| 摘要 |
<p>Provided is an ESD protection device which has high insulation reliability and good discharge characteristics. An ESD protection device which is provided with: first and second discharge electrodes that are arranged so as to face each other; an auxiliary discharge electrode (18) that is formed so as to straddle the space between the first and second discharge electrodes; and an insulating base that holds the first and second discharge electrodes and the auxiliary discharge electrode (18). The auxiliary discharge electrode (18) is configured of an assembly of a plurality of metal particles (24) each of which has a core-shell structure that is formed of a core part (22), which is mainly composed of a first metal, and a shell part (23), which is mainly composed of a metal oxide that contains a second metal. The core part (22) of each metal particle (24) has an aspect ratio of 1.5 or more, preferably an aspect ratio of 10 or more. As the aspect ratio of the core part (22) of the metal particle (24) becomes higher, the discharge area in the surface of the metal particle (24) becomes larger, so that the discharge starting voltage can be decreased.</p> |
