Appeal No. 2005-2666
Application No. 09/496,634
To the extent that the claims require their anti-reflective
coating to have high, low and high refractive index layers, we
concur with the examiner that the combined teachings of Kuhlman
and Olson would have led one of ordinary skill in the art to
employ such a feature. As indicated supra, Kuhlman teaches a
touch screen comprising an anti-reflective coating having a
single indium-tin oxide (ITO) layer or multi-layers. See also
column 4, lines 37-57 and column 5, lines 5-18. In reference to
forming an anti-reflective coating on the plastic substrate of
the type discussed in Kuhlman, Olson teaches (column 21, line 45
to column 22, line 5):
One of the reasons for the versatility or
metal oxides in optically functional coatings is
that unlike other materials, they may be used to
deposit both reflective or antireflective coatings
depending on the configuration of the oxide
coating and its chemical composition. Thus, as
discussed in International Publication Document WO
96/31343 (Bright), when a single thin layer of
metal oxide, such as ITO, having a thickness of
about 50 Angstroms to about 3000 Angstroms is
deposited over a transparent plastic film, such as
polyester or polycarbonate, the amount of light
reflected by the polyester or polycarbonate
increase substantially. In this case the ITO film
acts as “reflective” coating. On the other hand,
when alternating layers of ITO and SiO or ITO and2
SiO with a combined thickness of about 502
Angstroms to about and 3000 Angstroms are
deposited over the polyester or polycarbonate
8
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
Last modified: November 3, 2007