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Changing normal vias to b lind or burred vias

autodeskguest

I'm developing my first 4-layer board in v4.16.  My plan is to prototype it

with Osh Park before doing a pilot run with the final vendor.  For

aesthetic reasons (this is for a piece of functional sculpture), I'd like

the final version to use blind and, possibly, buried vias (so one side of

the PCB will be "unblemished"), but Osh only supports normal ones that go

all the way through.  It's not clear to me from the Eagle docs

 

1.  How to specify which type of via is created when routing on an internal

layer, or

 

2.  How to change a normal via to a blind or buried one later. 

 

Any tips on either or both of these issues appreciated.  I'm wondering how

big a chore it's going to be to go back and change all the normal vias for

the production version.

 

Thanks.

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

 

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  • Karl Lautman wrote:

    I'm developing my first 4-layer board in v4.16.  My plan is to prototype it

    with Osh Park before doing a pilot run with the final vendor.  For

    aesthetic reasons (this is for a piece of functional sculpture), I'd like

    the final version to use blind and, possibly, buried vias (so one side of

    the PCB will be "unblemished"), but Osh only supports normal ones that go

    all the way through.  It's not clear to me from the Eagle docs

     

    1.  How to specify which type of via is created when routing on an internal

    layer, or

     

    2.  How to change a normal via to a blind or buried one later. 

     

    Any tips on either or both of these issues appreciated.  I'm wondering how

    big a chore it's going to be to go back and change all the normal vias for

    the production version.

     

    first you need to configure the stackup in tools/DRC/Layers

     

    than you can use "change layer" or the info dialog to modify the vias

    after the fact, and the middle mouse contect menu during routing.

    --

     

    Lorenz

     

  • in reply to autodeskguest

    Lorenz:  If I start routing a trace on the top layer and then center-click

    to move it to the 2nd layer, will that via be a blind via or regular via?

    If blind, how do I make it regular, and vice-versa?  As far as I can tell,

    changing layers only works on traces; corresponding vias get changed

    automatically, but you can't change them directly.

     

    Morten:  I want to end up with one side containing only solder mask:  no

    holes (filled or otherwise) or even traces beneath the mask.  The other

    side of the board will contain all the circuitry in surface mount packages,

    connected via traces on this side and the two inner layers (both of which

    will be signal layers). 

     

    1.  What do 6 layers get me that I can't get with 4?

     

    2.  These would still be visible where they penetrated the mask.

     

    3.  Won't this cause the mask to cover everything, including pads I need to

    solder to?

     

    4.  Same problem as 2.

     

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

  • in reply to autodeskguest

    Am 23.09.2016 um 19:21 schrieb Karl Lautman:

    If blind, how do I make it regular, and vice-versa?  As far as I can tell,

     

    CHANGE VIA, if I'm not misunderstanding you.

     

    Rene

     

     

  • in reply to autodeskguest

    Rene:

     

    Got it.  Had my Setup wrong on Layers.  Thanks.

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

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