20210503 photolitho

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  • cleaned wafers with plasma only
  • 1st wafer Dag's patterns
    • 3100 RPM ~ 25 um, 1h rest
    • prebake on VWR hot plate
    • Masking with UV-Kub 2. UV at 11% intensity for 30 sec.
    • > 10 minutes rest
    • post bake on VWR plate
    • > 10 minutes rest
    • Developed 2:30 min in PGMEA, perfectly developed
    • 2h hard bake at 135C
  • 2nd wafer Anniken and Dag's patterns
    • 3100 RPM ~ 25 um, 1h rest
    • prebake on programmable hot plate
    • Masking with UV-Kub 2. UV at 11% intensity for 30 sec.
    • >10 minutes rest
    • Postbake on programmable hotplate
    • 15 minutes rest
    • Developed 2:30 min in PGMEA. Overdeveloped!