| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 360122000 | Head surface structure | 58 |
| 20080204930 | Perpendicular recording head with a grooved yoke - Disclosed is a perpendicular recording head for a hard disk drive. The perpendicular recording head includes a yoke that has a plurality of grooves essentially perpendicular to a magnetic flux that flows in a vertical direction relative to the yoke. The perpendicular grooves inhibit residual magnetism in the vertical direction and enhance yoke domain stability | 08-28-2008 |
| 20080231992 | Metal oxynitride adhesion/corrosion barrier layer and a diamond-like carbon overcoat - A method for forming a protective bilayer on a magnetic read/write head or magnetic disk. The bilayer is formed as an adhesion enhancing and corrosion resistant underlayer and a protective diamond-like carbon (DLC) overlayer. The underlayer is formed of transition metal oxynitride, having the general formula MeO | 09-25-2008 |
| 20080247086 | Method for forming interleaved coils with damascene plating - A method of forming interleaved coils of a write head is disclosed using a combination of non-damascene and damascene processes. | 10-09-2008 |
| 20080247087 | Magnetic head for perpendicular magnetic recording and method of manufacturing same, the magnetic head incuding pole layer and two shields sandwiching the pole layer - A magnetic head incorporates: a medium facing surface; a coil; a pole layer; first and second shields disposed to sandwich the pole layer therebetween; a first gap layer disposed between the first shield and the pole layer; a second gap layer disposed between the second shield and the pole layer; and a substrate. The first shield is located closer to the substrate than the second shield. The first shield has a first layer and a second layer disposed between the first layer and the first gap layer. | 10-09-2008 |
| 20080253021 | Non-magnetic contact enhancement feature - A transducer having an external contact surface includes a writer and a contact member. The writer has a portion extendable beyond the external contact surface. The contact member surrounds at least a portion of the extendable writer portion. | 10-16-2008 |
| 20080253022 | MAGNETIC WRITE TRANSDUCER - A magnetic write transducer includes a yoke having a lower pole portion, an upper pole portion, and a First bobbin portion; a first coil turn wrapped around the first bobbin portion of the yoke in a first plane; a second coil turn wrapped around the first bobbin portion of the yoke in a second plane above the first plane; a third coil turn wrapped around the First bobbin portion of the yoke in a third plane above the second plane; and a fourth coil turn wrapped around the first bobbin portion of the yoke in a fourth plane above the third plane. | 10-16-2008 |
| 20080259494 | FLAT PROFILE TAPE HEAD - A magnetic head according to one embodiment includes a first module having a tape bearing surface; a second module having a tape bearing surface; and a third module having a tape bearing surface, the third module being positioned on an opposite side of the second module than the first module, wherein the tape bearing surface of the first module is substantially parallel to a tape oriented at a desired wrap angle relative to the tape bearing surface of the second module at an edge of the tape bearing surface of the second module closest to the first module, wherein writing and reading functions are performed by different modules at a given time. | 10-23-2008 |
| 20080278854 | MAGNETIC HEAD WITH WEAR RESISTANT PORTION NEAR OVERCOAT - A magnetic head according to one embodiment includes a substrate; at least one transducer formed above the substrate, the at least one transducer being selected from a group consisting of a reader and a writer; an overcoat portion formed above the at least one transducer; and a wear resistant portion formed between the overcoat portion and a media-proximal surface of the magnetic head, the wear resistant portion being formed of a material having a greater resistance to media wear than a material from which the overcoat portion is formed. | 11-13-2008 |
| 20080285173 | HYBRID COATING FOR MAGNETIC HEADS - A system and method for providing corrosion protection for a magnetic read/write head is disclosed. A monolayer surface coating is applied to cover those portions of the under layer of a magnetic read/write head not already covered by a previously applied diamond-like coating. This allows for a thinner diamond like coating than previously applied in the art. The monolayer surface coating can be a self-assembled monolayer, such as an organosilicon for hydroxylated surfaces or carboxylic acids for aluminum or other metal oxides. Alternatively, the monolayer surface coating can be directly applied to the under layer with no diamond-like coating being present. The monolayer surface coating can be applied by a surface immersion process or by a vacuum coating process. | 11-20-2008 |
| 20080291570 | High performance computer hard disk drive and method - A high performance hard disk drive is disclosed in which a flying read/write head runs in contact or in near contact with a rotating platter. In this design there is no wear of the hard disk platter or flying head due to both head and platter being coated with an amorphous carbon that has an exceptionally low coefficient of friction in a sealed, inert gas environment. The overcoat contains carbon in the range between about 52 and 80 atomic percent and hydrogen in the range between about 20 to 48 atomic percent. There is no lubricant required in this design, which eliminates a significant cause of hard drive failure from oxidation of the lubricant, stiction and rippling of the lubricant. This contact method achieves a high areal density with no wear, within a robust, hermetically sealed environment. | 11-27-2008 |
| 20090021861 | Magnetic write device including an encapsulated wire for assisted writing - A magnetic device includes a write element having a write element tip and is operable to generate a first field at the write element tip. A conductor is proximate the write element tip for carrying a current to generate a second field that augments the first field. An encapsulating layer is on at least one surface of the conductor, wherein the encapsulating layer is made of a material that increases a maximum sustainable current density of the conductor to greater than about 10 | 01-22-2009 |
| 20090021862 | ELECTRIC FIELD READ/WRITE HEAD, METHOD OF MANUFACTURING THE SAME, AND INFORMATION STORAGE DEVICE COMPRISING THE ELECTRIC FIELD READ/WRITE HEAD - An electric field read/write head, a method of manufacturing the same, and an information storage device including the electric field read/write head are provided. The electric field read/write head includes: a resistance region formed in a substrate which comprises an end surface facing a recording medium; a source and a drain formed in the substrate and disposed on both sides of the resistance region, respectively; and an insulating layer and a write electrode formed sequentially on the resistance region, wherein the length (l) to width (w) ratio (l/w) of the resistance region satisfies (l/w)≧0.2. | 01-22-2009 |
| 20090034120 | ELECTRIC FIELD READ/WRITE HEAD, METHOD OF MANUFACTURING THE SAME, AND INFORMATION STORAGE DEVICE COMPRISING ELECTRIC FIELD READ/WRITE HEAD - An electric field read/write head, a method of manufacturing the electric field read/write head, and an information storage device including the electric field read/write head are provided. The electric field read/write head includes: a substrate having a first surface facing a recording medium and a second surface that is perpendicular to the first surface; and a protrusion formed on the second surface and having at least a portion facing the recording medium, wherein a resistance sensor comprising a source, a drain, and a channel is included in the protrusion. An insulating layer and electric field shield layers are further sequentially formed on opposite sides of the protrusion, respectively, and at least one of the electric field shield layers is a write electrode. | 02-05-2009 |
| 20090040655 | Thin-film magnetic head structure, method of manufacturing the same, and thin-film magnetic head - A method of manufacturing a thin-film magnetic head structure comprises the steps of preparing an insulating layer | 02-12-2009 |
| 20090059423 | Magnetic recording head and magnetic recording apparatus - A magnetic recording head includes: a main magnetic pole; a laminated body; and a pair of electrodes operable to pass a current through the laminated body. The laminated body includes a first magnetic layer, a second magnetic layer, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. A lamination direction of the laminated body is substantially parallel to a medium moving direction. In a first direction parallel to an air bearing surface and perpendicular to the lamination direction, the laminated body has a protruding portion that protrudes beyond an end of a surface of the main magnetic pole facing the laminated body. | 03-05-2009 |
| 20090080109 | Magnetic recording device - A magnetic recording device includes: a magnetic recording medium containing a plurality of recording layers; a magnetic recording head for conducting magnetic writing of information in the magnetic recording medium; and a magnetic reproducing head for conducting magnetic reading out of the information from the magnetic recording medium; wherein the magnetic recording head includes a high frequency oscillator for magnetically assisting the magnetic writing of the information so as to change a magnetization of at least one of the plurality of recording layers of the magnetic recording medium, thereby recording a plurality of information different from one another in the magnetic recording medium commensurate with a total amount of magnetization of the plurality of recording layers. | 03-26-2009 |
| 20090109569 | APPARATUS, SYSTEM, AND METHOD FOR GUIDED GROWTH OF PATTERNED MEDIA USING MONODISPERSE NANOSPHERES - An apparatus, system, and method are disclosed for guided growth of patterned media using monodisperse nanospheres. The apparatus includes nanoscale features extending from a substrate. The nanoscale features may be formed using electron-beam lithography and have a non-uniform cap. A spherical cap is formed on the non-uniform cap by hydrolysis and precipitation of monodisperse nanospheres on an immobilized nucleation site, the immobilized nucleation site attached with one end of the nanoscale feature. The system includes the apparatus and further includes monodisperse nanospheres formed of silicon dioxide spheres. The method includes providing a substrate, etching at least one nanoscale feature extending from the substrate, the feature formed using electron-beam lithography and having a non-uniform cap, forming an immobilized nucleation site, and forming a spherical cap by hydrolysis and precipitation of monodisperse nanospheres on the immobilized nucleation site, the immobilized nucleation site attached with one end of the nanoscale feature. | 04-30-2009 |
| 20090147400 | Magnetic head for perpendicular magnetic recording - A magnetic head comprises a pole layer, a shield layer, a gap layer disposed between the pole layer and the shield layer, and a coil. The shield layer incorporates: a first layer disposed on the gap layer; a second layer disposed on the first layer; and a third layer disposed on the second layer. The first layer has an end face located in a medium facing surface. An end face of each of the second and third layers closer to the medium facing surface is located at a distance from the medium facing surface. A first nonmagnetic layer is disposed around the first layer. A second nonmagnetic layer is disposed between the medium facing surface and the end face of the second layer closer to the medium facing surface. | 06-11-2009 |
| 20090161256 | Multiple writing process for magnetic bit-patterned media - Two pass writing system and method for patterned media. In a first step, a write head of a hard disk drive writes with a strong write field. In a second step, a write head of the hard disk drive writes with a weak field. In this manner, magnetic islands of patterned media are written in the first step. In the second step, only those magnetic islands with a low switching field are written. | 06-25-2009 |
| 20090219649 | PERPENDICULAR MAGNETIC WRITE HEAD HAVING A NOVEL TRAILING RETURN POLE FOR REDUCED WIDE-AREA-TRACK-ERASURE - A magnetic write head having a magnetic return pole that is configured to prevent wide area track erasure. The magnetic return pole has a throat region with a relatively narrow width and has a inner and outer wing portions formed near the air bearing surface. The inner wing portion has a front edge that is disposed at the air bearing surface, whereas the outer wing portion has a front edge that is recessed from the air bearing surface. | 09-03-2009 |
| 20090251822 | MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING APPARATUS - A magnetic recording medium includes a plurality of recording tracks formed of a magnetic material and a non-magnetic area arranged between the recording tracks to separate each recording track. The non-magnetic area is formed of a non-magnetic material, which can accumulate and retain electric charges. The electric charges accumulated in the non-magnetic area represent servo information. | 10-08-2009 |
| 20090273858 | SUBSTRATE FOR MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - It is possible to improve the recording and reproducing S/N ratio, the reproduction signal intensity, and the degree of high density recording. There are provided a plurality of recording tracks formed on a substrate, each recording track being formed of a magnetic material, and non-recording sections formed on the substrate, each non-recording section separating adjacent recording tracks, each recording track including a plurality of recording sections and connecting sections for connecting the recording sections adjacent thereto in a track longitudinal direction, and each connecting section having a cross-sectional area in a track width direction that is smaller than a cross-sectional area in a track width direction of adjacent recording sections. | 11-05-2009 |
| 20090323219 | MAGNETIC RECORDING MEDIUM, METHOD FOR PRODUCTION THEREOF AND MAGNETIC RECORDING AND REPRODUCING DEVICE - A method for the production of a magnetic recording medium ( | 12-31-2009 |
| 20100002336 | METHODS OF PRODUCING READ SENSORS WITH IMPROVED ORIENTATION OF THE HARD BIAS LAYER AND SYSTEMS THEREOF - A system in one embodiment includes a magnetic sensor having a free magnetic layer, a nanocrystalline seed layer formed on an insulative amorphous material; a chromium-containing underlayer formed on the seed layer; and a hard bias layer formed on the underlayer and separated from the sensor by the insulative amorphous material. A method according to a further embodiment includes forming an amorphous insulative layer encapsulating a sensor stack; forming a nanocrystalline seed layer on the amorphous insulative material; forming a chromium-containing underlayer on the seed layer; and forming a hard bias layer on the underlayer. Additional systems and methods are presented. | 01-07-2010 |
| 20100007988 | MAGNETIC RECORDING MEDIUM AND INFORMATION STORAGE APPARATUS - A magnetic recording medium includes a nonmagnetic granular layer that has a granular structure in which a plurality of nonmagnetic grains made of a nonmagnetic material are separated from one another by a Cr oxide. The magnetic recording medium further includes a magnetic granular layer that is formed on the nonmagnetic granular layer and has a granular structure in which a plurality of magnetic grains made of a magnetic material are separated from one another by a nonmagnetic material. | 01-14-2010 |
| 20100053812 | MAGNETIC HEAD FOR RECORDING MAGNETIC DATA BY CHANGING THE MAGNETIZATION DIRECTION OF A MAGNETIC RECORDING LAYER OF A MAGNETIC MEDIUM - According to one embodiment, a magnetic head for recording magnetic data by changing the magnetization direction of a magnetic recording layer of a magnetic medium comprises a magnetic pole for generating a magnetic field to change the magnetization direction of the magnetic recording layer, and a facing electrode pair for generating an electromagnetic field and applying energy to the magnetic recording layer to assist the change of the magnetization direction of the magnetic recording layer caused by the magnetic field from the magnetic pole. Other embodiments are also presented. | 03-04-2010 |
| 20100097720 | MAGNETIC RECORDING/REPRODUCING APPARATUS AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a magnetic recording/reproducing apparatus includes a magnetic head and a magnetic recording medium. The magnetic recording medium includes a recording layer formed of a hard magnetic layer and a soft magnetic layer. The hard magnetic layer has a bit width corresponding to a length of a bit island in a radial direction of the magnetic recording medium. The soft magnetic layer is arranged on the hard magnetic layer. The soft magnetic layer has a width smaller than the bit width and is arranged at a position displaced in a direction away from an off-track portion of the leading edge of the magnetic head skewed at an angle. | 04-22-2010 |
| 20100118438 | THIN-FILM MAGNETIC HEAD, METHOD OF MANUFACTURING THE SAME, HEAD GIMBAL ASSEMBLY AND HARD DISK DRIVE - A thin-film magnetic head is manufactured as follows. First, a base insulating layer having a magnetic pole forming depression sunken into a form corresponding to the main magnetic pole layer is formed, a stop film for CMP is formed such as to fill the magnetic pole forming depression, and then a magnetic layer is formed on the stop film. Next, the magnetic layer is separated by forming a separation groove substantially surrounding the magnetic pole forming depression on the outside thereof, and thus separated magnetic layer is formed with a cover insulating film adapted to cover the whole upper face. The surface is polished by CMP until the stop film is exposed, so that the part of magnetic layer remaining on the inside of the magnetic pole forming depression is used as the main magnetic pole layer. Further, a recording gap layer, a write shield layer, and a thin-film coil are formed. | 05-13-2010 |
| 20100157470 | METHODS FOR CREATING SLANTED PERPENDICULAR MAGNETIC POLE VIA METAL LIFTOFF - A method in one embodiment includes forming a resist structure above an upper surface of a substrate, wherein a portion of the upper surface of the substrate is a shaping layer, wherein the resist structure has an undercut; depositing a layer of magnetic material above exposed regions of the substrate, wherein a portion of the layer of magnetic material tapers towards the substrate as it approaches the undercut; removing the resist structure; and forming a write pole above the layer of magnetic material. Additional methods are disclosed. | 06-24-2010 |
| 20100172053 | Novel hard bias design for extra high density recording - A hard bias structure for biasing a free layer in a MR element within a read head is comprised of a composite hard bias layer having a Co | 07-08-2010 |
| 20100315741 | Perpendicular magnetic recording head - A perpendicular magnetic write head capable of suppressing damage and corrosion of a magnetic pole to secure a stable writing performance is provided. | 12-16-2010 |
| 20110019309 | MAGNETIC HEAD HAVING A STEPPED OR SEGMENTED WRAP AROUND SHIELD AND METHODS OF FORMATION THEREOF - According to one embodiment, a system comprises a magnetic pole having a media-facing end and a wrap around shield spaced from the magnetic pole, wherein the wrap around shield has a media-facing end positioned along three sides of the media-facing end of the magnetic pole and has inner, second, and middle regions separated by transitional regions. The inner region is closest to the media facing end of the magnetic pole, the second region is farthest from the media facing end of the magnetic pole, and the middle region is between the inner and second regions. A cross-sectional height of the inner region measured perpendicularly to the wrap around shield's media-facing end is less than a cross-sectional height of the second region, and a cross-sectional height of the middle region is greater than the cross-sectional height of the inner region and less than the cross-sectional height of the second region. | 01-27-2011 |
| 20110032640 | MULTI-LAYER, THIN FILM OVERCOAT FOR MAGNETIC MEDIA DISK - A thin film magnetic disk overcoat for perpendicular magnetic recording media comprises three layers. The initial layer comprises a dense mixture of both SiC | 02-10-2011 |
| 20110038079 | PERPENDICULAR RECORDING MEDIA WITH SUBLAYERS OF OXIDE DOPANT MAGNETIC MATERIALS - Perpendicular recording media with sublayers of dual oxide dopant magnetic materials are disclosed. The magnetic layer may comprise multiple sublayers of magnetic materials. In each sublayer, dual oxide dopants are incorporated. The compositions of the sublayers can be the same or different depending on the application. The magnetic layer may be deposited using a target comprising a mixture of CoPtCrB and dual oxides as dopants. The layer deposited with such targets can be the entire magnetic layer or a sublayer. | 02-17-2011 |
| 20110058277 | ASYMMETRIC WRITER FOR SHINGLED MAGNETIC RECORDING - In one embodiment, a system includes a writer for shingled recording which includes a write pole having a trailing edge and first and second side edges extending from the trailing edge. The writer further includes a shield extending along and about parallel to only a portion of the trailing edge or only a portion of the first side edge, and the shield does not extend along the second side edge. In addition, an angle formed between the first side edge and the trailing edge along an air bearing surface side of the writer is different than an angle formed between the second side edge and the trailing edge along the air bearing surface side of the writer. Other systems are also presented which include advanced shingled writing head designs. | 03-10-2011 |
| 20110063754 | Perpendicular magnetic write head - A perpendicular magnetic write head in which unintended erasure of information at the time of non-writing can be suppressed while keeping the capability of writing is provided. The perpendicular magnetic write head includes a magnetic pole tip portion, a first yoke portion connected to the magnetic pole tip portion, having a width larger than that of the magnetic pole tip portion, and having a recess portion in a center region thereof, and a second yoke portion embedded in the recess portion. The magnetic pole tip portion and the first yoke portion are integrally formed with a vapor deposition method, and the second yoke portion is formed with a plating method. Since the saturation flux density of the magnetic pole tip portion formed with the vapor deposition method becomes higher than that of the yoke portion, a magnetic flux intake capacity of the magnetic pole tip portion is ensured. In a magnetic domain structure of the yoke portion most of which is formed with the plating method, since an easy magnetization axis becomes likely to be directed in a direction perpendicular to an emitting direction of a magnetic flux, residual flux becomes less likely to leak out of the main magnetic pole layer at the time of non-writing. | 03-17-2011 |
| 20110116190 | Optimized write pole flare angle for side shield or semi side shield PMR writer application - Improved writability and a reduction in adjacent track erasure are achieved in a PMR writer with a large flare angle of 45 and 90 degrees in the main write pole and a full side shield or partial side shield configuration around the narrow write pole section and write pole tip. A trailing shield is formed above the write pole's top surface and a full or partial side shield section is spaced a certain distance from each side of the write pole. The partial side shield has a thickness less than that of the write pole and a top or bottom surface about coplanar with the pole tip's top or bottom edge, respectively. The partial side shield may include two sections on each side of the write pole wherein the bottom surface of a top section is separated by a certain distance from the top surface of a bottom section. | 05-19-2011 |
| 20110205667 | MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING/REPRODUCING APPARATUS USING THE SAME - A magnetic recording head includes a magnetic pole, a spin torque oscillator, a first shield and a second shield. The magnetic pole has an air-bearing surface. The spin torque oscillator is provided so that a first side of the spin torque oscillator faces the magnetic pole in a first direction parallel to the air-bearing surface. The first shield includes a granular magnetic material, and is provided so that two portions of the first shield sandwich the spin torque oscillator in a second direction which is parallel to the air-bearing surface and perpendicular to the first direction. The second shield is provided on a second side of the spin torque oscillator opposite to the first side. | 08-25-2011 |
| 20110249364 | PMR writer with seamless shields and method of making it - A process (and the structure resulting therefrom) is described for manufacturing a magnetic write head in which there is no physical interface between the first and second trailing shields. This is achieved by the introduction of a sacrificial layer immediately after the top yoke plating has been done and its photoresist mold has been stripped. | 10-13-2011 |
| 20110255192 | THIN FILM MAGNETIC TAPE HEAD - A magnetic tape head includes a writing element having a coil for generating magnetic flux and a yoke part that emits magnetic flux induced by the coil from a tape bearing surface opposite a magnetic tape, a substrate where the writing element is formed, and a closure joined with the substrate. A gap formed at a portion between the substrate and the closure exists from the yoke part in a direction orthogonal to a junction surface between the substrate and the closure. | 10-20-2011 |
| 20110261485 | MAGNETIC WRITE HEAD HAVING A WRAP AROUND TRAILING SHIELD WITH AN ASYMETRICAL SIDE GAP - A magnetic write head having a magnetic write pole with a wrap around magnetic trailing shield. The wrap around magnetic trailing shield is separated by a first non-magnetic side gap at a first side of the write pole and by a second non-magnetic side gap at a second side of the write pole. The first second non-magnetic side gap is larger than the first non-magnetic side gap and is preferably at least twice the thickness of the first non-magnetic side gap. This design provides additional protection adjacent track interference at one side of the write pole and additional protection against magnetic write field loss at the other side of the write pole. | 10-27-2011 |
| 20110261486 | Perpendicular magnetic recording head with a bottom side shield - A perpendicular magnetic recording (PMR) head has a pole tip shielded laterally by a separated pair of bottom side shields and shielded from above by an upper shield. The bottom side shields surround a lower portion of the pole tip while the upper portion of the pole tip is surrounded by non-magnetic layers. The bottom shields and the non-magnetic layer form a wedge-shaped trench in which the pole tip has been formed by a self-aligned plating process. A write gap layer and an upper shield is formed above the side shields and pole. The resulting structure substantially eliminates track overwrite while maintaining good track definition. | 10-27-2011 |
| 20110273796 | Magnetic Write Head with Flux Diverting Structure - A magnetic write head with a flux diverting structure for diverting stray flux received from an external source. The write head includes a yoke with two poles and a non-magnetic gap formed there between, and functions to write data to a magnetic storage medium. The flux diverting structure is proximate to the first pole and has a magnetic connection toward the back of the structure, and a non-magnetic separation toward the front of the structure. The flux diverting structure is comprised of a magnetic permeable material such that stray flux is diverted away from portions of the write head. | 11-10-2011 |
| 20110279926 | METHOD AND SYSTEM FOR PROVIDING A PERPENDICULAR MAGNETIC RECORDING TRANSDUCER USING A LOW ENERGY MILL - A method and system for fabricating magnetic transducer are described. The method and system include providing a main pole having a bottom and a top wider than the bottom. The method and system further include performing a high energy ion mill at an angle from a normal to the top of the main pole and at a first energy. The high energy ion mill removes a portion of the top of the main pole and exposes a top bevel surface for the main pole. The method and system also include performing a low energy ion mill at second energy and a glancing angle from the top bevel surface. The glancing angle is not more than fifteen degrees. The second energy is less than the first energy. The method and system also include depositing a nonmagnetic gap. | 11-17-2011 |
| 20120140358 | MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING WITH SHIELD AROUND MAIN MAGNETIC POLE - A magnetic head includes a main magnetic pole, a shield having an end face located in a medium facing surface to wrap around an end face of the main magnetic pole, and a gap part provided between the main magnetic pole and the shield. The shield includes a bottom shield, two side shields, and a top shield. The gap part includes first and second gap layers. In a manufacturing method of the magnetic head, a mold is formed on the top surface of the bottom shield, the mold having a shape determined by photolithography and being intended to be removed later. Next, the two side shields are formed on the top surface of the bottom shield by performing plating without forming a seed layer. Next, the mold is removed and then the first gap layer, the main magnetic pole, the second gap layer, and the top shield are formed in succession. | 06-07-2012 |
| 20120154951 | METHOD FOR MANUFACTURING A PERPENDICULAR MAGNETIC WRITE POLE HAVING A WRITE POLE AND TRAILING SHIELD WITH A TAPERED TRAILING GAP - A method for manufacturing a magnetic write head having a that has a write pole with a tapered trailing edge in a pole tip region, and a trailing shield that has a leading edge that tapers away from the write pole at an angle that is greater than that taper angle of the trailing edge of the write pole. The magnetic head has a step feature with a front edge that is recessed from the ABS. In one embodiment a magnetic wedge is formed over the tapered surface of the write pole. In another embodiment, a non-magnetic bump is formed over a first tapered portion of the write pole adjacent to the front edge of the step feature, and a non-magnetic wedge is formed over a second tapered portion of the write pole and extends from the non-magnetic bump to the air bearing surface. | 06-21-2012 |
| 20120281313 | Perpendicular Shield Pole Writer with Tapered Main Pole and Tapered Non-Magnetic Top Shaping Layer - A PMR writer with a tapered main pole layer and tapered non-magnetic top-shaping layer is disclosed that minimizes trailing shield saturation. A second non-magnetic top shaping layer may be employed to reduce the effective TH size while the bulk of the trailing shield is thicker to allow a larger process window for back end processing. A sloped surface with one end at the ABS and a second end 0.05 to 0.3 microns from the ABS is formed at a 10 to 80 degree angle to the ABS and includes a sloped surface on the upper portion of the main pole layer and on the non-magnetic top shaping layer. An end is formed on the second non-magnetic top shaping layer at the second end of the sloped surface followed by forming a conformal write gap layer and then depositing the trailing shield on the write gap layer and along the ABS. | 11-08-2012 |
| 20120327535 | Chamfered Magnetic Write Pole - A write pole can have a magnetically conductive pole tip has at least one corner. The at least one corner may be chamfered to limit magnetic saturation of the conductive pole tip. The conductive pole tip can have one or more beveled surface that has a chamfered corner which extends a predetermined distance along an edge of the write pole. | 12-27-2012 |
| 20130027809 | HIGH DATA RATE MAGNETIC WRITER DESIGN - A high speed magnetic data writer containing a stitched pole tip that works in conjunction with the main pole is disclosed, together with a process for their manufacture. The material composition of each of these two sub-structures is slightly different; one sub-structure is optimized for high magnetic damping while the other sub-structure is optimized for high saturation magnetization. | 01-31-2013 |
| 20130128385 | OVERCOATS THAT INCLUDE MAGNETIC MATERIALS - A device having an air bearing surface, the device including a writer portion having an air bearing surface at the air bearing surface of the device; and an overcoat layer disposed on at least a portion of the air bearing surface of the writer portion, wherein the overcoat includes a material having a magnetic moment of at least about 0.1 Tesla (T). | 05-23-2013 |
| 20140002927 | WRITE HEAD STRUCTURE DESIGNED FOR TEMPERATURE INSENSITIVE WRITING PERFORMANCE | 01-02-2014 |
| 20140307348 | High Data Rate Writer Design - A magnetic write head is fabricated with its main pole attached to and magnetically coupled to a tapered yoke. The tapered yoke can be a top yoke (on the trailing side of the pole), a bottom yoke (on the leading side of the pole) or a combination of top and bottom configurations. The tapered portion of the yoke is at the distal end of the yoke and it is an extension of an otherwise uniformly thick yoke. It is found that the taper enables the yoke to be close to the ABS for better response times and a high data rate, while simultaneously being distant, producing less field disturbance by the shields and corresponding improvement of BER, and ATE/WATE. A taper of 45° is optimal for its production of uniform magnetization of the pole and optimal response times. | 10-16-2014 |
| 20140362473 | LOW FRICTION TAPE HEAD - A magnetic head according to one embodiment includes outer portions each having a tape bearing surface and an array of transducers selected from a group consisting of readers and writers; a central portion positioned between the outer portions, the central portion having a tape bearing surface and an array of transducers selected from a group consisting of readers and writers; wherein outer edges of the tape bearing surfaces of the outer portions are non-skiving, wherein an inner edge of each of the tape bearing surfaces of the outer portions is adapted for skiving air from the magnetic medium when the magnetic medium travels in a direction from the central portion towards the respective outer portion. | 12-11-2014 |
| 20140368953 | TAPE HEAD WITH TAPE-BEARING SURFACE EXHIBITING AN ARRAY OF PROTRUDING TOPOGRAPHIC FEATURES - A tape head, adapted for reading and/or writing to a magnetic tape, has a tape-bearing surface and is configured to urge a magnetic tape against the bearing surface, in operation. The bearing surface includes a transducer area, having at least one transducer that is a read and/or write element, designed for reading and/or writing to a magnetic tape, and a structured area adjacent to the transducer area, comprising a periodic array of topographic features, the topographic features configured within the structured area to determine a minimal distance between the transducer area and a tape. | 12-18-2014 |
| 20150049400 | GRADIENT WRITE GAP FOR PERPENDICULAR MAGNETIC RECORDING WRITER - The present disclosure provides for a magnetic writer pole for use in a hard drive. The magnetic writer pole comprises a first bevel formed by a non-magnetic layer, the first bevel formed at a first angle and extending to a first throat height. The magnetic writer pole further comprises a second bevel formed by the non-magnetic layer and extending distally from the first bevel at a second angle that is greater than the first angle and extending to a second throat height. The magnetic writer pole further comprises a third bevel formed by the non-magnetic layer and extending distally from the second bevel at a third angle that is greater than the second angle. | 02-19-2015 |
| 20150103439 | WRITE POLE WITH VARYING BEVEL ANGLES - A magnetic element can have at least a write pole configured with a write pole tip that has a tip surface oriented at a first angle with respect to an air bearing surface (ABS), a first bevel surface extending from the ABS and oriented at a second angle with respect to the ABS, and a second bevel surface extending from the ABS and oriented at a third angle with respect to the ABS. The first, second, and third angles may be configured to be different and non-orthogonal to each other. | 04-16-2015 |
| 20170236536 | Fabrication of a Tape Head with a Monobloc Closure | 08-17-2017 |
| 20170236539 | Tape Head with Electrically Conducting Surface to Reduce Triboelectric Charging | 08-17-2017 |
