Planar optical waveguide assembly and method of preparing same

Details Planar optical waveguide assembly and method of preparing same Planar optical waveguide assembly and method of preparing same

2005-06-14

2005-06-14

Fourson, George (Department: 2823)

Semiconductor device manufacturing: process

Making device or circuit emissive of nonelectrical signal

Including integrally formed optical element

C385S014000, C385S130000, C385S143000

Reexamination Certificate

active

06905904

ABSTRACT:
A method of preparing a planar optical waveguide assembly, comprising the steps of (i) applying a curable polymer composition to a surface of a substrate to form a polymer film; (ii) curing the polymer film to form a lower clad layer; (iii) applying a silicone composition to the lower clad layer to form a silicone film; (iv) exposing at least one selected region of the silicone film to radiation having a wavelength of from 150 to 800 nm to produce a partially exposed film having at least one exposed region and at least one non-exposed region; (v) removing the non-exposed region of the partially exposed film with a developing solvent to form a patterned film; and (vi) heating the patterned film for an amount of time sufficient to form at least one silicone core having a refractive index of from 1.3 to 1.7 at 23° C. for light having a wavelength of 589 nm; wherein the lower clad layer has a refractive index less than the refractive index of the silicone core. A planar optical waveguide assembly prepared according to the method of the invention.

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Pending patent application, “Semiconductor Package and Method of Preparing Same,” Becker et. al., Dow Corning Corporation, Application No. 789083, Application date Feb. 20, 2002.

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