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公开(公告)号：US11973310B2
公开(公告)日：2024-04-30
申请号：US16505964
申请日：2019-07-09
发明人： Takashi Honda , Kowang Liu , Kwun Pan Ng , Makoto Kawato
CPC分类号： H01S5/0216 , G11B5/314 , H01S5/0237 , H01S5/0261 , G11B2005/0021 , H01S5/02453
摘要： A light source unit for thermally-assisted magnetic head includes a substrate member having a first bonding surface; a light source assembly attached on the first bonding surface of the substrate member and having a second bonding surface; and a heater circuit assembly formed between the substrate member and the light source assembly, the heater circuit assembly having a heater formed on the substrate member and two leads connected at two ends of the heater, the lead being thicker than the heater, thereby a distance between the heater and the second bonding surface is farther than that between the lead and the second bonding surface. The light source unit can reduce mechanical stress and thermal conduction between a light source assembly and a substrate member, thereby improving the performance of the light source assembly and the heater.
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公开(公告)号：US10943613B1
公开(公告)日：2021-03-09
申请号：US16817705
申请日：2020-03-13
发明人： Ryo Hosoi , Takashi Honda , Seiichi Takayama , Sik Fun Chan , Tai Boon Lee , Dayu Zhou
摘要： A thermally assisted magnetic head including a slider and a light source-unit. The slider includes a slider substrate and a magnetic head part. The light source-unit includes a laser diode and a sub-mount. The magnetic head part includes a medium-opposing surface, a light source-opposing surface and a waveguide which guides laser light from the light source-opposing surface to the medium-opposing surface. The slider substrate includes a light source-cavity formed in a light source-placing surface on which the light source-unit is placed. The light source-cavity includes an opening concave part being formed larger than a mount bottom surface of the sub-mount. The mount bottom surface of the sub-mount is inserted into the opening concave part to be joined to the light source-cavity.
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公开(公告)号：US10566013B1
公开(公告)日：2020-02-18
申请号：US16250131
申请日：2019-01-17
发明人： Takashi Honda , Ryo Hosoi , Wah Chun Chan , Makoto Kawato , Dayu Zhou , Koji Shimazawa , Kowang Liu
IPC分类号： G11B11/105 , G11B5/012 , G11B5/00 , G11B5/31 , G11B5/60
摘要： A light source unit for thermally-assisted magnetic head includes a substrate member having a bonding surface, multiple layers formed on the bonding surface and comprising a base layer, a connection pad layer, an insulation layer and a bonding layer; a light source assembly attached on the bonding layer of the substrate member and having a laser diode embedded therein and connected to the connection pad layer on the bonding surface, so as to form a laser diode circuit; and a heater buried in the insulation layer and connected to the connection pad layer, so as to form a heater circuit. The light source unit can maintain stable heat power for facilitating performance of the thermally-assisted magnetic head, and further reduce the sizes of the light source unit and substrate member.
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公开(公告)号：US10061084B1
公开(公告)日：2018-08-28
申请号：US15445258
申请日：2017-02-28
发明人： Seiichi Takayama , Kiyohiko Abe , Ryuji Fujii , Takashi Honda , Shi Xiong Chen , Osamu Harakawa
摘要： 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.
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5.发明授权公开(公告)号：US09163939B2
公开(公告)日：2015-10-20
申请号：US14193337
申请日：2014-02-28
发明人： Seiichi Takayama , Ryuji Fujii , Takashi Honda , Osamu Harakawa , Tadatoshi Koba
CPC分类号： G01B11/272 , G11B5/127 , G11B5/1272 , G11B5/314 , G11B5/3173 , G11B5/4866 , G11B5/6088 , G11B9/12 , G11B13/08 , G11B2005/0021 , Y10T29/49036
摘要： 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.
摘要翻译： 制造热辅助磁头的方法包括提供包括激光二极管的光源单元; 提供反射板和光电检测器; 驱动激光二极管向反射板发射光束; 基于由反射板反射的光束的反射光，在光源单元和热辅助磁记录头部之间进行对准，然后通过光波导，最后通过光电检测器检测到获得最大功率 处于LED发射状态的激光二极管; 并且在对准完成之后将光源单元接合到滑块。 在它们之间的接合过程中，提高光源单元和滑块之间的对准精度，防止光源单元的激光二极管不稳定，并且最终提高热辅助磁头的性能。
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公开(公告)号：US10311903B2
公开(公告)日：2019-06-04
申请号：US15649961
申请日：2017-07-14
发明人： Seiichi Takayama , Takashi Honda , Ryuji Fujii , Ryo Hosoi , Kaichiu Cheung , Tsutomu Sasaki , Jingtao Lu , Fanglong Nie
摘要： A method of testing dynamic performances for a slider body of a thermally-assisted magnetic head includes: providing a slider body which is disconnected with a light source unit; removably mounting the slider body to a test head suspension assembly; keeping to provide a flat top beam to the slider body, the flat top beam being aligned with the optical waveguide, and a projection of an incident end of the optical waveguide being located within a light spot of the flat top beam; and testing the dynamic performance of the slider body. It can save the material cost and labor cost, and eliminate a precise optical alignment between an input light and an optical waveguide in the slider body to improve testing efficiency.
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7.发明授权公开(公告)号：US09437227B1
公开(公告)日：2016-09-06
申请号：US14870672
申请日：2015-09-30
发明人： Takashi Honda , Seiichi Takayama , Ryuji Fujii
CPC分类号： G11B5/4826 , G11B5/314 , G11B5/3173 , G11B5/4846 , G11B5/4853 , G11B5/6088 , G11B2005/0021
摘要： A thermally assisted magnetic recording head slider includes a light source unit having a light emitting element emitting laser light and a submount holding the light emitting element, and slider including a thin-film laminated part having a main magnetic pole layer, a near-field light generating element and an optical waveguide. A combination of the light emitting element and near-field light generating element is composed of a first pattern or second pattern. The light source unit is mounted on a light source placing surface so that a substrate surface of the light emitting element is orthogonal to a laminated surface of the thin-film laminated part. A plurality of electrode pads are formed on the outer end surface of the slider. The light source unit has a first element electrode and second element electrode. A first connecting wiring part and second connecting wiring part, which connected the first element electrode and second element electrode with a first electrode pad and second electrode pad, are formed on a light source placing surface.
摘要翻译： 热辅助磁记录头滑块包括具有发射激光的发光元件的光源单元和保持发光元件的基座，以及滑动器，其包括具有主磁极层的薄膜层叠部分，近场光 发光元件和光波导。 发光元件和近场光产生元件的组合由第一图案或第二图案组成。 光源单元安装在光源放置表面上，使得发光元件的基板表面与薄膜层叠部分的层叠表面正交。 在滑块的外端表面上形成多个电极焊盘。 光源单元具有第一元件电极和第二元件电极。 在第一电极焊盘和第二电极焊盘上形成有连接第一元件电极和第二元件电极的第一连接布线部分和第二连接布线部分在光源放置表面上。
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公开(公告)号：US08811130B1
公开(公告)日：2014-08-19
申请号：US14038160
申请日：2013-09-26
发明人： Seiichi Takayama , Ryuji Fujii , Osamu Harakawa , Hideki Tanzawa , Tadatoshi Koba , Takashi Honda
CPC分类号： G11B5/314 , G11B5/6088 , G11B2005/0021
摘要： 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.
摘要翻译： 制造热辅助磁头的方法包括将光源单元与滑块体上的热辅助磁头部对准; 以及在所述单元基板和所述滑块体之间进行接合，其间具有接合层。 并且所述接合处理包括用第一激光射击照射所述接合层，在所述第一激光射击之后暂停一段时间间隔，然后照射第二激光照射，其中所述第一激光照射的第一照射光强弱于第二激光照射 所述第二激光照射的照射功率和所述第一激光照射的第一照射时间比所述第二激光照射的第二照射时间短。 该方法可以在接合过程之后保持单元基板相对于滑块的精确对准，并且进而改善热辅助磁头的性能。
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9.发明授权公开(公告)号：US10510371B1
公开(公告)日：2019-12-17
申请号：US16282383
申请日：2019-02-22
发明人： Ryo Hosoi , Takashi Honda , Seiichi Takayama
IPC分类号： G11B11/105 , G11B13/08 , G11B5/00 , G11B5/31 , G11B5/60
摘要： A light source-unit comprises a laser diode, a sub-mount which the laser diode is joined, and a heater which is joined on a joint surface of the sub-mount. The sub-mount comprises a pair of barrier-members. The barrier-members are formed with lower thermal conductivity material which thermal conductivity is lower than joining metal which is used for joining the laser diode and the sub-mount. The barrier-members are formed on the joint surface so as to sandwich the heater.
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10.发明授权Light source unit, heat-assisted magnetic recording head using the same, and light source for light source unit 有权光源单元，使用其的热辅助磁记录头，以及光源单元的光源公开(公告)号：US09489972B2
公开(公告)日：2016-11-08
申请号：US14657436
申请日：2015-03-13
发明人： Takashi Honda , Seiichi Takayama , Ryuji Fujii , Koji Shimazawa , Tsuguki Noma , Yoshiteru Nagai
CPC分类号： G11B5/4866 , G01J1/4257 , G01J1/44 , G11B5/6088 , G11B2005/0021
摘要： A light source unit has a substrate, a light source that is mounted to the substrate. The light source includes; a first emission part that emits a forward light, the forward light being a laser light in an oscillation state; a second emission part that is located on a side opposite to the first emission part and that emits a rearward light, the rearward light being a laser light in an oscillation state; and a light leakage part located at a position different from the first emission part and the second emission part. The light source further includes a photodetector that is provided on the substrate, wherein the photodetector has a light receiving surface for detecting a leakage light that leaks from the light leakage part.
摘要翻译： 光源单元具有基板，安装在基板上的光源。 光源包括 第一发射部分，其发射向前的光，所述前向光是处于振荡状态的激光; 第二发射部分，其位于与第一发射部分相对的一侧，并且发射向后的光，所述后向光是处于振荡状态的激光; 以及位于与第一发射部分和第二发射部分不同的位置的漏光部分。 光源还包括设置在基板上的光电检测器，其中光电检测器具有用于检测从漏光部分泄漏的泄漏光的光接收表面。
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