<azonenberg>
or you end up doping with B and Na instead of B
<azonenberg>
etc
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<nmz787>
does anyone have an idea for how to sense the thickness of the bottom of a concave hole formed by drilling with a drill bit?
<nmz787>
basically i have this problem where i need to drill until 15 or 20 microns of material remains, then transfer from the machine shop to an ion beam mill
<nmz787>
if the material is too thick, the ion mill can't finish the pinhole
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<Sync_>
nmz787: how large of a hole?
<Sync_>
if it is large enough I'd just used a dowel to measure the distance that is not concave and then measure the drill
<Sync_>
because the tip of the drill is not going to change
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<hozer>
what are you making?
<azonenberg>
hozer: sounds like TEM sample prep
<nmz787>
azonenberg: i believe that's what it is
<nmz787>
Sync_: i believe the drill bit is at most 2mm, but maybe 0.5mm... i didn't ask... the pinhol is around 10 or 15 microns wide
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<Sync_>
I'd use a pin to measure the depth
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