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June 2006

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Subject:
From:
Richard Kraszewski <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Richard Kraszewski <[log in to unmask]>
Date:
Tue, 20 Jun 2006 10:49:30 -0500
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As you may already know IPC CC 830 recommends 1 - 3 mil.  

When you start increasing the thickness you have to be careful that you truly dry out all of the solvent. In my experience, thicker coatings leave you more susceptible to "skinning over".

While skinned over parts may look & feel cured, they will be more likely to fail any sort of thermal shock or cycle test regimen. 

Rich K / KEDS


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bremer, Gary
Sent: Tuesday, June 20, 2006 11:35 AM
To: [log in to unmask]
Subject: [TN] Conformal Coat

Engineering is recommending that we increase the thickness of the AR coating to .005 ± .002 to seal the boards against moisture. These boards are used on Boeing aircraft, my thought is to use UR coating due to the environment these boards are used.

 

Is the Acrylic conformal coating the best choice for this application?

 

Are there any problems with increasing the thickness of the Acrylic conformal coating?

 

This box is open to the environment and with my knowledge of the mounting location the sanitary lines could be located above the electronics.

 

Thanks

Gary Bremer
Senior Manufacturing Engineer, CIT
  
Curtiss-Wright Controls Inc. 
Embedded Computing -Subsystem

28965 Avenue Penn
Santa Clarita, CA 91355-4185
Main: 661.257.4430 extension 2170
Fax: 661.257.4782


e-mail: [log in to unmask] <mailto:[log in to unmask]> 
Web: www.cwcembedded.com <http://www.cwcembedded.com>  

NOTICE: This e-mail communication is private and confidential and is intended for the addressee only. The email may only be used for conducting business with VISTA Controls Inc., dba Curtiss-Wright Controls Embedded Computing Subsystems. If you are not the intended recipient, please notify us by replying to this email followed by deleting the email and all attachments from your system. Anyone other than the intended recipient or those with a need to know within the recipient's organization is strictly prohibited from using, printing, distributing or disseminating the email or any information or attachment contained therein.

 


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