Electronics Forum: nasa (Page 3 of 9)

Problems with .45 mil ball diameter BGA....

Electronics Forum | Tue May 03 05:46:43 EDT 2005 | mattkehoe

Consider ssd for your BGA's. http://www.sipad.com/SIPAD_NASA_Plots.htm www.sipad.net mkehoe@sipad.net

reflo oven settings

Electronics Forum | Thu Mar 16 10:17:57 EST 2006 | cyber_wolf

Larry...LISTEN ! : From my experience you are asking for trouble by thinkin what ur thinkin. The scary part is that you probably supply plasma arc accumulator boards for NASA.

How much capacitor offset is acceptable?

Electronics Forum | Mon Dec 18 18:27:29 EST 2006 | bigdaddysoy9

This is end overhang: http://workmanship.nasa.gov/lib/insp/2%20books/links/sections/graphics/705/705-24.gif

Conformal Coat Thickness

Electronics Forum | Mon Jul 23 16:13:43 EDT 2007 | davef

It's it curious that NASA requires 'Thickness measurements shall be made with a wet film thickness gauge or equivalent tool' yet specifies 'cured thickness' as a measure. Why do you recon they do that?

Conformal Coat Thickness

Electronics Forum | Tue Jul 24 13:41:41 EDT 2007 | jdumont

We just measure the coupon before and after. We are always btw .002" - .003" acrylic. No auditor will say a word if you are doing this much control. Unless its NASA I suppose..... we've never had a problem with any of the avionics guys doing this tho

Rollback the Lead-Free Initiative by Dr. Howard Johnson

Electronics Forum | Mon Jul 14 11:35:09 EDT 2008 | stepheniii

NASA won't allow a pure tin finish in space. Any part with a pure tin finish must be recoated.

What material to use for component staking?

Electronics Forum | Mon Jan 18 15:07:12 EST 2010 | mikesewell

Usually the print specifies the material since the design is qualified with it in place. I've used several from Scotchweld 2216, Scotchweld DP190, Hysol E-20HP, to NASA outgassing qualified Masterbond 10HT.

NASA-UA report

Electronics Forum | Mon May 23 14:33:03 EDT 2011 | patrickbruneel

Latest news on this issue http://circuitsassembly.com/cms/news/11230-report-tin-whiskers-a-culprit-in-toyota-ua

NASA-UA report

Electronics Forum | Thu Oct 06 10:05:33 EDT 2011 | dougt

Toyota was looked at because of the problems they had, I was led to believe that the outcome was determined to be the petal size and location. If other auto manufacturers equipment was looked at I wonder if tin wiskering would be found? I think Toy

Another interesting article on tin whiskering

Electronics Forum | Thu Feb 17 10:25:16 EST 2011 | teramisu

I found this revealing: NASA found all sorts of tin whiskers in the Toyota recalls. http://circuitsassembly.com/cms/news/10816-toyota-etc-absolved-of-ua-but-sn-whiskers-found


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