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US4082552A
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Process of optically printing highly conductive character utilizing a medium containing a halogenated hydrocarbon photoactivator and a tetrathiafulvalene or a related compound thereof
Assignee: International Business Machines Corp
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Filing: 1977-02-17
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Granted: 1978-04-04
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Expires: 1997-02-17
Abstract
Abstract A method of optically printing conductive characters using charge transfer compounds is provided. The method is characterized by depositing an organic π electron donor compound dissolved in a halogenated hydrocarbon (halocarbon) on a suitable substrate and selectively exposing the so coated substrate to actinic radiation to obtain a permanent, highly conductive, image.
Inventors
- 👤 Edward Martin Engler
- 👤 Frank Benjamin Kaufman
- 👤 Bruce Albert Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:13
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/56; G03C1/00; G03C1/675; G03G; G03G5/00; G03G5/02; G03G5/026; H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K3/00; H05K3/10; H05K3/105
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
153 words
A method of producing a highly conductive image comprising the steps of: (1) depositing an organic π-electron donor compound in a halocarbon on a substrate, said organic donor compond has the empirical formula C 6 H 4 X 4 R 1 R 2 R 3 R 4 and the structural formula ##STR7## where X is selected from the group consisting of O, S, Se and Te and R 1 , R 2 , R 3 , and R 4 is hydrogen, a halogen or an organic substituent selected from the group consisting of an alkyl group, CO 2 Me, phenyl groups, and fused cyclics and substituted fused cyclics selected from the group consisting of cyclopentene, cyclohexene, benzene, furan, thiophene, dihydrofuran and dihydrothiophene (2) exposing said layer of organic π-electron donor compound in said halocarbon to actinic radiation in a predetermined pattern, and (3) evaporating excess halocarbon solvent, thereby obtaining a highly conductive image.
Claim 2
Independent Claim
153 words
A method of producing a highly conductive image comprising the steps of: (1) depositing an organic π-electron donor compound in a halocarbon on a substrate, said organic donor compond has the empirical formula C 6 H 4 X 4 R 1 R 2 R 3 R 4 and the structural formula ##STR7## where X is selected from the group consisting of O, S, Se and Te and R 1 , R 2 , R 3 , and R 4 is hydrogen, a halogen or an organic substituent selected from the group consisting of an alkyl group, CO 2 Me, phenyl groups, and fused cyclics and substituted fused cyclics selected from the group consisting of cyclopentene, cyclohexene, benzene, furan, thiophene, dihydrofuran and dihydrothiophene (2) exposing said layer of organic π-electron donor compound in said halocarbon to actinic radiation in a predetermined pattern, and (3) evaporating excess halocarbon solvent, thereby obtaining a highly conductive image.
Claim 3
Dependent Claim
28 words
A method according to claim 1 wherein said halocarbon is selected from the group consisting of CF 4 , CCl 4 , CBr 4 and CI 4 .
Claim 4
Dependent Claim
29 words
A method according to claim 1 wherein said organic π-electron donor compound is present in the concentration of from about 10 -5 to 1 molar in said halocarbon solvent.
Claim 5
Dependent Claim
14 words
A method according to claim 1 wherein said organic π-electron donor compound is tetrathiafulvalene.
Claim 6
Dependent Claim
14 words
A method according to claim 1 wherein said organic π-electron donor compound is tetraselenafulvalene.
Claim 7
Dependent Claim
12 words
A method according to claim 1 wherein said organic compound is cis/trans-dimethyletrathiafulvalene.
Claim 8
Dependent Claim
14 words
A method according to claim 1 wherein said organic π-electron donor compound is cis/trans-diselenadithiafulvalene.
Claim 9
Dependent Claim
14 words
A method according to claim 1 wherein said organic π-electron donor compound is hexamethylenetetrathiafulvalene.
Claim 10
Dependent Claim
14 words
A method according to claim 1 wherein said organic π-electron donor compound is hexamethylenetetraselenafulvalene.
Claim 11
Dependent Claim
14 words
A method according to claim 1 wherein said organic π-electron donor compound is dimethyldiselenadithiafulvalene.
Claim 12
Dependent Claim
14 words
A method according to claim 1 wherein said organic π-electron donor compound is tetramethyltetrathiafulvalene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |