Abstract: The present invention discloses an insulation structure for multilayer passive elements and a fabrication method thereof, wherein a protective insulation film is formed on the surface of a multilayer passive element; a transformation process is performed at a transformation temperature to convert the protective insulation films within the areas exactly below external electrodes into conductors, and the other portion of the protective insulation film still remains insulating. The present invention can protect passive elements from corrosion in the succeeding procedures with a simple fabrication process and without extra material and equipments. Further, the fabrication speed of the present invention is the same as that of a common external-electrode coating, and the fabrication of the present invention can also be automated for mass-production.

Abstract: A filtering device for a portable beverage bottle has a cap with a suction tube adapted to detachably mount on an opening of the beverage bottle, and at least one filter element detachably secured below the cap. The at least one filter element is accommodated inside the portable beverage to purify water conveniently. Additionally, a movable hat is attached on the suction tube to selectively close or open the filtering device.