Morning John, how goes the battle? In my opinion I think all issues are
covered. One question - could the bottom picture on page 78 of 600F spec.
also be used for negative etchback show & tell?.

regards - Ken

-----Original Message-----
From: John Perry [mailto:[log in to unmask]]
Sent: Thursday, May 11, 2000 12:27 PM
To: [log in to unmask]
Subject: [IPC-600-6012] New Photos for Review


Colleagues,

I've attached a number of photographs related to lifted lands, negative
etchback, plating voids, etc.  I'd like the group to review them for
possible inclusion within the future visual board acceptance standard,
whatever that may turn out to be.

I'd like to know if any of the following would be more descriptive/useful
than what is currently found within the following sections of the
IPC-A-600F, for:

2.10.3 External Annular Ring.  Image "Z Axis misregistration" included here.

3.1.5.2 Negative Etchback.  Images "Negative Etchback" and "Negative
Etchback2" are included here.

3.3.2 Lifted Lands.  Images "Lifted Land1" and "Lifted Land2" are included
here.

3.3.3 Plating Crack - Foil.  Image "Foil Crack" is included here.

3.3.9 Plating Voids.  Images "Void at Interface" and "Void at Interface2"
are included here.

3.3.12 Innerlayer Separation - Vertical Microsection. Images "Interface
Separation" and "Interface Separation2" are included here.

3.3.13 Innerlayer Separation - Horizontal Microsection.  Images "Z Axis
Separation 1" and "Z Axis Separation 2" are included here.


Looking foward to everyone's input.


Best Regards,


John Perry
Technical Project Manager
IPC
2215 Sanders Road
Northbrook, Il 60062
1-847-790-5318 (P)
1-847-509-9798 (F)
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