Subject: | |
From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Mon, 2 Feb 1998 22:38:44 -0000 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Joseph,
How do you propose to clean? What is the cleaning medium and temperature;
rinsing methods and, most particularly, your drying technique?
As many of the newer process materials contain surface tension reducing
agents (tensides or surfactants), the potential take-up of residues may
cause you problems.
Regards, Graham Naisbitt
__________________________________________________________________________
[log in to unmask]
Concoat Ltd
Alasan House, Albany Park
Camberley GU15 2PL UK http://www.concoat.co.uk
-----Original Message-----
From: Kane, Joseph <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: 02 February 1998 14:59
Subject: [TN] Moisture Sensitive Parts
>Anyone:
>
>Question on double sided SMT, RMA paste. After side 1 reflow, we plan
>to semi-aqueous clean (followed by a short bake at 85C) before any work
>on side 2. Will the short exposure to DI water in the rinse phase lead
>to any appreciable moisture uptake in PEM's? Or does the mechanism
>involve longer term exposure to atmospheric moisture? We could test
>samples, weighing before and after, but since the mix is considerable,
>advice on whether this is necessary would be welcome.
>
>Joe Kane
>Lockheed Martin Control Systems
>
>################################################################
>TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
>################################################################
>To subscribe/unsubscribe, send a message to [log in to unmask] with following
text in the body:
>To subscribe: SUBSCRIBE TechNet <your full name>
>To unsubscribe: SIGNOFF TechNet
>################################################################
>Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional
information.
>For the technical support contact Dmitriy Sklyar at [log in to unmask] or
847-509-9700 ext.311
>################################################################
>
>
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
################################################################
|
|
|