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EAGLE User Support (English) Overlap error under IC
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Related

Overlap error under IC

autodeskguest
autodeskguest over 15 years ago

I have manually placed GND vias under the IC, but the DRC can't accept it,

showing Overlap error, like seen in the snapshot. Why?

 

Regards,

 

 

 

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  • autodeskguest
    autodeskguest over 15 years ago

    "Thiago Henrique Rodrigues" <thiago_hr@yahoo.com.br> wrote in message

    news:hifi5f$pa5$1@cheetah.cadsoft.de...

    Actually, the big square under the IC has no name, nor it is connected to

    GND... I manually connected it using the VIAS. So I can leave it like

    this, that will work, right?

     

    No that will not work, cause the SMD pad will get a signal name wether you

    set it or not.

    You should edit your device so that the smd will get a pin that you can

    connect to GND. It could be a separate symbol with the pin direction set to

    'power' and named 'GND' (and set add feature of this symbol to suiteable

    value - rtfm). This will hide the gnd connection, although personally I

    don't like hidden stuff.

     

     

     

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  • autodeskguest
    autodeskguest over 15 years ago in reply to autodeskguest

     

    "Morten Leikvoll" <mleikvol@yahoo.nospam> escreveu na mensagem

    news:hiho1u$3mk$1@cheetah.cadsoft.de...

    "Thiago Henrique Rodrigues" <thiago_hr@yahoo.com.br> wrote in message

    news:hifi5f$pa5$1@cheetah.cadsoft.de...

    Actually, the big square under the IC has no name, nor it is connected to

    GND... I manually connected it using the VIAS. So I can leave it like

    this, that will work, right?

     

    No that will not work, cause the SMD pad will get a signal name wether you

    set it or not.

    You should edit your device so that the smd will get a pin that you can

    connect to GND. It could be a separate symbol with the pin direction set

    to 'power' and named 'GND' (and set add feature of this symbol to

    suiteable value - rtfm). This will hide the gnd connection, although

    personally I don't like hidden stuff.

     

     

     

    I still don't understand that error... there is this ESD diode, with 3

    terminals (two of them connected to GND in schematic). I want to put vias on

    these pads directly to GND, but it keeps generating overlap error. But if I

    create a via name GND on the side of the diode, it connects the pad to the

    via... what is wrong?

     

     

     

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  • autodeskguest
    autodeskguest over 15 years ago in reply to autodeskguest

     

    "Morten Leikvoll" <mleikvol@yahoo.nospam> escreveu na mensagem

    news:hiho1u$3mk$1@cheetah.cadsoft.de...

    "Thiago Henrique Rodrigues" <thiago_hr@yahoo.com.br> wrote in message

    news:hifi5f$pa5$1@cheetah.cadsoft.de...

    Actually, the big square under the IC has no name, nor it is connected to

    GND... I manually connected it using the VIAS. So I can leave it like

    this, that will work, right?

     

    No that will not work, cause the SMD pad will get a signal name wether you

    set it or not.

    You should edit your device so that the smd will get a pin that you can

    connect to GND. It could be a separate symbol with the pin direction set

    to 'power' and named 'GND' (and set add feature of this symbol to

    suiteable value - rtfm). This will hide the gnd connection, although

    personally I don't like hidden stuff.

     

     

     

    I still don't understand that error... there is this ESD diode, with 3

    terminals (two of them connected to GND in schematic). I want to put vias on

    these pads directly to GND, but it keeps generating overlap error. But if I

    create a via name GND on the side of the diode, it connects the pad to the

    via... what is wrong?

     

     

     

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Children
  • autodeskguest
    autodeskguest over 15 years ago in reply to autodeskguest

     

    "Thiago Henrique Rodrigues" <thiago_hr@yahoo.com.br> wrote in message

    news:hjn6vb$cqv$1@cheetah.cadsoft.de...

    I still don't understand that error... there is this ESD diode, with 3

    terminals (two of them connected to GND in schematic). I want to put vias

    on these pads directly to GND, but it keeps generating overlap error. But

    if I create a via name GND on the side of the diode, it connects the pad

    to the via... what is wrong?

     

    If you put vias ON smd pads, then you will always get drc error. I have been

    into the same problem when using a pcb battery holder where I wanted the smd

    to be the tallest point on the board, where I wanted the via inside the pad.

    I guess there is no other solution than to just approve that error.

     

     

     

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