Problem raith SNF 2007-02-15 17:43:49: Std sample holder out of level on Piezo post

jwc at jwc at
Thu Feb 15 17:43:50 PST 2007

The RAITH 150's Std sample holder is out of level as it lands on Piezo post mounts by a total delta WD of 0.514 mm.
The delta WD going from 0,0 UV to 1, 2.2 U,V on the standard layout for 100 mm wafers is + 0.0072 mm, increasing in the V axis.
Work around method until we repair the P1 Piezo post, which is damaged or simply worn out, is to do all your writes in U direction over a +- 2 mm range in V, then move to next V increment and adjust focus and write field alignment.
Users should carefully SEM and measure their patttern CD's to specification BEFORE PATTERN TRANSFER.

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