US 7,690,009 B2 · Electromagnetic field generating element, information recording/reproducing head and information recording/reproduction apparatus

Abstract

An electromagnetic field generating element restrains magnetic field attenuation or magnetic field delay in a high frequency recording/reproducing head for thermally assisted magnetic field recording/reproduction using a near field. An information recording/reproducing head and an information recording/reproducing apparatus carry out high frequency magnetic recording/reproduction. The electromagnetic field generating element includes: (i) a substrate, (ii) conductors each provided on the substrate and each serving as a supporting section, (iii) a plate-like-shaped conductor provided on the conductors and (iv) a semiconductor laser element provided on the substrate. The semiconductor laser element irradiates laser light to the plate-like-shaped conductor substantially parallel to an extending flat surface of the plate-like-shaped conductor. This causes generation of a near field in the plate-like-shaped conductor. In addition, a magnetic field is generated by supplying a current to the plate-like-shaped conductor.

Claims17

Dependent claims

An electromagnetic field generating element, comprising:

a substrate;
a conductor clump including a first conductor provided on the substrate, a second conductor which is in contact with the first conductor and has a plate-like shape, and a third conductor which is in contact with the second conductor;
and
light irradiation means, which is provided on the substrate, irradiating light, wherein
a magnetic field is generated when the second conductor receives a current via the first and third conductors,
the light irradiation means irradiates light towards the second conductor substantially parallel to an extending flat surface of the second conductor without change of orientation of the light irradiated from the light irradiation means.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/316,592Filed 12 Dec 2008 · division

Priority

JP 2004-28067027 Sep 2004

Published

US 2009/0106783 A123 Apr 2009

Granted

30 Mar 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G11B 11/10536
For recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording: using thermic beams,…
G11B 5/1278
Structure or manufacture of heads, e.g. inductive: specially adapted for magnetisations perpendicular to the surface of the record carrier
G11B 5/314
Including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat…:…
G11B 7/1387
Means for guiding the beam from the source to the record carrier or from the record carrier to the detector: using the near-field effect

Electromagnetic field generating element, information recording/reproducing head and information recording/reproduction apparatus

Life of this patent

Electromagnetic field generating element, information recording/reproducing head and information recording/reproduction apparatus

Life of this patent

Abstract

Claims17