December 13, 2018
"Luch" quartz wristwatch IC : weekend die-shotInside old (199x) Belorussian wristwatch I've found this IC:
After metalization etch:
New let's take a look at quartz - tuning fork cut at XY plane:
You can see here marks from laser frequency tuning and pyramids in Z-direction, probably due to etching anisotropy.
You can see them overclocked here.