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Surge absorber

A technology for surge absorption and components, applied in the field of surge absorbers, can solve the problems of weak coating adhesion and difficulty in fully exerting the characteristics of SnO coating, and achieve the effect of suppressing scattering and shortening life.

Inactive Publication Date: 2006-08-23
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is, in the above-mentioned conventional surge absorber, for example, SnO is formed by a thin film forming method such as a chemical vapor deposition (CVD) method. 2 coating, but due to the SnO on the cap electrode 2 The adhesion of the film is weak, so, through the SnO during the main discharge 2 The peeling of the film makes it difficult to fully utilize the SnO 2 Film characteristics

Method used

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Examples

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Embodiment 1

[0101] Second, refer to Figure 9 and Figure 10 , the surge absorber related to the present invention will be described in detail through examples.

[0102] The lifetimes of the surge absorber 20 according to the second embodiment described above and a conventional surge absorber without the oxide film 23B were compared with each other when mounted on a substrate or the like and used.

[0103] Specifically, as an example, the Figure 9 The surge current shown is repeatedly applied to the surge absorber for a given number of times, and the result of measuring the discharge start voltage V in the gap at this time is expressed in Figure 10 Indicated.

[0104] In the conventional surge absorber, if the surge current is repeatedly applied, the metal components of the metal electrodes of the main discharge electrode parts are mostly scattered, and these metal components accumulate in the micro gaps in a short time, so the discharge between the gaps starts. The voltage is reduc...

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Abstract

A surge absorber in which an oxide layer excellent in chemical stability in the high temperature range and excellent in adhesion to main discharge electrodes is deposited on the main discharge electrodes. The surge absorber comprises a cylindrical ceramic body (4) on which conductive films (3) separated by a discharge gap (2) are formed, a pair of main discharge electrode members (5) opposedly disposed at both ends of the cylindrical ceramic body (4) and in contact with the conductive films (3), and a tubular ceramic body (7) in which the paired main discharge electrode members (5) are opposed, the cylindrical ceramic body (4) is contained, and a filling gas (6) is sealed. Each of the paired main discharge electrode members (5) has a projecting support (9). The opposed surfaces of the projecting supports (9) serve as main discharge surfaces (9A). Oxide films (9B) are formed on the main discharge surfaces (9A) by oxidation.

Description

technical field [0001] The present invention relates to a kind of surge absorber (Surge absorber) which is used to protect various machines from surges and prevent accidents before they occur. Background technique [0002] In the past, communication equipment such as telephones, facsimile machines, modems and other electronic equipment connected to communication lines, power lines, antennas, or CRT drive circuits, etc., were susceptible to abnormal currents (surge currents) caused by lightning surges or static electricity. A surge absorber is connected to the part that receives an electric shock from an abnormal voltage (surge voltage) in order to prevent damage such as thermal damage or ignition of the electronic device or the printed circuit board on which the device is mounted due to the abnormal voltage. [0003] Conventionally, for example, a surge absorber using a surge absorbing element having a micro gap has been proposed. This surge absorber is a discharge type sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T4/12
Inventor 社藤康弘尾木刚足立美纪李成圭栗原卓植田稔晃
Owner MITSUBISHI MATERIALS CORP
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