Sorry,
I forgot to clarify that NASA-STD-8739.1A is the standard we and all of our supply chain use today for conformal coating.
Rigo
Principal Flight Hardware Technology Assurance Engineer
NASA, Goddard Space Flight Center
Workmanship Standards, Code 300
Phone. (301) 286-6129
Fax. (301) 286-6576
-----Original Message-----
From: Garcia, Rigo (GSFC-300.0)[ARES CORP]
Sent: Thursday, March 21, 2013 11:30 AM
To: [log in to unmask]; [log in to unmask]
Subject: RE: [TN] Conformal Coat and Bubbles
Hi Doug,
Are you familiar with NASA-STD 8739.1A?
This standard answers most of the questions you are posing.
Rigo
Principal Flight Hardware Technology Assurance Engineer NASA, Goddard Space Flight Center Workmanship Standards, Code 300 Phone. (301) 286-6129
Fax. (301) 286-6576
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
Sent: Thursday, March 21, 2013 11:19 AM
To: [log in to unmask]
Subject: [TN] Conformal Coat and Bubbles
OK, Minions, your next question in the quest to improve J-STD-001 and
A-610 relates to bubbles in the conformal coating.
I think we can all agree that the ideal conformal coating layer contains
no bubbles or voids and is "purdy". BUT:
1. Are there bubbles in coatings in areas where they will not impact reliability and their presence should be viewed as a "Process Indicator"?
If so, where and what limits would you use?
2. What would you classify as a bubble requiring disposition, i.e.
Becomes an actionable defect? If so, where and why?
3. Would any of your answers change depending on what KIND of coating it is, i.e. Acrylic vs. silicone vs. Parylene?
Well, OK, that is three questions. I'm on a roll.
Doug Pauls
Chairman, IPC Cleaning and Coating Committees Galactic Emporer
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