Forgive me Victor, but what is a "hybrid"?  Used to mean bare semi die with wirebonds, but I've heard it used in other contexts.  For wirebonded stuff, I now refer to it as "chip&wire" to be clear.

Wayne

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
Sent: Tuesday, April 23, 2013 2:43 PM
To: [log in to unmask]
Subject: [TN] Rigid Flex Rigid hybrid FR4 PWB

Fellow TechNetters:

   Is it t appropriate to Thermal Stress, Solder Float, a hybrid FR4 Printed Wire Board?   Is this construction an acceptable practice with IPC Standards?   Is there a document that describes this Test method?   Anyone willing to share their experience.

Victor,

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