Ionization radiation imageable photopolymer compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorYing Wang
Life of this patent
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Abstract
This invention discloses compositions that can be polymerized/crosslinked imagewise upon exposure to ionization radiation such as x-ray, electron beam, ion beam, and gamma-ray. This invention also discloses methods of use for these compositions for microfabrication of ceramics, for stereolithography, and for x-ray, e-beam, and ion-beam lithography which can be used for photoresists.
Claims31
A composition, that can be polymerized/cross-linked imagewise by ionizing radiation, consisting essentially of:
- (A) from 10 to 90 weight percent of a reactive monomer having at least one amide functional group, said monomer selected from the group consisting of:
- 47
- where R1, R2, R3, R4, and R5 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- aliphatic groups with amide or acrylamide substituent, and aliphatic groups with R′O— substituent where R′ represents aliphatic group, CnH2n+1 and CnH2n−1 (n=1 to 20);
- 48
- where R1 and R2 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- and acetamide;
- 49
- where R1 and R2 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- and unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- 50
- where R1 and R2 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- and amino-substituted aliphatic groups, CnH2,+1 and CnH2n−1 (n=1 to 20);
- (B) from 10 to 90 weight percent of a multifunctional cross-linking agent, said cross-linking agent consists of a backbone having at least 2 functional groups, said backbone is selected from the group consisting of:
- (1) linear or branched aliphatic chains, —(CRH)n—, n=1-1000, where R represents an aliphatic group, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (2) ethylene glycol chains, —(CH2CH2O)n— where n=1-1000;
- (3) propylene glycol chains, —(CH(CH3)CH2O)n— where n=1-1000;
- (4) cyclohexyl;
- and
- (5) isocyanurate, C3N3O3;
- and
- wherein the functional groups are selected from the group consisting of:
- (a) acrylates,
- 51
- where R1, R2, and R3 are selected from the group consisting of hydrogen and aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (b) carboxylic acid, —COOH;
- (c) epoxides,
- 52
- where R1, R2, and R3 are selected from:
- hydrogen or aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- and
- (d) vinyls,
- 53
- where R1, R2, and R3 are selected from:
- hydrogen or aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- and
- (C) from 0.1 to 80 weight percent of an inorganic radiation sensitizer having a particle size in the range of 1 nanometer to 1000 nanometers, said radiation sensitizer is selected from the group consisting of VB-VIB semiconductors, VB-VIIB semiconductors, IIB-VIB semiconductors, IIB-VB semiconductors, IIIB-VB semiconductors, IIIB-VIB semiconductors, IB-VIB semiconductors, and IVB-VIIB semiconductors.
A composition, that can be polymerized/cross-linked imagewise by ionizing radiation, consisting essentially of:
- (A) from 10 to 90 weight percent of a reactive monomer having at least one amide functional group, said monomer selected from the group consisting of:
- 54
- where R1, R2, R3, R4, and R5 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- aliphatic groups with amide or acrylamide substituent, and aliphatic groups with R′O— substituent where R′ represents aliphatic group, CnH2n+1 and CnH2n−1 (n=1 to 20);
- 55
- where R1 and R2 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- and acetamide;
- 56
- where R1 and R2 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- and unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- 57
- where R1 and R2 are selected from the group consisting of:
- hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- and amino-substituted aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (B) from 10 to 90 weight percent of a multifunctional cross-linking agent, said cross-linking agent consists of a backbone having at least 2 functional groups, said backbone is selected from the group consisting of:
- (1) linear or branched aliphatic chains, —(CRH)n—, n=1-1000, where R represents an aliphatic group, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (2) ethylene glycol chains, —(CH2CH2O)n— where n=1-1000;
- (3) propylene glycol chains, —(CH(CH3)CH2O)n— where n=1-1000;
- (4) cyclohexyl;
- and
- (5) isocyanurate, C3N3O3;
- and
- wherein the functional groups are selected from the group consisting of:
- (a) acrylates,
- 58
- where R1, R2, and R3 are selected from the group consisting of hydrogen and aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (b) carboxylic acid, —COOH;
- (c) epoxides,
- 59
- where R1, R2, and R3 are selected from:
- hydrogen or aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- and
- (d) vinyls,
- 60
- where R1, R2, and R3 are selected from:
- hydrogen or aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (C) from 0.1 to 80 weight percent of an inorganic radiation sensitizer having a particle size in the range of 1 nanometer to 1000 nanometers, said radiation sensitizer is selected from the group consisting of VB-VIB semiconductors, VB-VIIB semiconductors, IIB-VIB semiconductors, IIB-VB semiconductors, IIIB-VB semiconductors, IIIB-VIB semiconductors, IB-VIB semiconductors, and IVB-VIIB semiconductors;
- and
- (D) 5 to 90 weight percent of a polymer binder.
A composition, that can be polymerized/cross-linked imagewise by ionizing radiation, consisting essentially of:
- (A) from 10 to 90 weight percent of a reactive monomer having at least one amide functional group, said monomer selected from the group consisting of:
- 61
- where R1, R2, R3, R4, and R5 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- aliphatic groups with amide or acrylamide substituent, and aliphatic groups with R′O— substituent where R′ represents aliphatic group, CnH2n+1 and CnH2n−1 (n=1 to 20);
- 62
- where R1 and R2 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- and acetamide;
- 63
- where R1 and R2 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- and unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- 64
- where R1 and R2 are selected from the group consisting of:
- hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- and amino-substituted aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (B) from 10 to 90 weight percent of a multifunctional cross-linking agent, said cross-linking agent consists of a backbone having at least 2 functional groups, said backbone is selected from the group consisting of:
- (1) linear or branched aliphatic chains, —(CRH)n—, n=1-1000, where R represents an aliphatic group, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (2) ethylene glycol chains, —(CH2CH2O)n— where n=1-1000;
- (3) propylene glycol chains, —(CH(CH3)CH2O)n— where n=1-1000;
- (4) cyclohexyl;
- and
- (5) isocyanurate, C3N3O3;
- and
- wherein the functional groups are selected from the group consisting of:
- (a) acrylates,
- 65
- where R1, R2, and R3 are selected from the group consisting of hydrogen and aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (b) carboxylic acid, —COOH;
- (c) epoxides,
- 66
- where R1, R2, and R3 are selected from:
- hydrogen or aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- and
- (d) vinyls,
- 67
- where R1, R2, and R3 are selected from:
- hydrogen or aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (C) from 0.1 to 80 weight percent of an inorganic radiation sensitizer having a particle size in the range of 1 nanometer to 1000 nanometers, said radiation sensitizer is selected from the group consisting of VB-VIB semiconductors, VB-VIIB semiconductors, IIB-VIB semiconductors, IIB-VB semiconductors, IIIB-VB semiconductors, IIIB-VIB semiconductors, IB-VIB semiconductors, and IVB-VIIB semiconductors;
- (D) 5 to 90 weight percent of a polymer binder;
- and
- (E) 5 to 90 weight percent of metallic particle or ceramic oxide fillers, said metallic filler is selected from group consisting of Al, Ti, V, Cu, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, In, and Sb;
- said oxide filler is selected from the group consisting of Al, Ti, V, Cu, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, In, Sb, Ta, W, and Si.
A composition, that can be polymerized/cross-linked imagewise by ionizing radiation, consisting essentially of:
- (A) from 10 to 90 weight percent of a reactive monomer having at least one amide functional group, said monomer selected from the group consisting of:
- 68
- where R1, R2, R3, R4, and R5 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- aliphatic groups with amide or acrylamide substituent, and aliphatic groups with R′O— substituent where R′ represents aliphatic group, CnH2n+1 and CnH2n−1 (n=1 to 20);
- 69
- where R1 and R2 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- and acetamide;
- 70
- where R1 and R2 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- and unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- 71
- where R1 and R2 are selected from the group consisting of:
- hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- and amino-substituted aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (B) from 10 to 90 weight percent of a multifunctional cross-linking agent, said cross-linking agent consists of a backbone having at least 2 functional groups, said backbone is selected from the group consisting of:
- (1) linear or branched aliphatic chains, —(CRH)n—, n=1-1000, where R represents an aliphatic group, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (2) ethylene glycol chains, —(CH2CH2O)n— where n=1-1000;
- (3) propylene glycol chains, —(CH(CH3)CH2O)n— where n=1-1000;
- (4) cyclohexyl;
- and
- (5) isocyanurate, C3N3O3;
- and
- wherein the functional groups are selected from the group consisting of:
- (a) acrylates,
- 72
- where R1, R2, and R3 are selected from the group consisting of hydrogen and aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (b) carboxylic acid, —COOH;
- (c) epoxides,
- 73
- where R1, R2, and R3 are selected from:
- hydrogen or aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- and
- (d) vinyls,
- 74
- where R1, R2, and R3 are selected from:
- hydrogen or aliphatic groups, CnH2n+1 and CnH2n−1 (n−1 to 20);
- and
- (C) 5-90 weight percent of a polymer binder.
A composition, that can be polymerized/cross-linked imagewise by ionizing radiation, consisting essentially of:
- (A) from 10 to 90 weight percent of a reactive monomer having at least one amide functional group, said monomer selected from the group consisting of:
- 75
- where R1, R2, R3, R4, and R5 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- aliphatic groups with amide or acrylamide substituent, and aliphatic groups with R′— substituent where R′ represents aliphatic group, CnH2n+1 and CnH2n−1 (n=1 to 20);
- 76
- where R1 and R2 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- and acetamide;
- 77
- where R1 and R2 are selected from the group consisting of hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- and unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- 78
- where R1 and R2 are selected from the group consisting of:
- hydrogen;
- aliphatic groups CnH2n+1 and CnH2n−1 (n=1 to 20);
- unsaturated aliphatic groups CnH2n−1 (n=1 to 20);
- and amino-substituted aliphatic groups, CnH2n+1 n C2n−1 (n=1 to 20);
- (B) from 10 to 90 weight percent of a multi functional cross-linking agent, said cross-linking agent consists of a backbone having at least 2 functional groups, said backbone selected from the group consisting of:
- (1) linear or branched aliphatic chains, —(CRH)n—, n=1-1000, where R represents an aliphatic group, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (2) ethylene glycol chains, —(CH2CH2O)n— where n=1-1000,
- (3) propylene glycol chains, —(CH(CH3)CH2O)n— where n=1-1000;
- (4) cyclohexyl;
- and
- (5) isocyanurate, C3N3O3;
- and wherein the functional groups are selected from the group consisting of:
- (a) acrylates,
- 79
- where R1, R2, and R3 are selected from the group consisting of hydrogen and aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (b) carboxylic acid, —COOH;
- (c) epoxides,
- 80
- where R1, R2, and R3 are selected from:
- hydrogen or aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- and
- (d) vinyls,
- 81
- where R1, R2, and R3 are selected from:
- hydrogen or aliphatic groups, CnH2n+1 and CnH2n−1 (n=1 to 20);
- (C) 5 to 90 weight percent of a polymer binder;
- and
- (D) 5 to 90 weight percent of metallic or oxide fillers, said metallic filler is selected from group consisting of Al, Ti, V, Cu, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, In, and Sb;
- said oxide filler is selected from the group consisting of Al, Ti, V, Cu, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, In, Sb, Ta, W, and Si.
A method of microfabricating ceramic or metal patterns on a solid substrate using ionization radiation comprising the steps of:
- mixing together a composition consisting essentially of a reactive monomer, a multi-functional cross-linking agent and filler;
- said mixing process optionally carried out either by heating the composition until melted or by dissolving components in a common solvent;
- optionally, in the presence of binder;
- and
- optionally, in the presence of a radiation sensitizer;
- casting the composition on a solid substrate to form a film of desired thickness;
- irradiating the film with ionization radiation through a mask to form a polymerized/cross-linked image;
- developing the polymerized/cross-linked image by rinsing the irradiated film in a solvent to remove unirradiated composition;
- and
- sintering the polymerized/cross-linked image in microfabricated ceramics or metal patterns.
A method of performing lithography on a semiconductor surface using ionization radiation, comprising the steps of:
- mixing together a composition consisting essentially of a reactive monomer and a multi-functional cross-linking agent, optionally by heating the composition until melted or by dissolving in a common solvent;
- optionally, in the presence of a polymer binder;
- and
- optionally, in the presence of a radiation sensitizer;
- casting the composition on a solid substrate to form a film of desired thickness;
- irradiating the film with ionization radiation through a mask to form a polymerized/cross-linked image;
- developing the polymerized/cross-linked image by rinsing the irradiated film in a solvent to remove unirradiated composition.
A method of forming a three-dimensional solid object of polymers, ceramics, or metals using ionization radiation, comprising the steps of:
- mixing together a composition consisting essentially of a reactive monomer, a multi-functional cross-linking agent, and a polymer binder, said mixing process optionally done by dissolving in a common solvent or by pouring the composition into a container with a target substrate immersed in it;
- optionally, in the presence of a radiation sensitizer;
- and
- optionally, in the presence of a metallic or oxide filler;
- irradiating the composition with ionization radiation through a mask or a focused source of ionization radiation to deposit a layer of material on the targeted substrate;
- stepping back the substrate and irradiating the substrate;
- repeating the step of stepping back the substrate and irradiating the substrate until a desired three-dimensional solid object is formed;
- and
- optionally, treating the solid object post-irradiation.
Dependencies are inferred from the claim text.