Murata Manufacturing Co., Ltd.

Murata Manufacturingco., Ltd.

Takeshi Uchida

Kazuyoshi Ishizuka

Takashi Iwamoto

Kazuhiro Yoshii

Akira Kurakake

An electronic device includes a first substrate having a wiring trace, a second substrate having an external terminal, a first electronic component disposed on a first surface of the first substrate, a second electronic component electrically connected to the first electronic component and disposed on a second surface of the first substrate, a mold layer encapsulating the first electronic component, and a conductive member disposed in the mold layer. The conductive member electrically connects the first substrate to the second substrate. A step is formed at an end of the mold layer, and the conductive member is exposed at the step. A distance between the first substrate and the second substrate is smaller than a distance between the first surface of the first substrate and a surface of the first electronic component that is positioned opposite to the first substrate.

Electronic device with exposed conductive member at step in mold and fingerprint recognition apparatus equipped with the same

A ceramic core, which is made of a ferrite material including Ni and Zn, includes an axial core extending in a length direction and a pair of flange portions disposed at both ends of the axial core in the length direction. The dimension L of the ceramic core in the length direction satisfies 0 mm&#x3c;L&#x2264;1.1 mm. The surface roughness of a ridge portion of the axial core is less than or equal to 2.5 &#x3bc;m.

Ceramic core, wire-wound electronic component, and method for producing ceramic core

A ceramic core includes an axial core part extended in the longitudinal direction, and a pair of flanges located at both ends in the longitudinal direction of the axial core part and projecting around the periphery of the axial core part in the height and width directions. The ceramic core has a length dimension L in the longitudinal direction of about 0 mm&#x3c;L&#x2264;1.1 mm. A ratio t/T of the thickness dimension t in the height direction of the axial core part to the height dimension T in the height dimension of the flanges, is about 0&#x3c;t/T&#x2264;0.6. A ratio w/W of the width dimension w in the width direction of the axial core part to the width dimension W in the width direction of the flanges, is about 0&#x3c;w/W&#x2264;0.6.

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Nagaokakyo, Japan

Takeshi Uchida