公开(公告)号：US20220189507A1

公开(公告)日：2022-06-16

申请号：US17684133

申请日：2022-03-01

申请人： Western Digital Technologies, Inc.

发明人： Barry C. STIPE ,  Takuya MATSUMOTO ,  Sergei SOCHAVA

IPC分类号： G11B5/60 ,  G11B5/31

摘要： The present disclosure relates to pretreating a magnetic recording head for magnetic media drive. For a heat assisted magnetic recording (HAMR) head, a light source provides the necessary heat for the drive to operation. A vertical cavity surface emitting laser (VCSEL) is mounted to a top surface of a slider. A plurality of laser beams are emitted from the bottom surface of the VCSEL and directed to a corresponding number of waveguide structures within the HAMR head. The waveguide structures feed into a multimode interference (MMI) device that then directs the laser into a single waveguide for focusing on a near field transducer (NFT). The VCSEL lasers are phase coherent and have no mode hopping.

公开(公告)号：US20220358964A1

公开(公告)日：2022-11-10

申请号：US17869991

申请日：2022-07-21

申请人： Western Digital Technologies, Inc.

发明人： Takuya MATSUMOTO ,  Muhammad ASIF BASHIR ,  Hamid BALAMANE ,  Petrus Antonius VAN DER HEIJDEN ,  Barry C. STIPE

IPC分类号： G11B11/105 ,  G11B11/24 ,  G11B5/21

摘要： A heat-assisted magnetic recording (HAMR) head for recording data in data tracks of a HAMR disk has a gas-bearing slider that supports a near-field transducer (NFT) and a main magnetic pole formed of two layers. The first main pole layer has a cross-track width at the slider's gas-bearing surface (GBS) that tapers down in the direction towards the NFT where the optical spot is formed. The second main pole layer is located away from the NFT and has a substantially wider cross-track width than the first main pole layer so as to provide sufficient magnetic field for writing. Layers of heat sink material are located on the sloped cross-track sides of the tapered first main pole layer to reduce the temperature and thus the likelihood of oxidation of the main pole layers.

公开(公告)号：US20220407287A1

公开(公告)日：2022-12-22

申请号：US17591414

申请日：2022-02-02

申请人： Western Digital Technologies, Inc.

发明人： Takuya MATSUMOTO ,  Barry C. STIPE

IPC分类号： H01S5/02 ,  H01S5/0237 ,  H01S5/042 ,  H01S5/183

摘要： Embodiments of the present disclosure generally relate to a vertical cavity surface emitting laser (VCSEL), a head gimbal assembly for mounting a VCSEL, devices incorporating such articles, and to a process for forming a VCSEL. In an embodiment, a process for forming a VCSEL device is provided. The process includes forming a trench in a substrate, forming two laser diode electrodes in the trench, and after forming the two laser diode electrodes, cutting the substrate along the trench to form a VCSEL, the VCSEL comprising a chip for mounting on a slider, the chip having six surfaces, wherein a first surface of the chip is for facing the slider, a second surface of the chip is opposite the first surface, the two laser diode electrodes being positioned in any combination on one or more of a third surface, a fourth surface, a fifth surface, or a sixth surface.

公开(公告)号：US20220189508A1

公开(公告)日：2022-06-16

申请号：US17684139

申请日：2022-03-01

申请人： Western Digital Technologies, Inc.

发明人： Barry C. STIPE ,  Takuya MATSUMOTO ,  Sergei SOCHAVA

IPC分类号： G11B5/60 ,  G11B5/31

摘要： The present disclosure relates to pretreating a magnetic recording head for magnetic media drive. For a heat assisted magnetic recording (HAMR) head, a light source provides the necessary heat for the drive to operation. A vertical cavity surface emitting laser (VCSEL) is mounted to a top surface of a slider. A plurality of laser beams are emitted from the bottom surface of the VCSEL and directed to a corresponding number of waveguide structures within the HAMR head. The waveguide structures feed into a multimode interference (MMI) device that then directs the laser into a single waveguide for focusing on a near field transducer (NFT). The VCSEL lasers are phase coherent and have no mode hopping.

公开(公告)号：US20220407288A1

公开(公告)日：2022-12-22

申请号：US17839172

申请日：2022-06-13

申请人： Western Digital Technologies, Inc.

发明人： Takuya MATSUMOTO ,  Barry C. STIPE

IPC分类号： H01S5/0233 ,  H01S5/042 ,  G11B13/08

摘要： Embodiments of the present disclosure generally relate to a vertical cavity surface emitting laser (VCSEL), a head gimbal assembly for mounting a VCSEL, devices incorporating such articles, and to a process for forming a VCSEL. In an embodiment, a VCSEL device provided. The VCSEL device includes a chip for mounting on a slider, the chip having a plurality of surfaces and a notch, the plurality of surfaces comprising: a bottom surface for facing the slider; a top surface opposite the bottom surface; and a plurality of side surfaces, wherein the notch forms a recessed edge spaced away from the bottom surface and toward the top surface, the notch having a shoulder, a side, and an angle (θ1) between the shoulder and the side. The VCSEL device further includes two laser diode electrodes positioned in any combination on one or more of the plurality of surfaces of the chip.