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Specific Process Knowledge/Thin film deposition/Deposition of Zinc: Difference between revisions

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[[File:Al w Zn from 20-06-2018.png|400px|left|thumb|XPS of Al film made before chamber was cleaned after Zn deposition. 10 scans per level. Zn peaks are obvious. The Zn content was up to 10 % in some layers.]]
[[File:Al w Zn from 20-06-2018.png|400px|left|thumb|XPS of Al film made before chamber was cleaned after Zn deposition. 10 scans per level. Zn peaks are obvious. The Zn content was up to 10 % in some layers.]]
[[File:Al wo Zn from 09-07-2018.png|400px|right|thumb|XPS of Al film made after chamber was cleaned after Zn deposition and a new crucible was used for Al. 10 scans per level for Al, 30 scans per level for Zn. No Zn peaks are visible.]]
[[File:Al wo Zn from 09-07-2018.png|400px|left|thumb|XPS of Al film made after chamber was cleaned after Zn deposition and a new crucible was used for Al. 10 scans per level for Al, 30 scans per level for Zn. No Zn peaks are visible.]]




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===Lessons for future thermal deposition of Zn (by Rebecca Ettlinger) ===
===Lessons for future thermal deposition of Zn (by Rebecca Ettlinger) ===
*It is better to use a crucible rather than a W boat to heat small Zn pellets, as the pellets sometimes jumped out of the boat when they got hot.
*It is better to use a crucible rather than a W boat to heat small Zn pellets, as the pellets sometimes jumped out of the boat when they got hot.
*Do the deposition in manual mode as the power level for evaporation was not consistent and the rate was not constant even at a constant power level.
*Consider using manual mode as the power level for evaporation was not always consistent and the rate was not constant even at a constant power level. See further below, however.
*We needed about 12-13 % power on the Lesker Nano36 Thermal evaporator to get Zn evaporation. It is best to soak for a long time(e.g., ramping and soaking for more than 5-8 minutes).
*We needed about 12-13 % power on the Lesker Nano36 Thermal evaporator to get Zn evaporation. It is best to soak for a long time(e.g., ramping and soaking for more than 5-8 minutes).
*The thickness /rate measurement may not have been accurate as the crystal monitor looked irregularly coated after the deposition.
*The thickness /rate measurement may not have been accurate as the crystal monitor looked irregularly coated after the deposition.
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