Multi-layered aluminum oxide capacitor

Patent metadata

Field	Value
Publication number	US-10163567-B2
Application number	US-201514816182-A
Country	US
Kind code	B2
Filing date	Aug 3, 2015
Priority date	Aug 4, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

The present invention relates to a multi-layered aluminum oxide capacitor comprising an aluminum substrate; a plurality of aluminum oxide layer formed in at least a portion of on both sides or one side of the substrate with respect to the aluminum substrate; and a plurality of electrode layers formed on the aluminum oxide layers. According to the present invention, manufacturing process is more simplified since Al 2 O 3 insulation layer is formed by anodizing the aluminum layer without forming an extra insulation layer after forming the aluminum layer, so that the manufacturing cost can be reduced, and also a multi-layered capacitor having a high capacitance and a high reliability can be provided by stacking capacitors comprising a plurality of aluminum oxide layers using a more simplified process according to the present invention.

First claim

What is claimed is:

1. A multi-layered capacitor comprising:
an aluminum substrate having at least one bending portion;
anodized aluminum oxide layers partially formed on both sides of the aluminum substrate by anodizing the aluminum substrate such that the anodized aluminum oxide layers are vertically aligned with each other with respect to a surface of the aluminum substrate;
metal electrode layers, formed on and in direct contact with the anodized aluminum oxide layers, respectively; and
at least one lead portion formed between the metal electrode layers for applying electricity to the metal electrode layers which are bonded together,
wherein the anodized aluminum oxide layers are not formed at the bending portion, and the anodized aluminum oxide layers function as dielectric layers of the capacitor,
wherein the bending portion comprises a groove having a V-shaped cross-section, and
a peak of the V-shaped cross-section of the groove faces a direction perpendicular to a stacking direction of the multi-layered capacitor.

2. A multi-layered capacitor comprising:
an aluminum substrate;
anodized aluminum oxide layers partially formed on both sides of the aluminum substrate by anodizing the aluminum substrate such that the anodized aluminum oxide layers are vertically aligned with each other with respect to a surface of the aluminum substrate;
metal electrode layers, formed on and in direct contact with the anodized aluminum oxide layers, respectively,
wherein the aluminum substrate includes a bending portion comprising a groove having a V-shaped cross-section and is bent with respect to the bending portion,
wherein the anodized aluminum oxide layers are not formed at the bending portion, and the anodized aluminum oxide layers function as dielectric layers of the capacitor, and
wherein a peak of the V-shaped cross-section of the groove faces a direction perpendicular to a stacking direction of the multi-layered capacitor.

3. The capacitor according to claim 2 , wherein the bending portions are formed alternately at an upper surface and at a lower surface of the aluminum substrate.

Assignees

• Point Engineering Co Ltd

Inventors

• Ahn Bum Mo
• Park Seung Ho

Classifications

• H01G4/30

  Stacked capacitors (H01G4/33 takes precedence) · CPC title

• H01G4/008 Primary

  Selection of materials · CPC title

• H01G4/129

  containing a glassy phase, e.g. glass ceramic · CPC title

• H01G4/232

  electrically connecting two or more layers of a stacked or rolled capacitor · CPC title

• H01G4/26

  Folded capacitors · CPC title