Appeal 2006-2650
Application 10/011,886
provides improved recording and replay capability even after
exposure to high temperature and humidity.
Kojima
20) Kojima teaches that the addition of nitrogen in amounts of 1.6 to 3.1%
to GeTeSb recording media yields improvements in sensitivity (laser
power), the carrier to noise ratio (CNR) and acceptable margin of
error in erasure power. (P. 8, Table 3).
21) Kojima discloses an example wherein the recording layer contains
GeTe crystallites. (page 7, ll. 35-36) and is used at 2000 RPM
(-12.5mls, [0048])
22) Kojima discloses the use of an interface layer containing nitrides,
including silicon and aluminum nitrides, for preventing micro-
material flow occurring between the first light interference layer and
recording layer due to repeated recording and erasing. [0035]. The
thickness of the interface layer is preferably 5 to 30 nm, more
preferably 10 nm. [0035].
23) Kojima teaches the importance of optimizing nitrogen content in the
recording layer. [0029].
Zhou
24) Zhou discloses the use of oxygen in amounts of 0.01 to 3.5% in
SbGeTe recording layers. (Col. 2, ll. 21-30; Figs. 2-8).
25) Zhou teaches that the addition of oxygen increases crystallization
(erasure) speed. (Col. 3, ll. 36-38).
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