12 ms·
>They were very serious about this stuff, for obvious reasons. No rework possible in space. There are other reasons that may be less apparent, like the fact th
by bumby 3y ago
>They were very serious about this stuff, for obvious reasons. No rework possible in space.
There are other reasons that may be less apparent, like the fact that materials can have weird properties in space. One example is solder "whiskering"[1]. I believe NASA requires techs to be certified to the IPC-JSTD [2].
[1] https://nepp.nasa.gov/whisker/ https://nepp.nasa.gov/whisker/
[2] https://www.ipc.org/ipc-certifications https://www.ipc.org/ipc-certifications
- Clamchop 3y agoNote that tin whiskers happen in air here on Earth, too. Not a thing that only happens under vacuum.
- instagib 3y agoWhisker growth rates from 0.03 to 9 mm/yr have been reported. There are some elimination methods such as conformal coatings (very hazardous) and plating finishes (nickel/gold/palladium) that have been tested. I got certified by the IPC-J-STD-001H also soldering 201 surface mount components 0.6x0.3x0.25mm 0.05W handling.