摘要:
A magnetic head/slider construction and a magnetic data recording disk, as well as a method for fabricating the magnetic head/slider construction and the magnetic data storage disk. To practice the method, there is formed over the air bearing surface of each of a magnetic head/slider construction and a magnetic data storage disk a wear resistant carbon layer. Over each of the wear resistant carbon layers is then formed a lubricating carbon layer. The lubricating carbon layers may be formed in-situ upon the wear resistant carbon layers. The wear resistant carbon layers may be formed from nitrogenated wear resistant carbon materials having a nitrogen content of from about 15 to about 30 atomic percent and hydrogenated wear resistant carbon materials having a hydrogen content of from about 15 to about 25 atomic percent. The lubricating carbon layer is preferably formed from a hydrogenated lubricating carbon material having a hydrogen content of from about 30 to about 40 atomic percent. Through the method, there is formed magnetic head/slider constructions and magnetic data recording disks simultaneously possessing improved wear resistance characteristics and improved lubricating properties.
摘要:
A method for forming a giant magnetoresistive (GMR) sensor element, and a giant magnetoresistive (GMR) sensor element formed in accord with the method. In accord with the method, there is first provided a substrate. There is then formed over the substrate a seed layer formed of a magnetoresistive (MR) resistivity sensitivity enhancing material selected from the group consisting or nickel-chromium alloys and nickel-iron-chromium alloys. There is then formed over the seed layer a nickel oxide material layer. Finally, there is then formed over the nickel oxide material layer a free ferromagnetic layer separated from a pinned ferromagnetic layer in turn formed thereover by a non-magnetic conductor spacer layer, where the pinned ferromagnetic layer in turn has a pinning material layer formed thereover. The method contemplates a giant magnetoresistive (GMR) sensor element formed in accord with the method. The nickel oxide material layer provides the giant magnetoresistive (GMR) sensor element with an enhanced magnetoresistive (MR) resistivity sensitivity.
摘要:
A method to form a passivation layer over a MR Sensor so that the passivation layer defines the track width. The passivation layer is formed simultaneously with the development of the lift off structure in a novel developing/oxidizing solution that oxidizes the MR sensor and develops the photoresist. The passivation layer is an electrical insulator that prevents sensor current from shunting through the overspray of the leads and a heat conductor to allow MR heat to dissipate through the overspray. The method comprises: spinning-on and printing a lift-off photoresist structure over the MR sensor. Next, the lift-off photoresist structure is developed. The MR sensor is anodized in a developing/oxidizing solution to: (1) remove portions of the lower photoresist and (2) to form a (e.g., thin NiFeO) passivation layer on the MR layer at least partially under the upper photoresist layer. The passivation layer is etched to remove the passivation layer not covered by the lift-off structure. Then, a lead layer is deposited over the passivation layer and MR sensor. The lift-off structure is removed.
摘要:
A method for forming a longitudinally magnetically biased dual stripe magnetoresistive (DSMR) sensor element comprises forming a first patterned magnetoresistive (MR) layer. Contact the opposite ends of the patterned magnetoresistive (MR) layer with a first pair of stacks defining a track width of the first magnetoresistive (MR) layer, each of the stacks including a first Anti-Ferro-Magnetic (AFM) layer and a first lead layer. Then anneal the device in the presence of a longitudinal external magnetic field. Next, form a second patterned magnetoresistive (MR) layer above the previous structure. Contact the opposite ends of the second patterned magnetoresistive (MR) layer with a second pair of stacks defining a second track width of the second patterned magnetoresistive (MR) layer. Each of the second pair of stacks includes spacer layer composed of a metal, a Ferro-Magnetic (FM) layer, a second Anti-Ferro-Magnetic (AFM) layer and a second lead layer. Then anneal the device in the presence of a second longitudinal external magnetic field.
摘要:
A magnetic head/slider construction and a magnetic data recording disk, as well as a method for fabricating the magnetic head/slider construction and the magnetic data storage disk. To practice the method, there is formed over the air bearing surface of each of a magnetic head/slider construction and a magnetic data storage disk a wear resistant carbon layer. Over each of the wear resistant carbon layers is then formed a lubricating carbon layer. The lubricating carbon layers may be formed in-situ upon the wear resistant carbon layers. The wear resistant carbon layers may be formed from nitrogenated wear resistant carbon materials having a nitrogen content of from about 15 to about 30 atomic percent and hydrogenated wear resistant carbon materials having a hydrogen content of from about 15 to about 25 atomic percent. The lubricating carbon layer is preferably formed from a hydrogenated lubricating carbon material having a hydrogen content of from about 30 to about 40 atomic percent. Through the method, there is formed magnetic head/slider constructions and magnetic data recording disks simultaneously possessing improved wear resistance characteristics and improved lubricating properties.
摘要:
A battery having the electrodes of multiple cell types interleaved to prevent thermal runaway by cooling a shorted region between electrodes. The battery includes multiple cell types where each cell type has multiple electrodes a first polarity. The electrodes of each of the cell types share a pair of the common electrodes having a second polarity. The electrodes of the multiple cell types and the multiple common electrodes are interleaved such that if the electrodes of the multiple cell types and the adjacent common electrodes of one or more cell types short together, the current within the shorted cells is sufficiently small to prevent thermal runaway and the electrodes of the adjacent cells of the other cell types of the first polarity and the common electrodes of the second polarity not having short circuits provide heat sinking for the heat generated by the short circuit to prevent thermal runaway.
摘要:
A write pole for vertical magnetic recording is described. It includes a trapezoidal prism of high magnetic moment material, having inwardly sloping sidewalls. Its parallel surfaces are between about 0.1 and 0.3 microns apart and the sidewalls slope in the range of 15.5 to 60 degrees relative to vertical.
摘要:
It is very difficult to produce a negative wall angle from either negative or positive-tone chemically amplified resists, especially by e-beam lithography. This problem has now been overcome by first forming a photoresist pedestal in the conventional way, followed by flood exposing with electrons. Then, a second development treatment is given. This results in removal of additional material from the sidewalls, said removal being greatest at the substrate and least at the pedestal's top surface, resulting in negatively sloping sidewalls. Application of this method to a process for forming a pole tip for a vertical magnetic writer is also discussed.
摘要:
The problem of increased edge sensitivity associated with the reduction of the spacing between bias magnets in a CPP head has been solved by limiting the width of the bias cancellation layer and by adding an extra layer of insulation to ensure that current through the device flows only through its central area, thereby minimizing its edge reading sensitivity.
摘要:
Increasing the output signal from CPP GMR devices by increasing the read current has not previously been considered an option because it would make the device run too hot. This problem has been overcome by using, for the upper and lower leads, materials that differ significantly in their thermoelectric powers. Thus, when DC is passed through the device, from − to + TEP leads, hot and cold junctions are formed and heat is transferred from the micro-device into the leads, resulting in a net local cooling of the device which enables it to operate at higher power. For a GMR device, this translates to a larger output voltage, making it easier, more sensitive, and more reliable to use.