| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 360317000 | Combined with inductive write head in piggyback/merged configuration | 10 |
| 20080253034 | Perpendicular magnetic write head, method of manufacturing the same, and magnetic write system - The present invention is directed to providing a perpendicular magnetic write head which can suppress unintended erasure of information written on a write medium at a non-writing time by optimizing a magnetic domain structure of main component elements that are engaged in writing operation. In the perpendicular magnetic write head, an auxiliary magnetic pole layer is disposed on a trailing or leading side of a main magnetic pole layer, the auxiliary magnetic pole layer being recessed from the main magnetic pole layer. When the main magnetic pole layer has a tensile stress as its internal stress, a nonmagnetic layer disposed in a layer same as the auxiliary magnetic pole layer and in an area in front of the auxiliary magnetic pole layer, also has a tensile stress as its internal stress. | 10-16-2008 |
| 20080291581 | Magnetic Recording And Reading Device - A magnetic recording and reading device includes a magnetic recording medium having at least one magnetic recording layer, a magnetic head enabling a data transfer rate of more than 50 MB/s and a recording density of more than 5 Gb/in | 11-27-2008 |
| 20080297952 | THIN-FILM MAGNETIC HEAD - To provide a thin-film magnetic head which suppresses PE while securing magnetic recording capability by controlling a domain of a leading end part of a main magnetic pole layer. | 12-04-2008 |
| 20090128964 | METHOD FOR MANUFACTURING A PERPENDICULAR MAGNETIC WRITE HEAD WITH WRAP AROUND MAGNETIC TRAILING AND SIDE SHIELDS - A method for manufacturing a magnetic write head having a wrap around magnetic shield. The method allows a highly accurate short wavelength such as 193 mm photolithography to be used to accurately define the placement and critical dimension of wrap around magnetic shield. The method includes the formation of a magnetic write pole, top gap, and side gap and the deposition of a RIEable fill layer thereover, and CMP to planarization. A 193 nm photolithography and ion milling is used to form a mask over the RIEable layer and one or more reactive ion etching processes are performed to pattern the RIEable layer through 193 nm photolithography mask. A wrap around shield can then be electroplated into the opening formed in the RIEable layer. | 05-21-2009 |
| 20090135528 | MAGNETIC READER WITH PIGGYBACKED FENCE - A magnetic head comprises a plurality of elements selected from a group consisting of readers and writers. A servo sensor is positioned towards the elements, the servo sensor being adapted for sensing a first servo track of a magnetic medium. A fence is positioned towards the servo sensor and aligned therewith in a tape travel direction. A magnetic head in another embodiment includes a substrate and a reader positioned above the substrate, the reader having a sensor and shields sandwiching the sensor. A fence is positioned towards the reader on an opposite side thereof from the substrate, the fence being aligned with the reader in a travel direction of a magnetic medium passing thereby. | 05-28-2009 |
| 20090161263 | Magnetic head and magnetic disk apparatus - Embodiments of the present invention provide a magnetic head for perpendicular magnetic recording, and a magnetic disk apparatus capable of preventing data erasure caused by alignment marks. In an embodiment, the magnetic head includes a head element including at least a main pole having a pole face on a flying surface and an auxiliary pole; alignment marks made of a magnetic material and used to detect the amount of lapping work when lapping the pole face of the main pole; and members made of a magnetic material, continuously extending in either direction with respect to the position of the main pole from within the alignment marks outward at least beyond the alignment marks. | 06-25-2009 |
| 20090213501 | Composite Thin-Film Magnetic Head, Magnetic Head Assembly And Magnetic Disk Drive Apparatus - A composite thin-film magnetic head includes a substrate; a first insulation layer laminated on the substrate; an MR read head element formed on the first insulation layer and provided with a lower shield layer, an upper shield layer and an MR layer in which a sense current flows in a direction perpendicular to a surface of the MR layer through the upper shield layer and the lower shield layer; a second insulation layer laminated on the MR read head element; an inductive write head element formed on the second insulation layer and provided with a lower magnetic pole layer, a recording gap layer, an upper magnetic pole layer whose end portion is opposed to an end portion of the lower magnetic pole layer through the recording gap layer and a write coil; and a nonmagnetic conductive layer electrically conducted with the lower shield layer and opposed to the substrate in order to increase substantially countered area between the lower shield layer and the substrate. | 08-27-2009 |
| 20090251827 | Recording head for reducing side track erasure - The present invention relates to a head having an air bearing surface for confronting the surface of a storage medium. The head includes a first pole that is spaced apart from a second pole. At least one non-magnetic spacer is positioned between the first pole and the second pole such that the first pole is magnetically decoupled from the second pole. In a further aspect, one or both of the first pole and the second pole can be elliptical in shape. | 10-08-2009 |
| 20130342937 | PERPENDICULAR MAGNETIC RECORDING HEAD HAVING A MAIN POLE AND A SUB-POLE - A magnetic write head having a main magnetic write pole and a magnetic sub-pole that are configured to maximize magnetic performance. The main magnetic write pole has a flared portion located near the air bearing surface and a non-flared portion removed from the air bearing surface. A magnetic sub-pole is formed adjacent to the main magnetic write pole and terminates at a front endpoint that is recessed from the air bearing surface but is closer to the air bearing surface than the non-flared portion. | 12-26-2013 |
| 20150371670 | DUAL READER STRUCTURE - Implementations described and claimed herein provide a stacked dual reader with a bottom sensor stack and a top sensor stack separated by a top mid-shield and a bottom mid-shield, and a pre-amplifier circuit comprising a top lead connected to the top mid-shield, configured to collect current flowing from the top mid-shield through the top sensor stack opposite a direction of current flowing from the bottom mid-shield to a bottom lead through the bottom sensor stack. | 12-24-2015 |
