US3787212A
Expired / Lapsed
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Polymeric photosensitive compositions and methods using same
Assignee: Monsanto Co
•
Filing: 1972-08-04
•
Granted: 1974-01-22
•
Expires: 1992-08-04
Abstract
Abstract Photosensitive compositions of solid, solvent-soluble acrylonitrile/diene interpolymers with activated aromatic ketone sensitizers, e.g. polynuclear quinones, and applications as photoresists.
Inventors
- 👤 R Heimsch
- 👤 J Bartosczewicz
- 👤 R Slocombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:12
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0388; G03F7/027; G03F7/028; G03F7/031; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12; Y10S430/122; Y10S430/124
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
42 words
The element of claim 1 in which the polymer has 32 to 60 parts by weight of alkenyl nitrile units per 68 to 40 parts by weight units from hydrocarbon diene and the said layer contains no other polymeric or polymerizable units.
Claim 2
Dependent Claim
12 words
The element of claim 2 in which the alkenyl nitrile is acrylonitrile.
Claim 3
Dependent Claim
20 words
The element of claim 3 in which the hydrocarbon diene is selected from the group consisting of isoprene and butadiene.
Claim 4
Dependent Claim
12 words
The element of claim 3 in which the hydrocarbon diene is isoprene.
Claim 5
Dependent Claim
13 words
The element of claim 2 in which the photosensitizer is a polynuclear quinone.
Claim 6
Dependent Claim
12 words
The element of claim 2 in which the photosensitizer is a thioxanthenone.
Claim 7
Dependent Claim
13 words
The element of claim 4 in which the photosensitizer is 2-chlorothioxanthone and benzophenone.
Claim 8
Dependent Claim
11 words
The element of claim 4 in which the photosensitizer is benzanthraquinone.
Claim 9
Dependent Claim
38 words
The element of claim 4 in which the interpolymer has 40 to 50 parts by weight units from acrylonitrile to 60 to 50 parts by weight units from butadiene or isoprene and the layer is relatively difficultly soluble.
Claim 10
Dependent Claim
22 words
The element of claim 1 in which the polymer has 40 to 60 parts acrylonitrile, 1-12 parts methacrylonitrile, and 40-50 parts isoprene.
Claim 11
Dependent Claim
16 words
A photosensitive composition comprising an interpolymer of an alkenylnitrile and a hydrocarbon diene and a chlorothioxanthone.
Claim 12
Dependent Claim
11 words
The composition of claim 12 in which benzophenone is also present.
Claim 13
Dependent Claim
11 words
The composition of claim 12 in which furil is also present.
Claim 14
Dependent Claim
11 words
The element of claim 12 in which xanthen-9-one is also present.
Claim 15
Dependent Claim
11 words
The element of claim 12 in which 9-fluorenone is also present.
Claim 16
Dependent Claim
11 words
The element of claim 12 in which benzil is also present.
Claim 17
Dependent Claim
35 words
The composition of claim 12 in which the interpolymer is of acrylonitrile and isoprene and has 32 to 60 parts by weight of acrylonitrile units to 68 to 40 parts by weight of isoprene units.
Claim 18
Dependent Claim
33 words
The composition of claim 12 in which the interpolymer is of acrylonitrile and butadiene and has 32 to 60 parts by weight of acrylonitrile units to 68 to 40 parts of butadiene units.
Claim 19
Dependent Claim
59 words
A photosensitive composition consisting essentially of an interpolymer of acrylonitrile and a hydrocarbon diene selected from the group consisting of isoprene and butadiene, and 5 to 15 percent by weight of the interpolymer of benzanthraquinone, the interpolymer having 32 to 60 parts by weight of acrylonitrile units to 68 to 40 parts by weight of units from hydrocarbon diene.
Claim 20
Dependent Claim
67 words
A photosensitive coating composition consisting essentially of a solid, non-tacky solvent-soluble interpolymer of an alkenyl nitrile and a hydrocarbon diene, and a photosensitizer which is an aromatic polynuClear compound having at least one intracyclic carbonyl group and another intracyclic group selected from the group consisting of sulfur, carbonyl and aza groups and a solvent selected from the group consisting of aliphatic ketone solvents and aliphatic ester solvents.
Claim 21
Dependent Claim
74 words
The coating composition of claim 21 in which the interpolymer is an interpolymer of acrylonitrile and isoprene with 40 to 50 parts by weight acrylonitrile units to 50 to 40 parts by weight isoprene units, and the photosensitizer is selected from the group consisting of polynuclear quinones and thioxanthones, and the interpolymer comprises 5 to 20 percent by weight of the composition and the photosensitizer 5 to 15 percent by weight of the interpolymer.
Claim 22
Dependent Claim
17 words
The coating composition of claim 21 in which chlorothioxanthone is the photosensitizer and benzophenone is also present.
Claim 23
Dependent Claim
52 words
A photosensitive composition consisting essentially of an interpolymer selected from the group consisting of acrylonitrile isoprene interpolymers and acrylonitrile butadiene interpolymers and at least 5 percent by weight on the interpolymer of a photosensitizer, in which a compound selected from the group consisting of polynuclear quinones and thioxanthones is used as photosensitizer.
Claim 24
Dependent Claim
64 words
A relatively difficultly soluble photosensitive composition consisting essentially of acrylonitrile/diene interpolymer selected from the group consisting of acrylonitrile/isoprene interpolymers and acrylonitrile/butadiene interpolymers with a weight content of 40 to 50 parts by weight acrylonitrile units to 60 to 50 parts by weight diene units, and at least 5 percent by weight of a photosensitizer selected from the group consisting of polynuclear quinones and thioxanthones.
Claim 25
Dependent Claim
32 words
The composition of claim 25 in which the polymer is 42 to 47 parts by weight acrylonitrile, 40 to 45 parts by weight isoprene and 8 to 12 parts by weight methacrylonitrile.
Claim 26
Dependent Claim
60 words
The method of photoimaging comprising a. applying to a surface of a support a coating layer to form a light sensitive element as defined in claim 1, b. placing a mask in cooperative relationship with respect to such coating layer, and c. exposing said mask to actinic light, thereby changing the solubility characteristics of exposed portions of said coating layer.
Claim 27
Dependent Claim
23 words
The method of claim 27 in which unexposed portions of said coating layer are then removed from said surface by a development solvent.
Claim 28
Dependent Claim
40 words
The method of claim 28 in which the exposure time is no more than 2 minutes with a 400 watt mercury vapor lamp at 17 inches, and the removal is by a development solvent in no more than 5 minutes.
Claim 29
Dependent Claim
47 words
The method of claim 28 in which the unexposed surfaces are removed by use of trichloroethylene solvent and the interpolymer in the light sensitive element has 40 to 50 parts by weight units for acrylonitrile and 60 to 50 parts by weight units from butadiene or isoprene.
Claim 30
Dependent Claim
32 words
The method of claim 28 in which the support has a metal surface and after the removal of the unexposed portions the resulting uncovered portions are etched away to the degree desired.
Claim 31
Dependent Claim
50 words
The method of claim 28 in which a printed circuit board is made by photoimaging a support which has a copper surface and the copper is etched away with ferric chloride solution to leave unetched portions of copper as a circuit, and removing the remaining portion of the coating layer.
Claim 32
Dependent Claim
17 words
The method of claim 28 in which the coating is applied to the surface in liquid form.
Claim 33
Dependent Claim
18 words
The method of claim 28 in which the coating layer is applied by lamination as a solid film.
Claim 34
Dependent Claim
14 words
The method of claim 28 in which the resulting image comprises a printing plate.
Claim 35
Dependent Claim
19 words
The method of claim 28 in which the coating layer consists essentially of the components defined in claim 1.
Claim 36
Dependent Claim
57 words
A photosensitive coating composition comprising a solid, non-tacky solVent-soluble interpolymer of an alkenyl nitrile and a hydrocarbon diene, and a photosensitizer which is an aromatic poly-nuclear compound having at least one intracyclic carbonyl group and another intracyclic group selected from the group consisting of sulfur, carbonyl and aza groups and characterized by the absence of polymerizable monomers.
References Cited (Backward Citations)
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Cited
US3169868A
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US3380831A
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US3427161A
Cited
US3551160A
Cited
US3537853A
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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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |