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Autodesk EAGLE
EAGLE User Support (English) Problem on 0402 package
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  • Replies 15 replies
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Related

Problem on 0402 package

Former Member
Former Member over 15 years ago

Hello,

 

the company which mounts my boards complains about EAGLE 0402 package.

They say "the pads are too much large" and a lot of components are lost

during the soldering (reflow) due to the "tombstoning" effect.

 

I'm wondering if anyone ran through this problem, because I'm sure the

EAGLE library is ok.

 

Anyway, I don't know what tell them. In fact, they ask me a charge for

new components and manual soldering (it means it's my mistake).

 

Marco

 

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Top Replies

  • icefield
    icefield over 11 years ago in reply to Former Member +1
    The IPC standard for 0402 has been revised because the pads were too large. See for example http://edit.news.cmg.net/pnneditorial/imagepath/101/0000101666_70_79681.pdf (top of page 4). If Eagle used the…
Parents
  • Former Member
    Former Member over 15 years ago

    Marco Trapanese <marcotrapaneseNOSPAM@gmail.com> wrote:

    I'm wondering if anyone ran through this problem, because I'm sure the

    EAGLE library is ok.

     

    I just recall the 0402 pads were too large for the comoactness U

    required, so I did my own. Could it be that they are meant for wave

    soldering? Google for tombstoning and you will find out why this happens

    on very light components. Pad size and position IS critical.

     

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  • Former Member
    Former Member over 15 years ago in reply to Former Member

     

    "Morten Leikvoll" <mleikvol@yahoo.nospam> wrote in message

    news:1232800121302465937.313441mleikvol-yahoo.nospam@news.cadsoft.de...

    I just recall the 0402 pads were too large for the comoactness U

    required, so I did my own. Could it be that they are meant for wave

    soldering? Google for tombstoning and you will find out why this happens

    on very light components. Pad size and position IS critical.

     

    Sorry for typo. Sloppy Iphone typing... First line should be:

    "I just recall the 0402 pads were too large for the compactness I"

     

     

     

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  • Former Member
    Former Member over 15 years ago in reply to Former Member

     

    "Morten Leikvoll" <mleikvol@yahoo.nospam> wrote in message

    news:1232800121302465937.313441mleikvol-yahoo.nospam@news.cadsoft.de...

    I just recall the 0402 pads were too large for the comoactness U

    required, so I did my own. Could it be that they are meant for wave

    soldering? Google for tombstoning and you will find out why this happens

    on very light components. Pad size and position IS critical.

     

    Sorry for typo. Sloppy Iphone typing... First line should be:

    "I just recall the 0402 pads were too large for the compactness I"

     

     

     

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