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0.4mm pitch bga and board thickness have become 280 mills

Nayyierwajih

Hi all

We have 0.4mm pitch bga and board thickness have become 280 mills ,we can not drill a 5 mills via with 8 mills pad upto this thickness,what is the solution,any suggestions?

Regards

Nayyier 

Parents
  • Nayyierwajih

    Hi STEVE

    Having stack vias (BLIND/BURRIED) is a good approach but that is too costly:))

    Will you please explain the core vias?

    many thanks for your reply

    Regards

    Nayyier 

Reply
  • Nayyierwajih

    Hi STEVE

    Having stack vias (BLIND/BURRIED) is a good approach but that is too costly:))

    Will you please explain the core vias?

    many thanks for your reply

    Regards

    Nayyier 

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