AKP 0.00% $6.20 audio pixels holdings limited

Audio Pixels - Research Report - 24th Of June 2020, page-82

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    It's not debris, it's chemical residue. Debris came from broken features on turning the wafer over to etch the back side. That problem was solved. Residues came from processing chemicals, and likely only needed tweaks to rinsing procedures.
 
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