US3883351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a photoresist
Assignee: HECULES INCORPORATED A CORP OF DE
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Filing: 1974-03-25
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Granted: 1975-05-13
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Expires: 1994-03-25
Abstract
Abstract A photosensitive material and its use as a photoresist, the material comprising otherwise known photosensitive compositions dissolved in or dispersed in a binder which is a suitable vinyl compound such as a vinyl ester, ketone, or keto ester, suitable vinyl compounds being those which are soluble in alcohols or in azeotropes of alcohols and water.
Inventors
- 👤 James M Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:34
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; G03F7/033; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/108; Y10S430/11
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
23 words
THE PROCESS WHICH COMPRISES: PREPARING A SOLUTION OF A PHOTOSENSITIVE MATERIAL IN A SOLVENT, SAID PHOTOSENSITIVE MATERIAL CONSISTING ESSENTIALLY OF THE FOLLOWING MATERIALS;
Claim 2
Dependent Claim
23 words
THE PROCESS WHICH COMPRISES: PREPARING A SOLUTION OF A PHOTOSENSITIVE MATERIAL IN A SOLVENT, SAID PHOTOSENSITIVE MATERIAL CONSISTING ESSENTIALLY OF THE FOLLOWING MATERIALS;
Claim 3
Dependent Claim
6 words
AT LEAST ONE POLYMERIZABLE N-VINYL MONOMER;
Claim 4
Dependent Claim
6 words
AT LEAST ONE POLYMERIZABLE N-VINYL MONOMER;
Claim 5
Dependent Claim
89 words
AT LEAST ONE ACTIVATOR FOR ENCHANCING THE EFFECT OF EXPOSING SAID MONOMER TO A SUITABLE DOSE OF ELECTROMAGNETIC RADIATION AT LEAST SUFFICIENT TO INITIATE POLYMERIZATION OF SAID MONOMER, SAID ACTIVATOR BEING SELECTED FROM THE GROUP CONSISTING OF: ORGANIC HALOGEN COMPOUNDS IN WHICH AT LEAST THREE HALOGEN ATOMS FROM THE GROUPS CONSISTING OF CL, BR AND I ARE ATTACHED TO A SINGLE CARBON ATOM; SULFONYL CHLORIDES, SULFONYL BROMIDES, SULFENYL CHLORIDES, SULFENYL BROMIDES AND MERCAPTO COMPOUNDS WHEREIN THE MERCAPTO GROUP IS ATTACHED TO A CARBON ATOM IN A HETEROCYCLIC NUCLEUS; AND
Claim 6
Dependent Claim
89 words
AT LEAST ONE ACTIVATOR FOR ENCHANCING THE EFFECT OF EXPOSING SAID MONOMER TO A SUITABLE DOSE OF ELECTROMAGNETIC RADIATION AT LEAST SUFFICIENT TO INITIATE POLYMERIZATION OF SAID MONOMER, SAID ACTIVATOR BEING SELECTED FROM THE GROUP CONSISTING OF: ORGANIC HALOGEN COMPOUNDS IN WHICH AT LEAST THREE HALOGEN ATOMS FROM THE GROUPS CONSISTING OF CL, BR AND I ARE ATTACHED TO A SINGLE CARBON ATOM; SULFONYL CHLORIDES, SULFONYL BROMIDES, SULFENYL CHLORIDES, SULFENYL BROMIDES AND MERCAPTO COMPOUNDS WHEREIN THE MERCAPTO GROUP IS ATTACHED TO A CARBON ATOM IN A HETEROCYCLIC NUCLEUS; AND
Claim 7
Dependent Claim
89 words
at least one activator for enhancing the effect of exposing said monomer to a suitable dose of electromagnetic radiation at least sufficient to initiate polymerization of said monomer, said activator being selected from the group consisting of: organic halogen compounds in which at least three halogen atoms from the groups consisting of Cl, Br and I are attached to a single carbon atom; sulfonyl chlorides, sulfonyl bromides, sulfenyl chlorides, sulfenyl bromides and mercapto compounds wherein the mercapto group is attached to a carbon atom in a heterocyclic nucleus; and
Claim 8
Dependent Claim
89 words
at least one activator for enhancing the effect of exposing said monomer to a suitable dose of electromagnetic radiation at least sufficient to initiate polymerization of said monomer, said activator being selected from the group consisting of: organic halogen compounds in which at least three halogen atoms from the groups consisting of Cl, Br and I are attached to a single carbon atom; sulfonyl chlorides, sulfonyl bromides, sulfenyl chlorides, sulfenyl bromides and mercapto compounds wherein the mercapto group is attached to a carbon atom in a heterocyclic nucleus; and
Claim 9
Dependent Claim
22 words
The process of claim 1 in which the development alcohol is selected from the group consisting of methyl, ethyl, and propyl alcohols.
Claim 10
Dependent Claim
18 words
The process of claim 1 including subsequent removal of the polymerized coating by use of a chorinated alkaline.
Claim 11
Dependent Claim
10 words
at least one substituted phenol represented by the general formula
Claim 12
Dependent Claim
10 words
at least one substituted phenol represented by the general formula
Claim 13
Dependent Claim
10 words
AT LEAST ONE SUBSTITUTED PHENOL REPRESENTED BY THE GENERAL FORMULA
Claim 14
Dependent Claim
10 words
AT LEAST ONE SUBSTITUTED PHENOL REPRESENTED BY THE GENERAL FORMULA
Claim 15
Dependent Claim
74 words
A RESIN WHICH EXHIBITS A GOOD DEGREE OF SOLUBILITY IN AN ALKANOL SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL AND PROPANOLS AND AT LEAST SOME SOLUBILITY IN THE AZEOTROPE OF SAID ALCHOLS AND WATER; COATING THE SOLUTION ONTO A SOLID SUBSTRATE; DRYING THE COATING; PHOTOGRAPHICALLY EXPOSING THE COATING TO SUITABLE RADIATION; HEATING TO COMPLETE POLYMERIZATION OF THE EXPOSED PORTIONS OF THE COATING; AND DEVELOPING THE RESULTING RESIST WITH AN ALCOHOL OR ALCOHOLWATER AZEOTROPE.
Claim 16
Dependent Claim
74 words
A RESIN WHICH EXHIBITS A GOOD DEGREE OF SOLUBILITY IN AN ALKANOL SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL AND PROPANOLS AND AT LEAST SOME SOLUBILITY IN THE AZEOTROPE OF SAID ALCHOLS AND WATER; COATING THE SOLUTION ONTO A SOLID SUBSTRATE; DRYING THE COATING; PHOTOGRAPHICALLY EXPOSING THE COATING TO SUITABLE RADIATION; HEATING TO COMPLETE POLYMERIZATION OF THE EXPOSED PORTIONS OF THE COATING; AND DEVELOPING THE RESULTING RESIST WITH AN ALCOHOL OR ALCOHOLWATER AZEOTROPE.
Claim 17
Dependent Claim
74 words
a resin which exhibits a good degree of solubility in an alkanol selected from the group consisting of methanol, ethanol and propanols and at least some solubility in the azeotrope of said alcohols and water; coating the solution onto a solid substrate; drying the coating; photographically exposing the coating to suitable radiation; heating to complete polymerization of the exposed portions of the coating; and developing the resulting resist with an alcohol or alcohol-water azeotrope.
Claim 18
Dependent Claim
74 words
a resin which exhibits a good degree of solubility in an alkanol selected from the group consisting of methanol, ethanol and propanols and at least some solubility in the azeotrope of said alcohols and water; coating the solution onto a solid substrate; drying the coating; photographically exposing the coating to suitable radiation; heating to complete polymerization of the exposed portions of the coating; and developing the resulting resist with an alcohol or alcohol-water azeotrope.
References Cited (Backward Citations)
US3157505A
Cited
US3279919A
Cited
US3275443A
Cited
US3512975A
Cited
US3458311A
Cited
US3510304A
Cited
US3674494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |