US5837804A
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Polyimides and optical parts obtained by using the same
Assignee: Resonac Corp
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Filing: 1996-07-24
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Granted: 1998-11-17
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Expires: 2016-07-24
Abstract
Abstract Polyimides satisfying the requirements (a), (b) and (c) among the requirements described below, polyimides satisfying the requirements (b), (c) and (d), and polyimides satisfying the requirements (a), (b), (c) and (d) are excellent in transparency, isotropy and resistance to cracking (no crack is formed in the formation of a multilayer film, so that the multilayer formation is easy, namely, the polyimides are good in processability) and can give optical parts excellent in optical characteristics: (a) the difference between the refractive index in TE mode and that in TM mode is 0.02 or less, (b) the glass transition temperature (Tg) is 250° C or higher, (c) the optical transmission loss at a wavelength of 0.7 to 1.6 μm is 1 dB/cm or less, and (d) the fluorine content is 22.6% by weight or less.
Inventors
- 👤 Chiaki Yamagishi
- 👤 Nori Sasaki
- 👤 Shigeo Nara
- 👤 Hidetaka Sato
- 👤 Shigeru Hayashida
- 👤 Masato Taya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:58
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/122; G02B6/1221; C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/1064; C08G73/1067; C08G73/1071; G02B1/00; G02B1/04; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3616; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
73 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less. (b) a glass transition temperature (Tg) of 250° C. or higher, and (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm.
Claim 2
Dependent Claim
73 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less. (b) a glass transition temperature (Tg) of 250° C. or higher, and (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm.
Claim 3
Dependent Claim
62 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (b) a glass transition temperature (Tq) of 250° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight.
Claim 4
Dependent Claim
62 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (b) a glass transition temperature (Tq) of 250° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight.
Claim 5
Dependent Claim
81 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 250° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight.
Claim 6
Dependent Claim
81 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 250° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight.
Claim 7
Dependent Claim
14 words
An optical waveguide according to claim 3, wherein the core layer comprises the polyimide.
Claim 8
Dependent Claim
82 words
An optical waveguide comprising a core layer and a clad layer, in which the core layer comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 250° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight and a nonlinear optical material.
Claim 9
Dependent Claim
82 words
An optical waveguide comprising a core layer and a clad layer, in which the core layer comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 250° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight and a nonlinear optical material.
Claim 10
Dependent Claim
73 words
A process for using a polyimide which comprises using a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 250° C. or higher, and (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm as a core layer or a clad layer in an optical waveguide.
Claim 11
Dependent Claim
73 words
A process for using a polyimide which comprises using a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 250° C. or higher, and (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm as a core layer or a clad layer in an optical waveguide.
Claim 12
Dependent Claim
62 words
A process for using a polyimide which comprises using a polyimide having (a) a glass transition temperature (Tg) of 250° C. or higher, (b) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (c) a fluorine content of 0-22.6% by weight as a core layer or a clad layer in an optical waveguide.
Claim 13
Dependent Claim
62 words
A process for using a polyimide which comprises using a polyimide having (a) a glass transition temperature (Tg) of 250° C. or higher, (b) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (c) a fluorine content of 0-22.6% by weight as a core layer or a clad layer in an optical waveguide.
Claim 14
Dependent Claim
81 words
A process for using a polyimide which comprises using a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 250° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight as a core layer or a clad layer in an optical waveguide.
Claim 15
Dependent Claim
81 words
A process for using a polyimide which comprises using a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 250° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight as a core layer or a clad layer in an optical waveguide.
Claim 16
Dependent Claim
156 words
A process for using a polyimide which comprises using a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 250° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight, which contains repeating units represented by the formula (I): ##STR11## wherein R 1 is a tetravalent aromatic group, and R 2 is a group of the formula (II) or the formula (III) ##STR12## wherein X is a single bond, O, S, SO 2 , CH 2 , CO, CONHC(CH 3 ) 2 or or N(CH 6 H 5 ); and Y 1 through Y 12 are independently H, CH 3 , CN or NO 2 as a core layer or a clad layer in an optical waveguide.
Claim 17
Dependent Claim
156 words
A process for using a polyimide which comprises using a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 250° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight, which contains repeating units represented by the formula (I): ##STR11## wherein R 1 is a tetravalent aromatic group, and R 2 is a group of the formula (II) or the formula (III) ##STR12## wherein X is a single bond, O, S, SO 2 , CH 2 , CO, CONHC(CH 3 ) 2 or or N(CH 6 H 5 ); and Y 1 through Y 12 are independently H, CH 3 , CN or NO 2 as a core layer or a clad layer in an optical waveguide.
Claim 18
Dependent Claim
62 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, and (b) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm.
Claim 19
Dependent Claim
62 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, and (b) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm.
Claim 20
Dependent Claim
73 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 220° C. or higher, and (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm.
Claim 21
Dependent Claim
73 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 220° C. or higher, and (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm.
Claim 22
Dependent Claim
62 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a glass transition temperature (Tg) of 220° C. or higher, (b) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (c) a fluorine content of 0-22.6% by weight.
Claim 23
Dependent Claim
62 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a glass transition temperature (Tg) of 220° C. or higher, (b) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (c) a fluorine content of 0-22.6% by weight.
Claim 24
Dependent Claim
51 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (b) a fluorine content of 0-22.6% by weight.
Claim 25
Dependent Claim
51 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (b) a fluorine content of 0-22.6% by weight.
Claim 26
Dependent Claim
70 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (c) a fluorine content of 0-22.6% by weight.
Claim 27
Dependent Claim
70 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (c) a fluorine content of 0-22.6% by weight.
Claim 28
Dependent Claim
81 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0-22.6% or less, (b) a glass transition temperature (Tg) of 220° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight.
Claim 29
Dependent Claim
81 words
An optical waveguide comprising a core layer and a clad layer, in which one of the core and clad layers comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0-22.6% or less, (b) a glass transition temperature (Tg) of 220° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (d) a fluorine content of 0-22.6% by weight.
Claim 30
Dependent Claim
14 words
An optical waveguide according to claim 14, wherein the core layer comprises the polyimide.
Claim 31
Dependent Claim
14 words
An optical waveguide according to claim 15, wherein the core layer comprises the polyimide.
Claim 32
Dependent Claim
66 words
An optical waveguide comprising a core layer and a clad layer, in which the core layer comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (c) a fluorine content of 0-22.6% by weight.
Claim 33
Dependent Claim
66 words
An optical waveguide comprising a core layer and a clad layer, in which the core layer comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 1.6 μm, and (c) a fluorine content of 0-22.6% by weight.
Claim 34
Dependent Claim
82 words
An optical waveguide comprising a core layer and a clad layer, in which the core layer comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 220° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 16 μm, and (d) a fluorine content of 0-22.6% by weight and a nonlinear optical material.
Claim 35
Dependent Claim
82 words
An optical waveguide comprising a core layer and a clad layer, in which the core layer comprises a polyimide having (a) a difference between the refractive index in TE mode and that in TM mode of 0.02 or less, (b) a glass transition temperature (Tg) of 220° C. or higher, (c) an optical transmission loss of 1 dB/cm or less at a wavelength of 0.7 to 16 μm, and (d) a fluorine content of 0-22.6% by weight and a nonlinear optical material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2001-11-16 | 2002-05-18 | 2002-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-16 | 2006-05-18 | 2006-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-16 | 2010-05-18 | 2010-11-17 | $7700.00 | Window Closed / Lapsed |