Rich,

        Saw something similar on a small SMT board that was scored with
break-off pieces.  Actually, the board went through the process in an array,
something like six up, with the break-off boarder.  Flexing the board to
remove that boarder caused damage to a surface mount resistor pot...peeled
the metalization right off the body of the component.  Board was pretty thin
though, on the order of 30 mils.

Glenn

> -----Original Message-----
> From: Rich Lasko [SMTP:[log in to unmask]]
> Sent: Wednesday, April 18, 2001 6:41 AM
> To:   [log in to unmask]
> Subject:      [TN] Shipping Damage on SMT components
>
> Good morning everyone!
>
> I am currently investigating a customer return due to suspected shipping
> damage.  Two components in particular have been damaged.  One component is
> a
> SMT bridge rectifier (DF06S) on the primary side of the assembly.  This
> side
> uses solder paste and is reflowed.  The other component is a SMT diode
> (DL4007) on the secondary side of the assembly.  This side is glued and
> wave
> soldered.  The returned assemblies have either one or the other of the
> above
> components "torn" or "partially torn" from the pcb.  Torn includes the
> component, component pad, and attached trace(s) that have been dislodged
> from the pcb.  Both components are located near the edge of the pcb.  It
> would appear that this type of damage would take quite a bit of force to
> dislodge a low profile SMT component from the pcb with the pads and traces
> attached.  The shipping boxes nor static shielding bags appear to have
> been
> "excessively" damaged.  (No apparent holes, punctures, etc...).  Each
> assembly is bagged separately in a static shielding bag and packaged in
> individual "slots" in the shipping box.  The board size is approx. 4" x
> 4".
>
> My questions are these:
>
> 1.) Has anyone else experienced this type of damage to low profile SMT
> components?  If so, what was the cause and resolution?
> 2.) Does anyone have an idea on how much force would be needed to
> dislodged
> these type components from the pcb?
>
>
>
> Please advise.
>
> Thanks in advance for your responses.
>
> Rich Lasko
> Badger Electronics

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------