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 IPC7351 Lead Free Land Pattern Spec 

Last post Mon, Sep 17 2007 1:22 PM by archive. 1 replies.
Started by archive 17 Sep 2007 01:22 PM. Topic has 1 replies and 759 views
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  • Mon, Sep 17 2007 1:22 PM

    • archive
    • Top 75 Contributor
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    IPC7351 Lead Free Land Pattern Spec Reply

    Ha any used IPC7351 Spec for lead free footprints yet? In determining BGA footprint they talk about a collapsing and non collapsing ball. If its collapsing the pad size is reduced if it is non collapsing then the pad size is increased. I have never seen this information on the part data sheets? How does one know? I got this data point

    http://www.pcblibraries.com/forum/forum_posts.asp?TID=1599

     off a search but have never seen a BGA specked with a nominal ball of .15 .17 MM

    How is everyone else dealing with this?

    BOttom line to me is do I really need another footprint for a leaded  vs. a non lead BGA

    Thanks
    Ahead of time for all answers.


    Originally posted in cdnusers.org by CTMusetti
    • Post Points: 0
  • Tue, Sep 18 2007 8:12 AM

    • archive
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    RE: IPC7351 Lead Free Land Pattern Spec Reply

    There is also this post.

    http://www.pcblibraries.com/forum/forum_posts.asp?TID=1121

    Has some information to clarify things in the PDF's in the post.

    Mike


    Originally posted in cdnusers.org by mledwinka
    • Post Points: 0
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Started by archive at 17 Sep 2007 01:22 PM. Topic has 1 replies.