USRE37785E1 - Recording/reproducing separation type magnetic head - Google Patents
Recording/reproducing separation type magnetic head Download PDFInfo
- Publication number
- USRE37785E1 USRE37785E1 US09/598,770 US59877000A USRE37785E US RE37785 E1 USRE37785 E1 US RE37785E1 US 59877000 A US59877000 A US 59877000A US RE37785 E USRE37785 E US RE37785E
- Authority
- US
- United States
- Prior art keywords
- lead
- slider
- conductor
- coil
- recording
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4853—Constructional details of the electrical connection between head and arm
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3103—Structure or manufacture of integrated heads or heads mechanically assembled and electrically connected to a support or housing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/313—Disposition of layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3967—Composite structural arrangements of transducers, e.g. inductive write and magnetoresistive read
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/486—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives with provision for mounting or arranging electrical conducting means or circuits on or along the arm assembly
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/12—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
- G11B33/121—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules the apparatus comprising a single recording/reproducing device
- G11B33/122—Arrangements for providing electrical connections, e.g. connectors, cables, switches
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/17—Construction or disposition of windings
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/3116—Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks
Definitions
- the present invention relates to the positions of terminals of a recording/reproducing separation type magnetic head which copes with a high recording density, and the shape and structure of its lead-out conductors.
- JP-A-6-103530 disclosing a layout method of bonding pads capable of freely setting lead-out directions of wires. This method contemplates to accomplish a smaller thickness and a smaller size by obliquely disposing the bonding pads to an air bearing surface.
- a slider including a recording and reproducing separation type magnetic head having a magnetic induction type device for record and a magnetoresistance effect type device for reproduction connected through lead-out conductors to terminals includes that a proximal end of a first lead-out conductor is connected to a proximal end of a central winding portion of a coil used for record, extended to an upper surface opposite to an air bearing surface of the slider from the central winding portion, and extended to a lateral direction along the upper surface of the slider, a distal end of the first lead-out conductor is connected to one terminal used for the record; and a proximal end of a second lead-out conductor is connected to a distal end of the winding coil, and extended to an opposite direction against the first lead-out conductor along the upper surface of the slider, a distal end of the second lead-out conductor is connected to another terminal used for the record.
- a position of the distal end of the first lead-out conductor connected to the distal end of the coil used for the recording device may be located on a position where a length of the coil is the same length in winding both clockwise and counter-clockwise from the distal end to the proximal end of the central winding portion of the coil.
- the coil used for the recording device and the first and second lead-out conductors may be constructed that the coil is wound in one direction; the first and second lead-out conductors are formed substantially in parallel; a substantially middle portion of the first lead-out conductor is connected with the proximal end of the central winding portion of the coil; a substantially middle portion of the second lead-out conductor is connected with the distal end of the coil; respective both distal ends of the first and second lead-out conductors are connected to one and another terminals used for the record; a portion at the first lead-out conductor extended to one direction from a connected portion where the first lead-out conductor and the proximal end of the coil are connected is cut apart; and a portion at the second lead-out conductor extended to another direction opposite to the one direction from a connected portion where the second lead-out conductor and the distal end of the coil are connected is cut apart.
- the second aspect of an embodiment of the present invention is that a slider including a recording and reproducing separation type magnetic head having a magnetic induction type device for record and a magneto-resistance effect type device for reproduction connected through lead-out conductors to terminals includes that a proximal end of a first lead-out conductor is connected to a proximal end of a central winding portion of a coil used for record, extended to an upper surface opposite to an air nearing surface of the slider from the central winding portion, and extended to a lateral direction along the upper surface of the slider, a distal end of the first lead-out conductor is connected to one terminal used for the record; a proximal end of a second lead-out conductor is connected to a distal end of the winding coil, and extended to an opposite direction against the first lead-out conductor along the upper surface of the slider, a distal end of the second lead-out conductor is connected to another terminal used for the recording device; a proximal end of a third lead
- the respective proximal ends of the third and fourth lead-out conductors may be connected to the reproducing device and extended along close to an air bearing surface of the slider in a laterally opposite direction each other, the respective distal ends of the third and fourth lead-out conductors are connected to one and another terminals for the reproduction present within the terminals for the record close to the coil.
- the construction of the present invention described above can reduce the length of the lead-out conductors to be connected to the reproducing device, and can therefore reduce the electric resistance.
- the length of the coil is the same whether the winding direction of the coil may be clockwise or counter-clockwise. Therefore, even when the coil is wound either clockwise or counter-clockwise, the number of photomasks used for the production process of the terminals and the lead-out conductors can be reduced minimum and standardization of integrated circuits connected to the terminals becomes easier. Furthermore, the arrangement of such circuits can be made uniform. Even when the winding direction of the coil is unidirectional, the air bearing direction of the current flowing through the coil can be set either clockwise or counter-clockwise.
- FIG. 1 is a perspective view showing an example of a slider having a recording reproducing separation type magnetic head according to the present invention
- FIG. 2 is a front view represented by arrows II—II in FIG. 1;
- FIG. 3 is a front view when a coil is wound counter-clockwise in the slider
- FIG. 4 is a front view when the coil is wound clockwise in the slider
- FIGS. 5A to 5 C are explanatory views each showing an example where a current flows through a coil of a recording device and a lead-out conductor in a clockwise or counter-clockwise direction;
- FIG. 6 is a perspective view showing an example of the use of the recording/reproducing separation type magnetic head according to the present invention.
- FIG. 7A is a front view showing a slider according to the related art.
- FIG. 7B is a front view showing an example of the slider according to the present invention.
- FIG. 1 is a perspective view showing a recording/reproducing separation type magnetic head according to an embodiment of the present invention
- FIG. 2 is a front view of a slider front surface of the recording/reproducing separation type magnetic head represented by arrows II—II in FIG. 1 .
- reference numeral 1 denotes a recording/reproducing separation type magnetic head (hereinafter referred to as the “slider”)
- reference numeral 2 denotes a trailing surface
- reference numeral 3 denotes a magnetic transducer
- reference numeral 4 a denotes a terminal for a reproducing device
- reference numeral 4 b denotes a terminal for a recording device
- reference numeral 5 denotes a lead-out conductor for connecting the reproducing device to the terminal 4 a for the reproducing device
- reference numeral 6 denotes a lead-out conductor for connecting the recording device to the terminal 4 b for the recording device
- reference numeral 11 denotes a slider upper surface
- reference numeral 12 denotes slider side surfaces
- reference numeral 13 denotes a slider air bearing surface
- reference numeral 14 a denotes a terminal connection portion for the reproducing device
- reference numeral 14 b denotes a terminal connection 5 portion for the recording device.
- two terminals that is, the terminal 4 a for the reproducing device and the terminal 4 b for the recording device, are disposed on each side of the magnetic transducer 3 comprising the recording device and the reproducing device on the front surface 2 on the air outflow side of the slider 1 .
- This embodiment uses the magnetic induction type transducer 3 as a recording device and a magneto-resistance effect type transducer 10 (hereinafter, referring to an MR transducer; FIG. 7B) as a reproducing device.
- the construction shown in FIG. 2 will be explained.
- the MR transducer 10 (FIG. 7B) and the terminal 4 a are connected to each other by the lead-out conductor 5 and the magnetic transducer 3 and the terminal 4 b are connected by the lead-out conductor 6 .
- the lead-out conductor 6 is once extended directly above from the center of the magnetic transducer 3 (towards the slider upper surface 11 on the opposite side to the slider air bearing surface 13 ) and then to the right or the left. Since the lead-out conductor 6 for connecting the magnetic transducer 3 and the terminal 4 b extends on the slider upper surface side over the terminal connection portion 14 a between the terminal 4 a for the MR transducer 10 (FIG. 7B) and the lead-out conductor 5 in this way, it becomes possible to position the terminal 4 a for the MR transducer 10 (FIG. 7B) in the proximity of the magnetic transducer 3 and in the proximity of the slider air bearing surface 13 .
- FIGS. 7A and 7B comparatively show the pattern of the magneto-resistance effect type transducer 10 , the terminals 4 a and 4 b and the lead-out conductors 5 and 6 of the magnetic transducer and the MR transducer 10 of the related art and that of the present invention.
- pattern of lead-out conductors for the MR transducer 10 is represented by a solid line, and a dotted-line portion represents the positions of the terminal 4 b for the magnetic transducer and the lead-out conductor 6 that are formed by a post-treatment.
- the electrode resistance of the MR transducer 10 can be lowered by the decrement of the length of the lead-out conductor 5 with respect to the terminal 4 a, that is, by the degree corresponding to the oblique fine portion.
- FIG. 3 is a front view of the slider 1 to which a magnetic transducer 3 having a coil 7 , which is wound clockwise, is mounted, according to the present invention
- FIG. 4 is a front view of the slider 1 to which the magnetic transducer 3 having a coil 7 , which is wound counter-clockwise, is mounted according to the present invention.
- the coil 7 is formed through an insulating film such as alumina on the MR transducer 10 (FIG. 7B) inside the magnetic transducer 3 which is disposed in the manner described above, and an upper magnetic layer 15 such as permalloy is formed through an insulating film such as a photoresist, thereby forming the magnetic transducer 3 .
- one of the lead-out conductors 6 (the conductor on the right side) is extended directly above from the connection portion 6 a between the coil 7 and the lead-out conductor 6 (towards the slider upper surface 11 ), passes over the terminal connection side of the MR transducer 10 (FIG. 7B) on the slider upper surface side and is then connected to the terminal 4 b of the magnetic transducer 3 .
- the other lead-out conductor (the conductor on the left side) is extended from the connection portion 6 a between the coil 7 and the lead-out conductor 6 in the proximity of the slider upper surface of the magnetic transducer 3 , passes over the terminal connection portion of the MR transducer 10 (FIG. 7B) on the slider upper surface side and is connected to one of the terminals 4 b (the terminal on the left side) of the magnetic transducer 3 .
- the coil 7 has the same length. Therefore, no difference occurs in the electrical characteristics of the slider 1 , and the lead-out conductors 6 for connecting the magnetic transducer 3 to the terminal 4 b can be used in common. In consequence, the number of photomasks used in the production process may be only one with the exception of the cases where the coil 7 is wound clockwise and counter-clockwise.
- FIGS. 5A, 5 B and 5 C show the production process of the magnetic induction type structure except for the magneto-resistance effect type structure in relation to FIGS. 3 and 4.
- two lead-out conductors 6 are formed so as to extend between two terminals 4 b and 4 b at both ends of the coil 7 wound in one direction.
- a portion of one of the lead-out conductors 6 extending to the right direction from a junction where the lead-out conductor 6 is connected with the distal end of the coil 7 is cut apart by Ar ion milling process, and a portion of the other of the lead-out conductor 6 extending to the left direction from a junction where the lead-out conductor 6 is connected with the proximal end of the coil 7 is cut apart by the same process. In this way.
- a portion of one of the lead-out conductors 6 extending to the left direction from a junction where the lead-out conductor 6 is connected with the distal end of the coil 7 is cut apart by the process, and a portion of the other of the lead-out conductor 6 extending to the right direction from a junction where the lead-out conductor 6 is connected with the proximal end of the coil 7 is cut apart by the process.
- the lead-out conductors 6 can be cut apart by FIB (Focused Ion Beam) as well. In this way, the current can be allowed to flow both clockwise and counter-clockwise without changing the winding direction of the coil 7 , making specification of the components and their locations standardized.
- the coil 7 of the magnetic transducer shown in the drawings is composed of single layer, but it can be composed naturally of two layers.
- FIG, 6 is a perspective view of the embodiment wherein the recording/reproducing separation type magnetic head. That is, the slider 1 , is mounted on a medium. According to this construction, the head having excellent electrical characteristics can be packaged and a high reliability apparatus can be obtained economically.
- the lead-out conductors 5 connected to the terminals 4 a and 4 a for the MR transducer 10 in FIGS. 1 to 4 and 7 B are shown disposed substantially on the horizontal center line of the slider 1 because the terminals 4 b and 4 b for the magnetic transducer 3 and the terminals 4 a and 4 b for the MR transducer 10 are formed at the same horizontal position, but the terminals 4 b and 4 b and the terminals 4 a and 4 a are preferably formed on the side of the slider air bearing surface 13 as close as possible in order to reduce as much as possible the resistance of the lead-out conductors 5 .
- the lead-out conductors 5 are preferably as close as possible to the magneto-resistance effect type sensor or MR transducer 10 , they are preferably so formed as to extend along the air bearing surface 13 as close as possible thereto.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
A slider including a recording and reproducing separation type magnetic head includes that a proximal end of a first lead-out conductor is connected to a proximal end of a central winding portion of a coil sued for record, a distal end of the first lead-out conductor is connected to one terminal used for the record; a proximal end of second lead-out conductor is connected to a proximal end of the winding coil, and extended to an opposite direction against the first lead-out conductor along the upper surface of the slider, a distal end of the second lead-out conductor is connected to another terminal used for the recording device; a proximal end of a third lead-out conductor is connected to a reproducing device; a proximal end of a fourth lead-out conductor is connected to the reproducing device; the third lead-out conductor is extended along an air bearing surface of the slider in a lateral direction; the fourth lead-out conductor is extended along the air bearing surface of the slider in a direction opposite to the lateral direction; and the respective distal ends of the third and fourth lead-out conductors are connected to one and another terminals for the reproduction, making such an integrated circuit and the like connected to the terminals to be readily standardized and racking an electrode for a reproducing device short.
Description
The present invention relates to the positions of terminals of a recording/reproducing separation type magnetic head which copes with a high recording density, and the shape and structure of its lead-out conductors.
In connection with the pads of a magnetic head, there has been JP-A-6-103530 disclosing a layout method of bonding pads capable of freely setting lead-out directions of wires. This method contemplates to accomplish a smaller thickness and a smaller size by obliquely disposing the bonding pads to an air bearing surface.
It is an object of the present invention to provide a recording and reproducing separation type magnetic head capable of reducing an electrode resistance to be connected to a reproducing device and selecting a winding direction of a recording coil irrelevantly to a direction of a current flowing through terminals for a recording device.
The first aspect of an embodiment of the present invention for accomplishing the object described above is that a slider including a recording and reproducing separation type magnetic head having a magnetic induction type device for record and a magnetoresistance effect type device for reproduction connected through lead-out conductors to terminals includes that a proximal end of a first lead-out conductor is connected to a proximal end of a central winding portion of a coil used for record, extended to an upper surface opposite to an air bearing surface of the slider from the central winding portion, and extended to a lateral direction along the upper surface of the slider, a distal end of the first lead-out conductor is connected to one terminal used for the record; and a proximal end of a second lead-out conductor is connected to a distal end of the winding coil, and extended to an opposite direction against the first lead-out conductor along the upper surface of the slider, a distal end of the second lead-out conductor is connected to another terminal used for the record.
A position of the distal end of the first lead-out conductor connected to the distal end of the coil used for the recording device may be located on a position where a length of the coil is the same length in winding both clockwise and counter-clockwise from the distal end to the proximal end of the central winding portion of the coil.
The coil used for the recording device and the first and second lead-out conductors may be constructed that the coil is wound in one direction; the first and second lead-out conductors are formed substantially in parallel; a substantially middle portion of the first lead-out conductor is connected with the proximal end of the central winding portion of the coil; a substantially middle portion of the second lead-out conductor is connected with the distal end of the coil; respective both distal ends of the first and second lead-out conductors are connected to one and another terminals used for the record; a portion at the first lead-out conductor extended to one direction from a connected portion where the first lead-out conductor and the proximal end of the coil are connected is cut apart; and a portion at the second lead-out conductor extended to another direction opposite to the one direction from a connected portion where the second lead-out conductor and the distal end of the coil are connected is cut apart.
The second aspect of an embodiment of the present invention is that a slider including a recording and reproducing separation type magnetic head having a magnetic induction type device for record and a magneto-resistance effect type device for reproduction connected through lead-out conductors to terminals includes that a proximal end of a first lead-out conductor is connected to a proximal end of a central winding portion of a coil used for record, extended to an upper surface opposite to an air nearing surface of the slider from the central winding portion, and extended to a lateral direction along the upper surface of the slider, a distal end of the first lead-out conductor is connected to one terminal used for the record; a proximal end of a second lead-out conductor is connected to a distal end of the winding coil, and extended to an opposite direction against the first lead-out conductor along the upper surface of the slider, a distal end of the second lead-out conductor is connected to another terminal used for the recording device; a proximal end of a third lead-out conductor is connected to a reproducing device; a proximal end of a fourth lead-out conductor is connected to the reproducing device; the third lead-out conductor is extended along an air bearing surface of the slider in a lateral direction; the fourth lead-out conductor is extended along the air bearing surface of the slider in a direction opposite to the lateral direction; and the respective distal ends of the third and fourth lead-out conductors are connected to one and another terminals for the reproduction.
The respective proximal ends of the third and fourth lead-out conductors may be connected to the reproducing device and extended along close to an air bearing surface of the slider in a laterally opposite direction each other, the respective distal ends of the third and fourth lead-out conductors are connected to one and another terminals for the reproduction present within the terminals for the record close to the coil.
The construction of the present invention described above can reduce the length of the lead-out conductors to be connected to the reproducing device, and can therefore reduce the electric resistance. The length of the coil is the same whether the winding direction of the coil may be clockwise or counter-clockwise. Therefore, even when the coil is wound either clockwise or counter-clockwise, the number of photomasks used for the production process of the terminals and the lead-out conductors can be reduced minimum and standardization of integrated circuits connected to the terminals becomes easier. Furthermore, the arrangement of such circuits can be made uniform. Even when the winding direction of the coil is unidirectional, the air bearing direction of the current flowing through the coil can be set either clockwise or counter-clockwise.
FIG. 1 is a perspective view showing an example of a slider having a recording reproducing separation type magnetic head according to the present invention;
FIG. 2 is a front view represented by arrows II—II in FIG. 1;
FIG. 3 is a front view when a coil is wound counter-clockwise in the slider;
FIG. 4 is a front view when the coil is wound clockwise in the slider;
FIGS. 5A to 5C are explanatory views each showing an example where a current flows through a coil of a recording device and a lead-out conductor in a clockwise or counter-clockwise direction;
FIG. 6 is a perspective view showing an example of the use of the recording/reproducing separation type magnetic head according to the present invention;
FIG. 7A is a front view showing a slider according to the related art; and
FIG. 7B is a front view showing an example of the slider according to the present invention.
Hereinafter, preferred embodiments of the present invention will be described.
FIG. 1 is a perspective view showing a recording/reproducing separation type magnetic head according to an embodiment of the present invention, and FIG. 2 is a front view of a slider front surface of the recording/reproducing separation type magnetic head represented by arrows II—II in FIG. 1. In the drawings, reference numeral 1 denotes a recording/reproducing separation type magnetic head (hereinafter referred to as the “slider”), reference numeral 2 denotes a trailing surface, reference numeral 3 denotes a magnetic transducer, reference numeral 4a denotes a terminal for a reproducing device, reference numeral 4b denotes a terminal for a recording device, reference numeral 5 denotes a lead-out conductor for connecting the reproducing device to the terminal 4a for the reproducing device, reference numeral 6 denotes a lead-out conductor for connecting the recording device to the terminal 4b for the recording device, reference numeral 11 denotes a slider upper surface, reference numeral 12 denotes slider side surfaces, reference numeral 13 denotes a slider air bearing surface, reference numeral 14a denotes a terminal connection portion for the reproducing device, and reference numeral 14b denotes a terminal connection 5 portion for the recording device.
In the slider 1 shown in FIG. 1, two terminals, that is, the terminal 4a for the reproducing device and the terminal 4b for the recording device, are disposed on each side of the magnetic transducer 3 comprising the recording device and the reproducing device on the front surface 2 on the air outflow side of the slider 1. This embodiment uses the magnetic induction type transducer 3 as a recording device and a magneto-resistance effect type transducer 10 (hereinafter, referring to an MR transducer; FIG. 7B) as a reproducing device.
The construction shown in FIG. 2 will be explained. The MR transducer 10 (FIG. 7B) and the terminal 4a are connected to each other by the lead-out conductor 5 and the magnetic transducer 3 and the terminal 4b are connected by the lead-out conductor 6. The lead-out conductor 6 is once extended directly above from the center of the magnetic transducer 3 (towards the slider upper surface 11 on the opposite side to the slider air bearing surface 13) and then to the right or the left. Since the lead-out conductor 6 for connecting the magnetic transducer 3 and the terminal 4b extends on the slider upper surface side over the terminal connection portion 14a between the terminal 4a for the MR transducer 10 (FIG. 7B) and the lead-out conductor 5 in this way, it becomes possible to position the terminal 4a for the MR transducer 10 (FIG. 7B) in the proximity of the magnetic transducer 3 and in the proximity of the slider air bearing surface 13.
FIGS. 7A and 7B comparatively show the pattern of the magneto-resistance effect type transducer 10, the terminals 4a and 4b and the lead-out conductors 5 and 6 of the magnetic transducer and the MR transducer 10 of the related art and that of the present invention. In the front surface 2 shown in each of FIGS. 7A and 7B, pattern of lead-out conductors for the MR transducer 10 is represented by a solid line, and a dotted-line portion represents the positions of the terminal 4b for the magnetic transducer and the lead-out conductor 6 that are formed by a post-treatment. As can be seen from the pattern for the MR transducer 10 of the present invention shown in FIG. 7B, the electrode resistance of the MR transducer 10 can be lowered by the decrement of the length of the lead-out conductor 5 with respect to the terminal 4a, that is, by the degree corresponding to the oblique fine portion.
FIG. 3 is a front view of the slider 1 to which a magnetic transducer 3 having a coil 7, which is wound clockwise, is mounted, according to the present invention, and FIG. 4 is a front view of the slider 1 to which the magnetic transducer 3 having a coil 7, which is wound counter-clockwise, is mounted according to the present invention. In this slider 1, the coil 7 is formed through an insulating film such as alumina on the MR transducer 10 (FIG. 7B) inside the magnetic transducer 3 which is disposed in the manner described above, and an upper magnetic layer 15 such as permalloy is formed through an insulating film such as a photoresist, thereby forming the magnetic transducer 3.
As shown in FIGS. 3 and 4, one of the lead-out conductors 6 (the conductor on the right side) is extended directly above from the connection portion 6a between the coil 7 and the lead-out conductor 6 (towards the slider upper surface 11), passes over the terminal connection side of the MR transducer 10 (FIG. 7B) on the slider upper surface side and is then connected to the terminal 4b of the magnetic transducer 3. The other lead-out conductor (the conductor on the left side) is extended from the connection portion 6a between the coil 7 and the lead-out conductor 6 in the proximity of the slider upper surface of the magnetic transducer 3, passes over the terminal connection portion of the MR transducer 10 (FIG. 7B) on the slider upper surface side and is connected to one of the terminals 4b (the terminal on the left side) of the magnetic transducer 3.
As described above, even when the coil 7 is wound either clockwise or counter-clockwise, the coil 7 has the same length. Therefore, no difference occurs in the electrical characteristics of the slider 1, and the lead-out conductors 6 for connecting the magnetic transducer 3 to the terminal 4b can be used in common. In consequence, the number of photomasks used in the production process may be only one with the exception of the cases where the coil 7 is wound clockwise and counter-clockwise.
FIGS. 5A, 5B and 5C show the production process of the magnetic induction type structure except for the magneto-resistance effect type structure in relation to FIGS. 3 and 4.
In FIG. 5A, two lead-out conductors 6 are formed so as to extend between two terminals 4b and 4b at both ends of the coil 7 wound in one direction. In FIG. 5B, a portion of one of the lead-out conductors 6 extending to the right direction from a junction where the lead-out conductor 6 is connected with the distal end of the coil 7 is cut apart by Ar ion milling process, and a portion of the other of the lead-out conductor 6 extending to the left direction from a junction where the lead-out conductor 6 is connected with the proximal end of the coil 7 is cut apart by the same process. In this way. assuming that the direction of flowing current to one of the terminals 4b at one end is incorrect, two lead-out conductors 6 can be cut apart as described above, making a current direction constant. As a result, integrated circuits and other components connected to the terminals 4b are not required to replace with other new components when the connection is incorrect, avoiding cost increase. In FIG. 5C, a portion of one of the lead-out conductors 6 extending to the left direction from a junction where the lead-out conductor 6 is connected with the distal end of the coil 7 is cut apart by the process, and a portion of the other of the lead-out conductor 6 extending to the right direction from a junction where the lead-out conductor 6 is connected with the proximal end of the coil 7 is cut apart by the process. In this way, even though the direction of flowing current to one of the terminals 4b at one end is correct, the direction of flowing current to the coil 7 can be changed, making the design for slider 1 easy. In addition, the lead-out conductors 6 can be cut apart by FIB (Focused Ion Beam) as well. In this way, the current can be allowed to flow both clockwise and counter-clockwise without changing the winding direction of the coil 7, making specification of the components and their locations standardized.
The coil 7 of the magnetic transducer shown in the drawings is composed of single layer, but it can be composed naturally of two layers.
FIG, 6 is a perspective view of the embodiment wherein the recording/reproducing separation type magnetic head. that is, the slider 1, is mounted on a medium. According to this construction, the head having excellent electrical characteristics can be packaged and a high reliability apparatus can be obtained economically.
Incidentally, the lead-out conductors 5 connected to the terminals 4a and 4a for the MR transducer 10 in FIGS. 1 to 4 and 7B are shown disposed substantially on the horizontal center line of the slider 1 because the terminals 4b and 4b for the magnetic transducer 3 and the terminals 4a and 4b for the MR transducer 10 are formed at the same horizontal position, but the terminals 4b and 4b and the terminals 4a and 4a are preferably formed on the side of the slider air bearing surface 13 as close as possible in order to reduce as much as possible the resistance of the lead-out conductors 5. Particularly because the lead-out conductors 5 are preferably as close as possible to the magneto-resistance effect type sensor or MR transducer 10, they are preferably so formed as to extend along the air bearing surface 13 as close as possible thereto.
Claims (8)
1. A slider including a recording and reproducing magnetic head formed on a trailing surface of said a slider and connected to having a magnetic induction type device and a mnagneto- magneto-resistance effect type device for recording and reproducing information to and from a recording medium, connected through lead-out conductors to terminals, comprising:
a first lead-out conductor connected to a central end of a coil wound in a whirling-like manner as a recording device , a first conductor portion of said first lead-out conductor extending from the central end of said coil in a direction substantially perpendicular to a medium-opposing surface and extending toward an upper surface side of said slider which opposes said medium-opposing surface of said slider, and a second conductor portion of said first lead-out conductor extending from said first conductor portion and substantially parallel to the upper surface side in one lateral direction and is connected to a first recording device terminal provided at a first lateral side of said slider;
a second lead-out conductor connected to another end of said coil located at an outer portion of said coil, and extending substantially parallel to the upper surface side of said slider in the other lateral direction and is connected to a second recording device terminal provided at a second lateral side of said slider;
a third lead-out conductor connected to one end of a reproducing said magneto-resistance effect type device located with respect to said medium opposing trailing surface of said slider, and having a first conductor portion extending toward the upper surface side of said slider in a direction substantially perpendicular to said medium opposing surface, and a second conductor portion extending from said first conductor portion substantially parallel to the upper surface side in the one lateral direction but closer to said medium opposing surface than eider either of said first and second lead-out conductors, and is connected to a third reproducing device terminal which is closer to a center of said slider than either of said first and second recording device terminals; and
a fourth lead-out conductor connected to the other end of said reproducing magneto-resistance effect type device, and having a first conductor portion extending toward the upper surface side of said slider in the a direction substantially perpendicular to said medium opposing surface, and a second conductor portion extending from said first conductor portion substantially parallel to the upper surface side in the other lateral direction but closer to said medium opposing surface than either of said first and second lead-out conductors, and is connected to a fourth reproducing device terminal which is closer to the center of said slider than either of said first and second recording device terminals.
2. A slider recording and reproducing magnetic head according to claim 1 , wherein said first lead-out conductor and said second lead-out conductor are arranged such that a length of said coil is the same whether a clockwise wound coil or a counter-clockwise wound coil is used with said first lead-out conductor and said second lead-but lead-out conductor.
3. A slider recording and reproducing magnetic head according to claim 1 , wherein said coil and said first and second lead-out conductors are constructed such that: said coil is wound in one direction; said first and second lead-out conductors are formed substantially in parallel; a substantially middle portion of said first lead-out conductor is connected with a proximal end of a central winding portion of said coil; a substantially middle portion of said second lead-out conductor is connected with a distal end of said coil; respective both digital distal ends of said first and second lead-out conductors are connected to said first recording device terminal and said second recording device terminal used for the recording magnetic head; a portion of said first lead-out conductor extended to said other lateral direction said second recording device terminal from a connected portion where said first lead-out conductor and said proximal end of said coil are connected is cut apart; and a portion of said second lead-out conductor extended to said lateral direction opposite to said other lateral direction said first recording device terminal from a connected portion where said second lead-out conductor and said distal end of said coil are connected is cut apart.
4. A slider recording and reproducing magnetic head according to claim 1 5, wherein said coils and said first and second lead-out conductors are constructed such that: said first and second lead-out conductors are formed substantially in parallel; a substantially middle portion of said first lead-out conductor is connected with a proximal end of a central winding portion of said coils an end of said two-layered coil; a substantially middle portion of said second lead-out conductor is connected with a distal end of said coils another end of said two-layered coil; respective both distal ends of said first and second lead-out conductors are connected to said first recording device terminal and said second recording device terminal used for said recording head; a portion of said first lead-out conductor extended to said other lateral direction said second recording device terminal from a connected portion where said first lead-out conductor and said proximal end of said coils end of said two-layered coil are connected is cut apart; and a portion of said second lead-out conductor extended to said lateral direction opposite to said other lateral direction said first recording device terminal from a connected portion where said second lead-out conductor and said distal end of said coils another end of said two-layered coil are connected is cut apart.
5. A slider including a recording and reproducing magnetic head formed on a trailing surface of said a slider and connected to having a magnetic induction type device and a magnetoresistance magneto-resistance effect type device for recording and reproducing information to and from a recording medium connected through lead-out conductors to terminals, comprising:
a first lead-out conductor connected to an end of a two-layered coil that has a first-layered coil connected to a second-layered coil at central ends of both a said first-layered coil and a second-layered coil coils which are wound in a whirling-like manner as a and used for recording device, ;
a first conductor portion of said first lead-out conductor extending from said central ends of said coils end of said coil in a direction substantially perpendicular to a medium-opposing surface and extending toward an upper surface side which opposes a medium opposing surface of said slider, and a second conductor portion of said first lead-out conductor extending from said first conductor portion and substantially parallel to said upper surface side of said slider in one lateral direction and is connected to a first recording device terminal provided at a first lateral side of said slider;
a second lead-out conductor connected to outer peripheral another end of said two-layered coil than said first-layered coil connected to said second-layered coil at central ends of both said first-layered coil and said second-layered coil coils, and extending substantially parallel to said upper surface side of said slider in the other lateral direction, and is connected to a second recording device terminal provided at a second lateral side of said slider;
a third lead-out conductor connected to one of a reproducing said magneto-resistance effect type device located with respect to said medium opposing trailing surface of said slider, and having a first conductor portion extending toward the upper surface side of said slider in a direction substantially perpendicular to said medium opposing surface, and a second conductor portion extending from said first conductor portion substantially parallel to the upper surface side in the one lateral direction but closer to said medium opposing surface than either of said first and second lead-out conductors, and is connected to a third reproducing device terminal which is closer to a center of said slider than either of said first and second recording device terminals; and
a fourth lead-out conductor connected to the other end of said reproducing magneto-resistance effect type device, and having a first conductor portion extending toward the upper surface side of said slider in a direction substantially perpendicular to said medium opposing surface and a second conductor portion extending from said first conductor portion substantially parallel to the upper surface side in the other lateral direction but closer to said medium opposing surface than either of said first and second lead-out conductors, and is connected to a fourth reproducing device terminal which is closer to a center of said slider than either of said first and second recording device terminals.
6. A slider recording and reproducing magnetic head according to claim 5 , wherein said first lead-out conductor and said second lead-out conductor are arranged such that lengths of said coils are the same whether a clockwise wound coil or a counter-clockwise colt wound coil is used with said first lead-out conductor and said second lead-out conductor.
7. A recording and reproducing magnetic head formed on a trailing surface of a slider having a magnetic induction type device and a magneto-resistance effect type device for recording and reproducing information to and from a recording medium, connected through lead-out conductors to terminals, comprising:
a first lead-out conductor connected to a central end of a coil wound in a whirling-like manner and used for recording, a first conductor portion of said first lead-out conductor extending from the central end of said coil in a direction substantially perpendicular to a medium opposing surface and extending toward an upper surface side which opposes a medium opposing surface of said slider, and a second conductor portion of said first lead-out conductor extending from said first conductor portion and substantially parallel to the upper surface side and is connected to a first recording device terminal provided at a lateral side of said slider;
a second lead-out conductor connected to another end of said coil located at an outer portion of said coil, and extending substantially parallel to the upper surface side of said slider, and is connected to a second recording device terminal provided at a lateral side of said slider;
a third lead-out conductor connected to one end of a magneto-resistance effect type device located with respect to said trailing surface of said slider, and having a first conductor portion extending toward the upper surface side in a direction substantially perpendicular to said medium opposing surface which opposes said medium opposing surface of said slider, and a second conductor portion extending from said first conductor portion substantially parallel to the upper surface side but closer to said medium opposing surface than either of said first and second lead-out conductors, and is connected to a third reproducing device terminal which is closer to said magneto-resistance effect type device than either of said first and second recording device terminals; and
a fourth lead-out conductor connected to the other end of said magneto-resistance affect type device, and having a first conductor portion extending toward the upper surface side in a direction substantially perpendicular to said medium opposing surface, and a second conductor portion extending from said first conductor portion substantially parallel to the upper surface side. In a lateral direction but closer to said medium opposing surface than either of said first and second lead-out conductors, and is connected to a fourth reproducing device terminal which is closer to said magneto-resistance effect type device than either of said first and second recording device terminals.
8. A recording and reproducing magnetic head formed on a trailing surface of a slider having a magnetic induction type device and a magneto-resistance effect type device for recording and reproducing information to and from a recording medium, connected through lead-out conductors to terminals, comprising:
a first lead-out conductor connected to an end of a two-layered coil that has a first-layered coil connected to a second-layered coil at the central ends of both said first- and second-layered coils which are wound in a whirling-like manner and used for recording, a first conductor portion of said first lead-out conductor extending from said end of said coil in a direction substantially perpendicular to a medium opposing surface and extending toward an upper surface side which opposes medium opposing surface of said slider, and a second conductor portion of said first lead-out conductor extending from said first conductor portion and substantially parallel to said upper surface side of said slider, and is connected to a first recording device terminal provided at a lateral side of said slider;
a second lead-out conductor connected to another end of said two-layered coil than said first layered coil connected to said second-layered coil at central ends of both said first- and second-layered coils, and extending substantially parallel to said upper surface side of said slider, and is connected to a second recording device terminal provided at a lateral side of said slider;
a third lead-out conductor connected to one end of said magneto-resistance effect type device located with respect to said trailing surface of said slider, and having a first conductor portion extending toward the upper surface side in a direction substantially perpendicular to said medium opposing surface, and a second conductor portion extending from said first conductor portion substantially parallel to the upper surface side but closer to said medium opposing surface than either of said first and second lead-out conductors, and is connected to a third reproducing device terminal which is closer to said magneto-resistance effect type device than either of said first and second recording device terminals; and
a fourth lead-out conductor connected to other end of said magneto-resistance effect type device, and having a first conductor portion extending toward the upper surface side in the direction substantially perpendicular to said medium opposing surface, and a second conductor portion extending from said first conductor portion in a lateral direction but closer to said medium opposing surface than either of said first and second lead-out conductors, and is connected to a fourth reproducing device, terminal which is closer to said magneto-resistance effect type device than either of said first and second recording terminals.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/598,770 USRE37785E1 (en) | 1995-12-15 | 2000-06-20 | Recording/reproducing separation type magnetic head |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7-327497 | 1995-12-15 | ||
JP7327497A JPH09167315A (en) | 1995-12-15 | 1995-12-15 | Thin film magnetic head functioning separately for recording/reproducing |
US08/760,868 US5894380A (en) | 1995-12-15 | 1996-12-09 | Recording/reproducing separation type magnetic head |
US09/598,770 USRE37785E1 (en) | 1995-12-15 | 2000-06-20 | Recording/reproducing separation type magnetic head |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/760,868 Reissue US5894380A (en) | 1995-12-15 | 1996-12-09 | Recording/reproducing separation type magnetic head |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE37785E1 true USRE37785E1 (en) | 2002-07-09 |
Family
ID=18199815
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/760,868 Ceased US5894380A (en) | 1995-12-15 | 1996-12-09 | Recording/reproducing separation type magnetic head |
US09/598,770 Expired - Fee Related USRE37785E1 (en) | 1995-12-15 | 2000-06-20 | Recording/reproducing separation type magnetic head |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/760,868 Ceased US5894380A (en) | 1995-12-15 | 1996-12-09 | Recording/reproducing separation type magnetic head |
Country Status (4)
Country | Link |
---|---|
US (2) | US5894380A (en) |
JP (1) | JPH09167315A (en) |
KR (1) | KR100246019B1 (en) |
CN (1) | CN1077994C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060181808A1 (en) * | 2005-02-14 | 2006-08-17 | Hitachi Global Storage Technologies Netherlands B.V. | Compact thin-film magnetic head and magnetic disk drive using the same |
US20070230056A1 (en) * | 2006-04-03 | 2007-10-04 | Beach Robert S | Slider incorporating heaters and ELGs and method of fabrication |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6125014A (en) * | 1998-06-26 | 2000-09-26 | Read-Rite Corporation | Via-less connection using interconnect traces between bond pads and a transducer coil of a magnetic head slider |
JP2000195016A (en) * | 1998-12-24 | 2000-07-14 | Alps Electric Co Ltd | Thin film magnetic head |
JP2000276709A (en) * | 1999-03-25 | 2000-10-06 | Alps Electric Co Ltd | Thin film magnetic head and its manufacture |
KR100401020B1 (en) * | 2001-03-09 | 2003-10-08 | 앰코 테크놀로지 코리아 주식회사 | Stacking structure of semiconductor chip and semiconductor package using it |
US7002779B2 (en) * | 2002-05-02 | 2006-02-21 | Seagate Technology Llc | Thermal pole-tip recession/slide shape variation reduction |
JP2005293663A (en) * | 2004-03-31 | 2005-10-20 | Tdk Corp | Composite thin film magnetic head |
US7675180B1 (en) | 2006-02-17 | 2010-03-09 | Amkor Technology, Inc. | Stacked electronic component package having film-on-wire spacer |
US20080237824A1 (en) * | 2006-02-17 | 2008-10-02 | Amkor Technology, Inc. | Stacked electronic component package having single-sided film spacer |
US7633144B1 (en) | 2006-05-24 | 2009-12-15 | Amkor Technology, Inc. | Semiconductor package |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4504880A (en) * | 1982-08-09 | 1985-03-12 | International Business Machines Corporation | Integrated magnetic recording head assembly including an inductive write subassembly and a magnetoresistive read subassembly |
US4555740A (en) * | 1983-04-04 | 1985-11-26 | Hewlett-Packard Company | Thin film transducer head for inductive recording and magnetoresistive reading |
US5001591A (en) * | 1988-06-03 | 1991-03-19 | Alps Electric Co., Ltd. | Thin film magnetic head |
JPH06103530A (en) * | 1992-09-21 | 1994-04-15 | Alps Electric Co Ltd | Thin film magnetic head |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2676608B1 (en) * | 1991-05-17 | 1993-09-03 | France Telecom | COLOR IMAGE CODING METHOD WITH HIGH FILTERING RATE WITHOUT FILTERING, CORRESPONDING DECODING METHOD, ENCODER, DECODER AND APPLICATION. |
-
1995
- 1995-12-15 JP JP7327497A patent/JPH09167315A/en active Pending
-
1996
- 1996-12-09 US US08/760,868 patent/US5894380A/en not_active Ceased
- 1996-12-13 CN CN96121552A patent/CN1077994C/en not_active Expired - Fee Related
- 1996-12-14 KR KR1019960065706A patent/KR100246019B1/en not_active IP Right Cessation
-
2000
- 2000-06-20 US US09/598,770 patent/USRE37785E1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4504880A (en) * | 1982-08-09 | 1985-03-12 | International Business Machines Corporation | Integrated magnetic recording head assembly including an inductive write subassembly and a magnetoresistive read subassembly |
US4555740A (en) * | 1983-04-04 | 1985-11-26 | Hewlett-Packard Company | Thin film transducer head for inductive recording and magnetoresistive reading |
US5001591A (en) * | 1988-06-03 | 1991-03-19 | Alps Electric Co., Ltd. | Thin film magnetic head |
JPH06103530A (en) * | 1992-09-21 | 1994-04-15 | Alps Electric Co Ltd | Thin film magnetic head |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060181808A1 (en) * | 2005-02-14 | 2006-08-17 | Hitachi Global Storage Technologies Netherlands B.V. | Compact thin-film magnetic head and magnetic disk drive using the same |
US7782568B2 (en) | 2005-02-14 | 2010-08-24 | Hitachi Global Storage Technologies Netherlands B.V. | Compact thin-film magnetic head and magnetic disk drive using the same |
US20070230056A1 (en) * | 2006-04-03 | 2007-10-04 | Beach Robert S | Slider incorporating heaters and ELGs and method of fabrication |
Also Published As
Publication number | Publication date |
---|---|
CN1077994C (en) | 2002-01-16 |
JPH09167315A (en) | 1997-06-24 |
KR970050218A (en) | 1997-07-29 |
US5894380A (en) | 1999-04-13 |
KR100246019B1 (en) | 2000-03-02 |
CN1159640A (en) | 1997-09-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
USRE37785E1 (en) | Recording/reproducing separation type magnetic head | |
JPH07262520A (en) | Thin-film magnetic head | |
US5173826A (en) | Thin film head with coils of varying thickness | |
US5856898A (en) | Spiral coil pattern including same layer spiral patterns suitable for use in a thin film head | |
JPH10255239A (en) | Inductive/mr combined thin film magnetic head | |
JPH0887723A (en) | Magnetic head with laminated multilayer magnetoresistor in longitudinal direction | |
JP3362818B2 (en) | Spin valve magnetoresistive transducer and magnetic recording device | |
US4700252A (en) | Magnetic thin film head | |
JPH08212513A (en) | Magnetic recording/read head and its manufacture | |
US6812543B2 (en) | Micro device that generates a magnetomotive force in a long direction | |
KR100280300B1 (en) | Combined read / write magnetic head | |
US6507455B1 (en) | Thin film magnetic head capable of reducing coil resistance value of entire coil layer formed between core layers | |
JPS61194620A (en) | Thin film magnetic head | |
JPS61126618A (en) | Thin film head of magnetoresistance effect type | |
JPH05101337A (en) | Thin film magnetic head | |
JPH1145413A (en) | Composite thin film magnetic head | |
JP2509968B2 (en) | Multi-track magnetoresistive effect magnetic head | |
JP3647133B2 (en) | Inductance element | |
JPH01166309A (en) | Thin film magnetic head | |
JP2740599B2 (en) | Thin film magnetic head | |
JPH11120523A (en) | Magnetoresistive effect head | |
JP2863552B2 (en) | Thin-film magnetic head and recording / reproducing apparatus using this thin-film magnetic head | |
JP2878738B2 (en) | Recording / reproducing thin film magnetic head | |
JP2004062941A (en) | Thin film magnetic head assembly and magnetic recording/reproducing device | |
JP2602203B2 (en) | Magnetoresistive magnetic head |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FPAY | Fee payment |
Year of fee payment: 4 |
|
AS | Assignment |
Owner name: HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD., J Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HITACHI, LTD.;REEL/FRAME:014788/0751 Effective date: 20031120 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees |