Inductive element and manufacturing method of the same
First Claim
1. An inductive element having a first direction, a second direction, and a stacking direction, said inductive element comprising:
- a plurality of alternating individual sheets of conducting and insulating layers forming a stack wherein each conducting layer is integrally formed from a solid sheet into a U-shaped conductive layer such that every U-shaped conductive layer is located in a substantially same position along the first direction and the second direction and is located a distance from an adjacent U-shaped conductive layer along the stacking direction;
an embedding material filled in an area between legs of the U-shaped conducting layers; and
a bridge conductor which bridges an opening edge of the U-shaped conducting layer to an opening edge of the next U-shaped conducting layer to form a coil,wherein said U-shaped conducting layers are connected by said bridge conductor by skipping one of said U-shaped conducting layers so as to form two sets of rectangular helical coils.
1 Assignment
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Accused Products
Abstract
Conductor layers 2A and insulating layers 4A are alternately stacked so as to prepare a base material 17. A plurality of grooves 18 having a predetermined width are formed in a surface of the base material 17 in such a manner that these plural grooves 18 are located parallel to each other along a stacking layer direction in order to form a coil inner peripheral portion. Embedding materials 5 are filled into the grooves 18. Surfaces 16 of the base material into which the embedding materials 5 have been filled are flattened by polishing. The conductor layers 2A located adjacent to each other are connected to each other, so that helical coils which constitute inductive elements are constructed. Then, both the front plane and the rear plane of the resultant base material are covered by an insulating layer, which is cut so as to obtain respective chips.
28 Citations
14 Claims
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1. An inductive element having a first direction, a second direction, and a stacking direction, said inductive element comprising:
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a plurality of alternating individual sheets of conducting and insulating layers forming a stack wherein each conducting layer is integrally formed from a solid sheet into a U-shaped conductive layer such that every U-shaped conductive layer is located in a substantially same position along the first direction and the second direction and is located a distance from an adjacent U-shaped conductive layer along the stacking direction; an embedding material filled in an area between legs of the U-shaped conducting layers; and a bridge conductor which bridges an opening edge of the U-shaped conducting layer to an opening edge of the next U-shaped conducting layer to form a coil, wherein said U-shaped conducting layers are connected by said bridge conductor by skipping one of said U-shaped conducting layers so as to form two sets of rectangular helical coils. - View Dependent Claims (2, 3, 4, 5)
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6. An inductive element having a first direction, a second direction, and a stacking direction, said inductive element comprising:
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a stacked core substrate formed by stacking a plurality of core substrates, each core substrate having a U-shaped conductor corresponding to three sides of plural rectangular helical coils, every U-shaped conductive layer being located in a substantially same position along the first direction and the second direction and being located a distance from an adjacent U-shaped conductive layer along the stacking direction; a bridge conductor which bridges an opening edge of the U-shaped conductor to an opening edge of the next U-shaped conductor to form a coil; and an insulating layer covering said bridge conductors, wherein said U-shaped conductors are connected by said bridge conductor by skipping one of said U-shaped conductors so as to form two sets of rectangular helical coils. - View Dependent Claims (7, 8, 9)
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10. An inductive element comprising:
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a plurality of alternating individual sheets of conducting and insulating layers forming a stack wherein the conducting layers are solid and processed to be U-shaped; an embedding material filled in an area between legs of the U-shaped conducting layers; and a bridge conductor which bridges the U-shaped conducting layers by skipping one of said U-shaped conducting layers to form two sets of rectangular helical coils. - View Dependent Claims (11, 12, 13, 14)
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Specification