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Dielectric films, film capacitors, and electronic devices

一种电介质膜、膜电容器的技术，应用在薄膜/厚膜电容器、电容器、固定电容器等方向，能够解决妨碍基板低高度化安装密度的提高、尺寸大等问题，达到优异整流作用、小型安装密度、击穿电场强度高的效果

Active Publication Date: 2018-10-02
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, compared with other electronic components such as ceramic capacitors, film capacitors are still larger in size than other electronic components such as ceramic capacitors on substrates on which various electronic components are mounted. Research on the miniaturization of

Method used

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  • Dielectric films, film capacitors, and electronic devices
  • Dielectric films, film capacitors, and electronic devices
  • Dielectric films, film capacitors, and electronic devices

Examples

Experimental program
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Embodiment

[0070] Select specific materials to make dielectric films. First, ceramic particles of composite oxides shown in Table 1 were prepared as ceramic particles. The ceramic particle is a material in which a dielectric material mainly composed of barium titanate is used as a core, and Mg, Sr, Zr, and Sn are solid-dissolved as oxides on the entire surface. In addition, the specific permittivity of the ceramic particle evaluated as ceramics was 1500-2500.

[0071]As an organic resin, a polycycloolefin polymer (molecular weight: Mw=20000, specific permittivity: 2.2) was prepared. In order to improve the compatibility with organic resins, the ceramic particles are subjected to silane coupling treatment.

[0072] Next, the above-mentioned ceramic particles are dispersed in a cycloolefin polymer to prepare a slurry. At this point, cyclohexane was added as a diluent.

[0073] Then, the above-mentioned slurry was coated on a polyethylene terephthalate (PET) film using a coater, and for...

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Abstract

The present invention provides a dielectric film, a film capacitor and an electronic device that can increase the specific permittivity without reducing the breakdown electric field strength. A dielectric film comprising, in an organic resin 5, ceramic particles 3 having two or more crystal phases that form a crystal lattice formed by three axes passing through a, b, and c and that have a different axial ratio c / a 3a, 3b. Due to the difference in lattice shape (size), the degree of dielectric polarization of each crystal phase 3a, 3b is different, so the ceramic particles 3 have regions with different dielectric constants, which can increase the specific dielectric constant without reducing breakdown. Electric field strength.

Description

technical field [0001] The present invention relates to dielectric films, film capacitors and electronic devices. Background technique [0002] A film capacitor has, for example, a metal film formed by evaporation on the surface of a dielectric film made of polypropylene resin as an electrode. With such a structure, the film capacitor has the following advantages: even if a short circuit occurs in the insulation defect part of the dielectric film, the metal film around the defect part evaporates and scatters due to the energy of the short circuit, and insulation occurs, thereby preventing the film capacitor from being damaged. Dielectric breakdown (for example, see Patent Document 1). [0003] Therefore, film capacitors are attracting attention because they can prevent burning and electric shock when the circuit is short-circuited. In recent years, they are first used in power circuits such as LED (Light Emitting Diode) lighting, and their applications are expanding (for ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/18H01G4/33C08K3/00C08K9/10H05K1/18C08K3/22H01G4/12C01G23/00C04B35/468C04B35/626H01G4/20C08L101/00C08L23/20
CPCC08L101/00H01G4/33H01G4/1209H01G4/206C04B35/4682H01G4/1227C08K3/22C01G23/006C04B35/62645C01P2002/50C01P2002/52C01P2004/64C04B2235/3206C04B2235/3208C04B2235/3213C04B2235/3225C04B2235/3244C04B2235/3293C04B2235/5445C04B2235/5454C08K9/10H01G4/18C08L23/20C08K3/00H05K1/18H05K2201/10015
Inventor 神垣耕世
Owner KYOCERA CORP