Ok my own thread about this with some Friday decap.

Package prep with laser: https://www.youtube.com/watch?v=Bjaqd3vPMo8">https://www.youtube.com/watch... Turn on 2X speed. Stay tuned for die and ROM pictures (hopefully) https://twitter.com/Foone/status/1301707401024827392">https://twitter.com/Foone/sta...
Prep before acid bath.
Prep before acid bath.
Prep before acid bath.
Prep before acid bath.
Decapsulation process: https://www.youtube.com/watch?v=DKu9cUh7dIE">https://www.youtube.com/watch... should be 4K eventually when YT will finish decoding.

Result just from a single drop.
After repeating the same process multiple times we the die out.
Layers and date. It says 2004 but process technology looks like from late 80s maybe 90s.
Logo.
Chinese anyone? 金科 JINKE?
HOLTEK HT48C06 UI22UI002
Some quick imaging and stitching.
You can follow @vpikhur.
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