US 6,388,550 B1 · Chip inductor and its manufacturing method

Abstract

The invention relates to a chip inductor and its manufacturing method, in which an appropriate insulation is applied between adjacent linear conductors of the coil unit to prevent occurrence of short-circuit and to enhance electric characteristics, and moreover the mounting surface by the exterior unit is a flat surface, so that appropriate mounting is realized. The constitution includes a square columnar main body (1) made of an insulating material, electrode units (6) disposed at both ends of this main body (1), a coil unit (5) connected to the electrode units (6) and disposed on the outer circumference of the main body (1) between the electrode units (6), and an exterior unit (9) having this coil unit (5) coated with an insulating resin (8), in which the coil unit (5) includes linear conductors (3) and grooves (4) formed by grooving a conductor layer (2) covering the surface of the main body (1), and the insulating resin (8) is also formed in the entire inside of the grooves (4).

Claims20

Dependent claims

A chip inductor comprising:

a main body having both ends and sides, said main body having an electric insulating property,
electrode units disposed at both ends of said main body,
a coil unit disposed on an outer circumference of the sides of the main body between each of said electrode units, in which said coil unit has a linear conductor formed by grooving a conductor layer disposed on the surface of the outer circumference of the main body,
grooves enclosed by said conductor, and
an electric insulating member including a first electric insulating portion and a second electric insulating portion, said first electric insulating portion disposed to fill up all gaps in said grooves, and said second electric insulating portion disposed to cover said linear conductors and said first electric insulating portion.

2 more elements

A manufacturing method of a chip inductor comprising:

a first step of forming a conductor layer on a square columnar main body made of an insulating material,
a second step of forming a coil unit having a linear conductor and a groove by cutting off said conductor layer,
a third step of forming electrode units at both ends of said coil unit, and
a fourth step of covering said coil unit with an insulating resin, and drying,
wherein said fourth step includes:
coating the insulating resin at a first side of said main body by a first coating,
drying said insulating resin coated at said first side,
then, coating the insulating resin at a second side of said main body by a second coating, and
drying said insulating resin coated at said second side.

6 more elements

Dependencies are inferred from the claim text.

Chip inductor and its manufacturing method

Life of this patent

Chip inductor and its manufacturing method

Life of this patent

Abstract

Claims20