Patent US4743531A successfully refreshed from Google Patents.
US4743531A
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Dye sensitized photographic imaging system
Assignee: Eastman Kodak Co
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Filing: 1986-11-21
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Granted: 1988-05-10
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Expires: 2006-11-21
Abstract
Abstract A photographic imaging system is disclosed comprised of an imaging dye or a precursor thereof, a hardenable organic component containing ethylenic unsaturation sites and capable of imagewise modulating mobility of the dye or dye precursor as a function of addition at the sites of ethylenic unsaturation, and coinitiators for ethylenic addition. The coinitiators include an azinium salt activator and a photosensitizer which is a dye exhibiting a reduction potential which in relation to that of said ionized azinium salt activator is at most 0.1 volt more positive, with the further proviso that, when the photosensitizer is a keto dye having its principal absorption peak at a wavelength shorter than 550 nm, it exhibits when excited by imaging radiation an intersystem crossing efficiency to a triplet state of less than 10 percent.
Inventors
- 👤 Samir Y. Farid
- 👤 Neil F. Haley
- 👤 Roger E. Moody
- 👤 Donald P. Specht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:05
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; G03F7/002; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12; Y10S430/121
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
168 words
A photographic imaging system consisting essentially of an imaging dye or precursor thereof, a hardenable organic component chosen from the class consisting of monomers, oligomers, and polymers each containing ethylenic unsaturation and capable of selective immobilization by addition at the sites of ethylenic unsaturation and coinitiators for ethylenic addition comprised of an effective amount of a quaternized azinium salt activator and a concentration sufficient to increase response of the photoresist to light of a photosensitizer which is a dye exhibiting a reduction potential which in relation to that of said azinium salt activator is at most 0.1 volt more positive, with the further proviso that, when said photosensitizer is a keto dye having its principal absorption peak at a wavelength shorter than 550 nm, it exhibits when excited by imaging radiation an intersystem crossing efficiency to a triplet state of less than 10 percent, said photosensitizer being chosen to exhibit a maximum absorption peak in a different portion of the spectrum than said imaging dye or its precursor.
Claim 2
Dependent Claim
168 words
A photographic imaging system consisting essentially of an imaging dye or precursor thereof, a hardenable organic component chosen from the class consisting of monomers, oligomers, and polymers each containing ethylenic unsaturation and capable of selective immobilization by addition at the sites of ethylenic unsaturation and coinitiators for ethylenic addition comprised of an effective amount of a quaternized azinium salt activator and a concentration sufficient to increase response of the photoresist to light of a photosensitizer which is a dye exhibiting a reduction potential which in relation to that of said azinium salt activator is at most 0.1 volt more positive, with the further proviso that, when said photosensitizer is a keto dye having its principal absorption peak at a wavelength shorter than 550 nm, it exhibits when excited by imaging radiation an intersystem crossing efficiency to a triplet state of less than 10 percent, said photosensitizer being chosen to exhibit a maximum absorption peak in a different portion of the spectrum than said imaging dye or its precursor.
Claim 3
Dependent Claim
35 words
A photographic imaging system according to claim 1 in which said hardenable organic component is comprised of at least one addition polymerizable ethylenically unsaturated compound having a boiling point above 100° C. at normal pressure.
Claim 4
Dependent Claim
18 words
A photographic imaging system according to claim 2 in which said polymerizable ethylenically unsaturated compound is a monomer.
Claim 5
Dependent Claim
18 words
A photographic imaging system according to claim 2 in which said polymerizable ethylenically unsaturated compound is an oligomer.
Claim 6
Dependent Claim
19 words
A photographic imaging system according to claim 2 in which said polymerizable ethylenically unsaturated compound is a crosslinkable polymer.
Claim 7
Dependent Claim
137 words
A photographic imaging system consisting essentially of an imaging dye or precursor thereof, a hardenable organic component chosen from the class consisting of monomers, oligomers, and polymers each containing ethylenic unsaturation and capable of selective immobilization by addition at the sites of ethylenic unsaturation and coinitiators for ethylenic addition comprised of an effective amount of a quaternized azinium salt activator and a concentration sufficient to increase response of the photoresist to light of a photosensitizer which is a dye having its principal absorption peak at a wavelength longer than 550 nm and exhibiting a reduction potential which in relation to that of said azinium salt activator is at most 0.1 volt more positive, said photosensitizer being chosen to exhibit a maximum absorption peak in a different portion of the spectrum than said imaging dye or its precursor.
Claim 8
Dependent Claim
137 words
A photographic imaging system consisting essentially of an imaging dye or precursor thereof, a hardenable organic component chosen from the class consisting of monomers, oligomers, and polymers each containing ethylenic unsaturation and capable of selective immobilization by addition at the sites of ethylenic unsaturation and coinitiators for ethylenic addition comprised of an effective amount of a quaternized azinium salt activator and a concentration sufficient to increase response of the photoresist to light of a photosensitizer which is a dye having its principal absorption peak at a wavelength longer than 550 nm and exhibiting a reduction potential which in relation to that of said azinium salt activator is at most 0.1 volt more positive, said photosensitizer being chosen to exhibit a maximum absorption peak in a different portion of the spectrum than said imaging dye or its precursor.
Claim 9
Dependent Claim
28 words
A photographic imaging system according to claim 1 in which said photosensitizer exhibits a reduction potential that is more negative than the reduction potential of said azinium activator.
Claim 10
Dependent Claim
21 words
A photographic imaging system according to claim 1 in which said photosensitizer is a rhodamine, anthracene, azo, aniline, or acridine dye.
Claim 11
Dependent Claim
16 words
A photographic imaging system according to claim 1 in which said photosensitizer is a polymethine dye.
Claim 12
Dependent Claim
23 words
A photographic imaging system according to claim 9 in which said photosensitizer is a cyanine, merocyanine, oxonol, hemioxonol, styryl, merostyryl, or streptocyanine dye.
Claim 13
Dependent Claim
30 words
A photographic imaging system according to claim 1 in which said photosensitizer is a dye which exhibits an intersystem crossing efficiency to a triplet state of less than 10 percent.
Claim 14
Dependent Claim
17 words
A photographic imaging system according to claim 1 in which said photosensitizer is a subtractive primary dye.
Claim 15
Dependent Claim
20 words
A photographic imaging system according to claim 2 in which said imaging dye is an additive or subtractive primary dye.
Claim 16
Dependent Claim
151 words
A photographic imaging system consisting essentially of a precursor of an imaging dye, a hardenable organic component chosen from the class consisting of monomers, oligomers, and polymers each containing ethylenic unsaturation and capable of selective immobilization by addition at the sites of ethylenic unsaturation and coinitiators for ethylenic addition comprised of an effective amount of a quaternized azinium salt activator free of a dye chromophore and stable in unfiltered room light and a concentration sufficient to increase response of the imaging composition to light of a photosensitizer which is a dye, said photosensitizer having its principal absorption peak at a wavelength longer than 550 nm and exhibiting a reduction potential which in relation to that of said azinium salt activator is at most 0.1 volt more positive, said photosensitizer being chosen to exhibit a maximum absorption peak in a different portion of the spectrum than said imaging dye or its precursor.
Claim 17
Dependent Claim
151 words
A photographic imaging system consisting essentially of a precursor of an imaging dye, a hardenable organic component chosen from the class consisting of monomers, oligomers, and polymers each containing ethylenic unsaturation and capable of selective immobilization by addition at the sites of ethylenic unsaturation and coinitiators for ethylenic addition comprised of an effective amount of a quaternized azinium salt activator free of a dye chromophore and stable in unfiltered room light and a concentration sufficient to increase response of the imaging composition to light of a photosensitizer which is a dye, said photosensitizer having its principal absorption peak at a wavelength longer than 550 nm and exhibiting a reduction potential which in relation to that of said azinium salt activator is at most 0.1 volt more positive, said photosensitizer being chosen to exhibit a maximum absorption peak in a different portion of the spectrum than said imaging dye or its precursor.
Claim 18
Dependent Claim
29 words
A photographic imaging system according to claim 1 wherein said photosensitizer is present in a concentration ranging from 5×10 -7 to 1×10 -4 mole per gram of dry solids.
Claim 19
Dependent Claim
29 words
A photographic imaging system according to claim 14 where said activator is present in a concentration of from 2×10 -5 to 25×10 -5 mole per gram of dry solids.
Claim 20
Dependent Claim
26 words
A photographic imaging system according to claim 1 wherein said azinium salt activator is free of a dye chromophore and is stable in unfiltered room light.
Claim 21
Dependent Claim
26 words
A photographic imaging system according to claim 1 wherein said photosensitizer is a dye having its principal absorption peak in the visible portion of the spectrum.
Claim 22
Dependent Claim
15 words
A photographic imaging system according to claim 18 wherein said photosensitizer is a magenta dye.
Claim 23
Dependent Claim
15 words
A photographic imaging system according to claim 18 wherein said photosensitizer is a cyan dye.
Claim 24
Dependent Claim
17 words
A photographic imaging system according to claim 14 wherein said imaging dye precursor is a leuco dye.
Claim 25
Dependent Claim
24 words
A photographic imaging system according to claim 14 wherein said imaging dye precursor is a triarylmethane, bisphenylmethane, xanthene, thiazine, spiropyran, or phthalocyanine chromogenic material.
Claim 26
Dependent Claim
18 words
A photographic imaging system according to claim 1 wherein said imaging dye is an azo or anthracene dye.
Claim 27
Dependent Claim
21 words
A photographic imaging system according to claim 1 wherein said imaging dye exhibits a shorter wavelength absorption peak than said photosensitizer.
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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) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |