I would agree.
If the hole is plated then it would be considered 'supported'
I don't think that clinching will add anything to your solder joint
strength. Really just holds thing in place whilst soldering. (esp wave).

regards,
Phil.


Phil Dutton C.I.D.
Senior CAD Technician
IPC Certified Interconnect Designer

Tenix Defence Systems Pty Ltd
Systems Division - Adelaide
Second Avenue, Technology Park,
Mawson Lakes.  SOUTH AUSTRALIA  5095

-----Original Message-----
From: Stephen R. Gregory [mailto:[log in to unmask]]
Sent: Wednesday, 28 March 2001 5:56
To: [log in to unmask]
Subject: [TN] Flex circuit questions...


Hi ya'll!

Couple of quick questions about flex circuits:

1. What kind of hole on a flex circuit with a anular pad on the top and
bottom of PTH location, and a plated barrel (even if it is only 10-mils
tall), considered? Supported, or unsupported?

2. Does clinching axial through hole components on a flex circuit with the
above described flex (there's also a stiffener that is bonded to the flex
where the components are located) buy you anything as far as solder joint
strength? (I'm not talking a full clinch, just a partial clinch)

Thanks!

-Steve Gregory-

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