Tdk Corporation

Yasuhiko Kitajima

Takashi Nagasaka

Takayuki Ito

Tsutomu Chou

Kazuo Sato

Akira Sato

Tsuneo Suzuki

Hideharu Moro

Hironori Sato

Hideki Miura

Mitsuhiro Yamashita

Kazuhiko Shibata

Junetsu Tamura

Yasuhiro Matsukawa

Daisuke Urabe

Hitoshi Sasaki

Koji Shimura

Yoshiyuki Takanashi

Touru Mizuno

Takashi Ishii

A coil component having a core, first and second terminal electrodes provided on the core, and a conducting wire having a winding portion provided on the core and end portions electrically connected to the first and second terminal electrodes to provide first and second connecting portions. The core has one side surface at which the first and second connecting portions are provided. When viewing the one side surface, a wire portion in the winding portion extends in a first direction, and a wire portion extending from the second connecting portion extends toward the winding portion in a second direction. The first and second directions define an intersection angle of not more than 90 degrees.

Coil component and method for producing the same

A coil apparatus having a divided winding conformation and a manufacturing method of the coil apparatus which can prevent a winding from collapsing while achieving a reduction in size of a core and simplification of a structure. A coil apparatus includes a ferrite core and a coil provided around the core. The coil includes at least a first coil portion and a second coil portion, and a boundary end surface of the first coil portion on the second coil portion side is inclined in such a manner that its inner peripheral side is closer to the second coil portion than its outer peripheral side. Further, a boundary end surface of the second coil portion on the first coil portion side is inclined in such a manner that its outer peripheral side is closer to the first coil portion than its inner peripheral side.

Coil device

A coil apparatus that can increase mechanical strength of terminal portions and assure sufficient impact resistant properties and vibration resistant properties even in an application in a severe use environment such as an in-vehicle coil apparatus. Terminals are formed of one metal sheet, and include an attachment portion, an intermediate portion, and a bottom portion. One end of the attachment portion is fixed at each terminal attachment portion of a core. One end of the intermediate portion is continuous with the other end of the attachment portion at a first bent portion. The bottom portion has a first end continuous with the other end of the intermediate portion at a second bent portion, facing the attachment portion, and a second free end. The intermediate portion has a hole in a plane thereof. In each hole, both inner edges that are opposed to each other in at least one direction have an arc shape.

A coil-embedded dust core and a method for manufacturing the coil-embedded dust core are provided. The coil-embedded dust core comprises a coil formed from a flat conductor wound in a coil configuration, and a green body consisting of insulating material-coated ferromagnetic metal particles. This results in a coil-embedded dust core more compact in size but with larger inductance. A rectangular wire can be used as the flat conductor. In addition, parts of the coil may function as terminal sections. In this case, the terminal sections of the coil may be formed wider than other part of the coil. The coil-embedded dust core is less prone to joint failures between a coil and terminal sections and to insulation failures of the coil and the terminal section with respect to the magnetic powder. The coil-embedded dust core is more compact while achieving larger inductance.

Coil-embedded dust core and method for manufacturing the same

A method of optically checking the appearances of chips and sorting the chips comprises the steps of feeding chips onto chip-passage body to cause the chips to run on the chip-passage body in a predetermined direction; during the running of the chips on the chip-passage body, individually separating the chips to stop the chips one by one at each of two predetermined checking positions; irradiating light obliquely and straightly with respect to a chip at one of the predetermined checking positions to pick up an optical image of one of undersurface and top surface sides of the chip as a video signal by means of a first TV camera; irradiating light obliquely and straightly with respect to the chip at the other of the predetermined checking positions to pick up an optical image of the other of the undersurface and top surface sides of the chip as a video signal by means of a second TV camera; sending the video signals to image processing sections, each of which includes at least an analog-to-digital conversion unit, a video memory and a central processing unit, to process the video signals in the image processing sections and obtain data on the appearance of the chip and a tilt angle of the chip on each of the predetermined checking positions of the chip-passage body, thereby checking on the basis of the data whether the chip is acceptable or defective in its appearance; and thereafter sorting chips on the basis of the check results. Also, an apparatus for optically checking the appearances of chips and sorting the chips is disclosed.

Method of and apparatus for optically checking the appearances of

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Tokyo, Japan

Yasuhiko Kitajima