| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrical part having a high airtightness even in the case of a miniaturization and a thinning. SOLUTION: The electrical part is composed of at least a plate-shaped insulating base body 1, a bank frame 3 being formed on the outer periphery of at least one main surface of the insulating base body 1 and forming a shrouding vessel with the insulating base body 1 and a wiring board with a metallic layer 17a formed on a surface on the reverse side to the insulating base body 1 of the bank frame 3 and a wiring layer 5 formed on the surface or the inside of the insulating base body 1. The electrical part is further composed of an electrical element 15 housed in the shrouding vessel formed of the bank frame 3 and the insulating base body 1 and a metallic cover body 11 being joined with the metallic layer 17a through an adhesive 19 and forming a sealed vessel with the wiring board. The electrical part is constituted so that irregularities are formed to a connecting surface 25 superposed to the bank frame 3 in a main surface opposed to the wiring board of the cover body 11, and the irregularities are formed so that in the connecting surface 25 the rate of a recessed section 25b having a difference of a height of 10μm or more from a most projecting section 25a mostly projected on the wiring board side reaches 10% or more. COPYRIGHT: (C)2005,JPO&NCIPI
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