Passive components embedded in multi-layer PCBs?

Discussion in 'General Electronics Chat' started by circuitwazzup, Nov 9, 2009.

  1. circuitwazzup

    Thread Starter New Member

    Nov 8, 2009
    5
    0
    Hi,

    I'm just wondering about Multi-Layer boards and what they entail. From what I can tell they are just layers of connections but the components are all on the outside of the board. But, after a quick google search I found terms like "embedded components in multi-layer boards" and "passive components in multi-layer PCB's"

    Soooo.. my question is do most multi-layer boards these days have components in them or are the components on the outside.. And how would you troubleshoot a multilayer board? Is it even possible?? I highly doubt it.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Assuming that is correct, the board becomes an automatic throw-away with a failure of an embedded component.
     
  3. rjenkins

    AAC Fanatic!

    Nov 6, 2005
    1,015
    69
    Components within boards are very rare.

    The only 'integral' ones I have ever seen are printed resistors on some consumer gear, but on the surface of the board.

    The worst in my opinin, though not within the board, are chip-on-board devices (with the silicon die directly mounted and bonded to the board & a blob of epoxy for covering)
     
  4. Paulo540

    Member

    Nov 23, 2009
    188
    0
    In my mind, multilayer boards exist to allow for more complex circuitry in a smaller footprint, plus you can have extra power and ground planes. I think the term "embedded" refers more to a class of prefab ICs and such that are programmed for a specific function from the factory.

    If you were to insert passives between the layers of the board, I would assume you would run into all sorts of leakage/crosstalk etc issues.

    Im not really an expert on the subject but I play one on TV. j/k
     
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