Appeal No. 96-0763 Page 9
Application No. 07/840,345
considerations, we conclude that glass substrates are
conventionally used in liquid crystal displays. Accordingly,
it would have been obvious to one of ordinary skill in the art
to have used an insulative glass substrate in the claimed
subject matter.
As to the utilization of metallic shielding layers, both
Yanagisawa and EPA’412 are directed to metallic shielding
layers in liquid crystal displays. We find that EPA’412
discloses the use of either optosetting black ink or a thin
metallic film. See column 4, line 53 to column 5, line 2.
Moreover, we find that EPA’412 discloses that the shielding
layer may be used in numerous alternative locations. It may be
adjacent to a conductive film or to a color filter. See column
5, lines 3 through 14, and column 6, lines 13 - 18. See also
Examples 6 and 7.
Based upon the above findings, we conclude that it would
have been obvious for one of ordinary skill in the art to
prepare appellants’ color filter by incorporating both the
glass substrate of either Yanagisawa or EPA’412 and the thin
metallic shielding layers of EPA’412 in place of the black
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