Received: |
by ipc.org (Smail3.1.28.1 #2)
id m0vXZc8-0000bAC; Tue, 10 Dec 96 15:21 CST |
Old-Return-Path: |
|
Date: |
Tue, 10 Dec 96 11:11:59 PST |
Precedence: |
list |
Resent-From: |
|
Resent-Sender: |
|
From [log in to unmask] Tue Dec 10 17: |
05:39 1996 |
Status: |
O |
X-Mailing-List: |
|
TO: |
|
Return-Path: |
<TechNet-request> |
Resent-Message-ID: |
<"v44RG1.0.FPA.EHTho"@ipc> |
Subject: |
|
From: |
|
X-Status: |
|
X-Loop: |
|
Message-Id: |
|
Parts/Attachments: |
|
|
Is the peeling of the soldermask occurring on the circuits
or on ground plane areas?
You might also want to check the date codes of the boards
that peel against those in the lot that do not exhibit this problem.
It is kind of strange that you would have this problem with
3 fabricators at the same time.
Terry Pearo
Marcel Electronics
______________________________ Reply Separator _________________________________
Subject: Re[4]: Soldermask peeling
Author: [log in to unmask] at Internet
Date: 12/10/96 10:46 AM
We don't clean our boards after assembly. We use an Alpha no
clean flux, SM351. The peel is noticed immediately after
wave. It doesn't affect all boards. In a controlled test 3
out of 12 peeled.
This is a SMOBC, LPI soldermask. Raw boards are stored at 70
Degree F at 10-15% humidity. We don't bake prior to assembly.
Of the Suppliers boards that failed, two of the three were
received and processed within one week.
______________________________ Reply Separator _________________________________
Subject: Re: Re[2]: Soldermask peeling
Author: [log in to unmask] at Internet
Date: 12/10/96 8:40 AM
The one thing that concerns me is your comment
that you (an assembler) are experiencing the problem
with more than one board fabricator. To me that
indicates that the cause is the assembly process rather
than having all fabricators exhibiting the same problem
at the same time.
Does the mask peel immediately after assembly or
is it noted after cleaning
Susan Mansilla
Robisan Labs
317-353-6249
***************************************************************************
* 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. *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [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. *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [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. *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] *
***************************************************************************
|
|
|