Composite dielectric material, composite dielectric substrate, prepreg, coated metal foil, molded sheet, composite magnetic substrate, substrate, double side metal foil-clad substrate, flame retardant substrate, polyvinylbenzyl ether resin composition, thermosettin

A double side metal-clad composite dielectric substrate prepared by dispersing a polyvinylbenzyl ether compound and a dielectric ceramic powder in a solvent to form a slurry, applying the slurry onto a metal foil to form a coating, drying the coating to form a coated metal foil, and placing a cloth base between a pair of the coated metal foils, such that the coating is in contact with the cloth base, followed by laminating press, and wherein

• the content of the dielectric ceramic powder is from 10 to 65 vol %, based on the dielectric ceramic powder and the polyvinylbenzyl ether compound combined, and
• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A coated metal foil, comprising a metal foil having thereon a dielectric substrate prepared from a polyvinylbenzyl ether compound and a dielectric ceramic power, and wherein the content of the dielectric ceramic powder is from 10 to 65 vol %, based on the dielectric ceramic powder and the polyvinylbenzyl ether compound combined, and

• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A double side metal-clad composite dielectric substrate, prepared by dispersing a polyvinylbenzyl ether compound and a dielectric ceramic powder in a solvent to form a slurry, drying and molding the slurry into a molded sheet, and placing the molded sheet between a pair of metal foils, followed by laminating press, wherein

• the content of the dielectric ceramic powder is from 10 to 65 vol % based on the dielectric ceramic powder and the polyvinylbenzyl ether compound combined, and
• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A prepreg prepared by dispersing a polyvinylbenzyl ether compound and a magnetic powder in a solvent to form a slurry, applying the slurry to a metal foil, and drying, and

• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A substrate prepared by laminating press a prepreg prepared by dispersing a polyvinylbenzyl ether compound and a magnetic powder in a solvent to form a slurry, applying the slurry to a glass cloth, and drying, and

• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A double side metal foil-clad substrate, prepared by placing metal foils on opposite surfaces of a prepreg, followed by laminating press,

• wherein the prepreg is prepared by dispersing a polyvinylbenzyl ether compound and a magnetic powder in a solvent to form a slurry, applying the slurry to a glass cloth, and drying, and
• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A substrate prepared by laminating press a prepreg, prepared by mixing a polyvinylbenzyl ether compound and a magnetic powder at a temperature of not lower than the melting point of the polyvinylbenzyl ether compound, and molding the resulting solid mixture under pressure, and

• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A double side metal foil-clad substrate, prepared by placing metal foils on opposite surfaces of a prepreg, followed by laminating press, and

• wherein the prepreg is prepared by mixing a polyvinylbenzyl ether compound and a magnetic powder at a temperature of not lower than the melting point of the polyvinylbenzyl ether compound, and molding the resulting solid mixture under pressure, and
• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A multilayer substrate, prepared by stacking at least two plies of a prepreg, followed by laminating press, and

• wherein the prepreg is prepared by mixing a polyvinylbenzyl ether compound and a magnetic powder at a temperature of not lower than the melting point of the polyvinylbenzyl ether compound, and molding the resulting solid mixture under pressure, and
• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A prepreg prepared by dispersing a polyvinylbenzyl ether compound and a flame retardant in a solvent to form a slurry, applying the slurry to a metal foil, and drying, and

• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A substrate, prepared by laminating press a prepreg, prepared by dispersing a polyvinylbenzyl ether compound and a flame retardant in a solvent to form a slurry, applying the slurry to a glass cloth, and drying, and

• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A double side metal foil-clad composite dielectric substrate, prepared by placing metal foils on opposite surfaces of a prepreg, followed by laminating press, and

• wherein the prepreg is prepared by dispersing a polyvinylbenzyl ether compound and a flame retardant in a solvent to form a slurry, applying the slurry to a glass cloth, and drying, and
• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A prepreg prepared by mixing a polyvinylbenzyl ether compound and a flame retardant at a temperature of not lower than the melting point of the polyvinylbenzyl ether compound, and molding the resulting solid mixture under pressure, and

• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

A multilayer substrate, prepared by stacking at least two plies of a prepreg, followed by laminating press, and

• wherein the prepreg is prepared by dispersing a polyvinylbenzyl ether compound and a flame retardant in a solvent to form a slurry, applying the slurry to a glass cloth, and drying, and
• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.

An electronic part comprising at least one organic dielectric layer containing at least a polyvinylbenzyl ether compound, at least one composite magnetic layer having a magnetic powder dispersed in a polyvinylbenzyl ether compound, or at least one composite dielectric layer having a dielectric powder dispersed in a polyvinylbenzyl ether compound, and

• wherein the polyvinylbenzyl ether compound has the following formula (1):
• wherein R1 denotes methyl or ethyl, R2 denotes hydrogen or a hydrocarbon group of 1 to 10 carbon atoms, R3 denotes hydrogen or a vinylbenzyl group in a molar ratio of hydrogen to vinylbenzyl of from 60:40 to 0:100, and n is a number from 2 to 4.