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blind, burried, micro via???

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bijug007

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burried via

Hi,
Whats the differnce between blind burried and micro via?
Thanks
 

burried vias

Blind and buried vias .. laser drilled microvias:
**broken link removed**

Regards,
IanP
 

micro blind via

Blind via: It's from one of the surface to any of inner layer.

burried Via: It's via that is between inner layers. burried via is not accessable from top or bottom laye.

Microvia: These are the vias with narrow drill hole. usually these vias are directly present in component pads.
 

via, microvia, blind and buried vias

Micro vias can be Via-In-Pad as suggested, however not required. Microvias also require a specific hole to thickness ratio - which is why you will not have a micro-via go more than from the TOP layer to layer 1 or 2.
 

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