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June 2002

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Subject:
Re: cracks in solder joints
From:
"Ingemar Hernefjord (EMW)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 24 Jun 2002 09:11:29 +0200
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Hi Bev,
saw once that a crack must never be longer that the size of the solder grain size. As soon as the crack exceeds that size, it's a presumptive danger. Sounds a bit of an exaggeration to me, but  have seen that expression more than once.
Ingemar Hernefjord
Ericsson Microwave Systems



-----Original Message-----
From: Bev Christian [mailto:[log in to unmask]]
Sent: den 20 juni 2002 21:33
To: [log in to unmask]
Subject: [TN] cracks in solder joints


Hopefully this will start off a nice discussion.  I have kept it general for
that purpose.

Shades of voids in BGAs...   How big of a crack in thermally cycled solder
joints is too big of a crack?

Bev Christian
Research in Motion

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