Abstract：
:The micro-capillary condensation of a new high boiling point organic reagent (HBPO), is studied in a periodic mesoporous oxide (PMO) with ∼34 % porosity and k-value ∼2.3. At a partial pressure of 3 mT, the onset of micro-capillary condensation occurs around +20 °C and the low-k matrix is filled at -20 °C. The condensed phase shows high stability from -50 < T ≤-35 °C, and persists in the pores when the low-k is exposed to a SF6-based plasma discharge. The etching properties of a SF6-based 150W-biased plasma discharge, using as additive this new HBPO gas, shows that negligible damage can be achieved at -50 °C, with acceptable etch rates. The evolution of the damage depth as a function of time was studied without bias and indicates that Si-CH3 loss occurs principally through Si-C dissociation by VUV photons.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Chanson R,Zhang L,Naumov S,Mankelevich YA,Tillocher T,Lefaucheux P,Dussart R,Gendt S,Marneffe JFdoi
10.1038/s41598-018-20099-5subject
Has Abstractpub_date
2018-01-30 00:00:00pages
1886issue
1issn
2045-2322pii
10.1038/s41598-018-20099-5journal_volume
8pub_type
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