Inductor devices – Core forms casing
Reexamination Certificate
2007-01-30
2007-01-30
Nguyen, Tuyen T (Department: 2832)
Inductor devices
Core forms casing
Reexamination Certificate
active
11241568
ABSTRACT:
A device includes: a pillar-shaped core consisting of a first magnetic insulating material that has two quadric prism segments at both ends thereof symmetrically and has a cylindrical segment, which has an external shape smaller than that of the quadric prism segments, coaxially between the two quadric prism segments; a conductor film that is formed in a substantially uniform thickness so as to cover an outer circumferential face of the pillar-shaped core; a spiral line segment having a predetermined number of circumferences that is formed in a portion present on the cylindrical segment of the conductor film by subjecting a spiral sulcus to laser trimming; an oxide film that is formed to cover at least a surface of a shoulder portion extending from a side to an upper surface of lines constituting the spiral line segment; an armor consisting of a second magnetic insulating material that is formed to cover a surface of the portion present on the cylindrical segment of the conductor film and such that an external shape the armor is a quadric prism shape; and a pair of external electrodes that are formed in a substantially equal thickness so as to cover surfaces of portions present on an end face and four sides of the respective quadric prism segments of the conductor film.
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Kakiuchi Ikuo
Maeda Masaru
Shiga Takashige
Takayama Manabu
Tosaka Shoichi
Knobbe Martens Olson & Bear LLP
Nguyen Tuyen T
Taiyo Yuden Co. Ltd.
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