The most obvious thing to me is that they routed the image out and
exposed copper planes on the edges. We have a 1 mm designed keep-out
area so even with the profile tolerance we always maintain a minimum
copper clearance of .63 mm from the edge of the PB.
Dewey 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ian Hanna
Sent: Tuesday, July 10, 2007 6:59 AM
To: [log in to unmask]
Subject: Re: [TN] Injury by array

What makes this board different from the 'safe' designs and how was it
established that this is a 'design' issue?  Assuming that operator
handling is unchanged.  Which part of the board is causing the injury?
Ian






-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of McGlaughlin, Jeffrey
A
Sent: Tuesday, July 10, 2007 4:23 AM
To: [log in to unmask]
Subject: [TN] Injury by array

Oh wise and wonderful members of tech net -

We have had to incidents in the past six months where assemblers have
been cut while handling assembly arrays (2-up panels) for one of our
products. This has elevated the issue to "Panic Mode" due to the
involvement of EHS&Q (environmental health, safety and quality). As the
designer of the array I have been given ownership of the issue and am
task with resolving it.  After 20+years of handling boards and arrays I
have never been cut, so I am unsure as to what if any corrective action
can be taken to prevent future injuries.

The specifics on the arrays -
10.5" [267mm] x 12.0" [305mm] x 0.062" [1.6mm] thick
2 - up for 4.7"[119.3mm] x 9.2" [233.6mm] PCB
Minimum rail 0.38"[9.5mm]
Tab Route and Retain (mouse bite)
Injuries occurred during loading of the solder printer and during slide
line operations for post reflow assembly. 

Any suggestions on what to tell our production group?

Jeffrey McGlaughlin, CID 
Engineering Designer 
Battelle 
505 King Avenue 
Columbus Ohio 43201-2693 
(614)424-7582 Phone 
(614)458-7582 Fax 
PS Don't you just love all those  management buzzwords (underlined.)
>;-D 

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