Murata Manufacturing Co., Ltd.

Yukio Maeda

Hiroki Hashimoto

Tatsuya Mizuno

Mitsuru Ueda

Masaharu Konoue

Shuji Matsumoto

Masanori Okamoto

Masashi Matsubara

Daigo Matsubara

Masatoshi Kariya

Provided is a mother ceramic substrate that, when divided into individual substrates (ceramic substrates), can be divided to cause divided end surfaces to be perpendicular to principal surfaces of the individual substrates, and that can provide ceramic substrates with high form accuracy; an individual ceramic substrate obtained from the mother ceramic substrate; a module component including the ceramic substrate; and a method of manufacturing a mother ceramic substrate. In a mother ceramic substrate that can be divided at a predetermined position and separated into a plurality of individual substrates, a dividing groove that defines a division position is formed in a principal surface on one side, and a protruding thread is formed on a principal surface on another side at a position corresponding to a position of the dividing groove formed in the principal surface on the one side in view in a thickness direction of the mother ceramic substrate.

Mother ceramic substrate, ceramic substrate, mother module component, module component, and method of manufacturing mother ceramic substrate

The present disclosure provides a surge protection device including a ceramic substrate (), at least one pair of discharge electrodes () disposed on a surface of the ceramic substrate () so as to face each other at end portions thereof with a space in between, outer electrodes () electrically connected to the corresponding discharge electrodes (), and a discharge auxiliary electrode () disposed between the end portions of the pair of discharge electrodes () The discharge auxiliary electrode () contains crystalized glass and particles of conductive powder () dispersed apart from each other in the crystalized glass.

Surge protection device, method for manufacturing the same, and electronic component including the same

A highly reliable multilayer coil component is provided without forming voids between magnetic ceramic layers and internal conductor layers. According to the multilayer coil component, an internal stress problem is reduced, the direct current resistance is low, and fracture of internal conductors caused by the surge or the like is not likely to occur. An acidic solution is allowed to permeate a magnetic ceramic element from a side surface thereof through a side gap portion which is a region between side portions of the internal conductors and the side surface of the magnetic ceramic element and to reach interfaces between the internal conductors and a magnetic ceramic located therearound. A pore area ratio of the magnetic ceramic of the side gap portion which is located between the side portions of the internal conductors and the side surface of the magnetic ceramic element is set in the range of 6% to 28%.

Multilayer coil component and method for manufacturing the same

A multilayer coil component includes internal conductors made of silver (Ag) having metal films provided on surfaces thereof to suppress migration of Ag contained in the internal conductors and/or relieve internal stress between magnetic ceramic layers and internal conductor layers without forming gaps at interfaces between the internal conductors including the metal films and a magnetic ceramic surrounding the internal conductors and the interfaces between the internal conductors and the magnetic ceramic. In a manufacturing method for forming a multilayer coil, an acidic solution containing a metal is allowed to penetrate a magnetic ceramic through side surfaces thereof and side gap sections that are regions between side portions of internal conductors and the side surfaces to reach the interfaces between the internal conductors and a surrounding magnetic ceramic, whereby the metal is deposited on surfaces of the internal conductors.

Growing community of inventors

Kyoto, Japan

Yukio Maeda