| 摘要 |
PURPOSE:To reduce the creep of a sealing substance on a wall surface by forming a step on the inner wall of a vessel. CONSTITUTION:A step 7 is formed on the inner wall of a vessel 4 which contains electric parts mounted on a substrate. Thus, the creep of a sealing substance 5 of liquid is controlled by a step 7, and the thickness of a substance 6 does not become extremely thin. The thickness of the substance 6 becomes uniform, thereby providing excellent impact resistance and environmental resistance. |
