact with the outer layer. It is impossible to detect a buried via as it is "buried" underneath the outer layer surfaces of a PCB. Buried vias also require a separate drill file.

buried.png

Additional Benefits of Buried Vias
-No impact to any trace or surface mount component on the top or bottom layers of the board.
-Trace or an SMD pad placement on the outer layers directly over the buried via (added space on outer layers)