Where was the wicking photo place at for viewing.   Neg/Pos etch back always interest me.   Where can I learn more about the creation of this artifact in the PWB/PCB plating process.

Victor,

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Whittaker, Dewey (EHCOE)
Sent: Wednesday, August 14, 2013 9:23 AM
To: [log in to unmask]
Subject: Re: [TN] [IPC-600-6012] Wicking Requirement IPC 6012B/3A vs 6013C/3A

Better now than when asking for type AB- negative blood. 
Dewey
-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of karl sauter
Sent: Tuesday, August 13, 2013 4:33 PM
To: [log in to unmask]
Subject: Re: [IPC-600-6012] Wicking Requirement IPC 6012B/3A vs 6013C/3A

Typo - 0.5 mils not inches.


On 8/13/2013 4:00 PM, Bill Ortloff wrote:
> Karl,
> Do you really mean 0.5 inches?
>
> [log in to unmask]
>
>
> ----- Original Message -----
> From: karl sauter [[log in to unmask]]
> Sent: 08/13/2013 02:38 PM MST
> To: <[log in to unmask]>
> Subject: Re: [IPC-600-6012] Wicking Requirement IPC 6012B/3A vs 
> 6013C/3A
>
>
>
> Pete,
>
> Would be good to have crossection slightly micro-etched in order to 
> show the demarcation between inner layer foil and PTH plated copper at 
> the interconnect.  Then can distinguish between extent of etchback 
> from extent of Cu wicking.
>
> Etchback of more than 0.5 inches suggests excessive and/or non-uniform 
> desmear.
>
> Regards,
> Karl Sauter
> Oracle Corporation
>
>
> On 8/13/2013 2:19 PM, Pete Menuez wrote:
>> Hello All -
>>   This isn't the best picture but it is all I have.
>>   This cross section is being evaluated to IPC 6012 Rev B Class 3A 
>> and is being rejected for wicking in excess 2 mils.  Is this, in you 
>> all's opinion, wicking or is this the effect of plasma etch/resin 
>> removal/glass etch and not wicking?  How should this be evaluated 
>> under B/3A?
>>   How would this be evaluated in 6012 Rev C Class 3A?  Could you even 
>> evaluate it since this is before etch?
>>   Comments are greatly appreciated.  Btw, I'm not trying to save 
>> anything.
>> This panel has already been scrapped out - I have a presentation with 
>> my customer and I'd like to offer more opinion than just my own and 
>> the board fab.
>>     Thanks,
>> Pete
>>                       Peter Menuez
>> Supplier Quality Engineering Manager
>> L-3 Communications Cincinnati Electronics
>> 7500 Innovation Way
>> Mason, Ohio 45040
>> [log in to unmask] <mailto:[log in to unmask]>
>> 513-573-6401 Voice
>> 513-767-3778 Cell
>>
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