The following message is posted at the request of the leaders of the IPC Cleaning and
Coating Committee:
Recently we posted a TechNet message (included below) polling interest in having a
conformal coating discussion. The original question was based on feedback from users
about various attributes of coatings. We were surprised at the number of responses
we received and their associated comments. There were a considerable number of
people who want to have a general discussion of this topic.
Based on this feedback, a session titled "Conformal Coatings Performance
Considerations" will be held as part of the IPC/SMTA Electronics Assembly Expo in
Providence RI on Wednesday afternoon, 28 October, from 1:30-3:00 PM. This will be a
FREE forum/panel discussion for people to air their questions and concerns about the
use of conformal coatings. If participation warrants pursuing the topic, a second
forum/panel discussion will be set up for IPC Printed Circuits Expo (March 1999 in
Long Beach) to gather additional information. From that a decision would be made on
whether or not further work should be pursed by the IPC Cleaning and Coating
Committee to develop additional standards, guidelines, etc. addressing conformal
coating design, application and testing issues. The current document IPC-CC-830A only
addresses qualification of a coating material and does not address use.
The session will start off with short presentations by users, customers and material
suppliers on application, performance and design topics associated with conformal
coatings followed by an audience/panel question and answer session. It must be
stressed that this session is designed to be an objective information gathering
exploration of conformal coating performance considerations for all types of coatings
and for all applications. As always, any pertinent data associated with the topics
that can be shared with participants would be appreciated.
If you are interested in attending the session, please respond back to IPC
([log in to unmask]) so we will have an indication of the room size required. For
more information about IPC/SMTA Electronics Assembly Expo, go to
http://www.ipc.org/html/framesetEAEexpo.html
------ Following is the Original 18 August 1998 TechNet Message ------
Recently there have been several questions on actual long term field performance of
conformal coatings based on several anecdotal observations. There are numerous
specifications and standards that address conformal coating material
performance/qualification, design and application requirements. However, very little
documented correlation exists between design requirements and actual long term
performance under field conditions. In addition, standard communication of design
requirements related to conformal coating and what performance should reasonably be
expected from such coatings (i.e., the myth that conformal coatings are impervious to
water/water vapor, etc.) does not appear to be clearly and/or readily recognize in
the industry.
IPC and the Cleaning and Coating Committee are considering holding a forum/panel
discussion on the above issues at the fall IPC committee meetings to be held as part
of IPC/SMTA Electronics Assembly Expo in Providence, RI October 24-29. Several users
and customers (FAA, etc.) have expressed interest in such a forum. The objective
would be to have a short presentation from conformal coating users, FAA, material
suppliers, etc., addressing the above issues and any data supporting recommendations
whether or not further work should be pursed by IPC membership in this area.
Here's where we need your help! We're trying to determine if there is a significant
interest from IPC members and other users to support holding such a discussion in
Providence.
If your believe the subject is of sufficient interest and would consider attending an
open panel discussion, audience question and answer session on this subject, please
contact Jack Crawford a the IPC ([log in to unmask]) by 28 August to indicate your
level of interest. We will use the results of this poll to determine if such a
session should be organized.
------ End of 18 August TechNet message ------
IPC HAS A NEW PHONE SYSTEM!! EXTENSIONS HAVE CHANGED!!
Be sure to listen to the prompt for new directions. 8/20/98
IPC/SMTA Electronics Assembly Expo
Technical Committee Meetings, Conference, Exhibits
Providence RI October 24-29
More info at http://www.ipc.org
Jack Crawford, IPC Project Manager - Assembly
2215 Sanders Road, Northbrook IL 60062-6135
[log in to unmask] NEW DIRECT NUMBER 847-790-5393
fax 847-509-9798
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