Appeal No. 94-3631
Application 07/883,513
Chadwick for such a teaching [brief, pages 8-10]. We find ourselves in agreement with
appellants.
The optical inspection of printed wiring boards in Chadwick is nothing like the imaging of
checks in Concannon. Chadwick teaches that the roughness and changes in the surface textures
of printed wiring boards give rise to a mottled appearance when such printed wiring boards are
illuminated by brightfield vertical illumination. It is precisely the roughness of the surface that
gives rise to this effect [column 2, lines 3-7]. Chadwick teaches that a quasi-Lambertian
illumination source reduces the effect of mottling caused by the roughness of surface textures. A
check to be imaged, however, has no uneven surface textures so that the type of mottling found in
Chadwick would never be a problem. There is no basis on this record to conclude that the artisan
would find any motivation to use the quasi-Lambertian illumination source of Chadwick for
illuminating checks. The examiner has simply combined the teachings of two different,
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