| 摘要 |
The present invention relates to a through electrode to be mounted on a substrate having a through hole. The through electrode includes: a penetrating part that passes through the through hole; a convex bump part that is formed on at least one end of the penetrating part and is wider than the through electrode; and a metal film that has at least one layer and is formed on a surface of the convex bump part that comes in contact with the substrate. The through electrode part and the convex bump part are formed of a sintered body prepared by sintering one or more kind of metal powder selected from gold, silver, palladium, and platinum having a purity of 99.9 wt% or more and an average particle size of 0.005 µm to 1.0 µm, and the metal film contains gold, silver, palladium, or platinum having a purity of 99.9 wt% or more. The through electrode according to present invention is useful for a circuit board having a multilayer structure, makes it possible to reduce the trace length of an element, such as MEMS, and is also adaptable to hermetic sealing. |
