Hi More than sketchy, it sounds a bit crazy.
MEMS are not a lot different than any IC in that you can get packaging issues. Put them in a high pressure “bomb” test and you will see the same issues that you do on any IC. The gotcha is that an IC is die coated and a MEMS oscillator likely is not. They should get packaged accordingly (= a low leakage package). Getting anything into a package at normal atmospheric pressure … not so much. Bob > On Oct 30, 2018, at 8:44 AM, jimlux <jim...@earthlink.net> wrote: > > On 10/30/18 3:50 AM, Adrian Godwin wrote: >> How sensitive to atmospheric environment are MEMs oscillators ? >> https://www.reddit.com/r/sysadmin/comments/9si6r9/postmortem_mri_disables_every_ios_device_in/ >> It gets closer to time-nuts territory in the earlier discussion - see >> captaincool's contribution some way down : >> https://www.reddit.com/r/sysadmin/comments/9mk2o7/mri_disabled_every_ios_device_in_facility/ > > The helium leak sounds a bit sketchy, especially when you're talking about a > system that has large RF and magnetic fields. Why would a MEMS resonator > care about what gas it is surrounded by. > > That said, I recall someone telling me about problems with early MEMS RF > switches and needing some trace amount of water vapor to make them work - > work fine on the bench, but them into thermal vacuum testing and after some > amount of time they stop working, as the H2O diffuses out of the > (non-hermetic) packages. > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
