Hi Lou,

Being a solder mask service we have had the opportunity to apply Dry Film 
Solder Mask (DFSM) on printed circuit boards with a black oxide finish many 
times and from many different circuit board manufacturers.

Once the protocol was established with the circuit board manufacturer on how 
to properly supply the product to us for solder mask application there was no 
problems.  After shipping product we never heard of any problems from 
manufactures.

While I have not seen the volume of this type of surface finish recently I 
find that this finish is an excellent surface (excellent adhesion) for the 
application of DFSM.

Regards,

Frank Kurisu
SolderMask, Inc.
Huntington Beach, CA 
[log in to unmask]
----------
From: 	[log in to unmask]
Sent: 	Wednesday, September 25, 1996 11:06 AM
To: 	[log in to unmask]; [log in to unmask]
Subject: 	Black oxide on outer layers

Greetings !

The Fab house that we use has recently asked us if they could use a black 
oxide treatment on external layers of our designs. I know that this process 
is used for internal layers but I want to know if any of you have used it 
for external layers ? Their reason for using it is " To create better 
adhesion for the solder mask and eliminate potential slivers ". To me, this 
sounds more like a process problem. What do you think ?

To recap, do any of you use a black oxide coating on outer layers ?   If so,
 why ?.   If not, why not ?

Thanks in advance for your help !

Lou Takach

Union Switch & Signal Inc.
412.688.2574 (voice)
412.688.2399 (fax)
[log in to unmask]

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to:           *
* [log in to unmask] with <subject: unsubscribe> and no text.        *
***************************************************************************


***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to:           *
* [log in to unmask] with <subject: unsubscribe> and no text.        *
***************************************************************************