Patent US4036648A successfully refreshed from Google Patents.
US4036648A
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US
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Highly conductive printing medium containing a halogenated hydrocarbon photoactivator and a tetrathiafulvalene or a related compound thereof
Assignee: International Business Machines Corp
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Filing: 1975-06-30
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Granted: 1977-07-19
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Expires: 1995-06-30
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
2026-10-26 10:31
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
149 words
A highly conductive printing medium comprising a substrate having disposed thereon a layer of an organic π-electron donor compound dissolved in a halocarbon capable in a complex with said organic π-electron donor compound of generating a free radical upon exposure to actinic radiation said medium being sensitive to actinic radiation, said organic π-electron donor compound having the emperical formula C 6 H 4 X 4 R 1 R 2 R 3 R 4 and the structural formula, ##STR6## 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 an organic substituent, selected from the group consisting of hydrogen, an alkyl group, halogen, CO 2 Me, phenyl groups, substituted phenyl groups and fused cyclics and substituted fused cyclics selected from the groups consisting of cyclopentene, cyclohexene, benzene, furan, thiophene, dihydrofuran and dihydrothiophene.
Claim 2
Dependent Claim
149 words
A highly conductive printing medium comprising a substrate having disposed thereon a layer of an organic π-electron donor compound dissolved in a halocarbon capable in a complex with said organic π-electron donor compound of generating a free radical upon exposure to actinic radiation said medium being sensitive to actinic radiation, said organic π-electron donor compound having the emperical formula C 6 H 4 X 4 R 1 R 2 R 3 R 4 and the structural formula, ##STR6## 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 an organic substituent, selected from the group consisting of hydrogen, an alkyl group, halogen, CO 2 Me, phenyl groups, substituted phenyl groups and fused cyclics and substituted fused cyclics selected from the groups consisting of cyclopentene, cyclohexene, benzene, furan, thiophene, dihydrofuran and dihydrothiophene.
Claim 3
Dependent Claim
31 words
A highly conductive printing medium according to claim 1 wherein said halocarbon is selected from the group consisting of CCl 4 , CBr 4 , CI 4 and CF 4 .
Claim 4
Dependent Claim
17 words
A highly conductive printing medium according to claim 2 wherein said organic π-electron donor compound is tetrathiafulvalene.
Claim 5
Dependent Claim
17 words
A highly conductive printing medium according to claim 2 wherein said organic π-electron donor compound is tetraselenafulvalene.
Claim 6
Dependent Claim
17 words
A highly conductive printing medium according to claim 2 wherein said organic π-electron donor compound is cis/trans-dimethyltetrathiafulvalene.
Claim 7
Dependent Claim
17 words
A highly conductive printing medium according to claim 2 wherein said organic π-electron donor compound is cis/transdiselenadithiafulvalene.
Claim 8
Dependent Claim
17 words
A highly conductive printing medium according to claim 2 wherein said organic π-electron donor compound is hexamethylenetetrathiafulvalene.
Claim 9
Dependent Claim
17 words
A highly conductive printing medium according to claim 2 wherein said organic π-electron donor compound is hexamethylenetetraselenafulvalene.
Claim 10
Dependent Claim
17 words
A highly conductive printing medium according to claim 2 wherein said organic π-electron donor compound is dimethyldiselenadithiafulvalene.
Claim 11
Dependent Claim
17 words
A highly conductive printing medium according to claim 2 wherein said organic π-electron donor compound is tetramethylitetrathiafulvalene.
Claim 12
Dependent Claim
29 words
A highly conductive printing medium according to claim 2 wherein said organic π-electron donor compound is present in from about 10 - 5 to 1 molar in said halocarbon.
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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |