Quotables
"Everyone acquainted with the subject will recognize it as a conspicuous failure."
Henry Morton, president of the Stevens Institute of Technology ; Said in 1880 about the light bulb
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7275307 | Method of making a magnetic head with ferrite between nonmagnetic portions and a nonmagnetic gap A method for making a magnetic head formed with a pair of magnetic core halves fitted to abut on each other having a nonmagnetic gap therebetween and having a slide contact plane for slide contact with a magnetic recording medium on which an end face of the nonmagne... | 10/02/2007 |
| 6360429 | Method for producing a magnetic head A method is provided for producing a magnetic head which includes a pair of magnetic cores. The method includes the steps of disposing projection end faces of respective magnetic cores to and opposite each other with a magnetic gap member inserted therebe... | 03/26/2002 |
| 6170150 | Method for producing magnetic head A method for producing a magnetic head with reduced cross talk. A position of a projection for forming a magnetic gap on each of two magnetic core half bodies is adjusted by forming first and second position adjusting projections for having sidewall surfa... | 01/09/2001 |
| 6088909 | Manufacturing method of complex magnetic head core A method for manufacturing a magnetic head core of a complex magnetic head includes binding a first core material of a U-shaped cross section and a second core material of a flat plate shape to form a tubular core material having two bonded portions betwe... | 07/18/2000 |
| 5943762 | Method and manufacturing a hybrid type magnetic head slider using a thin film coil A method of manufacturing a hybrid type magnetic head slider using a thin film coil in which a number of cores can be manufactured in the sane condition, and improvement and uniformity in yield and performance can be expected. A conductor pattern forming ... | 08/31/1999 |
| 5943196 | Apparatus for securing a thin film magnetic tape head closure using a C-core to interconnect gluing vias A method and apparatus including gluing vias in the closure surface and/or the recording module surface to increase bonding strength of the closure to the recording module. The surface of the recording module has a nonplanar topography along a gap side su... | 08/24/1999 |
| 5924189 | Method for producing a magnetic head A magnetic head includes a pair of magnetic cores each having a convexly processed part, the convexly processed parts being disposed opposite to each other with a magnetic gap member inserted therebetween, and a pair of glass blocks disposed on both sides... | 07/20/1999 |
| 5867887 | Manufacturing method for magnetic head A method of manufacturing a magnetic head by bonding a pair of magnetic cores to each other, wherein a residual stress in the magnetic cores upon bonding them together is controlled so that a permeability of the magnetic cores in the vicinity of a magneti... | 02/09/1999 |
| 5815910 | Method for manufacturing a magnetic head A method for manufacturing a magnetic head recording and reproducing information on or from magnetic recording media such as a video tape, includes the steps of preparing a chip core having a contact surface with which a magnetic tape contacts and on whic... | 10/06/1998 |
| 5806172 | Method for manufacturing a magnetic head In relation to the magnetic head using a polycrystalline Mn-Zn ferrite as a core material, a magnetic head manufacturing method is provided for preventing the generation of the post-recording noise which is a pulse noise generated immediately after the co... | 09/15/1998 |
| 5799389 | Method for producing magnetic head A head chip of a magnetic head is produced by a method in which magnetic core half blocks, each having plural track width delimiting grooves on its major surface and having a magnetic metal film of a soft magnetic metal material formed on the major surfac... | 09/01/1998 |
| 5761789 | Method of producing a magnetic head A method of making a magnetic head comprising: a first step of butting projection end faces of a pair of magnetic cores each of which is previously machined into a convex shape, through a magnetic gap member; a second step of forming notches which reach a... | 06/09/1998 |
| 5708543 | Magnetic head with glass used to bond together two core halves having a coefficient of thermal expansion less than that of the ferromagnetic oxide used to make the core halves A magnetic head according to the present invention can generate excellent readout output even with a reduced track width by controlling the stress applied to the half magnetic cores from the glass. The magnetic head comprises a pair of magnetic cores made... | 01/13/1998 |
| 5636433 | Method of manufacturing a magnetic head A method is provided for manufacturing magnetic heads having excellent magnetic properties comprising the steps of removing a certain thickness of a portion of at least one of the apexes of first and second core halves to form a space therebetween above a... | 06/10/1997 |
| 5628106 | Method of manufacturing magnetic head In a first glass bonding process, a silicon-dioxide layer is formed on either a first or second magnetic material by vacuum evaporation. The first or second magnetic material with the silicon-dioxide layer is dipped in a warm solution containing alkali so... | 05/13/1997 |
| 5584116 | Method for fabricating a magnetic head A method for fabricating a magnetic head includes providing a plurality of magnetic or non-magnetic substrates, forming a plurality of parallel V-shaped grooves symmetrically on two sides of each of the substrates, forming laminated magnetic films by depo... | 12/17/1996 |
| 5522126 | Method of manufacturing a composite magnetic head A ferrite plate and a ceramic plate are joined to each other by a glass layer interposed therebetween. The ferrite plate and the ceramic plate thus joined to each other by the glass layer serve as a trailing core in the form of a composite for use in a ma... | 06/04/1996 |
| 5428892 | Method of manufacturing a combined tunnel erase head In a method of manufacturing a tunnel erase type combined magnetic head core using a first core member having a predetermined pole height dimension defined by a surface on a magnetic gap formation side and an apex, and a predetermined back height dimensio... | 07/04/1995 |
| 5333372 | Method of manufacturing a magnetic head A method for manufacturing a magnetic head having a laminated core formed by alternately laminating metal magnetic layers and oxide layers on a non-magnetic substance base to a prescribed thickness. The method includes the steps of, positioning the lamina... | 08/02/1994 |
| 5305516 | Method of manufacturing flying magnetic heads A method of manufacturing a flying magnetic head of composite type using a magnetic thin film layer as a head core. The flying magnetic head comprises a slider, an I core bar bonded via a high-melting-point bonding glass layer to one end face of the slide... | 04/26/1994 |
| 5276959 | Method of manufacturing a magnetic tape head A magnetic head includes two substrates which are provided with magnetic cores of magnetic film on their surface and are bonded on a plane so that a magnetic gap is defined between the magnetic cores, an edge part of the magnetic cores with the magnetic g... | 01/11/1994 |
| 5208965 | Method for producing magnetic head having track regulation grooves formed at tape sliding surface A method for producing a magnetic head having a head core which includes a first head core half body (22) having a winding groove (22b) at one side surface thereof, a second head core half body (23) having one side surface joined with the side surface of ... | 05/11/1993 |
| 5208971 | Process of manufacturing a magnetic head A method of making a magnetic head wherein a metal material is sandwiched between non-magnetic substrates, including the steps of: forming a magnetic metal material at least on one side of a non-magnetic substrate; forming by sputtering a crystallization ... | 05/11/1993 |
| 5170301 | Magnetic head having core parts joined by low-melting point crystallized glass with composite gap A head core includes a pair of core parts made of a magnetic metallic material and bonded together by (1) a gap material which is a low-melting-point crystallized glass which serves as the bonding material and (2) non-magnetic material layers provided bet... | 12/08/1992 |
| 5161300 | Method for manufacture of magnetic head A method for manufacture of a bulk-type magnetic head capable of performing a frame recording operation. In sequential steps, coil grooves and track-width limit grooves substantially orthogonal thereto are formed in respective butt surfaces of a pair of m... | 11/10/1992 |
| 5146671 | Method of manufacturing floating type magnetic head A floating type composite magnetic head includes a head core fixed to a slider formed of nonmagnetic material. In the head core, a pair of magnetic core halves are abutted against each other with nonmagnetic material such as SiO2 or the like in... | 09/15/1992 |
| 5138508 | Magnetic head core A composite magnetic head core with a writing/reading track and two erasing tracks, including a first ferrite block, and a second and a third ferrite block bonded to opposite surfaces of the first block interposed therebetween. The opposite abutting surfa... | 08/11/1992 |
| 5084129 | Method of producing composite type, metal-in-gap magnetic head core A method of producing a composite type magnetic head core, WHEREIN a first and a second ferrite block are joined together into an integral ferrite structure, such that a metallic magnetic film is interposed between opposite portions of joining surfaces of... | 01/28/1992 |
| 5063653 | Method of producing a core for a magnetic head A method of producing a ferrite/Sendust composite core for a magnetic head, in which a metal film made of any one of metals of Zn, Cr, Fe, Cd, Co, Ni, Sn and Pb is formed on a surface, where a track of the core is formed, of a gapped bar composed of ferri... | 11/12/1991 |
| 5029380 | Method of making a composite core transducer A magnetic transducer and manufacturing method, where a transducer core is made from a composite block of magnetic material. The composite block has a first portion made of a first magnetic material, and a second portion made of a second magnetic material... | 07/09/1991 |
| 5022140 | Method of manufacturing magnetic head In a magnetic head a metal magnetic layer and a non-magnetic layer are sequentially formed on a pair of magnetic cores in which track widths are formed by a predetermined pitch. The metal magnetic layer and the non-magnetic layer formed outside the track ... | 06/11/1991 |
| 5020212 | Method of manufacturing a magnetic head A method of manufacturing a magnetic head includes a first step of forming rectilinear V grooves on the top surface of a substrate, a second step of forming magnetic films on slant faces of the V grooves, a third step of leveling the top surface of the su... | 06/04/1991 |
| 5016341 | A process for producing magnetic heads of the floating type A floating-type magnetic head comprising a slider and a core chip secured thereto. The core chip comprises a pair of core segments joined together with a gap spacer and a thin ferromagnetic metal film which are formed at the joint only over a portion of t... | 05/21/1991 |
| 5007158 | Method of manufacturing magnetic heads A magnetic head comprises a pair of magnetic core halves (1a, 1b), which are abutted with each other through a nonmagnetic material to define a magnetic gap (2), and ferromagnetic thin films (3a, 3b). The magnetic core halves (1a, 1b), which are formed of... | 04/16/1991 |
| 5003688 | Method of producing a magnetic head core having track-width defining cut outs formed on opposite side of a magnetic gap A magnetic head core including two ferrite blocks which are bonded together so as to form a magnetic path and which includes respective two protrusions protruding from the opposed surfaces thereof. The protrusions have opposed end faces cooperating with e... | 04/02/1991 |
| 4999904 | Method of manufacture of magnetic head A method for manufacture of a bulk-type magnetic head capable of performing a frame recording operation. A pair of magnetic core blocks with magnetic gaps formed in butt surfaces thereof are slit and comb-toothed to produce a pair of head element couplers... | 03/19/1991 |
| 4969253 | Method for producing a magnetic head A magnetic recording playback head and a method for producing the same having an improved wear resistance and resistance to chipping as well as an improved production rate. The head is formed from a pair of magnetic cores joined through a gap-forming film... | 11/13/1990 |
| 4947542 | Method of making a crystallized glass-bonded amorphous metal magnetic film-non-magnetic substrate magnetic head A magnetic head having head core constituted by a sandwiched magnetic material on both side thereof by a substrate materials such as, and the magnetic material and the substrate materials are bonded by crystallized glass containing crystals such as gahnit... | 08/14/1990 |
| 4928382 | Method of the production of a magnetic head In manufacturing a magnetic head having a magnetic circuit formed of magnetic material in which anisotropy can be induced, the magnetic head is processed by a first annealing process in a magnetic field for inducing anisotropy to generate an axis of easy ... | 05/29/1990 |
| 4914805 | Method of manufacturing a magnetic head having a plurality of magnetic gaps In the magnetic head having, in the magnetic recording medium sliding surface, a first magnetic gap followed by a second magnetic gap in the medium sliding direction, the medium sliding surface is provided with a plurality of parallel grooves to each othe... | 04/10/1990 |
