Eric,
Thanks for replying.
Are you a PCB Manufacture ?
The standards I need are for the removable solder mask put on by the PCB manufacture.

Our problem is with the removable solder mask that is put on by 
a PCB Manufacture in the states.

The only issue we had with over sea suppliers with the same part
was  filling in the small via holes and we were not able to get the mask out after wave solder.

Let me know what you have.



>>> Eric Kalgren <[log in to unmask]> 10/07/99 01:13PM >>>
Nancy, 

We use Kester TC527 latex mask.  It peels off and residues are cleaned.  We have not had any problems with it to date.

Hope this helps some.

Eric Kalgren
BFGoodrich Aerospace
Data Systems Division
[log in to unmask] 
(505) 938-5139

>>> Nancy Trumbull <[log in to unmask]> 10/07/99 06:12AM >>>
HI Technetters,

Every one did so good for me on the electrical migration 
that I'm back.


Problem: Solder is seeping under the removable solder mask during wave solder. Key word :REMOVABLE

Investigation: Indicates Poor process at the supplier
Supplier states "that this problem is typical of removable solder mask
made in the states".
Key words :made in the States.
  Because they can not use the same type of material
 as over sea.

   I have IPC-SM-840C
 Qualification and Performance of Permanent Solder Mask
This does me no good.


Our Supplier will remove some of the ID landing.  Which should stop the seepage during wave solder.

But I would like more information on Removable Solder Mask 
Standards in the States.

I have ask for information on removable solder mask before and
got no reply .  Could this be something fairly new for the states?
My pass experience has always been with over sea suppliers 
for this type of product.

Thanks to all that reply in Advance
Nancy

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