公开(公告)号：US20240203449A1

公开(公告)日：2024-06-20

申请号：US18447419

申请日：2023-08-10

申请人： Western Digital Technologies, Inc.

发明人： John T. Contreras ,  Howard Gordon Zolla ,  Yunfei Ding ,  Joey M. Poss

IPC分类号： G11B5/012

CPC分类号： G11B5/012 ,  G11B2005/001

摘要： Various illustrative aspects are directed to a data storage device comprising a disk and a read/write head configured to read data from and write data to the disk. The read/write head comprises a write pole tip and a transducer configured near the write pole tip. One or more processing devices are mounted on or near the read/write head and generate an AC current that is applied to the transducer to cause the transducer to generate a high frequency auxiliary field that is applied to the disk. The one or more processing devices may be an RF source IC mounted on or near a slider on which the read/write head is integrated or mounted.

公开(公告)号：US12094499B1

公开(公告)日：2024-09-17

申请号：US18349803

申请日：2023-07-10

申请人： Western Digital Technologies, Inc.

发明人： Howard Gordon Zolla ,  Rong Cao

IPC分类号： G11B5/39 ,  G11B5/11 ,  G11B5/31 ,  G11B5/10

CPC分类号： G11B5/3909 ,  G11B5/112 ,  G11B5/3912 ,  G11B5/3932 ,  G11B5/102 ,  G11B5/3163 ,  G11B5/3954

摘要： The present disclosure generally relates to a dual free layer (DFL) read head. In one embodiment, a dual free layer (DFL) read head, comprising: a tunnel magneto resistance (TMR) sensor disposed at a media facing surface (MFS); soft bias (SB) side shields disposed adjacent to the TMR sensor at the MFS; and a rear soft bias (RSB) disposed adjacent to the TMR sensor recessed from the MFS. The RSB has a nonmagnetic cap, the nonmagnetic cap comprising: a first nonmagnetic cap layer; and a second nonmagnetic cap layer, wherein an etch selectivity of the first nonmagnetic cap layer to the second nonmagnetic cap layer is a ratio of a:b in a first chemistry and a ratio of x:y in a second chemistry, wherein a is greater than b, and y is greater than x, and the second nonmagnetic cap layer is disposed on the first nonmagnetic cap layer.

公开(公告)号：US09837106B1

公开(公告)日：2017-12-05

申请号：US15614454

申请日：2017-06-05

申请人： Western Digital Technologies, Inc.

发明人： John Thomas Contreras ,  Howard Gordon Zolla

IPC分类号： G11B5/60 ,  G11B5/48 ,  G11B5/39 ,  G11B5/012 ,  G11B5/02 ,  G11B5/55 ,  G11B20/10

CPC分类号： G11B5/5539 ,  G11B5/012 ,  G11B5/02 ,  G11B5/3912 ,  G11B5/3948 ,  G11B5/3974 ,  G11B5/3977 ,  G11B5/4886

摘要： A two-dimensional magnetic recording (TDMR) disk drive has a gas-bearing slider that includes first and second sensors with a first cross-track spacing electrically coupled to a first magnetic shield, and third and fourth sensors with a different cross-track spacing electrically coupled to a second magnetic shield. The different spacings results in the first and third sensors and the second and fourth sensors having a cross-track spacing to accommodate for the effect of head skew. Each sensor is connected to an associated amplifier by a suspension trace and a common trace connected to its associated shield. Switching circuitry selects either the first and third amplifiers or the second and fourth amplifiers as the active pair depending on the radial location where the data is to be read. Thus the appropriate pair of sensors are aligned with the data tracks despite the presence of high head skew.