Naslov
A comparative study of the stability of hard coatings produced with and without ion assistance

Autori
Zorc, Hrvoje ; Snowdon, Kelly ; Johnson, Robert ; Morin, Steven

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
41st SVC Annual Technical Conference / SVC - Boston (MA) : SVC, 1998, 821-826

Skup
41st SVC Annual Technical Conference

Mjesto i datum
Boston (MA), Sjedinjene Američke Države, 16.04.1998. - 20.04.1998

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
thin films; multilayers; ion assisted deposition

Sažetak
A primary requirement of a precision optical coating is long-term and short-term stability. The spectral features of conventionally deposited (e-beam gun generated vapor cloud depositing onto heated substrates) hard oxide coatings are sensitive to temperature and humidity changes due to the relatively high degree of columnar structure and the concominant low packing density that results from conventional hard oxide deposition. Coatings deposited using ion assisted deposition (IAD) exhibit significantly higher packing densities and, therefore, are less sensitive to environmental changes. A small environmental chamber designed to mount in spectrophotometer has been constructed to study the influence of temperature and humidity changes on the spectral performance of coatings. We will reposrt on the results of studies of thermally induced changes in the spectral performance of optical multilayers produced both conventionally and with IAD. The chamber enables us to study these systems at temperatures ranging from -15 deg C to +200 deg C in air and vacuum. reversible and irreversible phenomena such as water sorption and desorption will be discussed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA