Subject: | |
From: | |
Date: | Wed, 28 Aug 96 08:17:27 cst |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Hi Barry - I suggest having an in-depth discussion with your vendor
before switching to a matte soldermask. Soldermask may or may not be
the source of their problems. There is quite a bit of literature
published describing how a matte soldermask is not a prone to
solderball/splatter as a glossy soldermask. Yet, we use a glossy
soldermask in nitrogen with a low residue flux and have no problems
with solderball/splatter type defects. There are lots of other
contributing variables (flux type/chemistry is ultra critical in many
instances) that may be the root cause for their defects. Do a sanity
check on their investigation and solution before you switch. Good
luck.
Dave Hillman
Rockwell Collins
[log in to unmask]
______________________________ Reply Separator _________________________________
Subject: assy: matte or glossy soldermask?
Author: [log in to unmask] at ccmgw1
Date: 8/27/96 5:55 PM
Greetings!
We are relatively new to the SMT assembly business. Our
vendor wants to switch from a glossy to a matte surface
soldermask to eliminate a process problem on their end.
Are there any issues we need to consider? I seem to recall
a discussion about solder balls hating matte finish.
Thanks
Barry Allen
SED Systems Inc.
[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. *
***************************************************************************
|
|
|