Taiyo Yuden Co., Ltd.

Hiroya Shigemoto

Yukio Ono

Tsuyoshi Matsumoto

Hideki Ogawa

Kiyoshi Tanaka

Toshiyuki Yagasaki

Satoshi Takakuwa

Hiroyuki Higuchi

As an embodiment, a pair of first conductive filmsare formed from the side face to the bottom face of the sheet partof a magnetic core, and one endof the conductive wire of the coiland the other endof the conductive wire are joined to the side facesof the first conductive films, respectively. Also, as an embodiment, the joined partsare sandwiched by the side facesof the first conductive filmsand the partof the magnetic sheathcovering the side face of the sheet partof the magnetic core, wherein the parts of the magnetic sheathcovering the joined partsare sandwiched by the side facesof the first conductive filmsand the side facesof second conductive filmsas well as the side facesof third conductive films

Coil component

An electronic part is made from a laminated object including stacked abutting ceramic green sheets each carrying an electrically conductive paste having a contact portion in proximity to an edge of the sheet. The laminated object is fired to form a laminated body including ceramic insulator layers abutting electrically conductive internal electrode layers including contact segments in proximity to a side of the object. The body is then processed so the contact segments are exposed on the side of the object. Then an external electrode is formed on the polished body where the contact segment is exposed by using a dry process so the external electrode and the contact segment abut to establish an electric contact between the external electrode and the contact segments. The firing step causes the paste to move relative to the edges of the sheets so the contact segments are displaced relative to the edges of the sheets. The processing step results in a reduction of the displacement of the contact segments relative to the edges of the sheets so the contact segments are displaced relative to the edges of the sheets by a distance to provide an anchoring effect for the external electrode when it is formed by the dry process.

Laminated electronic part having internal conducting region connected to an external contact and manufacturing method thereof

An electronic device has an element assembly, in which electronic parts elements are disposed, and external electrodes of metal film which are formed on surfaces of the element assembly of the electronic device so as to extend and connect to the electronic parts elements, respectively. Further, in this electronic device, the external electrode is made up of an anchor layer adhered on the surface of the element assembly of the electronic device, a solder-resist layer formed to cover the anchor layer, and a solder-wettable layer formed to cover a surface of the solder-resistant layer and showing a superior wettability with respect to molten solder, in which the external electrode further includes an intermediate layer provided between the solder-resistant layer and the solder-wettable layer and made of an alloy containing both metal materials forming the solder-resistant layer and the solder-wettable layer.

Electronic device

An electronic device has an element assembly, in which electronic parts elements are disposed, and external electrodes of metal film which are formed on surfaces of the element assembly of the electronic device so as to extend and connect to the electronic parts elements, respectively. Further, in this electronic device, the external electrode is made up of an anchor layer adhered on the surface of the element assembly of the electronic device, a solder-resist layer formed to cover the anchor layer, and a solder-wettable layer formed to cover a surface of the solder-resistant layer and showing a superior wettability with respect to molten solder, in which the external electrode further comprises an intermediate layer provided between the solder-resistant layer and the solder-wettable layer and made of an alloy containing both metal materials forming the solder-resistant layer and the solder-wettable layer.

Growing community of inventors

Takasaki, Japan

Hiroya Shigemoto