Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Mikio Taoka

Hideo Nakano

Toshihiro Yoshizawa

Shunji Hashimoto

Toyonori Kanetaka

Akira Fujimori

Hideaki Nakayama

Hiromasa Yamamoto

Kenichi Yamada

Nobuya Matsutani

Hitoshi Ishimoto

Hidenori Uematsu

Koji Shimoyama

Michio Ohba

Hiroshi Otake

Hironori Arima

In an inductance component, a stress is not locally applied even in the condition where heat is applied to entire component, such as when implementing soldering, so that high reliability is realized. For realizing this, the component includes an element, a coil formed in the element, terminals electrically connected to the coil, and magnetic layers arranged so as to be substantially parallel to a winding surface of the coil are formed in the element and the entirety of the magnetic layers is covered with a material of which thermal expansion and contraction rate is uniform.

Inductance component

Method of manufacturing a chip inductor including the steps of, a conductive layer forming process for forming conductive layeron an outer peripheryand end surfacesof a substrate, a coil portion forming process for forming coil portionhaving conductorand grooveby cutting spirally the conductive layeran etching process for etching the substratehaving the coil portionformed thereon; an insulation resin coating process for forming outer coatingby coating a surface of the conductive layerwith insulation resinand an electrode forming process for forming electrodesat both ends of the coil portionand for making electric contacts between electrodesand the conductive layerA chip inductor having a flattened mounting surface of the outer coating is obtained when insulation resin layeris formed by an electrodeposition method in the insulation resin coating process. The chip inductor can be securely mounted to a circuit board.

Method of manufacturing chip inductor

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 ( ) made of an insulating material, electrode units ( ) disposed at both ends of this main body ( ), a coil unit ( ) connected to the electrode units ( ) and disposed on the outer circumference of the main body ( ) between the electrode units ( ), and an exterior unit ( ) having this coil unit ( ) coated with an insulating resin ( ), in which the coil unit ( ) includes linear conductors ( ) and grooves ( ) formed by grooving a conductor layer ( ) covering the surface of the main body ( ), and the insulating resin ( ) is also formed in the entire inside of the grooves ( ).

Chip inductor and its manufacturing method

A chip inductor of a sealed type having a square-shaped winding comprises a bobbin for winding, which has a square-shaped flange on its both ends, and a metal terminal sticking out from the outer side surface of each respective flange and each respective metal terminal being bent inside each respective flange upward so as to stick out to the upper side surface of the flange, also have the foregoing metal terminal further bent along the upper side surface of the flange, and further make insert-molding of the foregoing bent terminal possible to form the bobbin for winding.

Method of forming a chip inductor

The object of the present invention is to provide a chip inductor structured for miniaturization excellent mass-producibility and high reliability. A chip inductor of a sealed type having a square-shaped winding comprises a bobbin for winding, which has a square-shaped flange on its both ends, and a metal terminal sticking out from the outer side surface of each respective flange and each respective metal terminal being bent inside each respective flange upward so as to stick out to the upper side surface of the flange, also have the foregoing metal terminal further bent along the upper side surface of the flange, and further make insert-molding of the foregoing bent terminal possible to form the bobbin for winding.

Chip inductor

Chip inductor and method for manufacturing the same

The object of the present invention is to provide a chip inductor structured for miniaturization, excellent mass-producibility and high reliability. A chip inductor of a sealed type having a square-shaped winding comprises a bobbin for winding, which has a square-shaped flange on its both ends, and a metal terminal sticking out from the outer side surface of each respective flange and each respective metal terminal being bent inside each respective flange upward so as to stick out to the upper side surface of the flange, also have the foregoing metal terminal further bent along the upper side surface of the flange, and further make insert-molding of the foregoing bent terminal possible to form the bobbin for winding.

Chip coil

The object of the present invention is to provide a chip inductor structured for miniaturization, excellent mass-producibility and high reliability. The present invention discloses a chip inductor of a sealed type having a square-shaped winding comprising a bobbin a winding, which has a square-shaped flange on its both ends, and a metal terminal sticking out from the outer side surface of each respective flange with each respective metal terminal being bent inside each respective flange upward so as to stick out to the upper side surface of the flange, and also having the foregoing metal terminal further bent along the upper side surface of the flange, making it possible to insert mold the foregoing bent terminal forming the bobbin for a winding.

A leadless chip inductor having metallic terminal plates and a coil element fixed to the metallic terminal plates, the metallic terminal plates being partially enclosed, together with the coil element, by a resin molded cover, the portions of the metallic terminal plates exposed to the outside of the molded outer cover being bent along the edge of the molded cover so as to form terminals for connection to an external circuit. The mechanical and electrical connection between the metallic terminal plates and the lead lines led from the coil is achieved by brazing or welding the lead lines to the undersides of a narrow strip-shaped tabs which is projected from each metallic terminal plate. With this arrangement, the coil lead lines are securely connected to the metallic terminal plates.

Growing community of inventors

Neyagawa, Japan

Mikio Taoka