Received: |
by ipc.org (Smail3.1.28.1 #2)
id m0wdd1M-000BjMC; Mon, 16 Jun 97 09:44 CDT |
Content-Type: |
TEXT/PLAIN; charset=US-ASCII |
Old-Return-Path: |
|
Date: |
Mon, 16 Jun 1997 10:56:27 -0400 (EDT) |
Precedence: |
list |
Resent-From: |
|
Resent-Sender: |
|
MIME-Version: |
1.0 |
From [log in to unmask] Tue Jun 17 11: |
36:48 1997 |
X-Mailing-List: |
|
X-Sender: |
lenny@emxmain |
TO: |
|
Return-Path: |
<TechNet-request> |
X-Status: |
|
Status: |
O |
X-Loop: |
|
Resent-Message-ID: |
<"ZS9dr2.0.zv6.O5Lfp"@ipc> |
Subject: |
|
From: |
|
>From willli Mon Jun 16 09: |
45:04 1997 |
In-Reply-To: |
|
Message-ID: |
<Pine.SCO.3.95.970616105048.25949B-100000@emxmain> |
cc: |
|
Parts/Attachments: |
|
|
LARRY,
PLEASE BE AWARE THAT EPOXY BASED LPSM CANNOT BE STRIPPED AFTER BAKING, THE
SOLVENT NECESSARY WOULD ATTACK THE BUTTER LAYER. ONLY NON-EPOXY CAN BE
STRIPPED EFFECTIVELY, 130-150 F, PH>13 AND WITH AN RBP-CHEMELEX PROPRIETARY
SOLDERMASK REMOVER, ONLY 3 HOURS IS NECESSARY.
BEST REGARDS,
LENNY KURUP
[log in to unmask]
On Sun, 15 Jun 1997 [log in to unmask] wrote:
> I'm not sure if it has tremendously improved over the past two years;
> however, most PWB shops will try to strip LPI masks (even after final cure)
> in preference to scrapping out the boards.
>
> The basic requirements for stripping cured LPI solder masks after final cure
> are:
> 1. High pH (>13.0)
> 2. High temperature (150-180 deg F)
> 3. Patience (it could take up to 48 hours)
>
> A number of companies have proprietary solder mask strippers on the market
> which work well. Examples would include: Alpha Metals, Oliver Sales, Dexter
> Electronic Materials, etc.
>
> Hope this helps
>
> Larry Fisher
> Dexter Electronic Materials
> [log in to unmask]
>
> ***************************************************************************
> * TechNet mail list is provided as a service by IPC using SmartList v3.05 *
> ***************************************************************************
> * To subscribe/unsubscribe send a message <to: [log in to unmask]> *
> * with <subject: subscribe/unsubscribe> and no text in the body. *
> ***************************************************************************
> * 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 subscribe/unsubscribe send a message <to: [log in to unmask]> *
* with <subject: subscribe/unsubscribe> and no text in the body. *
***************************************************************************
* 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] *
***************************************************************************
|
|
|