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BGA Collapsing & Non-Collapsing Ball |
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mahmoodv99 
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Joined: 16 Jan 2016 Status: Offline Points: 93 |
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 Topic: BGA Collapsing & Non-Collapsing BallPosted: 08 May 2017 at 9:11pm |
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How I can find a BGA has collapsing or non-collapsing balls? Not mentioned in datasheet. |
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cioma
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Posted: 09 May 2017 at 1:03am |
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I suppose that can be judged by ball material.
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mahmoodv99
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Posted: 09 May 2017 at 2:22am |
how ?
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magnus.lictor
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Joined: 27 Aug 2012 Location: Amsterdam, NL Status: Offline Points: 62 |
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Posted: 09 May 2017 at 2:39am |
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Tom Hausherr wrote a very nice blog on this subject a while ago.
Have a look at https://blogs.mentor.com/tom-hausherr/blog/tag/bga/ It is in the lower part of this document. |
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cioma
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Posted: 10 May 2017 at 1:08am |
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By likelihood of the material to melt during reflow.
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Tom H
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Posted: 10 May 2017 at 6:10am |
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Normally, a non-collapsing Ball starts at 0.50 mm pin pitch however, there could be some 0.65 mm pitch. The pad size grows larger to accommodate the hole-in-pad annular ring. |
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cioma wrote: