Sae Magnetics (h.k.) Limited

Osamu Harakawa

Takashi Honda

Seiichi Takayama

Ryuji Fujii

Tadatoshi Koba

Hideki Tanzawa

Shi Xiong Chen

Kiyohiko Abe

Masahiro Kuribayashi

A coupling structure of optical components has a first optical component, a second optical component and a coupling solder layer. The first optical component has a lensed fiber, a first holder holding the lensed fiber and a first metal layer formed on a first connecting end face of the first holder. The second optical component has a waveguide, a second holder holding the waveguide and a second metal layer formed on a second connecting end face of the second holder. The coupling solder layer is in direct contact with both of the first metal layer and the second metal layer, and formed with solder.

Coupling structure of optical components and coupling method of the same

A method of testing a TAMH includes providing a slider body having a waveguide embedded therein with an incidence end extending toward a back surface of the slider body; providing a light source unit including a light source and a unit substrate; coating a bonding material layer on the back surface, under the bottom, or both on the back surface and under the bottom of the unit substrate; coating a localization material layer on the back surface; aligning the light source unit to the slider body; causing a light emitted from the light source and allowed to be incident on the incidence end to anneal the localization material layer to generate an annealing mark; removing the light source unit or the light source from the slider body; and measuring a position offset between the annealing mark and the incidence end. The method can evaluate alignment accuracy of a slider body and a light source unit in two dimensional directions.

Method of testing thermally-assisted magnetic head

A method of manufacturing a thermally-assisted magnetic head includes providing a light source unit including a laser diode; providing a reflection board, and a photo detector; driving the laser diode to emit a light beam towards the reflection board; performing an alignment between the light source unit and the thermally-assisted magnetic recording head section, based on a reflected light of the light beam reflected by the reflection board, then passed through the optical waveguide and finally detected by the photo detector obtaining the maximum power in a LED emission state of the laser diode; and bonding the light source unit to the slider after the alignment is completed. It improves alignment accuracy between a light source unit and a slider during a bonding process therebetween, prevents a laser diode of the light source unit instability, and improves performance of the thermally-assisted magnetic head finally.

Method of manufacturing thermally-assisted magnetic head and alignment apparatus thereof

A head stack assembly includes a mounting base, a plurality of drive arms connected with the mounting base, and multiple pairs of head gimbal assemblies connected with the drive arms. Each head gimbal assembly includes a thermal assisted magnetic head, the thermal assisted magnetic head has an air bearing surface, a bottom surface opposite to the air bearing surface, and a laser diode module mounted on the bottom surface and adapted to emit a downward laser light to a write element of the thermal assisted magnetic head and an upward laser light, wherein a light shielding structure is provided to prevent the upward laser light emitting to other laser diode modules to generate light coupling, thereby improving thermal stability of the thermal assisted magnetic head.

Head stack assembly with light shielding structure, and disk drive unit with the same

A method of manufacturing a thermally-assisted magnetic head includes aligning the light source unit to the thermally-assisted magnetic head section on the slider body; and performing a bonding between the unit substrate and the slider body with a bonding layer in between. And process of the bonding includes irradiating the bonding layer with a first laser shot, pausing for a time interval after the first laser shot, and then irradiating a second laser shot, wherein a first irradiating power of the first laser shot is weaker than a second irradiating power of the second laser shot, and a first irradiating time of the first laser shot is shorter than a second irradiating time of the second laser shot. The method can keep an accurate alignment of the unit substrate with respect to the slider after a bonding process and, in turns improve performance of the thermally-assisted magnetic head.

Growing community of inventors

Hong Kong, China

Osamu Harakawa