Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7589937 | Thin film magnetic head with high Fe alloy plating film and manufacturing method thereof Embodiments of the invention provide a lustrous and uniform plating film having high-performance magnetic characteristics and a thin film magnetic head usable in a high frequency recording band by using the plating film of the invention at a magnetic pole portion. P... | 09/15/2009 |
| 7515380 | Magnetic head and method for production therefor At least one of lower and upper magnetic cores is composed of magnetic films each of which contains two or more elements of Co, Ni, and Fe, which are formed by electroplating in a plating bath with pH 2 or less, and which have a saturation magnetic flux density of 2... | 04/07/2009 |
| 7511919 | Magnetic disk apparatus A magnetic disk apparatus capable of reducing deformation of a magnetic disk is disclosed. The magnetic disk apparatus comprises a magnetic disk on which data is recorded while the disk is driven, a hub around which the magnetic disk is supported from an under side ... | 03/31/2009 |
| 7443625 | Magnetic disk drive In the present invention, by making the width of the write element larger than the track pitch and securing a write magnetic field strong enough to reverse the magnetization of the magnetic layer, and further by writing while shifting a write head comprising the wri... | 10/28/2008 |
| 7440228 | Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field, while also being modified to suppress remanent magnetic fields occurring immed... | 10/21/2008 |
| 7385786 | Magnetic head slider and a magnetic disk device in which the slider is mounted A magnetic head slider includes a magnetic head for recording/reproducing information from/into a magnetic disk and a slider on which the magnetic head is mounted. The slider has a first surface and a second surface provided at an air-outflow side at positions with ... | 06/10/2008 |
| 7382576 | Thin film magnetic head and magnetic disk apparatus including the same Disclosed is a magnetic disk apparatus including a magnetic reproducing head portion, and a magnetic recording head including an upper magnetic core having a end portion and a rear portion. As a resist for a frame which is used for forming the rear portion, a negati... | 06/03/2008 |
| 7375913 | Suspension having magnetic head assembly mounted thereon and magnetic recording disk drive using the suspension A suspension having a magnetic head assembly 1 mounted thereon is provided, wherein the magnetic head assembly comprises: a write head 1-2; a read head 1-1; and a resistive heating element 1-3 for controlling the flyi... | 05/20/2008 |
| 7339762 | Magnetic recording and reading device A magnetic recording and reading device includes a magnetic recording medium having a substrate and at least one magnetic recording layer formed above the substrate, a magnetic head enabling a data transfer rate of more than 50 MB/s and a recording density of more t... | 03/04/2008 |
| 7336440 | Magnetic disc unit with gap between magnetic disc and shroud A magnetic disc unit includes a rotating disc type magnetic disc having an outer periphery, and a carriage arm linked to a head support mechanism for a recording/reproducing head. A base has an outer periphery and mounts the rotating disc type magnetic disc and the ... | 02/26/2008 |
| 7333301 | Magnetic recording head and method for manufacturing A thin-film magnetic head having little temperature rise in the element, good heat dissipation and a short magnetic path length (narrow coil pitch) and manufacturing method for same is provided. To form the coil of the thin-film magnetic head, a lower coil is first ... | 02/19/2008 |
| 7319573 | Magnetic disk drive having a suspension mounted transmission line including read and write conductors and a lower conductor Embodiments of the invention provide a magnetic disk drive which has improved electrical properties owing to a reduction in the loss of transmission line, improved vibration properties owing to a reduction in the stiffness of wiring around the head, and a flat imped... | 01/15/2008 |
| 7310203 | Thin film magnetic head having magnetic pole edge layer for achieving both improvement of recording magnetic field and reduction of unnecessary leakage magnetic field, and method of manufacturing same There is provided a thin film magnetic head, with letting a distance of a portion, where a width of a track portion in an upper magnetic pole changes, from a flying plane from a medium be Ly, and letting a distance of a portion, where a distance between right and le... | 12/18/2007 |
| 7301721 | Falling sensor and the information processing device making use of it A falling sensor is provided, which detects a falling of a magnetic disk drive or an information processing device installed with said magnetic disk drive and which is effective for avoiding physical damages of magnetic heads and magnetic disk media. The magnetic di... | 11/27/2007 |
| 7295396 | Magnetic disk drive Embodiments of the present invention reduce noise and residual vibration during random access operation of a magnetic disk drive. The magnetic disk drive which executes each instruction from an upper device to move a magnetic head from a start track to an end track ... | 11/13/2007 |
| 7292416 | CPP magneto resistive head with decreased variation in asymmetry and output A magnetoresistive head comprises a free magnetic layer that has first and second free magnetic films sandwiching a non-magnetic intermediate film therebetween, the respective magnetizing directions of the first and the second free magnetic films are antiparallel. T... | 11/06/2007 |
| 7280321 | Magnetoresistive head A magnetoresistive head of a type including a magnetoresistive film arranged between a lower shield layer and an upper shield layer, wherein the lower shield layer has a non-magnetic layer adjacent to it and the lower shield layer and the upper shield layer are form... | 10/09/2007 |
| 7274542 | Magnetic sensor having a free layer containing a single magnetic domain A magnetic sensor includes a spacer having at least a nonmagnetic metal layer inserted between the upper shield layer and the longitudinal bias layers or between the upper shield layer and the longitudinal bias layers plus the magnetoresistive film, the shortest dis... | 09/25/2007 |
| 7271970 | Composite magnetic head arranged so the reproducing elements do not overlap a pole of a recording element A conventional magnetic head has a structure, in which a MR element and a recording element are stacked. The influence of a recording magnetic field on the magnetically sensitive portion of a reproduction element is lessened and the performance of the MR element is ... | 09/18/2007 |
| 7267894 | Magnetic recording medium and magnetic recording apparatus A magnetic recording apparatus including a drive unit to drive the magnetic recording medium, a compound-type magnetic head, a means to move the magnetic head relative to the magnetic recording medium, and a means to process recording and retrieving signals generate... | 09/11/2007 |
| 7267757 | Magnetic head utilizing a CoNiFe alloy with 60-80 weight percent Fe and method for production therefor At least one of lower and upper magnetic cores is composed of magnetic films each of which contains two or more elements of Co, Ni, and Fe, which are formed by electroplating in a plating bath with pH 2 or less, and which have a saturation magnetic flux density of 2... | 09/11/2007 |
| 7262940 | Separate read/write magnetic head A separate read/write magnetic head of the present invention includes a magnetoresistive head 11 having a magnetoresistive film 25 disposed between a lower shield 23 and an upper shield 28, both of which are formed on a substrate 21 | 08/28/2007 |
| 7259936 | Glass substrate for a magnetic disk, a magnetic disk which can be formed with a stable texture and a magnetic disk device A glass substrate for a magnetic disk contains a transition metal. The substrate, which is subjected to formation of zone texturing by irradiating the substrate with a laser beam, has a high mechanical strength even if it is not chemically strengthened. The glass su... | 08/21/2007 |
| 7259929 | Device and signal processing circuit for magnetic recording, magnetic recording apparatus A magnetic recording/reproducing apparatus includes a partial-response equalization circuit having frequency characteristic of cutting off low-frequency signal components inclusive of DC components; and a maximum-likelihood decoder, in which a reproduced signal outp... | 08/21/2007 |
| 7248439 | Magnetic head supporting mechanism utilizing elongated portions of a load beam to define an opening in the load beam A magnetic disc apparatus having a magnetic head supporting mechanism which includes a slider, a load beam having a spring portion and a pivot, and a gimbal having a mounting portion on which the slider is mounted. The gimbal has flexible finger portions spaced from... | 07/24/2007 |
| 7245447 | Magnetic read/write apparatus having a write inhibit slice setting circuit A magnetic read/write apparatus comprises: a recording medium; and a head for writing/reading data to/from each sector on the recording medium; wherein the magnetic read/write apparatus further comprises: a write inhibit slice setting circuit for, when data is writt... | 07/17/2007 |
| 7239124 | Current measurement technique and current measurement apparatus A current measurement method for measuring a current that flows in a transmission line of an electric circuit including steps of installing a magnetooptical device in a magnetic field which is generated based upon current that flows in the transmission line, making ... | 07/03/2007 |
| 7227712 | Disk drive apparatus and method of mounting same A disk drive apparatus mounting socket includes a socket portion which supports a disk drive apparatus, a lead portion which is connected to the disk drive apparatus supported by the socket portion, and a terminal unit which is electrically connected to the lead por... | 06/05/2007 |
| 7221544 | Magnetic recording apparatus and magnetic head Formation of magnetic domains in a perpendicularly magnetized medium comprising an underlayer of a soft magnetic layer is prevented by appropriate magnetic domain control in the soft magnetic layer. One method controls magnetic domains of the soft magnetic layer by ... | 05/22/2007 |
| 7221538 | Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field exceeding 10 kOe while suppressing remanent magnetic fields occurring immediate... | 05/22/2007 |
| 7221530 | Magnetic head with high reliability of the data protection, magnetic disk apparatus including the magnetic head and the method of recording information on the magnetic disk apparatus without miserasing the previously recorded data There are provided a magnetic head and a magnetic disk apparatus wherein an upper magnetic pole is so shaped that, at a position where skew angle is maximum, the maximum of its projected length in the radial direction of a magnetic disk is not more than the track pi... | 05/22/2007 |
| 7217467 | Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus A magnetic recording/reproducing apparatus is disclosed with high storage capability. The apparatus also prevents fluctuation of readback output and decay of magnetization or erasure of recorded magnetization in the recording layer. A soft magnetic underlayer and a ... | 05/15/2007 |
| 7209327 | Magnetoresistive head having magnetic domain control film in contact with underlayer and with ends of free layer A magnetic domain control underlayer is formed below a magnetoresistive multi-layered film thereby bringing the magnetic domain control film into contact with both lateral end faces of a free layer and appropriate magnetic domain control can be attained in a state o... | 04/24/2007 |
| 7209309 | Magnetic disk apparatus and method of controlling the same A magnetic disk apparatus includes a rotation mechanism for driving a magnetic disk, a magnetic head slider being floated in close proximity to a surface of the magnetic disk, a recording/reproduction element for performing recording and playback of information, a d... | 04/24/2007 |
| 7209326 | Magnetoresistive head and manufacturing method thereof A magnetoresistive head in which a pinned layer comprises two films, i.e., a ferromagnetic film A and a ferromagnetic B anti-ferromagnetically coupled to each other and a anti-ferromagnetic coupling film for separating the two ferromagnetic films A and B, where the ... | 04/24/2007 |
| 7206175 | Magnetoresistive head having defined relationships between the tract width and magnetization film thickness product to permit no hysteresis in the transfer curve In a narrow magnetoresistive head having a magnetic domain control film comprising a single layer of magnetic film or magnetic films antiferromagnetically coupled by means of a nonmagnetic member, it has been found that the magnetic domain can be controlled with a s... | 04/17/2007 |
| 7199955 | Decoding apparatus and decoding method In a coding method which does not restrict a run length of “1” while data is recorded/reproduced, there are such a drawback that when an error correction is carried out, a total number of error data to be corrected is increased, and also errors of not-detectable... | 04/03/2007 |
| 7180704 | Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the head A magnetic head is composed to diminish disordered writing bits of a recording layer or reading noise caused by a magnetic field generated from an under layer without decreasing a writing magnetic field strength of the magnetic head. The magnetic head includes a wri... | 02/20/2007 |
| 7177115 | Magnetic recording and reading device A magnetic recording and reading device having a transfer rate of not less than 50 MB/s includes a magnetic recording medium having an absolute value of normalized noise coefficient per recording density of not more than 2.5×10−8 (μVrms)(inch) (μm) | 02/13/2007 |
| 7177121 | Magnetoresistive sensor with random crystal orientation underlayer and magnetic domain control film center aligned with free layer In a magnetoresistive head according to the present invention, a magnetic domain control film formed at the end of a free layer of a stack of magnetoresistive layers is formed of a Co alloy film, and an underlayer controlling the crystallization state of the Co allo... | 02/13/2007 |
