Victor,
OK, I'll take a stab at it since all you go so far is ZZZZZZZZZZ's :-/ Since I didn't find anything in the documentation I had access to that would cover this, my guess is what the master drawing states and if that isn't covered on the drawing, the vendor should have data for this issue. It sounds like the amount depends on the squeeze out of the resin in the rigid flex interface area. The fact that it's not even may be due to the copper in the area which may make it unpredictable to some degree. It's interesting that there was no simi-rigid strain relief at the interface since that squeeze out creates that knife edge issue and can cut the cover layer, etc. I know this isn't the best answer and may not in fact BE an answer, but it is a slightly educated guess at best and not ZZZZ's. :-)
On a similar note, a few years ago I had a rigid-flex design that the manufacture had routinely put the strain relief on the edge even though I didn't have it called out on the drawing. I figured it was standard practice. WRONG! We had sent the design to another vendor and when we got them back they didn't have the interface area covered. When I questioned them on it they just said, "it wasn't on the drawing so we didn't do it". Note to self, put it on the drawing if you want it there no matter how nice one vendor is, there is always another that doesn't see it that way... Oh and speaking of seeing it, there was another process to get pictures posted to here but I don't recall who was doing it, perhaps they will chime in on that now also?
Scott Decker | Senior Engineer, PCB Design Services CID+ | Electronic Systems Center
COLLINS AEROSPACE
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of [log in to unmask]
Sent: Wednesday, January 22, 2020 11:14 AM
To: [log in to unmask]
Subject: [External] [TN] FW: IPC-2223D, Sectional Design Standard for Flexible/Rigid-Flexible Printed Board
Fellow Tech Netters,
Perhaps it was too early in the morning for Rigid Flex PWBs questions.
Therefore, I post the second time in hope that everyone is awake.
I send some pics to Steve Gregory mail box.
Victor,
From: Hernandez, Victor G <[log in to unmask]>
Sent: Wednesday, January 22, 2020 6:01 AM
To: TechNet E-Mail Forum
Cc: Hernandez, Victor G
Subject: IPC-2223D, Sectional Design Standard for Flexible/Rigid-Flexible Printed Board
Fellow Tech Netters,
I would like a clarification on the above stated standard.
Post Router Process:
* How much PWB laminate material flashing is allowable exiting the rigid flex construction.
* One side measures 5 mils and the other 25 mils.
* No Strain Relief Fillet material utilized.
Where can I upload pics?
Victor,
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