Tdk Corporation

Eriko Ajioka

Hideaki Shimoda

Shigeru Asami

Hitoyoshi Kurata

Hiroshi Ikeda

Yoshinari Yamashita

Yoshikazu Soeno

A microwave-assisted magnetic head provides a high-reliability microwave-assisted magnetic head that reduces effective coercivity by giving microwave energy to a magnetic recording medium in an auxiliary manner and writes a data signal, a head gimbal assembly, and a magnetic recording and reproducing apparatus. A microwave magnetic field generating element is arranged on a trailing shield side or a reproducing head element side with respect to a main magnetic pole that generates a recording magnetic field for writing a data signal into a magnetic recording medium, the microwave magnetic field generating element having a coil configuration in which a plurality of microwave magnetic field generating lines and a return line are formed by a continuous single line.

Microwave-assisted magnetic head, head gimbal assembly, and magnetic recording and reproducing device

A microwave-assisted magnetic recording and reproducing apparatus includes a microwave power generator, a microwave magnetic field generating element, and a thin film magnetic head that may record a data signal in high density in a magnetic recording medium that has a high coercivity. A magnetic recording medium, a magnetic head that records information in the magnetic recording medium, a microwave power generator provided independently of the magnetic head, and a differential signal supply unit used to supply microwave power generated by the microwave power generator as differential signals to a microwave magnetic field generating element provided at the magnetic head are included.

Microwave-assisted magnetic recording and reproducing device

A suspension is configured to support a magnetic head slider having a recording head element for recording to a magnetic recording medium and a microwave generating element that applies a high-frequency magnetic field to the magnetic recording medium when recording to the magnetic recording medium is conducted by the recording head element. The suspension includes a flexure that supports the magnetic head slider, and a microwave signal transmission line and a recording signal transmission line that are supported by the flexure. The microwave signal transmission line is connected to the microwave generating element and configured to transmit microwave signals for generating the high-frequency magnetic field, the recording signal transmission line being connected to the recording head element and configured to transmit recording signals. The flexure has a main body part, a support part for the magnetic head slider, and a pair of arm parts that links the main body part and the support part. The recording signal transmission line is supported between the main body part and the support part by a separate support part separated from the flexure, the microwave signal transmission line is supported between the main body part and the support part by at least one of the pair of arm parts, and a portion of the one of the arm parts that supports the microwave signal transmission line has a lamination structure in which an insulating layer that supports the microwave signal transmission line on one surface and a substrate whose portion opposing the other surface of the insulating layer has conductivity are laminated.

Suspension with high conductivity ground layer for microwave signal transmission line, for magnetic head slider

A suspension is configured to support a magnetic head slider having a recording head element for recording to a magnetic recording medium and a microwave generating element that applies a high-frequency magnetic field to the magnetic recording medium when recording is conducted by the recording head element. The suspension has a flexure that supports the magnetic head slider, a microwave signal transmission line and a recording signal transmission line. The microwave signal transmission line is connected to the microwave generating element and configured to transmit microwave signals for generating the high-frequency magnetic field. The microwave signal transmission line and the recording signal transmission line are supported between the main body part and the support part, a portion of which has a first lamination structure where a first ground layer is conductive and a first insulating layer supports the microwave signal transmission.

Suspension with high conductivity ground layer

An electronic component module has a device-side module A and an antenna-side module B. The device-side module A is equipped with a first dielectric substratethat is formed with a first transmission lineand a high-frequency devicethat is mounted on the first dielectric substrateand is connected to the first transmission lineThe antenna-side module B is equipped with a second dielectric substratethat is laid on the first dielectric substratein such a manner that they are arranged in a lamination direction and that is formed with a second transmission linethat is electrically connected to the first transmission lineand an antenna elementthat is provided on the second dielectric substrateand electrically connected to the high-frequency devicevia the second transmission lineand the first transmission line

Electronic component module and manufacturing method thereof

An electronic component module according to the invention includes: a mounting substrateincluding a shield layerand on which a first cavityand a second cavityare formed; a first electronic componentpositioned in the first cavityand used in a first frequency band; a second electronic componentpositioned in the second cavityand used in a second frequency band; lid memberswhich seal the first cavityand the second cavity; and patch antennaswhich transmit/receive radio waves in the frequency bands, the antennas connected to the electronic components; wherein the electronic componentsare mounted on the mounting substratevia a substrate componenthaving a higher heat resistance than the mounting substrateand that the mounting substrateis composed of a member having a lower dielectric constant that the substrate component

Electronic component module

An electronic component module includes: printed-circuit boards on which a shield layer is formed; a spacer positioned between the printed-circuit boards, the spacer equipped with a shielding feature which forms as partitions a first cavity and a second cavity between the printed-circuit boards; a first electronic component positioned in the first cavity and mounted on any one of the printed-circuit boards and used in a first frequency band; a second electronic component positioned in the second cavity and mounted on any one of the printed-circuit boards, the second electronic component used in a second frequency band; a patch antenna formed on the surface of the printed-circuit board opposite that on which the spacer is mounted, the antenna transmitting and receiving radio waves at least one of in the first and second frequency bands; and terminals formed on the surface of the printed-circuit board opposite that on which the spacer is mounted.

An electronic component module includes a mounting substrate including a shield layer and on which a first cavity and a second cavity are formed. A first electronic component positioned in the first cavity is used in a first frequency band. A second electronic component positioned in the second cavity is used in a second frequency band. Lid members seal the first cavity and the second cavity. Patch antennas transmit/receive radio waves in the first and second frequency bands, the antennas being formed on a surface opposite to the electronic components mounting surface. And, connection terminals formed on the mounting substrate are electrically connected to the electronic components through transmission lines.

Growing community of inventors

Tokyo, Japan

Eriko Ajioka