Patent application number | Description | Published |
20080232001 | PERPENDICULAR WRITE HEAD HAVING A STEPPED FLARE STRUCTURE AND METHOD OF MANUFACTURE THEREOF - A magnetic write head for data recording having a magnetic write pole with a stepped magnetic shell structure that defines a secondary flare point. The secondary flare point defined by the magnetic shell portion can be more tightly controlled with respect to its distance from the air bearing surface (ABS) of the write head than can a traditional flare point that is photolithographically on the main pole structure. This allows the effective flare point of the write head to be moved much closer to the ABS than would otherwise be possible using currently available tooling and photolithography techniques. The write head may also include a magnetic trailing shield that wraps around the main pole portion. The trailing shield can have a hack edge defining a trailing shield throat height that is either between the secondary flare point or coincident or behind the secondary flare point, depending on design requirements | 09-25-2008 |
20080273275 | FABRICATING A WRITE HEAD WITH MULTIPLE ELECTRONIC LAPPING GUIDES - Write heads and corresponding methods of fabrication are provided using multiple electronic lapping guides to collect information regarding multiple distances of a write head, such as a throat height and a flare point distance of a write pole. A method of fabricating a write head includes fabricating a write pole and a corresponding write pole ELG. The method further includes fabricating a trailing shield and a corresponding trailing shield ELG. The method further includes performing a lapping process on the write head, and monitoring a lapping depth of the lapping process based on the resistance of the write pole ELG and the resistance of the trailing shield ELG. | 11-06-2008 |
20090154015 | MAGNETIC WRITE POLE FABRICATION - Write elements and methods of fabricating magnetic write poles are described. For one method, a vertical mask structure is formed on a magnetic layer in locations of a pole tip and a yoke of a write pole. The vertical mask structure may be formed by coating vertical surfaces of resists with an atomic layer deposition (ALD) process or a similar process. A removal process is then performed around the vertical mask structure to define the pole tip and part of the yoke of the write pole, and the vertical mask structure is removed. A lower portion of the pole tip is them masked while the upper portion of the pole tip and the part of the yoke is exposed. The upper portion of the pole tip and the part of the yoke are then expanded with magnetic material, such as with a plating process. | 06-18-2009 |
20090168247 | MAGNETIC HEAD WITH EMBEDDED SOLDER CONNECTION AND METHOD FOR MANUFACTURE THEREOF - A slider for magnetic data recording, the slider including a plurality of solder pads that are embedded into the head. The solder pads can be formed during the formation of read and/or write heads, and can each be contained within a cavity. These cavities can be photolithographically patterned so that they can be formed very close together. In addition, because the solder pads are contained within the cavities, they do not flow into one another as would standard solder balls so that the embedded solder balls can be spaced much more closely together than standard solder balls can, without the risk of shorting between solder pads. | 07-02-2009 |
20090168258 | HYBRID, SELF ALIGNED MAGNETIC WRITE HEAD WITH A PARTIALLY PLATED POLE AND METHOD OF PRODUCING SAME - A magnetic write head for perpendicular magnetic recording. The write head has a secondary flare point defined by magnetic structures that extend from the sides of the write pole, but not over the trailing edge of the write pole. The magnetic structures each have a front edge that defines the secondary flare point. By constructing the magnetic structures so that they only extend from the sides of the write pole and not over the write pole, they can be formed by electroplating, while leafing the mask structure (used to define the write pole) still intact, thereby greatly simplifying manufacture and preventing damage to the write pole during manufacture. | 07-02-2009 |
20090195905 | METHOD, SYSTEM, AND COMPUTER PROGRAM PRODUCT FOR THERMALLY ASSISTED RECORDING SYSTEMS - A method according to one embodiment comprises using a heating device, inducing localized heating on a magnetic medium during a recording operation; detecting a temperature in a vicinity of the heating device; detecting a current of the heating device; and performing an action if a function of at least one of the temperature and the current is outside an acceptable operation zone. A method according to another embodiment comprises selecting an initial current of a heating device for inducing localized heating on a magnetic medium during recording operations; initiating the heating device; performing recording operations; monitoring a temperature in a vicinity of the heating device during the recording operations; and if a function of the temperature and the current is outside an acceptable operation zone, changing an operating parameter such that the function of the temperature and the current is in the acceptable operation zone. | 08-06-2009 |
20090195920 | Main pole bridge structure - A method of reducing flux leakage between a main pole and a wrap around shield (WAS) is provided. A gap underneath a main pole is etched. Magnetic material is deposited in the gap. A layer of nonmagnetic material is deposited on the magnetic material, wherein the layer of nonmagnetic material reduces flux leakage between the main pole and the WAS. | 08-06-2009 |
20090195930 | MAGNETIC RECORDING SLIDER WITH FLEX SIDE PADS - A system according to one embodiment comprises a slider having an air bearing surface side and a flex side, the flex side being positioned on an opposite side of the slider as the air bearing surface side; electrical pads on the flex side of the slider; and a heating device in electrical communication with the electrical pads, where the heating device comprises a least one optical element A method according to one embodiment comprises positioning pads of a heating device towards pads on a slider; detecting an impedance in a circuit including the pads of the heating device; moving the heating device relative to the slider to minimize the impedance; and coupling the heating device to the slider. Additional systems and methods are provided. | 08-06-2009 |
20090196128 | THERMALLY ASSISTED RECORDING SYSTEMS WITH LOW LOSS LIGHT REDIRECTION STRUCTURE - A system according to one embodiment comprises a slider having a first light channel and a second light channel, the first and second light channels having axes oriented at an angle relative to each other, the angle being less than 180 degrees; and a reflection portion adjacent an exit of the first light channel and an entrance to the second light channel, the reflection portion having an index of refraction that is different than an index of refraction of the first light channel, such that light from the first light channel is reflected into the second light channel. Additional systems and methods are provided. | 08-06-2009 |
20090268348 | WRITE HEAD LAPPING GUIDE ABOUT ALIGNED TO A NON-MAGNETIC LAYER SURROUNDING A WRITE POLE AND A METHOD FOR MAKING THE SAME - A method in one embodiment includes forming an electric lapping guide layer; forming a write pole; forming a first gap layer over the write pole; masking a portion of the first gap layer for defining a window over the write pole and at least a portion of the electric lapping guide layer; and forming a bump over the write pole in the window. A system in one embodiment includes an electric lapping guide layer; a write pole positioned to one side of the electric lapping guide layer; and a bump formed over the write pole in a window, wherein a back end of the electric lapping guide layer and a front end of the bump are about a same distance from a lapped surface of a head. Additional methods and systems are presented. | 10-29-2009 |
20100002330 | Thermally assisted recording head control means for protrusion management - Methods and structures for improving fly height control for thin film write heads utilized in thermally assisted recording are disclosed. Methods include the use of the TAR near field light source to provide a preheating pulse to improve the transient response when moving from one fly height to another prior to writing data. Methods and structures having an additional auxiliary optical heating source to avoid media overheating and replacement of embedded resistive heaters are also disclosed. | 01-07-2010 |
20100046120 | WRITE HEAD WITH INTEGRATED COIL AND SHIELD STRUCTURE - Disk drive systems and associated methods of fabrication are disclosed for a write head having an integrated coil and shield structure. The write head includes a write pole having a pole tip adjacent to an air bearing surface, and a return pole having a surface adjacent to the air bearing surface. The write pole and the return pole are connected to one another by a back gap section that is distal from the air bearing surface. The write head also includes a coil formed from electrically conductive materials. The coil includes a segment that is formed proximate to the air bearing surface. The coil segment is formed from a ferromagnetic material so that the coil segment acts as a shield for the write pole. | 02-25-2010 |
20100091407 | PERPENDICULAR WRITE HEAD HAVING A STEPPED FLARE STRUCTURE AND METHOD OF MANUFACTURE THEREOF - A magnetic write head for data recording having a magnetic write pole with a stepped magnetic shell structure that defines a secondary flare point. The secondary flare point defined by the magnetic shell portion can be more tightly controlled with respect to its distance from the air bearing surface (ABS) of the write head than can a traditional flare point that is photolithographically on the main pole structure. This allows the effective flare point of the write head to be moved much closer to the ABS than would otherwise be possible using currently available tooling and photolithography techniques. The write head also includes a non-magnetic spacer layer formed over the magnetic shell structure that is recessed from the ABS by a distance that is greater than that of the magnetic shell portion. A magnetic shield is formed over the magnetic shell and non-magnetic spacer. | 04-15-2010 |
20100126001 | Method for self aligning a lapping guide with a structure of a magnetic write head - A method for self aligning a lapping guide with a structure of a write pole. A write pole is formed over a substrate and an electrically conductive material lapping guide material is deposited in a location that is removed from the write pole. A mask is then formed over a portion of the write pole and a portion of the electrically conductive material. A material removal process such as reactive ion etching can then be performed to remove a portion of the magnetic material that is not protected by the mask structure. An magnetic material is then electroplated over the write pole with the write pole, with the mask still in place. In this way, the electroplated material has an edge that is self aligned with an edge of the electrically conductive lapping guide material, both being defined by the same mask structure. | 05-27-2010 |
20100128392 | PERPENDICULAR WRITE HEAD HAVING A STEPPED FLARE STRUCTURE AND METHOD OF MANUFACTURE THEREOF - A magnetic write head for data recording having a magnetic write pole with a stepped magnetic shell structure that defines a secondary flare point. The secondary flare point defined by the magnetic shell portion can be more tightly controlled with respect to its distance from the air bearing surface (ABS) of the write head than can a traditional flare point that is photolithographically on the main pole structure. This allows the effective flare point of the write head to be moved much closer to the ABS than would otherwise be possible using currently available tooling and photolithography techniques. The write head also includes a non-magnetic spacer layer formed over the magnetic shell structure and a trailing magnetic shield, a portion of which is formed over the non-magnetic spacer. | 05-27-2010 |
20100163520 | STRUCTURE FORMATION USING METAL DEPOSITED ON A RIE-ABLE SEEDLAYER - Methods for fabricating a device component are provided. A substrate comprising a RIE stop layer, an oxide layer formed on the RIE stop layer, and a RIE-able layer formed on the oxide layer may be provided. A resist layer may be patterned on the RIE-able layer. A metal layer may be formed on portions of the RIE-able layer that are not covered by the resist layer. The resist layer may be removed and an RIE performed to remove exposed portions of the RIE-able layer and portions of the oxide layer beneath the exposed portions of the RIE-able layer. Thereafter, the metal layer may be removed, and the component may be formed in an opening in the oxide layer formed during the RIE. | 07-01-2010 |
20100165513 | WRITE HEAD WITH SELF-ALIGN LAYER AND A METHOD FOR MAKING THE SAME - A system according to one embodiment includes a write pole having an end region positioned towards an air bearing surface, a first flare point, and a second flare point positioned between the air bearing surface and the first flare point; and a shield positioned above the write pole, wherein a cross sectional area of the write pole at a point between the first and second flare points along a plane passing through the write pole and oriented about parallel to the air bearing surface is greater than a cross sectional area of the end region of the write pole along a plane oriented parallel to the plane passing through the second flare point. Additional systems and methods are also presented. | 07-01-2010 |
20100252440 | Electroplating on ultra-thin seed layers - Methods and structures for the electroplating on ultra-thin seed layers are disclosed. A dual layer structure is utilized, consisting of a thicker, highly conductive layer surrounding device structures. Within the device die, an ultra-thin seed layer is employed, which is electrically coupled to the conduction layer. Using this technique, electroplating of critical device structures can be carefully controlled and made uniform across the full diameter of the wafer. The technique also allow for the deployment of ultra-thin seed layers of varying thickness and composition in different locations within the circuit device, or in different die on the wafer. | 10-07-2010 |
20100320393 | OFF-AXIS ION MILLING DEVICE FOR MANUFACTURE OF MAGNETIC RECORDING MEDIA AND METHOD FOR USING THE SAME - A tool for patterning a disk such as a magnetic media disk for use in a disk drive system. The tool includes a chamber and a first and second series of magnets, each evenly spaced about the chamber wall. An ion beam source at an end of the chamber emits an ion beam toward the disk which is held within the chamber. The first series of magnets deflect the ion beam away from center and toward the chamber wall. The second ion beam source deflects the ion beam back toward the center so that the ion beam can strike the disk at an angle. In addition, to bending the ion beam, the magnets also rotate the bent ion beam so the movement of the ion beam revolves within the chamber. | 12-23-2010 |
20100326819 | METHOD FOR MAKING A PATTERNED PERPENDICULAR MAGNETIC RECORDING DISK - A method for making a patterned-media magnetic recording disk uses nano-imprint lithography (NIL) for patterning a resist layer over the magnetic recording layer. A hard mask layer is located above the magnetic recording layer and an etch stop layer is located above the hard mask layer and below the resist layer. Residual resist material in the recesses of the patterned resist layer is removed by reactive ion etching (RIE) to expose the underlying etch stop layer. The etch stop material in the recesses is then removed by RIE to expose regions of the hard mask layer. A reactive ion milling (RIM) process removes the exposed hard mask material. The RIM process causes no undercutting of the unexposed hard mask material, which allows the very small critical dimensions of the patterned-media disk to be reliably achieved when ion milling is subsequently performed through the hard mask that has been patterned by the RIM process. | 12-30-2010 |
20110064914 | LABELING AN IMPRINT LITHOGRAPHY TEMPLATE - Embodiments herein provide relatively permanent labeling of an imprint lithography template. The imprint lithography template generally has first and second sides, one side having a pattern to imprint a substrate and the other being optically smooth to unobstructably pass UV light. In one embodiment, a method of labeling the imprint lithography template includes placing a masking layer on a portion of the first side (e.g., the optically smooth side) of the template, forming a liftoff layer on the remainder of the first side of the template, removing the masking layer to expose the portion of the first side of the template, and placing a polymer mark on the exposed portion of the first side of the template. The method also includes depositing an opaque material on the first side of the template and removing the liftoff layer and the mark to form a label on the first side of the template with the deposited opaque material. | 03-17-2011 |
20110074062 | SYSTEM, METHOD AND APPARATUS FOR MANUFACTURING MAGNETIC RECORDING MEDIA - A system, method and apparatus for manufacturing high density magnetic media is disclosed. A flexible mold having a very low modulus of less than about | 03-31-2011 |
20120087036 | Patterned media with offset PES servo segments with length encoded track position - Patterned discrete track magnetic media compatible with the constraints imposed by the use of self-assembly technology are described in which the PES servo portion of each servo sector has at least one offset segment used for the position error signal (PES). The downtrack length of the PES offset segment systematically varies according to the track position to encode information about the track position usable by the servo system. The downtrack length of the offset segment and, therefore, the time between the corresponding signal shifts is systematically varied from the inner diameter (ID) to the outer diameter (OD) according to the track position to provide coarse information to the servo system even if part of the track ID code cannot be read. Alternative embodiments include a preamble timing mark formed by another offset segment. A self-servo writing method is described using the preamble timing marks. | 04-12-2012 |
20120087037 | Patterned media with structured PES servo segments encoding local track position - Patterned magnetic media are described in which the servo sectors include at least two PES offset segments that can be used for the position error signal (PES) and identification of local track position. The two PES offset segments deviate from the track centerline in opposite directions. The lengths of the offset PES offset segments are systematically varied in a repeating pattern to provide a unique servo signal pattern for each track in a local group of adjacent tracks. The locally unique servo sector pattern allows the servo system to use the pattern of the signals generated from the offset and non-offset segments to determine the local track position, which is similar to information provided by the low order Gray code bits in prior art designs. Therefore, the number of bits in the track ID code can be reduced. | 04-12-2012 |
20120138567 | NANOIMPRINT LITHOGRAPHY METHOD FOR MAKING A PATTERNED MAGNETIC RECORDING DISK USING IMPRINT RESIST WITH ENLARGED FEATURE SIZE - A method for making a patterned-media magnetic recording disk using nanoimprint lithography (NIL) enlarges the size of the imprint resist features after the imprint resist has been patterned by NIL. The layer of imprint resist material is deposited on a disk blank, which may have the magnetic layer already deposited on it. The imprint resist layer is patterned by NIL, resulting in a plurality of spaced-apart resist pillars with sloped sidewalls from the top to the base. An overlayer of a material like a fluorocarbon polymer is deposited over the patterned resist layer, including over the sloped resist pillar sidewalls. This enlarges the lateral dimension of the resist pillars. The overlayer is then etched to leave the overlayer on the sloped resist pillar sidewalls while exposing the disk blank in the spaces between the resist pillars. The resist pillars with overlayer on the sloped resist pillar sidewalls is then used as a mask for etching the disk blank, leaving a plurality of discrete islands on the disk blank. | 06-07-2012 |
20130016444 | METHOD FOR MANUFACTURING A PATTERNED MAGNETIC MEDIA WITH OFFSET DATA AND SERVO REGIONSAANM Grobis; Michael K.AACI San JoseAAST CAAACO USAAGP Grobis; Michael K. San Jose CA USAANM Lille; Jeffrey S.AACI SunnyvaleAAST CAAACO USAAGP Lille; Jeffrey S. Sunnyvale CA USAANM Ruiz; RicardoAACI Santa ClaraAAST CAAACO USAAGP Ruiz; Ricardo Santa Clara CA US - A method for manufacturing a patterned magnetic media. The method allows both a data region and a servo region to be patterned without the patterning of one region adversely affecting the patterning of the other region. The method results in a patterned data region a patterned servo region and intermediate regions between the servo and data regions. The intermediate regions, which are most likely, but not necessarily, asymmetrical with one another indicate that the method has been used to pattern the media. | 01-17-2013 |
20130084387 | METHOD FOR MAKING A PATTERNED PERPENDICULAR MAGNETIC RECORDING DISK HAVING A FePt or CoPt CHEMICALLY ORDERED RECORDING LAYER - A method for making a bit-patterned-media (BPM) magnetic recording disk includes depositing a FePt (or CoPt) alloy recording layer, and then depositing a sealing layer on the FePt layer before high-temperature annealing. The high-temperature annealing causes the FePt to become substantially chemically-ordered in the L1 | 04-04-2013 |
20130154020 | SYSTEM, METHOD AND APPARATUS FOR SEEDLESS ELECTROPLATED STRUCTURE ON A SEMICONDUCTOR SUBSTRATE - An integrated circuit has a doped silicon semiconductor with regions of insulators and bare silicon. The bare silicon regions are isolated from other bare silicon regions. A semiconductor device on the doped silicon semiconductor has at least two electrical connections to form regions of patterned metal. A metal is electroplated directly on each of the regions of patterned metal to form plated connections without a seed layer. A self-aligned silicide is located under each plated connection, formed by annealing, for the regions of plated metal on bare silicon. | 06-20-2013 |
20130265673 | PATTERNED MAGNETIC MEDIA WITH OFFSET DATA AND SERVO REGIONS - A patterned magnetic media having offset servo and data regions. The media can be constructed by a method that allows both a data region and a servo region to be patterned without the patterning of one region adversely affecting the patterning of the other region. The method results in a patterned data region a patterned servo region and intermediate regions between the servo and data regions. The intermediate regions, which are most likely, but not necessarily, asymmetrical with one another indicate that the method has been used to pattern the media. | 10-10-2013 |
20130319850 | NANOIMPRINT LITHOGRAPHY METHOD FOR MAKING A BIT-PATTERNED MEDIA MAGNETIC RECORDING DISK USING IMPRINT RESIST WITH ENLARGED FEATURE SIZE - A method for making a patterned-media magnetic recording disk using nanoimprint lithography (NIL) enlarges the size of the imprint resist features after the imprint resist has been patterned by NIL. The layer of imprint resist material is deposited on a disk blank, which may have the magnetic layer already deposited on it. The imprint resist layer is patterned by NIL, resulting in a plurality of spaced-apart resist pillars with sloped sidewalls from the top to the base. An overlayer of a material like a fluorocarbon polymer is deposited over the patterned resist layer, including over the sloped resist pillar sidewalls. This enlarges the lateral dimension of the resist pillars. The overlayer is then etched to leave the overlayer on the sloped resist pillar sidewalls while exposing the disk blank in the spaces between the resist pillars. The resist pillars with overlayer on the sloped resist pillar sidewalls is then used as a mask for etching the disk blank, leaving a plurality of discrete islands on the disk blank. | 12-05-2013 |
20140072830 | METHOD FOR SEPARATELY PROCESSING REGIONS ON A PATTERNED MEDIUM - The disclosure relates generally to a method for fabricating a patterned medium. The method includes providing a substrate with an exterior layer under a lithographically patterned surface layer, the lithographically patterned surface layer comprising a first pattern in a first region and a second pattern in a second region, applying a first masking material over the first region, transferring the second pattern into the exterior layer in the second region, forming self-assembled block copolymer structures over the lithographically patterned surface layer, the self-assembled block copolymer structures aligning with the first pattern in the first region, applying a second masking material over the second region, transferring the polymer block pattern into the exterior layer in the first region, and etching the substrate according to the second pattern transferred to the exterior layer in the second region and the polymer block pattern transferred to the exterior layer in the first region. | 03-13-2014 |
20140087016 | NANOIMPRINTING MASTER TEMPLATE AND METHOD FOR MAKING - A method for making a nanoimprinting master template uses a metallic etch stop layer for two etching steps. A layer of silicon dioxide is deposited on the etch stop layer and a first resist pattern of either concentric rings or radial spokes is formed on the silicon dioxide layer. The exposed silicon dioxide layer is etched down to the etch stop layer and the resist removed to expose a pattern of silicon dioxide rings or spokes on the etch stop layer. A second resist pattern of rings (if spokes were the first pattern) or spokes (if rings were the first pattern) is formed over the silicon dioxide rings or spokes and the etch stop layer. The exposed silicon dioxide is etched down to the etch stop layer and the resist removed to expose a pattern of silicon dioxide pillars on the etch stop layer. | 03-27-2014 |
20140138352 | METHOD FOR MAKING A FILM OF UNIFORMLY ARRANGED CORE-SHELL NANOPARTICLES ON A SUBSTRATE - A method for making a film of core-shell nanoparticles generally uniformly arranged on a substrate uses atomic layer deposition (ALD) to form the shells. The nanoparticle cores are placed in a solution containing a polymer having an end group for attachment to the cores. The solution is then applied to a substrate and allowed to dry, resulting in the nanoparticle cores being uniformly arranged by the attached polymer chains. ALD is then used to grow the shell material on the cores, using two precursors for the shell material that are non-reactive with the polymer. The polymer chains also form between the cores and the substrate surface, so the ALD forms shell material completely surrounding the cores. The uniformly arranged core-shell nanoparticles can be used as an etch mask to etch the substrate. | 05-22-2014 |
20140234466 | IMPRINT MOLD AND METHOD FOR MAKING USING SIDEWALL SPACER LINE DOUBLING - A method for making an imprint mold uses sidewall spacer line doubling, but without the need to transfer the sidewall spacer patterns into the mold substrate. A base layer is deposited on the mold substrate, followed by deposition and patterning of a mandrel layer into stripes with tops and sidewalls. A layer of spacer material is deposited on the tops and sidewalls of the mandrel stripes and on the base layer between the mandrel stripes. The spacer material on the tops of the mandrel stripes and on the base layer between the mandrel stripes is then removed. The mandrel stripes are then etched away, leaving stripes of sidewall spacer material on the base layer. The resulting mold is a substrate with pillars of sidewall spacer material patterned as stripes and extending from the substrate, with the sidewall spacers serving as the mold features for imprinting. | 08-21-2014 |
20150044321 | SYSTEM, METHOD AND APPARATUS FOR MANUFACTURING MAGNETIC RECORDING MEDIA - A system, method and apparatus for manufacturing high density magnetic media is disclosed. A flexible mold having a very low modulus of less than about 4 GPa is made on a rigid support. The mold nano-imprints a resist material on disks for hard disk drives. The flexible mold may comprise a perfluoropolyether with urethane acrylate end groups with a low surface adhesion from which the cured resist is easily released. | 02-12-2015 |