ESD protection device

Patent metadata

Field	Value
Publication number	US-9380687-B2
Application number	US-201214364825-A
Country	US
Kind code	B2
Filing date	Sep 13, 2012
Priority date	Dec 12, 2011
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

An ESD protection device is provided which has a low electrostatic capacitance, a low short-circuiting rate and an excellent durability. Also, in the ESD protection device, the damage derived from short-circuiting or the peak voltage can be inhibited. The ESD protection device includes an insulating substrate, electrodes separately and oppositely disposed on the insulating substrate and a discharge inducing section arranged between the electrodes. The discharge inducing section consists of porous structure with microscopic voids discontinuously dispersed therein and has a hollow structure in which at least one hollow space is contained. Further, the plane where the hollow structure is formed has a dense structure.

First claim

What is claimed is:

1. An ESD protection device, comprising
an insulating substrate, electrodes separately and oppositely disposed on the insulating substrate and a discharge inducing section arranged between the electrodes,
wherein said discharge inducing section consists of porous material in which microscopic voids are discontinuously dispersed, has a hollow structure which contains at least one hollow space, and a plane that is exposed to and surrounds the hollow space, the plane having a density that is greater than a density of other portions of the discharge inducing section that are separated from the hollow space by the plane.

2. The ESD protection device of claim 1 , wherein,
the plane of said discharge inducing section where the hollow structure is formed has a composite structure in which at least one conductive inorganic material is discontinuously dispersed in a matrix of at least one insulating inorganic material.

3. The ESD protection device of claim 1 , wherein,
the plane of the discharge inducing section where the hollow structure is formed contains glass component, and the glass component is contained with a ratio of 20 vol % or more.

4. The ESD protection device of claim 1 , wherein,
the hollow space is formed so as to extend along a direction connecting the electrode.

5. The ESD protection device of claim 2 , wherein,
the plane of the discharge inducing section where the hollow structure is formed contains glass component, and the glass component is contained with a ratio of 20 vol % or more.

6. The ESD protection device of claim 2 , wherein,
the hollow space is formed so as to extend along a direction connecting the electrode.

7. The ESD protection device of claim 3 , wherein,
the hollow space is formed so as to extend along a direction connecting the electrode.

8. The ESD protection device of claim 5 , wherein,
the hollow space is formed so as to extend along a direction connecting the electrode.

Assignees

• Asakura Kensaku
• Suzuki Shingo
• Fujimori Takahiro
• Tdk Corp

Inventors

• Asakura Kensaku
• Suzuki Shingo
• Fujimori Takahiro

Classifications

• H01T1/20

  Means for starting arc or facilitating ignition of spark gap · CPC title

• H05F3/04 Primary

  by means of spark gaps or other discharge devices (devices providing for corona discharge per se H01T19/00) · CPC title

• H01T4/12 Primary

  hermetically sealed · CPC title

• H01T4/10

  having a single gap or a plurality of gaps in parallel · CPC title