Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Optical fiber – waveguide – or preform
Reexamination Certificate
2004-03-10
2008-10-21
Huson, Monica A (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Optical fiber, waveguide, or preform
C264S497000, C264S494000
Reexamination Certificate
active
07438838
ABSTRACT:
The invention relates to a method for producing a polymeric optical waveguide-forming master plate, comprising: laying a thread which does not transmit rays used for subsequent exposure on a substrate for a master plate, applying a positive resist material onto the substrate to have a thickness such that, when parallel rays are vertically radiated onto the resist from a side opposite to a substrate side with respect to the thread and then the resist is developed, a layer made of the resist is formed at whole space where the rays have not been radiated; radiating parallel rays substantially vertically to the substrate to expose the resist to the rays; and developing the exposed resist on the substrate to form a convex portion corresponding to a shape of an optical waveguide core, to waveguide production methods using the same, and to the resultant waveguide.
REFERENCES:
patent: 5138687 (1992-08-01), Horie et al.
patent: 6355198 (2002-03-01), Kim et al.
patent: A-03-012612 (1991-01-01), None
patent: A 10-253845 (1998-09-01), None
patent: B2 3151364 (2001-01-01), None
Akutsu Eiichi
Ohtsu Shigemi
Shimizu Keishi
Yatsuda Kazutoshi
Fuji 'Xerox Co., Ltd.
Huson Monica A
Oliff & Berridg,e PLC
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