US4749245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film waveguide device and manufacturing method for making same
Assignee: Kuraray Co Ltd
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Filing: 1986-03-06
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Granted: 1988-06-07
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Expires: 2006-03-06
Abstract
Abstract A thin film waveguide path comprises a waveguide path layer overlying a substrate but separated therefrom by at least one intermediate layer. The waveguide path layer comprises a first transparent high molecular material. The at least one intermediate layer comprises a second organic high molecular material having a solubility different from that of the first material and a lower refractive index lower than that of the first material, the substrate comprises a third high molecular material different from the first and second materials for supporting the waveguide path and intermediate layers.
Inventors
- 👤 Nobuhiko Kawatsuki
- 👤 Masao Uetsuki
- 👤 Junji Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:23
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
103 words
A thin film waveguide path comprising: a waveguide path layer comprising a transparent, first organic high molecular material; at least one intermediate layer comprising a second organic high molecular material which has a solvent solubility different from that of said first high molecular material and a refractive index lower than that of said first high molecular material; and a substrate comprising a third organic high molecular material different from that of said second high molecular material for supporting said waveguide path layer and said intermediate layer; said waveguide path layer overlying said one intermediate layer and said one intermediate layer overlying said substrate.
Claim 2
Dependent Claim
103 words
A thin film waveguide path comprising: a waveguide path layer comprising a transparent, first organic high molecular material; at least one intermediate layer comprising a second organic high molecular material which has a solvent solubility different from that of said first high molecular material and a refractive index lower than that of said first high molecular material; and a substrate comprising a third organic high molecular material different from that of said second high molecular material for supporting said waveguide path layer and said intermediate layer; said waveguide path layer overlying said one intermediate layer and said one intermediate layer overlying said substrate.
Claim 3
Dependent Claim
32 words
A waveguide path according to claim 1, wherein said first and second organic high molecular materials exhibit a difference in solubility of not less than 2.0×10 -3 (J/m 3 ) 1/2 .
Claim 4
Dependent Claim
33 words
A waveguide path according to claim 1, wherein said intermediate layer has a laminated construction comprising layers for providing a smoother surface than a surface of said substrate overlain by said intermediate layer.
Claim 5
Dependent Claim
30 words
A waveguide path according to claim 1, wherein said first high molecular material is selected from a group consisting of acrylate series resin, polycarbonate, polystyrene series polymer, polysulfon and polyurethane.
Claim 6
Dependent Claim
31 words
A waveguide path according to claim 1, wherein said second intermediate material is one selected from a group consisting of cellulose acetate, nitrocellulose, polyvinyl alcohol, polyurethane, epoxy resin, and poly(fluoroalkyl methacrylate).
Claim 7
Dependent Claim
30 words
A waveguide path according to claim 1, wherein the said third high molecular material is selected from a group consisting of polymethyl methacrylate, polycarbonate polyester, nylon, polyethylene, polysulfone and polystyrene.
Claim 8
Independent Claim
149 words
A method for manufacturing a thin film waveguide path including a substrate, an intermediate layer, and a waveguide layer laminated in the foregoing order, the method comprising the steps of: providing a substrate comprising a first organic high molecular material and having sufficient thickness and strength to be self-supporting; forming an intermediate layer atop said substrate by applying and drying a solution of a second high molecular material on said substrate, said second material being different than said first high molecular material; and forming a waveguide layer atop said intermediate layer by applying and drying a solution of a transparent third high molecular material having a refractive index higher than that of said second high molecular material and having a solvent solubility different from that of said second material so that said second material does not substantially dissolve in response to a solvent used to dissolve said third material.
Claim 9
Independent Claim
149 words
A method for manufacturing a thin film waveguide path including a substrate, an intermediate layer, and a waveguide layer laminated in the foregoing order, the method comprising the steps of: providing a substrate comprising a first organic high molecular material and having sufficient thickness and strength to be self-supporting; forming an intermediate layer atop said substrate by applying and drying a solution of a second high molecular material on said substrate, said second material being different than said first high molecular material; and forming a waveguide layer atop said intermediate layer by applying and drying a solution of a transparent third high molecular material having a refractive index higher than that of said second high molecular material and having a solvent solubility different from that of said second material so that said second material does not substantially dissolve in response to a solvent used to dissolve said third material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |