US4629685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for irradiating polyimides
Assignee: Olin Microelectronic Chemicals Inc
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Filing: 1985-11-06
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Granted: 1986-12-16
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Expires: 2005-11-06
Abstract
Abstract Homopolyimides and copolyimides which contain structural elements of the formula I ##STR1## in which R 1 and R 2 are halogen, nitro, aryl, aryloxy, alkyl or alkoxy, m is 0 or a number from 1 to 4, n is 0 or a number from 1 to 3 and p is 0, 1 or 2, the free carbonyl groups are bonded in the ortho-position relative to one another and R is a divalent aromatic radical which is substituted by at least one alkyl group or aralkyl group, are autophotocross-linkable. They are suitable for the production of protective films and photographic relief images.
Inventors
- 👤 Josef Pfeifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:59
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0387; C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1003; C08G73/1057; C08G73/1067; C08G73/1075; C08G73/1082; C08G73/1085; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/107; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
169 words
A process for the production of a protective film or photographic relief image which comprises irradiating a coated material, directly or through a photo-mask, said coated material being a layer of a polyimide applied to the surface of a carrier material, the polyimide being a homopolyimide or copolyimide which contains structural elements of aromatic aminodicarboxylic acids and has an intrinsic viscosity of at least 0.1 dl/g, measured at 25° C. in a solution of 0.5% by weight of polyimide in N-methylpyrrolidone, which contains recurring structural elements of the formula I ##STR43## in which R 1 and R 2 are halogen, nitro, aryl, aryloxy, alkyl or alkoxy, m is 0 or a number from 1 to 4, n is 0 or a number from 1 to 3 and p is 0, 1 or 2, the free carbonyl groups are bonded in the ortho-position relative to one another and R is a divalent aromatic radical which is substituted by at least one alkyl group or aralkyl group, and developing the material.
Claim 2
Dependent Claim
169 words
A process for the production of a protective film or photographic relief image which comprises irradiating a coated material, directly or through a photo-mask, said coated material being a layer of a polyimide applied to the surface of a carrier material, the polyimide being a homopolyimide or copolyimide which contains structural elements of aromatic aminodicarboxylic acids and has an intrinsic viscosity of at least 0.1 dl/g, measured at 25° C. in a solution of 0.5% by weight of polyimide in N-methylpyrrolidone, which contains recurring structural elements of the formula I ##STR43## in which R 1 and R 2 are halogen, nitro, aryl, aryloxy, alkyl or alkoxy, m is 0 or a number from 1 to 4, n is 0 or a number from 1 to 3 and p is 0, 1 or 2, the free carbonyl groups are bonded in the ortho-position relative to one another and R is a divalent aromatic radical which is substituted by at least one alkyl group or aralkyl group, and developing the material.
Claim 3
Dependent Claim
19 words
A process according to claim 1 where in the polyimide of formula I; m, n and p are 0.
Claim 4
Dependent Claim
24 words
A process according to claim 1 where in the polyimide of formula I the carbonyl groups are bonded in the 2-, 3- and 6-positions.
Claim 5
Dependent Claim
34 words
A process according to claim 1 where in the polyimide of formula I the aromatic radical R is substituted by an alkyl or aralkyl group in at least one ortho-position relative to the N-atom.
Claim 6
Dependent Claim
27 words
A process according to claim 1 where in the polyimide of formula I the divalent aromatic R is substituted by benzyl or C 1 -C 12 -alkyl.
Claim 7
Dependent Claim
20 words
A process according to claim 5 wherein the divalent aromatic radical R is substituted by C 1 -C 12 -alkyl.
Claim 8
Dependent Claim
14 words
A process according to claim 6 wherein the alkyl is methyl, ethyl or isopropyl.
Claim 9
Dependent Claim
26 words
A process according to claim 1 where in the polyimide of formula I the aromatic radical R is a phenylene or bisphenylene radical substituted by alkyl.
Claim 10
Dependent Claim
75 words
A process according to claim 8 wherein the radical R has the formula II ##STR44## in which q is 0 or 1, R 3 is a direct bond or a bridge group, R 4 is alkyl with 1 to 4 C atoms and R 5 and R 11 are hydrogen atoms or alkyl with 1 to 4 C atoms, and the free bonds are in the meta- or para-position relative to the R 3 group.
Claim 11
Dependent Claim
33 words
A process according to claim 9 wherein R 3 is a direct bond or, as a bridge member, --S--, --SO--, --SO 2 --,--CO--, --CH 2 --, --O-- or C 2 -C 6 -alkylidene.
Claim 12
Dependent Claim
16 words
A process according to claim 1 where the polyimide contains structural elements of the formula ##STR45##
Claim 13
Dependent Claim
95 words
A process according to claim 1 wherein the polyimide contains (a) 0.1-100 mol % of structural elements of the formula I and (b) 99.9-0 mol % of structural elements of the formula III and/or IIIa ##STR46## in which Z is the tetravalent radical of an aromatic tetracarboxylic acid onto which in each case two carbonyl groups are bonded in the ortho- or peri-position, Z' is the trivalent radical of an aromatic aminocarboxylic acid onto which two carbonyl groups are bonded in the ortho- or peri-position and X is the divalent radical of an organic diamine.
Claim 14
Dependent Claim
32 words
A process according to claim 12 where in the structural elements of formula III, Z has the formula ##STR47## in which the free bonds are in the ortho-position relative to one another.
Claim 15
Dependent Claim
43 words
A process according to claim 12 where in the structural elements of formula III, X is a divalent phenylene or bisphenylene radical which is substituted by C 1 -C 12 -alkyl in at least one ortho-position relative to at least one N atom.
Claim 16
Dependent Claim
45 words
A process according to claim 12 where in the structural elements of formula IIIa, Z' is a radical of the formula ##STR48## in which R 12 is a bridge group or a direct bond, two free bonds being in the ortho-position relative to one another.
Claim 17
Dependent Claim
21 words
A process according to claim 12 where in the structural elements of formula III, X is alkylene, cycloalkylene, aralkylene or arylene.
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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) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |