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US 11,569,036 B2Granted
Dielectric film and power capacitor comprising dielectric film
AssigneeHitachi Energy Switzerland AG
InventorsLejun Qi, Chau-Hon Ho, Linnea Petersson, Jiansheng Chen
Life of this patent
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Abstract
A dielectric film is provided. The dielectric film includes a dielectric polymer substrate having two surfaces opposite to each other and a coating layer formed on at least one of the two surfaces of the dielectric polymer substrate by chemical vapor deposition polymerization and/or irradiation polymerization. A power capacitor includes the dielectric film. A process for preparing the dielectric film is provided.
Claims15
A dielectric film comprising:
- a dielectric polymer substrate having two surfaces opposite to each other;
- and
- a coating layer formed on at least one of the two surfaces of the dielectric polymer substrate by chemical vapor deposition polymerization and/or irradiation polymerization,
- wherein the dielectric polymer substrate has a first thickness between the two surfaces and the coating layer has a second thickness less than 50% of the first thickness of the dielectric polymer substrate, and
- wherein the coating layer comprises any one selected from parylenes, polynitriles, poly(meth)acrylates, polyvinyl ethers, polyvinylidenes that are one selected from polyvinylidene chloride, polyvinylidene cyanide, and copolymers or mixtures thereof.
2 more elements
A process for preparing a dielectric film, the process comprising:
- providing a dielectric polymer substrate having two surfaces opposite to each other and a first thickness constituted between the two surfaces;
- and
- forming a coating layer on at least one of the two surfaces of the dielectric polymer substrate by chemical vapor deposition polymerization and/or irradiation polymerization, wherein the coating layer has a second thickness which is less than 50% of the first thickness of the dielectric polymer substrate, and
- wherein the coating layer comprises any one selected from parylenes, polynitriles, poly(meth)acrylates, polyvinyl ethers, and polyvinylidenes that are one selected from polyvinylidene chloride, polyvinylidene cyanide and copolymers or mixtures thereof.
1 more element
Dependencies are inferred from the claim text.