Hi Sue
Is your process a hand insertion? If yes, then you will have to prep
your components to the correct lead protrusion prior insertion to
eliminate trimming after wave. You will required prepping tool /
equipment. I have a contact information, I can provide a name offline if
you are interested.
Good luck
Luis Gallegos
Process Engineer
Sanmina-SCI
[log in to unmask]
Phone: 262 947-7700
Direct: 262 947-2765
Fax: 262 947-7728
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Suzanne Runals
Sent: Friday, August 04, 2006 2:26 PM
To: [log in to unmask]
Subject: [TN] Lead Cutting/Fractured Solder Joints
We are experiencing fractured solder joints in our manufacturing
process. We know it is caused from the lead trimming we are doing. We do
not have automated equipment that will cut and clinch the leads.
I wanted to reflow the boards a second time until we get our process
under control but not everyone agrees with that. They are afraid of
damage to the components caused by the heat of the reflow. Has anyone
else experienced this issue before and what did you temporarily do to
alleviate the problem while working on the real issue of the lead
cutting process. I have tried visual inspection but these boards are
dense boards and we missed some joints and they were returned to us
again by our Customer.
IPC 610 section 7.5.5.8 states you may reflow and it is not considered
rework. However they mention nothing about reliability if we do this.
Thanks
Sue Runals
QA Mgr.
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