Thiosulfate-containing polymers associated with photosensitizer component
A photocurable or thermally curable thiosulfate-containing polymer has (a) recurring units and (d) recurring units, shown as either Structure (I) or (II) and Structure (V) below: R represents the organic polymer backbone, G is a single bond or divalent linking group, Q + is an organic charge balancing cation, M represents a charge balancing cation, and “a” represents at least 0.5 mol % and to 99.5 mol % of (a) recurring units; R″ represents the organic polymer backbone, G″ is a carbonyloxy group, R 3 comprises a monovalent linear, branched, or carbocyclic non-aromatic hydrocarbon group having 1 to 18 carbon atoms, or it comprises a phenyl group having one or more such substituents, and “d” represents at least 0.5 mol % and to 99.5 mol % of (d) recurring units. These thiosulfate-containing polymers can be used to made dielectric compositions and gate dielectric layers in various devices.
1. A photocurable thiosulfate-containing polymer that has a T g of at least 50° C. and comprises: (a) recurring units comprising pendant thiosulfate groups, and (d) recurring units, wherein the photocurable thiosulfate-containing polymer has sensitivity to irradiation at a wavelength of from 150 nm to 700 nm to cause the pendant thiosulfate groups to form disulfide bonds,
which (a) recurring units are represented by Structure (II) below, and the (d) recurring units are represented by Structure (V) below:
wherein R represents an organic polymer backbone, G is a single bond or divalent linking group, Q + is an organic charge balancing cation, and “a” represents at least 0.5 mol % and up to and including 99.5 mol % of (a) recurring units, based on the total recurring units in the photocurable thiosulfate-containing polymer;
wherein R″ represents an organic polymer backbone, G″ is a carbonyloxy group, R 3 comprises a monovalent linear, branched, or carbocyclic non-aromatic hydrocarbon group having 1 to 18 carbon atoms, or R 3 comprises a phenyl group having one or more linear, branched, or carbocyclic non-aromatic hydrocarbon substituents, at least one of which linear, branched, or carbocyclic non-aromatic hydrocarbon substituent has at least 6 carbon atoms and up to and including 18 carbon atoms, and “d” represents at least 0.5 mol % and up to and including 99.5 mol % of (d) recurring units, based on the total recurring units in the photocurable thiosulfate-containing polymer.
2. The photocurable thiosulfate-containing polymer of claim 1 , wherein the organic charge balancing cations are selected from quaternary ammonium, pyridinium, morpholinium, benzolium, imidazolium, alkoxypyridinium, thiazolium, and quinolinium monovalent cations.
3. The photocurable thiosulfate polymer of claim 1 , further comprising (c) recurring units that are represented by the following Structure (IV):
wherein R′ represents the organic polymer backbone, G′ is a single bond or a divalent linking group, R 2 is an electron-accepting photosensitizer component derived from a cyano-substituted carbocyclic aromatic compound, an aromatic anhydride, an aromatic imide, a condensed pyridinium salt, a pyrylium salt, a quinone, or a ketocoumarin, and
“c” represents at least 1 mol % and up to and including 10 mol % of (c) recurring units, based on the total recurring units in the photocurable thiosulfate-containing polymer.
4. The photocurable thiosulfate-containing polymer of claim 1 , which comprises the (a) recurring units in an amount of at least 5 mol % and up to and including 30 mol %, and the (d) recurring units in an amount of at least 1 mol % and up to and including 30 mol %, all based on total recurring units in the photocurable thiosulfate-containing polymer.
5. The photocurable thiosulfate-containing polymer of claim 1 that has sensitivity to irradiation at a wavelength of from 150 nm to 450 nm to cause the pendant thiosulfate groups to form disulfide bonds.