Subject: | |
From: | |
Reply To: | |
Date: | Fri, 25 Oct 2013 19:45:19 +0000 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
I was reviewing a process specification regarding Type UR conformal coating and it contained a sentence which struck a nerve.
This particular specification stated that the thickness shall be .003"+/-.002" and .010" maximum if two coatings are applied.
I always thought there was a good reason why the coating should not exceed .005" such as CTE mismatch which might cause cracking of the coating or perhaps worse, component damage in thermal cycling. But I haven't found any papers to that effect yet.
Naturally, any comments/experiences from this forum will be appreciated, especially if I am completely off based.
Phillip Bavaro
Senior Manufacturing Engineer, Manufacturing Engineering
L-3 Telemetry-West
9020 Balboa Ave. | San Diego, CA 92123
858-694-7874 | 858-740-8260 mobile
[log in to unmask]<mailto:[log in to unmask]> | L-3com.com/TW
________________________________
This message and any attachments are solely for the use of the addressee and may contain L-3 proprietary information that may also be defined as USG export controlled technical data. If you are not the intended recipient, any disclosure, use or distribution of its content is prohibited. Please notify the sender by reply e-mail and immediately delete this message and any attachments.
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
|
|
|