EP0194639A2
Expired / Lapsed
EP
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Thin film waveguide path and manufacturing method therefor
Assignee: Kuraray Co Ltd
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Filing: 1986-03-11
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Granted: —
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Expires: 2006-03-11
Abstract
Abstract A thin film waveguide path is composed of a waveguide path layer (1) of a first transparent high molecular material, at least one intermediate layer (2) of a second organic high molecular material having a solvent solubility different from that of the first material and a lower refractive index lower than that of said first material, and a substrate (3) of a third high molecular material different from the two first and second materials for supporting the waveguide path (1) and each intermediate layer (2).
Inventors
- 👤 Nobuhiro Kawatsuki
- 👤 Masao Uetsuki
- 👤 Junji Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 11:11
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/122; G02B6/1221; B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/28; B32B27/286; B32B27/30; B32B27/302; B32B27/308; B32B27/34; B32B27/36; B32B27/365; B32B27/38; B32B27/40; B32B7/00; B32B7/02; B32B7/023
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
1 . A thin film waveguide path comprising in combination: (A) a waveguide path layer (1) comprising a transparent organic high molecular material (a), (B) at least one intermediate layer (2) compfising an organic high molecular material (b) which has a solvent solubility different from that of the high molecular material - (a) of the waveguide path layer and a refractive index lower than that of said high molecular material (a); and (C) a substrate (3) comprising an organic high molecular material (c) different from that of the high molecular material (b) of the intermediate layer for supporting the waveguide path layer and the intermediate layer.
Claim 2
Dependent Claim
106 words
1 . A thin film waveguide path comprising in combination: (A) a waveguide path layer (1) comprising a transparent organic high molecular material (a), (B) at least one intermediate layer (2) compfising an organic high molecular material (b) which has a solvent solubility different from that of the high molecular material - (a) of the waveguide path layer and a refractive index lower than that of said high molecular material (a); and (C) a substrate (3) comprising an organic high molecular material (c) different from that of the high molecular material (b) of the intermediate layer for supporting the waveguide path layer and the intermediate layer.
Claim 3
Dependent Claim
53 words
A waveguide path according to claim 1, characterized in that the difference of solubility paramenters between the high molecular materials (a) of the waveguide path layer (1) and of the high molecular material (b) of the intermediate layer - (2) is not less than 2.0 x 10 -3 (J/m 3 ) 1/2 .
Claim 4
Dependent Claim
31 words
A waveguide path according to claims 1 or 2, characterized in that the intermediate layer has a laminated construction comprising layers (2a, 2b) for increasing adherence and for smoothing a surface.
Claim 5
Dependent Claim
42 words
A waveguide path according to claims 1, 2 or 3, characterized in that the high molecular material (a) of the waveguide path layer (1) is one selected from the group consisting of acrylate series resin, polycarbonate, polystyrene series polymer, polysulfon and polyurethane.
Claim 6
Dependent Claim
43 words
A waveguide path according to any of claims 1 to 4, characterized in that the high molecular material (b) of the intermediate layer (2) is one selected from the group consisting of cellulose acetate, nitrocellulose, polyvinyl alcohol, polyurethane, epoxy resin, and poly(fluoroalkyl methacrylate).
Claim 7
Dependent Claim
42 words
A waveguide path according to any of claims 1 to 5, characterized in that the organic high molecular material (c) of the substrate (3) . is one selected from the group consisting of polymethyl metacrylate, polycarbonate polyester, nylon, polyethylene, polysulfone and polystyrene.
Claim 8
Independent Claim
137 words
A method for manufacturing a thin film waveguide path according to any of claims 1 to 6, comprising the steps of: preparing an intermediate layer (2) by applying and drying a solution of high molecular material (b) on a substrate (3) comprising organic high molecular material (c) and having enough tickness and strength for support, the high molecular material (b) of the intermediate layer (2) having a solvent solubility different from that of the organic high molecular material (c) of the substrate (3); and preparing a waveguide layer (1) by applying and drying a solution of transparent organic high molecular material (a) which has a refractive index higher than that of said high molecular material (b) of the intermediate layer (2) and which is dissolved in a solvent which does not substantially dissolve said intermediate layer (2).
Claim 9
Dependent Claim
23 words
The method according to claim 8, characterized in that the intermediate layer (2) and/or the waveguide layer (1) are applied by spin coating.
References Cited (Backward Citations)
No citation records indexed.
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