Electronics Forum: nasa (Page 1 of 9)

silicone conformal coat and electrical contacts

Electronics Forum | Thu Feb 01 08:47:07 EST 2007 | davef

NASA is concerned about outgassing in high-vacuum environments. They select materials to minimize outgassing. http://outgassing.nasa.gov/og_desc.html

Solder joint cleanliness

Electronics Forum | Sat Feb 10 09:29:08 EST 2007 | davef

NASA requirements may be a good starting point http://www.hq.nasa.gov/office/codeq/solder.htm

Baking assemblies after ultrasonic water wash

Electronics Forum | Thu Jun 11 22:57:45 EDT 2009 | davef

NASA recommends baking a PCB for a minimum of 4 hours at 93+/- 5.5�C before conformally coating. [NASA-STD-8739.1, �Workmanship Standard for Staking and Conformal Coating of Printed Wiring Boards and Electronic Assemblies,� August 6, 1999]

Toe down configuration

Electronics Forum | Sun Jul 31 10:06:51 EDT 2011 | davef

Try the NASA Workmanship Standards Inspectors Pictorial Reference document: http://workmanship.nasa.gov/lib/insp/2%20books/frameset.html Look at Section 7.08 SURFACE MOUNT TECHNOLOGY (SMT) BUTT "I" LEADED PACKAGES

PCB FINISH FOR HIGH PIN COUNT SAC ALLOY BGA

Electronics Forum | Fri Jun 03 16:00:44 EDT 2016 | davef

"aerospace" + "harsh environment" = NASA NASA BGA Guidelines - chrome-extension://gbkeegbaiigmenfmjfclcdgdpimamgkj/views/app.html

Lead Free

Electronics Forum | Tue Feb 03 21:36:29 EST 2009 | davef

NASA gets itself in a froth about the potental for whisker growth in high tin solders used in space applications.

American RoHS

Electronics Forum | Fri Jun 05 15:13:51 EDT 2009 | patrickbruneel

Look in attachment what NASA has to say about lead free electronics

Conformal Coating Coverage on Side of IC

Electronics Forum | Tue Sep 22 11:33:08 EDT 2009 | jdumont

Good ol NASA... thanks Dave

LED lifted soldering defect

Electronics Forum | Tue Dec 24 20:04:04 EST 2019 | kylehunter

Hmm OK. Even a NASA article describes that rosin is safe not being cleaned lol.

Propensity of Immersion Tin surface finish fo whiskers

Electronics Forum | Sat Dec 10 08:13:53 EST 2005 | davef

We believe imm tin suppliers say that their product does not whiskey, oops whisker, because they use 'white tin' not the 'gray tin' that causes whiskers. But as soon as you alloy their tin with SAC or any other high tin content solder, all bets are


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