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May 2003

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Subject:
From:
Rich Lasko <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 30 May 2003 16:08:27 -0500
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Bev,

I don't recall seeing any statements verbatim to what you've described below
but see section 6.3.1 (Fig. 6-6) of A610 Rev. C and section 9.2.5.1 of
J-STD-001C.  These sections do talk about allowable solder depression  (up
to a maximum of 25%).  But I would also recommend finding out what type of
environment the assembly will end up in.  High vibratory and/or thermal
shock environments may need further review before stating that such solder
depression is okay.  Hope this helps.

Rich Lasko
Badger Electronics

-----Original Message-----
From: Bev Christian [mailto:[log in to unmask]]
Sent: Friday, May 30, 2003 3:49 PM
To: [log in to unmask]
Subject: [TN] PTH Hole Fill

Technetters,
Someone in our company is quite sure "there was a relaxation of solder fill
when and if the lead of the component was not sufficiently large enough
compared to the PTH to which it was soldered".  I have no recollection of
such a change in A610. But the maybe some of my brain cells are on vacation.
Can anyone comment on the statement about hole fill, please?  Thanks.

Bev Christian
Research in Motion

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