Patent application number | Description | Published |
20100302688 | Magnetoresistive Effect Head and Magnetic Recording/Playback Device - According to one embodiment, a magnetoresistive effect head includes a lower magnetic shield provided on a substrate, a magnetoresistive effect film laminated from a pinned layer with a pinned direction of magnetization, an intermediate layer, a free layer having a varying direction of magnetization controlled by an applied external magnetic field, a magnetic domain control layer formed with an intervening insulation layer on both sides in a track width direction of the magnetoresistive effect film, an upper magnetic shield, and electrodes for directing sense current flow in a direction perpendicular to a film surface of the magnetoresistive effect film, wherein a magnetic field applied by the magnetic domain control layer to a region away from an ABS of the free layer is at least 1.4 times larger than a magnetic field applied by the magnetic domain control layer to a region near the ABS of the free layer. | 12-02-2010 |
20110116184 | MAGNETIC HEAD HAVING A MULTILAYER MAGNETIC FILM AND METHOD FOR PRODUCING THE SAME - According to one embodiment, a method for producing a magnetic head includes depositing a first film above a substrate, etching a pattern into the first film, depositing a second film on the etched portion of the first film, and depositing a third film above the first and second film to form a multilayer magnetic film, wherein the second film is embedded between the first and third film in a portion of the first film that is removed. In another embodiment, a differential magnetic read head includes a magnetic multilayer film comprising a stack of a first magnetic sensor film and a second magnetic sensor film which are not magnetically connected and a hard magnetic film provided on both sides in a track width direction of the magnetic multilayer film for controlling a magnetic domain of the magnetic multilayer film. The hard magnetic film is a laminated structure as described above. | 05-19-2011 |
20110134564 | MAGNETIC HEADS HAVING A GRADED DOMAIN CONTROL FILM AND METHODS OF MANUFACTURE THEREOF - A magnetic head, according to one embodiment, includes a sensor film, a sensor cap film provided above the sensor film, a pair of shields including an upper magnetic shield and a lower magnetic shield which serve as electrodes that pass current in a film thickness direction of the sensor film, a track insulating film contacting both sides of the sensor film in the track width direction, a graded domain control film arranged on both sides in the track width direction of the sensor film adjacent the track insulating film, and an element height direction insulating film positioned on an opposite side of the sensor film relative to an air-bearing surface, wherein an edge position of the element height direction insulating film adjacent the sensor film on the air-bearing surface side is substantially the same as an edge position of the sensor cap film in the element height direction. | 06-09-2011 |
20120187079 | METHOD FOR MANUFACTURING A MAGNETIC SENSOR HAVING A FLAT UPPER SHIELD - A method for manufacturing a magnetic sensor that has a flat upper shield. A sensor stack is formed with a sensor capping layer at its top and a first CMP stop layer over the sensor capping layer and a mask formed over the CMP stop layer. A hard bias layer and second CMP stop layer are deposited over the sensor stack, capping layer, first CMP stop layer and mask. A chemical mechanical polishing process is then performed to remove the mask, leaving a portion of the hard bias layer exposed between the first and second CMP stop layers. An ion milling is then performed to etch back the exposed portions of the hard magnetic bias layer. A reactive ion etching is then performed to remove the remaining first and second CMP top layers. An upper shield can then be formed on a substantially flat surface. | 07-26-2012 |
20140133052 | MAGNETORESISTIVE SENSOR HAVING REDUCED READ GAP AND STRONG PINNED LAYER STABILITY - A magnetic read head having a reduced read gap and a stable magnetic pinned layer structure. The sensor includes a seed layer that has a surface formed with an anisotropic texture. A magnetic pinned layer formed over the seed layer has a body centered cubic structure which causes the pinned layer structure to have a magnetic anisotropy with an easy axis oriented perpendicular to the air bearing surface when deposited over the textured seed layer. A magnetic free layer structure formed over the pinned layer structure and over a non-magnetic barrier layer has a face centered cubic structure which causes the magnetic free layer to have a magnetic anisotropy with an easy axis oriented parallel with the air bearing surface. | 05-15-2014 |
20150085395 | MAGNETIC HEAD HAVING A LONG THROAT HEIGHT PINNED LAYER WITH A SHORT HEIGHT HARD BIAS LAYER - In one embodiment, a magnetic head includes a lower shield, a magnetoresistive (MR) film positioned above the lower shield, the MR film including a pinned layer, an intermediate layer positioned above the pinned layer, and a free layer positioned above the intermediate layer, the free layer being configured for sensing data on a magnetic medium, wherein a track width of the MR film is defined by a width of the free layer in a cross-track direction, a bias layer positioned on both sides of the MR film in the cross-track direction, a track insulating film positioned on both sides of the MR film in the cross-track direction and between the MR film and the bias layer, and an upper shield positioned above the bias layer and the MR film, wherein a length of the free layer in an element height direction perpendicular to an air bearing surface of the magnetic head is less than a length of the pinned layer in the element height direction. | 03-26-2015 |
Patent application number | Description | Published |
20080218910 | Magnetic detection element and manufacturing method thereof - Embodiments of the present invention help to reduce etching damage at end parts of a magnetoresistive sensor in ion beam etching. According to one embodiment, ion beam etching (IBE) is used in a magnetoresistive sensor track width forming step. This IBE irradiates Ar ion beam to a substrate in a state that the substrate is inclined and further rotates the substrate about its normal as a rotational axis. In a conventional track width forming step, the IBE irradiates the Ar ion beam to the substrate all the time while the IBE is rotating the substrate. By contrast, the IBE according to embodiments of the present invention irradiates the Ar ion beam to the substrate only in a predetermined specific angular range. | 09-11-2008 |
20090046394 | Sensor shape and etching process of CPP magnetic head for reduce property degradation - Embodiments of the present invention help to prevent a head characteristic from being deteriorated by re-deposition or damage which occurs when a sensor film is etched, a track width is narrowed, and the head characteristic is stabilized. According to one embodiment, when it is assumed that the thickness of the sensor film on an air bearing surface is T, and a distance between an end of a medium layer that is interposed between a free layer and a pinned layer which comprise the sensor film and an end of the sensor film lowest portion, a relationship of 1.2×T≦x≦2.5×T is satisfied, and the ends of a pair of magnetic films which are in contact with both sides in the track-width direction through an insulator do not exist in the track central portion from the free layer end. The sensor film is etched while an incident angle of an etching beam is changed over, and when it is assumed that a direction normal to the sensor film surface is the incident angle of 0, etching is conducted under the condition where the incident angle of the etching beam becomes smaller with time. | 02-19-2009 |
20100118448 | DIFFERENTIAL HEAD HAVING A BALANCED OUTPUT AND METHOD OF MANUFACTURING THEREOF - In one embodiment, a differential-type magnetic read head includes a differential-type magneto-resistive-effect film formed on a substrate, and a pair of electrodes for applying current in a direction perpendicular to a film plane of the film. The film includes a first and second stacked film, each having a pinned layer, an intermediate layer, and a free layer, with the second stacked film being formed on the first stacked film. A side face in a track width direction of the film is shaped to have an inflection point at an intermediate position in a thickness direction of the film, and the side face is shaped to be approximately vertical to the substrate in an upward direction of the substrate from the inflection point. Also, the side face is shaped to be gradually increased in track width as approaching the substrate in a downward direction of the substrate from the inflection point. | 05-13-2010 |
20100123977 | VERTICAL-CURRENT-TYPE REPRODUCING MAGNETIC HEAD AND METHOD OF MANUFACTURING THE SAME - In one embodiment, a vertical-current-type reproducing magnetic head includes a sensor film, an upper shield paired with a lower shield that together flow a current into the sensor film in a thickness direction of the sensor film, and magnetic-domain control magnetic films provided above both sides of the sensor film in a track width direction of the sensor film. The shield is formed via a nonmagnetic adhesion layer including a discontinuous region near the sensor film, and the sensor film contacts the upper shield. In another embodiment, a method includes forming a resist layer, etching a sensor film while using the resist layer as a mask, forming first insulating films, domain-control magnetic films, and nonmagnetic adhesion layers in a stacked manner, lifting-off the resist layer, and forming an upper shield that together with a lower shield flow current into the sensor film in a thickness direction of the sensor film. | 05-20-2010 |
20100142100 | Magnetoresistive Head With A CPP Structure Having Suppressed Side Reading - According to one embodiment, a CPP structure magnetoresistive head includes a magnetoresistive sensor film between a lower shield layer and an upper shield layer and a longitudinal biasing layer disposed at each side of the magnetoresistive sensor film via a read track width defining insulator film. In the stripe height direction, the length of the longitudinal biasing layer is longer than the length of a second ferromagnetic layer in which its magnetization rotates in response to the external magnetic field. The second ferromagnetic layer is one of the layers comprising the magnetoresistive sensor film. At a stripe height, the surface of each longitudinal biasing layer has a step to change the thickness thereof across the step so that the air bearing surface section thereof has a larger thickness than any other section. Other structures using a magnetoresistive head and methods of production thereof are described as well. | 06-10-2010 |