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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
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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

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