CaF : An ESCA Study

T Raj; M Law

doi:10.1520/STP18535S

SYMPOSIA PAPER Published: 01 January 1988

STP18535S

CaF : An ESCA Study

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This paper describes two observations made on CaF₂ during electron spectroscopy for chemical analysis (ESCA) studies. The first observation is that an ion-etched CaF₂ surface adsorbs several layers of water even in an ultrahigh vacuum (UHV) chamber (P ∼ 2×10^-10 torr). This water at the sputter-etched surface is responsible for the presence of oxygen peaks in the ESCA data. The presence of oxygen in the ESCA data can easily be misinterpreted as an impurity in the CaF₂ bulk. This observation is detailed in Part I of the paper.

The second observation is that CaF₂ (whether substrate, source material or coating) in a UHV environment releases a small amount of fluorine-containing gas. This is discussed in Part II of the paper.

Author Information

Raj, T

Law, M

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Details

Developed by Committee: E13

Pages: 50–54

DOI: 10.1520/STP18535S

ISBN-EB: 978-0-8031-5032-4

ISBN-13: 978-0-8031-4477-4

CaF : An ESCA Study

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