20210621 photolitho
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Revision as of 11:27, 21 June 2021 by Dagkd@uio.no (talk | contribs) (Created page with "* Opened new package of 4" wafers * Plasma treated + 15 min+ @135C * SU8 spread 60s@600rpm, then 40s@1700rpm for 50 um * Both wafers have several holes in su8 layer, I do ont...")
- Opened new package of 4" wafers
- Plasma treated + 15 min+ @135C
- SU8 spread 60s@600rpm, then 40s@1700rpm for 50 um
- Both wafers have several holes in su8 layer, I do ont know if this is due to dirt/dust on wafers or tiny air bubbles in SU8. 2nd wafer I tried to mend initial holes, but it did not help.
- Not much SU8 left in syringe, maybe that is whey there were air bubbles? Removed stock bottle from fridge to replenish SU8 in syringe before end of day.
- 11:15 prebake started on VWR hotplate
