Abstract: A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. A concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.

Abstract: A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. A concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.

Abstract: A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. A concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.

Abstract: To accurately decrease the gap depth between an upper pole layer and a lower pole layer and the front-end portion width of the upper pole layer. A thin-film magnetic head of the present invention is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. Moreover, a concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.

Abstract: To accurately decrease the gap depth between an upper pole layer and a lower pole layer and the front-end portion width of the upper pole layer. A thin-film magnetic head of the present invention is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. Moreover, a concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.

Abstract: A thin film magnetic head includes a recording pole layer that is divided into a tip portion, a wide rear portion, a flare portion, and a yoke portion as viewed from the air bearing surface (ABS). The tip portion and the wide rear portion directly contact a write gap layer. Part of the wide rear portion has a greater width that the tip portion. The wide rear portion is provided between the tip portion and the flare portion to reduce magnetic reluctance. Accordingly, it is possible to improve the pattern accuracy of the tip portion width by providing the flare portion, which reflects a large quantity of light, far from the ABS, while preventing an increase of the magnetic reluctance.

Abstract: A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. A concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.

Abstract: To accurately decrease the gap depth between an upper pole layer and a lower pole layer and the front-end portion width of the upper pole layer.

Abstract: The present invention is intended to improve the linear response characteristics of resistance changes to the magnetic field. According to the present invention, an MR sensing element 10 comprises a sensing pattern 12 consisting of a magnetoresistive layer whose resistance changes in accordance with the direction of magnetization M, and an electrode layer for applying a sense current J to the sensing pattern 12. The sensing pattern 12 is formed to be of circular shape. According to the present invention, since the demagnetic field within the sensing pattern is made constant with respect to the direction of the magnetization M, the improved linear response characteristics of resistance changes to an external magnetic field Hs can be realized.

Abstract: To prevent the high-frequency characteristic from deteriorating due to a narrow track. A thin-film magnetic head of the present invention is produced by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element facing to an ABS plane, a shared pole layer serving as an upper shielding layer and a lower pole layer, and a write gap layer laminated in order on an insulating substrate, by forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of the ABS plane, and by forming an upper pole layer on the write gap layer and second flattening layer nearby the ABS plane. Because magnetic easy axis of the upper pole layer along the ABS plane is oriented in the thickness direction of the upper pole layer, the high-frequency characteristic in the magnetization rotation mode is obtained.

Abstract: In order to keep satisfactory the state of contact between a magnetic tape and a magnetic head, dust having accumulated between bumps of a magnetic head having a plurality of bumps is to be removed.

Abstract: The present invention provides a yoke type magnetoresistive (MR) composite thin film head having no other gap than the recording/reproducing gap so as to increase the recording characteristics and reproduction characteristics. A magnetic gap 70 is formed between a front portion of an upper pole 6 and a front portion of a lower pole 1, whereas a rear portion of the upper pole 6 and a rear portion of the lower pole 1 are magnetically connected to form a magnetic flux path. A mesa pattern 2 is provided apart from the magnetic gap 70 and a magnetoresistive element (MR pattern) 3 is arranged on a front slope 2a of the mesa pattern 2. The upper pole 6 and the lower pole 1 are magnetically bridged via the MR element 3, so as to form a separate magnetic flux flow path via the MR element 3. This separate magnetic flux flow path is used for reproduction of a magnetic recording information. A write-in coil is arranged on the mesa pattern 2.

Abstract: To prevent the high-frequency characteristic from deteriorating due to a narrow track. A thin-film magnetic head of the present invention is produced by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element facing to an ABS plane, a shared pole layer serving as an upper shielding layer and a lower pole layer, and a write gap layer laminated in order on an insulating substrate, by forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of the ABS plane, and by forming an upper pole layer on the write gap layer and second flattening layer nearby the ABS plane. Because magnetic easy axis of the upper pole layer along the ABS plane is oriented in the thickness direction of the upper pole layer, the high-frequency characteristic in the magnetization rotation mode is obtained.

Abstract: To prevent the high-frequency characteristic from deteriorating due to a narrow track. A thin-film magnetic head of the present invention is produced by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element facing to an ABS plane, a shared pole layer serving as an upper shielding layer and a lower pole layer, and a write gap layer laminated in order on an insulating substrate, by forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of the ABS plane, and by forming an upper pole layer on the write gap layer and second flattening layer nearby the ABS plane. Because magnetic easy axis of the upper pole layer along the ABS plane is oriented in the thickness direction of the upper pole layer, the high-frequency characteristic in the magnetization rotation mode is obtained.

Abstract: The present invention provides a yoke type magnetoresistive (MR) composite thin film head having no other gap than the recording/reproducing gap so as to increase the recording characteristics and reproduction characteristics. A magnetic gap 70 is formed between a front portion of an upper pole 6 and a front portion of a lower pole 1, whereas a rear portion of the upper pole 6 and a rear portion of the lower pole 1 are magnetically connected to form a magnetic flux path. A mesa pattern 2 is provided apart from the magnetic gap 70 and a magnetoresistive element (MR pattern) 3 is arranged on a front slope 2a of the mesa pattern 2. The upper pole 6 and the lower pole 1 are magnetically bridged via the MR element 3, so as to form a separate magnetic flux flow path via the MR element 3. This separate magnetic flux flow path is used for reproduction of a magnetic recording information. A write-in coil is arranged on the mesa pattern 2.

Abstract: Since the magnetic field response sensitivity of a resistance change &dgr;R is deteriorated to a low value when a longitudinal bias magnetic field is applied, a structure by which a higher magnetic field response sensitivity is obtained is realized. A giant magnetoresistive sensing element for detecting a magnetic field from a magnetic disk to read a signal includes a magnetic fixed layer magnetized in parallel to a signal magnetic field direction, an electrically conductive layer to which a current is supplied from the exterior, for detecting a resistance change which is used for reading a signal, and a magnetic free layer which vibratingly rotates a direction of magnetization thereof due to the signal magnetic field from the magnetic disk, wherein the magnetic easy axis of the magnetic free layer is in parallel to the signal magnetic field direction, and the MR sensitivity in the signal magnetic field direction is higher than the MR sensitivity to a direction perpendicular to the signal magnetic field.

Abstract: A thin film magnetic head has first and second magnetic pole layers and, a thin film coil, a magnetic gap layer, and a magnetically insulating layer. The magnetically insulating layer is disposed along a plane facing a recording medium, and divides at least one of the front end section of the first magnetic pole layer and the frond end section of the second magnetic pole layer into a plurality of sub-sections. An additional magnetic pole layer may be provided on at least one of the front end section of the first magnetic pole layer and the front end section of the second magnetic pole layer with a magnetically insulating layer being interposed therebetween. The thin film magnetic head thus fabricated enables the reduction of undershoots to appear at both sides of a main peak of the waveform a signal reproduced by the magnetic head.

Abstract: An MR head in which a spin-valve device unit is formed into a horizontal shape and an anti-ferromagnetic layer is not required, is provided. The spin-valve device unit includes a first ferromagnetic layer, one and another permanent magnetic layers arranged on both end portions of the first ferromagnetic layer and creating a magnetic path from one of the end portions of the first ferromagnetic layer toward the other thereof. A second ferromagnetic layer is provided above the first ferromagnetic layer through a non-magnetic conductive layer and a soft magnetic layer is provided above the second ferromagnetic layer through a non-magnetic layer. The both end portions of the second ferromagnetic layer are designed to contact with outer end portions of the permanent magnet layers, respectively. Surfaces of the permanent magnet layers are perpendicular to the surface of a magnetic storage medium and to the magnetization direction thereof.

Abstract: A thin film magnetic head includes lower and upper magnetic cores, an upper magnetic core distal end portion, a magnetic gap layer, coil layers, and insulating layers. The lower magnetic core has a distal end portion facing a magnetic head floating surface. The upper magnetic core distal end portion opposes the distal end portion of the lower magnetic core through a magnetic gap. The lower magnetic core and the upper magnetic head distal end portion are heated at a temperature T1 to have a saturation magnetic flux density BS1. The upper magnetic core magnetically connects the lower magnetic core and the upper magnetic core distal end portion to constitute a magnetic core and is heated at a temperature T2 to have a saturation magnetic flux density BS2. Note that T2<T1 and BS2<BS1. The nonmagnetic layer is formed between the lower and upper magnetic cores to constitute the magnetic gap.

Abstract: A thin film magnetic head has first and second magnetic pole layers and, a thin film coil, a magnetic gap layer, and a magnetically insulating layer. The magnetically insulating layer is disposed along a plane facing a recording medium, and divides at least one of the front end section of the first magnetic pole layer and the frond end section of the second magnetic pole layer into a plurality of sub-sections. An additional magnetic pole layer may be provided on at least one of the front end section of the first magnetic pole layer and the front end section of the second magnetic pole layer with a magnetically insulating layer being interposed therebetween, The thin film magnetic head thus fabricated enables the reduction of undershoots to appear at both sides of a main peak of the waveform a signal reproduced by the magnetic head.