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B&B is short for Blind and Buried via holes

This paper we are going to discuss B&B.
B&B is short for Blind and Buried via holes.
If you have follow 4MCPCB update, you may have memory about Blind and Buried via holes.
And in this paper we will introduce some different content regarding B&B.

B&B is a special PCB layer connected method

Blind and buried vias(or named B&B) are used to connect between layers of a PCB where space is at a premium.
Usualy the short named B&B is not use so widely.
One reason is that B&B is a special PCB layer connected method, most flexible PCB board don’t need B&B technology.
Then B&B in other industry have different meaning.

Blind via for B&B

A blind via connects an outer layer to one or more inner layers but does not go through the entire board.
2 articles about Blind via holes discussion
Two common sense of blind and buried vias
You should know blind Vias before you order HDI PCB

Buried via for B&B

A buried via connects two or more inner layers but does not go through to an outer layer.
2 articles about Buried via holes discussion
Blind And Buried Vias
You should know blind Vias before you order HDI PCB
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