This question just appeared on The SMART Group's forum as well, so I can
reiterate my answer there:
I don't think these are covered by IPC standards.
Further research gets me this quote from Werner Engelmaier:
"There is no shear strength standard for solder joints, nor can there be.
If solder joints are properly wetted, they have more than ample strength
for
normal, even severe, handling and operating conditions. If they are not
properly wetted, the strength will be inadequate; because you really do not
have a solder joint. Solder joint reliability for properly wetted SJs is
not
a function of SJ strength.
The solder joint strength in pull/shear will vary with lead geometry,
solder
volume, lead metal/metallization, the way the test is done. For
50-mil-pitch
gullwings pull strength between 2000 and 5000g are typically measured."
--
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Peter Swanson Oxfordshire, England
Dynamix Technology Ltd
IPC Standards, Guidelines & Videos - Electronics Manufacturing Bookshop
[log in to unmask] http://www.dynamixtechnology.com
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
-----Original Message-----
From: My Nguyen [mailto:[log in to unmask]]
Sent: 08 February 2002 1:00
To: [log in to unmask]
Subject: [TN] Component Join Shear Test
Hello Technetters,
Besides the Wire Bond Shear Test, does Jedec, or IPC,
or other any committees have any other standard Shear
Test for Component Joins.
Your advise, again, are always appreciated.
Stacy
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