Magnetic head and magnetic recording device

Abstract

We provide a magnetic head that improves performance. [Solution] The magnetic head 110 includes first and second elements EL1 and EL2, first and second shield terminals 21a and 22a, first and second opposing shield terminals 21b and 22b, first and second side shield terminals 21s and 22s, and a common side shield terminal 20T. The first shield terminal is electrically connected to the first shield 41a of the first element and to the first opposing shield terminal. The second shield terminal is electrically connected to the second shield 42a of the second element, and the second opposing shield terminal is electrically connected to the second opposing shield 42b. The first side shield terminal is electrically connected to the first side shield 41s, the second side shield terminal is electrically connected to the second side shield 42s, and the common side shield terminal is electrically connected to the first opposing side shield 41r and the second opposing side shield 42r.

Description

Technical Field

[0001] Embodiments of the present invention relate to a magnetic head and a magnetic recording device.

Background Art

[0002] Information is recorded on a magnetic recording medium such as an HDD (Hard Disk Drive) using a magnetic head including a magnetic sensor. In the magnetic head, performance improvement is desired.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Embodiments of the present invention provide a magnetic head and a magnetic recording device capable of improving performance.

Means for Solving the Problems

[0005] According to the embodiment, the magnetic head includes a first element, a second element, a first shield terminal, a first opposing shield terminal, a second shield terminal, a second opposing shield terminal, a first side shield terminal, a second side shield terminal, and a common side shield terminal. The first element includes a first shield, a first opposing shield, a first side shield, a first opposing side shield, and a first magnetic member. The direction from the first shield to the first opposing shield is along the first direction. The first intersecting direction from the first opposing side shield to the first side shield intersects the first direction. The first magnetic member is provided between the first shield and the first opposing shield, and between the first side shield and the first opposing side shield. The second element includes a second shield, a second opposing shield, a second side shield, a second opposing side shield, and a second magnetic member. The direction from the second shield to the second opposing shield, or from the second opposing shield to the second shield, is along the first direction. The second intersecting direction from the second opposing side shield to the second side shield intersects with the first direction. The second magnetic member is provided between the second shield and the second opposing shield, and between the second side shield and the second opposing side shield. The first shield terminal is electrically connected to the first shield. The first opposing shield terminal is electrically connected to the first opposing shield. The second shield terminal is electrically connected to the second shield. The second opposing shield terminal is electrically connected to the second opposing shield. The first side shield terminal is electrically connected to the first side shield. The second side shield terminal is electrically connected to the second side shield. The common side shield terminal is electrically connected to the first opposing side shield and the second opposing side shield. [Brief explanation of the drawing]

[0006] [Figure 1] Figure 1 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 2]Figure 2 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 3] Figure 3 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 4] Figure 4 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 5] Figure 5 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 6] Figure 6 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 7] Figure 7 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 8] Figure 8 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 9] Figure 9 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 10] Figure 10 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 11] Figure 11 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 12] Figure 12 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 13] Figure 13 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 14] Figure 14 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 15] Figure 15 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 16] Figure 16 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 17] Figure 17 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 18] Figure 18 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 19] FIG. 19 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. [Figure 20] FIG. 20 is a schematic perspective view illustrating a magnetic head and a magnetic recording apparatus according to the third embodiment. [Figure 21] FIG. 21 is a schematic perspective view illustrating a part of a magnetic recording apparatus according to an embodiment. [Figure 22] FIG. 22 is a schematic perspective view illustrating a magnetic recording apparatus according to an embodiment. [Figure 23] FIGS. 23(a) and 23(b) are schematic perspective views illustrating a part of a magnetic recording apparatus according to an embodiment. MODE FOR CARRYING OUT THE INVENTION

[0007] Hereinafter, each embodiment of the present invention will be described with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the ratio of the sizes between parts, etc. are not necessarily the same as those in reality. Even when representing the same part, the dimensions and ratios may be represented differently in the drawings. In this specification and each figure, elements similar to those described above with respect to the previously presented figures are denoted by the same reference numerals, and detailed descriptions thereof are omitted as appropriate.

[0008] (First Embodiment) FIG. 1 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in FIG. 1, the magnetic head 110 according to the embodiment includes a first element EL1, a second element EL2, and a plurality of terminals. The magnetic head 110 includes a reproducing section 70. The first element EL1, the second element EL2, and the plurality of terminals are included in the reproducing section 70.

[0009] The first element EL1 includes a first shield 41a, a first opposing shield 41b, a first side shield 41s, a first opposing side shield 41r, and a first magnetic member 11. The second element EL2 includes a second shield 42a, a second opposing shield 42b, a second side shield 42s, a second opposing side shield 42r, and a second magnetic member 12.

[0010] The direction from the first shield 41a to the first opposing shield 41b is along the first direction D1. The first direction D1 is taken as the X-axis direction. One direction perpendicular to the X-axis direction is taken as the Y-axis direction. A direction perpendicular to the X-axis direction and the Y-axis direction is taken as the Z-axis direction.

[0011] The X-axis direction, for example, follows the down-track direction in the magnetic head 110. The Y-axis direction follows the cross-track direction. The Z-axis direction follows the height direction.

[0012] The first cross direction Dx1 from the first opposing side shield 41r to the first side shield 41s intersects the first direction D1. The first cross direction Dx1 may, for example, follow the Y-axis direction. The direction of the first cross direction Dx1 may be the same as or opposite to the direction of the Y-axis direction.

[0013] The first magnetic member 11 is provided between the first shield 41a and the first opposing shield 41b, and between the first side shield 41s and the first opposing side shield 41r.

[0014] The direction from the second shield 42a to the second opposing shield 42b, or the direction from the second opposing shield 42b to the second shield 42a, is along the first direction D1.

[0015] The second cross direction Dx2 from the second opposing side shield 42r to the second side shield 42s intersects the first direction D1. The second cross direction Dx2 may, for example, follow the Y-axis direction. The direction of the first cross direction Dx1 may be the same as or opposite to the direction of the Y-axis direction.

[0016] The second magnetic member 12 is provided between the second shield 42a and the second opposing shield 42b, and between the second side shield 42s and the second opposing side shield 42r.

[0017] The multiple terminals include a first shield terminal 21a, a first opposing shield terminal 21b, a second shield terminal 22a, a second opposing shield terminal 22b, a first side shield terminal 21s, a second side shield terminal 22s, and a common side shield terminal 20T.

[0018] The first shield terminal 21a is electrically connected to the first shield 41a. The first opposing shield terminal 21b is electrically connected to the first opposing shield 41b. The second shield terminal 22a is electrically connected to the second shield 42a. The second opposing shield terminal 22b is electrically connected to the second opposing shield 42b. The first side shield terminal 21s is electrically connected to the first side shield 41s. The second side shield terminal 22s is electrically connected to the second side shield 42s. The common side shield terminal 20T is electrically connected to the first opposing side shield 41r and the second opposing side shield 42r.

[0019] The direction from the first element EL1 to the second element EL2 follows the first direction D1.

[0020] As shown in Figure 1, a control circuit 50C may be connected to the magnetic head 110. In this example, the control circuit 50C includes a first detection circuit 51v, a second detection circuit 52v, a first current circuit 51a, and a second current circuit 52a. The magnetic recording device 120 according to this embodiment includes a magnetic head 110 and a control circuit 50C.

[0021] The first detection circuit 51v is capable of detecting a first electrical signal between the first shield terminal 21a and the first opposing shield terminal 21b. The second detection circuit 52v is capable of detecting a second electrical signal between the second shield terminal 22a and the second opposing shield terminal 22b. The first current circuit 51a is capable of supplying a first current between the first side shield terminal 21s and the common side shield terminal 20T. The second current circuit 52a is capable of supplying a second current between the second side shield terminal 22s and the common side shield terminal 20T.

[0022] The first and second currents may include a DC component. The first and second currents may be DC currents.

[0023] In this embodiment, a first conductive member 11c may be provided. A portion of the first conductive member 11c is provided between the first shield 41a and the first magnetic member 11. Another portion of the first conductive member 11c is provided between the first opposing shield 41b and the first magnetic member 11. Another portion of the first conductive member 11c is provided between the first side shield 41s and the first magnetic member 11. Another portion of the first conductive member 11c is provided between the first opposing side shield 41r and the first magnetic member 11.

[0024] The first magnetic member 11 is electrically connected to the first shield 41a and the first opposing shield 41b via the first conductive member 11c. The first magnetic member 11 is electrically connected to the first side shield 41s and the first opposing side shield 41r via the first conductive member 11c.

[0025] In this embodiment, a first current flows through the first magnetic member 11 via the first side shield 41s and the first opposing side shield 41r. When the first current is flowing, the signal (e.g., a voltage signal) generated between the first shield 41a and the first opposing shield 41b changes according to the target magnetic field applied to the first element EL1. By detecting the change in the signal, the target magnetic field can be detected. The target magnetic field is, for example, the magnetization of a magnetic recording medium.

[0026] In this embodiment, a second conductive member 12c may be provided. A portion of the second conductive member 12c is provided between the second shield 42a and the second magnetic member 12. Another portion of the second conductive member 12c is provided between the second opposing shield 42b and the second magnetic member 12. Another portion of the second conductive member 12c is provided between the second side shield 42s and the second magnetic member 12. Another portion of the second conductive member 12c is provided between the second opposing side shield 42r and the second magnetic member 12.

[0027] The second magnetic member 12 is electrically connected to the second shield 42a and the second opposing shield 42b via the second conductive member 12c. The second magnetic member 12 is electrically connected to the second side shield 42s and the second opposing side shield 42r via the second conductive member 12c.

[0028] In this embodiment, a second current flows through the second magnetic member 12 via the second side shield 42s and the second opposing side shield 42r. When the second current is flowing, the signal (e.g., a voltage signal) generated between the second shield 42a and the second opposing shield 42b changes according to the target magnetic field applied to the second element EL2. By detecting the change in the signal, the target magnetic field can be detected. The target magnetic field is, for example, the magnetization of a magnetic recording medium.

[0029] In this embodiment, multiple elements are used to detect information recorded on a magnetic recording medium. This allows for the reproduction of high-density information with higher accuracy.

[0030] In the magnetic head 110, a common side shield terminal 20T is provided. The common side shield terminal 20T is connected to the side shields of each of the multiple elements. On the other hand, a reference example can be considered in which each of the multiple elements has its own independent terminal. In terms of reference, the number of terminals and the wiring connected to them is large. The complexity of the wiring makes it easy for the characteristics to deteriorate. It is difficult to improve the reproducible recording density. The size of the playback unit 70 tends to be large. It is difficult to reduce costs.

[0031] In contrast, the embodiment allows for a reduction in the number of terminals compared to the reference example. This simplifies the wiring and suppresses degradation of characteristics. High-density information can be reproduced with high accuracy. The size of the playback unit 70 can be easily reduced. Lower costs can be achieved. According to the embodiment, a magnetic head capable of improved performance can be provided.

[0032] In this embodiment, the first conductive member 11c and the second conductive member 12c may be provided as needed or omitted. As shown in Figure 1, in the first element EL1, a first insulating member 31i may be provided between the shield and the side shield. In the second element EL2, a second insulating member 32i may be provided between the shield and the side shield.

[0033] As described above, the voltage generated changes depending on the magnetic field being detected. This voltage change may be based on, for example, the anomalous Hall effect (AHE). For example, the first magnetic member 11 and the second magnetic member 12 may have the anomalous Hall effect.

[0034] For example, the first magnetic member 11 and the second magnetic member 12 may include at least one selected from the group consisting of CoMnGa, CoMnAl, and FePt. In such materials, a large anomalous Hall effect is easily obtained. For example, a large detection output is easily obtained. CoMnGa and CoMnAl are, for example, Heusler alloy materials.

[0035] In the magnetic head 110, when current flows from the first side shield 41s to the first opposing side shield 41r, current flows from the second side shield 42s to the second opposing side shield 42r. As will be described later, the direction of these currents may be reversed.

[0036] Figure 2 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 2, the magnetic head 110a according to this embodiment further includes a third element EL3. The configuration of the magnetic head 110a excluding this element may be the same as that of the magnetic head 110. The third element EL3 is also included in the playback unit 70.

[0037] The third element EL3 includes a third shield 43a, a third opposing shield 43b, a third side shield 43s, a third opposing side shield 43r, and a third magnetic member 13.

[0038] The direction from the third shield 43a to the third opposing shield 43b, or from the third opposing shield 43b to the third shield 43a, is along the first direction D1. The third intersecting direction Dx3 from the third opposing side shield 43r to the third side shield 43s intersects with the first direction D1. The third intersecting direction Dx3 may, for example, be along the Y-axis. The orientation of the third intersecting direction Dx3 may be the same as or opposite to the orientation of the Y-axis.

[0039] The third magnetic member 13 is provided between the third shield 43a and the third opposing shield 43b, and between the third side shield 43s and the third opposing side shield 43r. The material of the third magnetic member 13 may be substantially the same as the material of the first magnetic member 11, for example. The material of the third magnetic member 13 may be different from the material of the other magnetic members, for example.

[0040] The multiple terminals include a third shield terminal 23a, a third opposing shield terminal 23b, and a third side shield terminal 23s. The third shield terminal 23a is electrically connected to the third shield 43a. The third opposing shield terminal 23b is electrically connected to the third opposing shield 43b. The third side shield terminal 23s is electrically connected to the third side shield 43s. The common side shield terminal 20T is further electrically connected to the third opposing side shield 43r.

[0041] In the magnetic head 110a, the wiring is simplified, and degradation of characteristics is suppressed. High-density information can be reproduced with high accuracy. The size of the playback unit 70 can be easily reduced. Low costs can be achieved. According to this embodiment, a magnetic head capable of improved performance can be provided.

[0042] The direction from the first element EL1 to the third element EL3 is along the first direction D1. The third element EL3 may be provided, for example, between the first element EL1 and the second element EL2. The second element EL2 may be provided between the first element EL1 and the third element EL3.

[0043] As shown in Figure 2, the control circuit 50C includes a third detection circuit 53v and a third current circuit 53a. The third detection circuit 53v is capable of detecting a third electrical signal between the third shield terminal 23a and the third opposing shield terminal 23b. The third current circuit 53a is capable of supplying a third current between the third side shield terminal 23s and the common side shield terminal 20T. The third current may include a DC component.

[0044] In the third element EL3, a third conductive member 13c may be provided. A portion of the third conductive member 13c is provided between the third shield 43a and the third magnetic member 13. Another portion of the third conductive member 13c is provided between the third opposing shield 43b and the third magnetic member 13. Another portion of the third conductive member 13c is provided between the third side shield 43s and the third magnetic member 13. Another portion of the third conductive member 13c is provided between the third opposing side shield 43r and the third magnetic member 13. In the third element EL3, a third insulating member 33i may be provided between the shield and the side shield.

[0045] The third magnetic member 13 is electrically connected to the third shield 43a and the third opposing shield 43b via the third conductive member 13c. The third magnetic member 13 is electrically connected to the third side shield 43s and the third opposing side shield 43r via the third conductive member 13c.

[0046] In this embodiment, a third current flows through the third magnetic member 13 via the third side shield 43s and the third opposing side shield 43r. When the third current is flowing, the signal (e.g., a voltage signal) generated between the third shield 43a and the third opposing shield 43b changes according to the target magnetic field applied to the third element EL3. By detecting the change in the signal, the target magnetic field can be detected.

[0047] Figure 3 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 3, the magnetic head 111 according to this embodiment includes a first element EL1, a second element EL2, and a plurality of terminals. In the magnetic head 111, the configurations of the first element EL1 and the second element EL2 may be the same as those in the magnetic head 110.

[0048] The multiple terminals include a first shield terminal 21a, a first opposing shield terminal 21b, a second shield terminal 22a, a second opposing shield terminal 22b, a first side shield terminal 21s, and a second side shield terminal 22s. The first shield terminal 21a is electrically connected to the first shield 41a. The first opposing shield terminal 21b is electrically connected to the first opposing shield 41b. The second shield terminal 22a is electrically connected to the second shield 42a. The second opposing shield terminal 22b is electrically connected to the second opposing shield 42b. The first side shield terminal 21s is electrically connected to the first side shield 41s. The second side shield terminal 22s is electrically connected to the second side shield 42s.

[0049] The first opposing side shield 41r is electrically connected to the second opposing side shield 42r. In this example, a first wiring 21L is provided. The first wiring 21L electrically connects the first opposing side shield 41r to the second opposing side shield 42r.

[0050] The control circuit 50C includes a first detection circuit 51v, a second detection circuit 52v, and a first current circuit 51a. The first detection circuit 51v is capable of detecting a first electrical signal between the first shield terminal 21a and the first opposing shield terminal 21b. The second detection circuit 52v is capable of detecting a second electrical signal between the second shield terminal 22a and the second opposing shield terminal 22b. The first current circuit 51a is capable of supplying a first current between the first side shield terminal 21s and the second side shield terminal 22s.

[0051] In this example, the first element EL1 and the second element EL2 are connected in series. The current that passes through the first element EL1 also passes through the second element EL2.

[0052] In the magnetic head 111, the wiring is simplified, and degradation of characteristics is suppressed. High-density information can be reproduced with high accuracy. A magnetic head with improved performance can be provided.

[0053] In the magnetic head 111, when current flows from the first side shield 41s to the first opposing side shield 41r, current flows from the second opposing side shield 42r to the second side shield 42s.

[0054] Figure 4 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 4, the magnetic head 111a according to the embodiment includes a first element EL1, a second element EL2, and a plurality of terminals. In the magnetic head 111a, the configuration of the side shield differs from that of the magnetic head 111. The other configurations of the magnetic head 111a may be the same as those of the magnetic head 111.

[0055] In the magnetic head 111a, when current flows from the first side shield 41s to the first opposing side shield 41r, current flows from the second opposing side shield 42r to the second side shield 42s.

[0056] Figure 5 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 5, the magnetic head 111b according to this embodiment further includes a third element EL3. The configuration of the third element EL3 in the magnetic head 111b may be the same as the configuration of the third element EL3 in the magnetic head 110a.

[0057] In the magnetic head 111b, the multiple terminals include a third shield terminal 23a electrically connected to the third shield 43a, a third opposing shield terminal 23b electrically connected to the third opposing shield 43b, and a third side shield terminal 23s electrically connected to the third side shield 43s.

[0058] In the magnetic head 111b, the first opposing side shield 41r is electrically connected to the third opposing side shield 43r. The third side shield 43s is electrically connected to the second opposing side shield 42r.

[0059] In this example, a first wiring 21L and a second wiring 22L are provided. The first wiring 21L electrically connects the first opposing side shield 41r to the third opposing side shield 43r. The second wiring 22L electrically connects the third side shield 43s to the second opposing side shield 42r. The first opposing side shield 41r, the first wiring 21L, and the second wiring 22L are electrically connected to the second opposing side shield 42r. The third element EL3 can be considered a conductor. The first wiring 21L is electrically connected to the second opposing side shield 42r via the third element EL3 and the second wiring 22L.

[0060] In the magnetic head 111b, the wiring is simplified, and degradation of characteristics is suppressed. High-density information can be reproduced with high accuracy. A magnetic head with improved performance can be provided.

[0061] Figure 6 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 6, in the magnetic head 111c according to this embodiment, the position of the side shield in the third element EL3 is different from the position of the side shield in the magnetic head 111b. The configuration of the magnetic head 111c, apart from this, may be the same as that of the magnetic head 111b.

[0062] In magnetic heads 111b and 111c, when current flows from the first side shield 41s to the first opposing side shield 41r, current flows from the third opposing side shield 43r to the third side shield 43s, and current flows from the second opposing side shield 42r to the second side shield 42s.

[0063] When the direction of the current flowing through multiple elements is the same, the sign of the output signal for the detected magnetic field will be the same, making signal processing after detection easier. On the other hand, when the direction of the current in one of the multiple elements is different from the direction of the current in another of the multiple elements, the wiring can be shortened, and the characteristics can be easily improved. In this case, for example, signal processing may be performed to change the sign of the output signal for the detected magnetic field after signal detection.

[0064] In magnetic heads 111, 111a to 111c, multiple elements are electrically connected in series. The same current flows through multiple elements. This suppresses the effect of current differences in the signals generated by multiple elements, enabling high-precision playback.

[0065] Figure 7 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 7, in the embodiment of the magnetic head 112, the connection of the multiple elements is different from that of the magnetic head 111. The configuration of the magnetic head 112, apart from this, may be the same as that of the magnetic head 111.

[0066] In the magnetic head 112, the multiple terminals include a first shield terminal 21a electrically connected to the first shield 41a, a first opposing shield terminal 21b electrically connected to the first opposing shield 41b, a second shield terminal 22a electrically connected to the second shield, a second opposing shield terminal 22b electrically connected to the second opposing shield 42b, a first side shield terminal 21s, and a second side shield terminal 22s.

[0067] In the magnetic head 112, the first side shield terminal 21s is electrically connected to the first side shield 41s and the second side shield 42s. The second side shield terminal 22s is electrically connected to the first opposing side shield 41r and the second opposing side shield 42r.

[0068] The first element EL1 is connected in parallel with the second element EL2. For example, even if an abnormality occurs in one of the multiple elements, normal detection (regeneration) is possible in another of the multiple elements.

[0069] Figure 8 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 8, in the magnetic head 112a according to this embodiment, the positions of the side shields in the multiple elements are different from those in the magnetic head 112. The configuration of the magnetic head 112a, apart from this, may be the same as that of the magnetic head 112.

[0070] In magnetic heads 112 and 112a, when current flows from the first side shield 41s to the first opposing side shield 41r, current flows from the second side shield 42s to the second opposing side shield 42r.

[0071] Figure 9 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 9, the magnetic head 112b according to this embodiment is provided with a third element EL3 and a plurality of terminals. The configuration of the magnetic head 112b, excluding these, may be the same as that of the magnetic head 112.

[0072] In the magnetic head 112b, the first side shield terminal 21s is further connected to the third side shield 43s. The second side shield terminal 22s is further connected to the third opposing side shield 43r.

[0073] Figure 10 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 10, in the embodiment of the magnetic head 112c, the position of the side shield is different from that of the magnetic head 112b. The configuration of the magnetic head 112c, aside from this, may be the same as that of the magnetic head 112b.

[0074] In magnetic heads 112b and 112c, the first element EL1, the second element EL2, and the third element EL3 are electrically connected in parallel.

[0075] In the magnetic heads 112b and 112c, when current flows from the first side shield 41s to the first opposing side shield 41r, current flows from the third side shield 43s to the third opposing side shield 43r, and current flows from the second side shield 42s to the second opposing side shield 42r.

[0076] Figure 11 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 11, in the embodiment of the magnetic head 113, the configuration of the multiple terminals is different from that of the magnetic head 111. The configuration of the magnetic head 113, apart from this, may be the same as that of the magnetic head 111.

[0077] The magnetic head 113 is also provided with a first element EL1, a second element EL2, and a plurality of terminals. The plurality of terminals include a first side shield terminal 21s, a first opposing side shield terminal 21r, a second side shield terminal 22s, and a second opposing side shield terminal 22r.

[0078] The first side shield terminal 21s is electrically connected to the first side shield 41s. The first opposing side shield terminal 21r is electrically connected to the first opposing side shield 41r. The second side shield terminal 22s is electrically connected to the second side shield 42s. The second opposing side shield terminal 22r is electrically connected to the second opposing side shield 42r. The first shield terminal 21a is electrically connected to the first shield 41a. The second shield terminal 22a is electrically connected to either the second opposing shield 42b or the second shield 42a. The other end of the second opposing shield 42b or the second shield 42a is electrically connected to the first opposing shield 41b.

[0079] In this example, the second shield terminal 22a is electrically connected to the second opposing shield 42b. The second shield 42a is electrically connected to the first opposing shield 41b by the first wiring 21L. The first wiring 21L may be omitted. In this case, the second shield 42a is directly electrically connected to the first opposing shield 41b.

[0080] In this example, current flows along the first direction D1. Meanwhile, a signal is detected between the side shield and the opposing side shield.

[0081] In the magnetic head 113, the wiring is simplified, and degradation of characteristics is suppressed. High-density information can be reproduced with high accuracy. A magnetic head with improved performance can be provided.

[0082] As shown in Figure 11, the control circuit 50C includes a first detection circuit 51v, a second detection circuit 52v, and a first current circuit 51a. The first detection circuit 51v is capable of detecting a first electrical signal between the first side shield terminal 21s and the first opposing side shield terminal 21r. The second detection circuit 52v is capable of detecting a second electrical signal between the second side shield terminal 22s and the second opposing side shield terminal 22r. The first current circuit 51a is capable of supplying a first current between the first shield terminal 21a and the second shield terminal 22a.

[0083] In the magnetic head 113, when current flows from the first shield 41a to the first opposing shield 41b, current flows from the second shield 42a to the second opposing shield 42b.

[0084] Figure 12 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 12, in the embodiment of the magnetic head 113a, the configuration of the multiple terminals is different from that of the magnetic head 113. The configuration of the magnetic head 113a, excluding this, may be the same as that of the magnetic head 113.

[0085] In the magnetic head 113a, the second shield terminal 22a is electrically connected to either the second opposing shield 42b or the second shield 42a. The other end of the second opposing shield 42b or the second shield 42a is electrically connected to the first opposing shield 41b. In the magnetic head 113a, the second shield terminal 22a is electrically connected to the second shield 42a. The second shield 42a is electrically connected to the first opposing shield 41b by the second wiring 22L.

[0086] In the magnetic head 113a, when current flows from the first shield 41a to the first opposing shield 41b, current flows from the second opposing shield 42b to the second shield 42a.

[0087] In magnetic heads 113 and 113a, multiple elements are electrically connected in series. The current flowing through one of the elements flows through another of the elements. The same current flows through multiple elements. This suppresses the effect of current differences in the signals generated by the multiple elements. This enables playback with high accuracy.

[0088] Figure 13 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 13, in the magnetic head 114 according to this embodiment, multiple elements are connected in parallel. The configuration of the magnetic head 114, apart from this, may be the same as that of the magnetic head 113.

[0089] In the magnetic head 114, the first side shield terminal 21s is electrically connected to the first side shield 41s. The first opposing side shield terminal 21r is electrically connected to the first opposing side shield 41r. The second side shield terminal 22s is electrically connected to the second side shield 42s. The second opposing side shield terminal 22r is electrically connected to the second opposing side shield 42r. The first shield terminal 21a is electrically connected to the first shield 41a. The second shield terminal 22a is electrically connected to the first opposing shield 41b.

[0090] The first shield terminal 21a is further electrically connected to one of the second shield 42a and the second opposing shield 42b. The second shield terminal 22a is further electrically connected to the other of the second shield 42a and the second opposing shield 42b. In this example, the first shield terminal 21a is electrically connected to the second shield 42a. The second shield terminal 22a is electrically connected to the second opposing shield 42b.

[0091] In the magnetic head 114, the wiring is simplified, and degradation of characteristics is suppressed. High-density information can be reproduced with high accuracy. A magnetic head capable of improved performance can be provided.

[0092] Figure 14 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 14, in the embodiment of the magnetic head 114a, the terminal connections are different from those in the magnetic head 114. The configuration of the magnetic head 114a, apart from this, may be the same as that of the magnetic head 114.

[0093] In the magnetic head 114a, the first shield terminal 21a is electrically connected to the second opposing shield 42b. The second shield terminal 22a is electrically connected to the second shield 42a.

[0094] In magnetic heads 114 and 114a, multiple elements are connected in parallel. For example, even if an abnormality occurs in one of the multiple elements, normal detection (reproduction) is still possible in another of the multiple elements.

[0095] In the magnetic head 114 and magnetic head 114a, the control circuit 50C includes a first detection circuit 51v, a second detection circuit 52v, and a first current circuit 51a. The first detection circuit 51v is capable of detecting a first electrical signal between the first side shield terminal 21s and the first opposing side shield terminal 21r. The second detection circuit 52v is capable of detecting a second electrical signal between the second side shield terminal 22s and the second opposing side shield terminal 22r. The first current circuit 51a is capable of supplying a first current between the first shield terminal 21a and the second shield terminal 22a.

[0096] Figure 15 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 15, in the magnetic head 115, the first element EL1 and the second element EL2 are integrated via an insulating film 35i.

[0097] Figure 16 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 16, in the magnetic head 115a, the position of the first magnetic member 11 in the Y-axis direction may differ from the position of the second magnetic member 12 in the Y-axis direction. For example, it is easier to accommodate differences in skew. Higher-precision detection (reproduction) is easier.

[0098] Figure 17 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 17, in the magnetic head 115b, the first element EL1 further includes a first magnetic layer 31a. The first element EL1 may also include a first opposing magnetic layer 31b. The first magnetic layer 31a and the first opposing magnetic layer 31b each include at least one selected from the group consisting of IrMn, PtMn, FeMn, and NiMn. The first magnetic layer 31a is provided between the first side shield 41s and the first opposing shield 41b. The first opposing magnetic layer 31b is provided between the first opposing side shield 41r and the first opposing shield 41b.

[0099] For example, the first magnetic layer 31a and the first opposing magnetic layer 31b are antiferromagnetic layers. These magnetic layers stabilize the magnetization of the shield.

[0100] The second element EL2 may include a second magnetic layer 32a and a second opposing magnetic layer 32b. The second magnetic layer 32a and the second opposing magnetic layer 32b each include at least one selected from the group consisting of IrMn, PtMn, FeMn, and NiMn. The second magnetic layer 32a is provided between the second side shield 42s and the second opposing shield 42b. The second opposing magnetic layer 32b is provided between the second opposing side shield 42r and the second opposing shield 42b.

[0101] Figure 18 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 18, in the magnetic head 115c, the first element EL1 further includes a first magnetic layer 31a. The first magnetic layer 31a is provided between the first opposing shield 41b and the second shield 42a. The second element EL2 may further include a second magnetic layer 32a. The second opposing shield 42b is provided between the second magnetic member 12 and the second magnetic layer 32a. In the example of the magnetic head 115c, these magnetic layers stabilize the magnetic field of the shield.

[0102] Figure 19 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment. As shown in Figure 19, in the magnetic head 115d, the length of the first magnetic member 11 in the first intersecting direction Dx1 may be less than or equal to the length of the first magnetic member 11 in the first direction D1. The length of the second magnetic member 12 in the second intersecting direction Dx2 may be less than or equal to the length of the second magnetic member 12 in the first direction D1.

[0103] The configurations of the magnetic heads 115, 115a to 115d may be applied to the various magnetic heads and magnetic recording devices described above.

[0104] (Second Embodiment) The second embodiment relates to a magnetic recording device. The magnetic recording apparatus according to the embodiment includes a magnetic recording medium head according to the first embodiment and a control circuit 50C. As shown in Figures 1 to 14, the magnetic recording apparatuses 120, 120a, 121 to 124, 121a to 121c, 122a to 122c, 123a, and 124a each include magnetic heads 110, 110a, 111 to 114, 111a to 111c, 112a to 112c, 113a, and 114a, respectively.

[0105] As described above, the control circuit 50C includes, for example, a first detection circuit 51V, a second detection circuit 52V, and a first current circuit 51A. The control circuit 50C may further include a second current circuit 52A.

[0106] For example, in the magnetic recording device 120, the first current circuit 51a can supply a first current between the first side shield terminal 21s and the common side shield terminal 20T. The second current circuit 52a can supply a second current between the second side shield terminal 22s and the common side shield terminal 20T.

[0107] For example, in the example of the magnetic recording device 121, the control circuit 50C, specifically the first current circuit 51a, can supply a first current between the first side shield terminal 21s and the second side shield terminal 22s. In one example, the first current flows from the first side shield 41s to the first opposing side shield 41r and from the second side shield 42s to the second opposing side shield 42r. In another example, the first current may flow from the first side shield 41s to the first opposing side shield 41r and from the second opposing side shield 42r to the second side shield 42s.

[0108] For example, in the example of the magnetic recording device 122, the first current circuit 51a can supply a first current between the first side shield terminal 21s and the second side shield terminal 22s. In one example, the first current flows from the first side shield 41s to the first opposing side shield 41r and from the second side shield 42s to the second opposing side shield 42r. In another example, the first current may flow from the first side shield 41s to the first opposing side shield 41r and from the second opposing side shield 42r to the second side shield 42s.

[0109] For example, in the magnetic recording device 123, the control circuit 50C includes a first detection circuit 51v, a second detection circuit 52v, and a first current circuit 51a. The first detection circuit 51v is capable of detecting a first electrical signal between a first side shield terminal 21s and a first opposing side shield terminal 21r. The second detection circuit 52v is capable of detecting a second electrical signal between a second side shield terminal 22s and a second opposing side shield terminal 22r. The first current circuit 51a is capable of supplying a first current between a first shield terminal 21a and a second shield terminal 22a.

[0110] For example, in the example of the magnetic recording device 124, the control circuit 50C includes a first detection circuit 51v, a second detection circuit 52v, and a first current circuit 51a. The first detection circuit 51v is capable of detecting a first electrical signal between a first side shield terminal 21s and a first opposing side shield terminal 21r. The second detection circuit 52v is capable of detecting a second electrical signal between a second side shield terminal 22s and a second opposing side shield terminal 22r. The first current circuit 51a is capable of supplying a first current between a first shield terminal 21a and a second shield terminal 22a. In one example, the first current flows from the first shield 41a to the first opposing shield 41b and from the second opposing shield 42b to the second shield 42a. In another example, the direction of the current may be reversed in multiple elements.

[0111] (Third embodiment) Figure 20 is a schematic perspective view illustrating a magnetic head and magnetic recording device according to the third embodiment. As shown in Figure 20, the magnetic head 110 according to this embodiment includes a playback unit 70. The playback unit 70 includes a magnetic sensor according to the first embodiment. The magnetic head 110 is used together with a magnetic recording medium 80. In this example, the magnetic head 110 includes a recording unit 90. The recording unit 90 of the magnetic head 110 records information on the magnetic recording medium 80. The playback unit 70 reproduces the information recorded on the magnetic recording medium 80.

[0112] The magnetic recording medium 80 includes, for example, a media substrate 82 and a magnetic recording layer 81 provided on the media substrate 82. The magnetization 83 of the magnetic recording layer 81 is controlled by the recording unit 90. The recording unit 90 includes, for example, a first magnetic pole 91 and a second magnetic pole 92. The first magnetic pole 91 is, for example, a main magnetic pole. The second magnetic pole 92 is, for example, a trailing shield. The recording unit 90 may also include a recording unit element 93. The recording unit element 93 may include a magnetic field control element or a high-frequency oscillation element, etc. The recording unit element 93 may be omitted.

[0113] The regeneration unit 70 includes, for example, a first regeneration magnetic shield 72a, a second regeneration magnetic shield 72b, and a magnetic regeneration element 71. The magnetic regeneration element 71 is provided between the first regeneration magnetic shield 72a and the second regeneration magnetic shield 72b. The magnetic regeneration element 71 is capable of outputting a signal corresponding to the magnetization 83 of the magnetic recording layer 81.

[0114] The first regenerating magnetic shield 72a corresponds to, for example, the first shield 41a (see Figure 1). The second regenerating magnetic shield 72b corresponds to, for example, the second opposing shield 42b (see Figure 1). The magnetic regeneration element 71 includes the first magnetic member 11 and the second magnetic member 12, etc.

[0115] As shown in Figure 20, the magnetic recording medium 80 moves relative to the magnetic head 110 in the direction of the medium movement direction 85. The magnetic head 110 controls the information corresponding to the magnetization 83 of the magnetic recording layer 81 at any position. The magnetic head 110 reproduces the information corresponding to the magnetization 83 of the magnetic recording layer 81 at any position.

[0116] Figure 21 is a schematic perspective view illustrating a part of a magnetic recording apparatus according to an embodiment. Figure 21 illustrates a head slider. The magnetic head 110 is mounted on a head slider 159. The head slider 159 includes, for example, Al2O3 / TiC. The head slider 159 moves relative to the magnetic recording medium, either floating above or in contact with it.

[0117] The head slider 159 has, for example, an air inlet side 159A and an air outlet side 159B. The magnetic head 110 is positioned on the side of the air outlet side 159B of the head slider 159. As a result, the magnetic head 110 moves relative to the magnetic recording medium while floating above or in contact with it.

[0118] Figure 22 is a schematic perspective view illustrating a magnetic recording device according to an embodiment. Figures 23(a) and 23(b) are schematic perspective views illustrating a part of a magnetic recording apparatus according to an embodiment. The magnetic recording device may be a magnetic recording and playback device. As shown in Figure 22, a rotary actuator is used in the magnetic recording device 150 according to this embodiment. The recording medium disk 180 is mounted on a spindle motor 180M. The recording medium disk 180 rotates in the direction of arrow AR by the spindle motor 180M. The spindle motor 180M responds to a control signal from the drive unit control. The magnetic recording device 150 according to this embodiment may include a plurality of recording medium disks 180. The magnetic recording device 150 may also include a recording medium 181. The recording medium 181 is, for example, an SSD (Solid State Drive). For example, a non-volatile memory such as flash memory is used for the recording medium 181. For example, the magnetic recording device 150 may also be a hybrid HDD (Hard Disk Drive).

[0119] The head slider 159 records and plays back information to be recorded on the recording medium disk 180. The head slider 159 is located at the tip of a thin-film suspension 154. A magnetic head according to this embodiment is located near the tip of the head slider 159.

[0120] As the recording medium disk 180 rotates, the pressing pressure from the suspension 154 and the pressure generated on the media-facing surface (ABS) of the head slider 159 are balanced. The distance between the media-facing surface of the head slider 159 and the surface of the recording medium disk 180 becomes a predetermined amount of levitation. In this embodiment, the head slider 159 may be in contact with the recording medium disk 180. For example, a contact-running type may be applied.

[0121] The suspension 154 is connected to one end of an arm 155 (for example, an actuator arm). The arm 155 has, for example, a bobbin section. The bobbin section holds a drive coil. A voice coil motor 156 is provided at the other end of the arm 155. The voice coil motor 156 is a type of linear motor. The voice coil motor 156 includes, for example, a drive coil and a magnetic circuit. The drive coil is wound around the bobbin section of the arm 155. The magnetic circuit includes a permanent magnet and an opposing yoke. The drive coil is provided between the permanent magnet and the opposing yoke. The suspension 154 has one end and the other end. A magnetic head is provided at one end of the suspension 154. The arm 155 is connected to the other end of the suspension 154.

[0122] The arm 155 is held by ball bearings. Ball bearings are provided at two locations, above and below the bearing portion 157. The arm 155 can rotate and slide by a voice coil motor 156. The magnetic head can move to any position on the recording medium disk 180.

[0123] Figure 23(a) illustrates a part of the configuration of a magnetic recording device and is an enlarged perspective view of the head stack assembly 160. Figure 23(b) is a perspective view illustrating a magnetic head assembly (head gimbal assembly: HGA) 158, which is part of the head stack assembly 160.

[0124] As shown in Figure 23(a), the head stack assembly 160 includes a bearing section 157, a head gimbal assembly 158, and a support frame 161. The head gimbal assembly 158 extends from the bearing section 157. The support frame 161 extends from the bearing section 157. The direction in which the support frame 161 extends is opposite to the direction in which the head gimbal assembly 158 extends. The support frame 161 supports the coil 162 of the voice coil motor 156.

[0125] As shown in Figure 23(b), the head gimbal assembly 158 includes an arm 155 extending from a bearing portion 157 and a suspension 154 extending from the arm 155.

[0126] A head slider 159 is provided at the tip of the suspension 154. A magnetic head according to the embodiment is provided on the head slider 159.

[0127] The magnetic head assembly (head gimbal assembly) 158 according to the embodiment includes a magnetic head according to the embodiment, a head slider 159 on which the magnetic head is provided, a suspension 154, and an arm 155. The head slider 159 is provided at one end of the suspension 154. The arm 155 is connected to the other end of the suspension 154.

[0128] The suspension 154 may have, for example, lead wires (not shown) for recording and reproducing signals. The suspension 154 may also have, for example, lead wires (not shown) for heaters for adjusting the amount of levitation. The suspension 154 may also have, for example, lead wires (not shown) for an oscillator or the like. These lead wires are electrically connected to a plurality of electrodes provided on the magnetic head.

[0129] In the magnetic recording device 150, a signal processing unit 190 is provided. The signal processing unit 190 records and reproduces signals on a magnetic recording medium using a magnetic head. The input and output lines of the signal processing unit 190 are connected, for example, to the electrode pads of the head gimbal assembly 158 and are electrically connected to the magnetic head.

[0130] The magnetic recording apparatus 150 according to the embodiment includes a magnetic recording medium, a magnetic head according to the embodiment, a movable part, a position control unit, and a signal processing unit. The movable part allows the magnetic recording medium and the magnetic head to move relative to each other while separated or in contact. The position control unit aligns the magnetic head to a predetermined recording position on the magnetic recording medium. The signal processing unit records and reproduces signals on the magnetic recording medium using the magnetic head.

[0131] For example, a recording medium disk 180 is used as the magnetic recording medium. The movable part includes, for example, a head slider 159. The position control unit includes, for example, a head gimbal assembly 158.

[0132] The embodiment may include the following configuration (e.g., proposed technical details). (Composition 1) The first element is, The first shield and, A first opposing shield, wherein the direction from the first shield to the first opposing shield is along the first direction, and the first opposing shield and First side shield and, A first opposing side shield, wherein the first intersecting direction from the first opposing side shield to the first side shield intersects with the first direction, and the first side shield A first magnetic member provided between the first shield and the first opposing shield, and between the first side shield and the first opposing side shield, The first element includes, A second element, wherein the second element is The second shield, A second opposing shield, wherein the direction from the earlier second shield to the earlier second opposing shield, or from the earlier second opposing shield to the earlier second shield, is aligned with the earlier first direction, The second side shield, A second opposing side shield, wherein the second intersecting direction from the second opposing side shield to the second side shield intersects with the first direction, and the second side shield is A second magnetic member provided between the second shield and the second opposing shield, and between the second side shield and the second opposing side shield, The second element includes, The first shield terminal is electrically connected to the first shield, The first opposing shield terminal is electrically connected to the first opposing shield, The second shield terminal is electrically connected to the second shield, A second opposing shield terminal electrically connected to the second opposing shield, The first side shield terminal is electrically connected to the first side shield, The second side shield terminal is electrically connected to the second side shield, A common side shield terminal electrically connected to the first opposing side shield and the second opposing side shield, A magnetic head equipped with a magnetic head.

[0133] (Configuration 2) A third element, wherein the third element is The third shield and, A third opposing shield, wherein the direction from the previous third shield to the previous third opposing shield, or from the previous third opposing shield to the previous third shield, is aligned with the previous first direction, The third side shield, A third opposing side shield, wherein the third intersecting direction from the third opposing side shield to the third side shield intersects with the first direction, and the third opposing side shield A third magnetic member provided between the third shield and the third opposing shield, and between the third side shield and the third opposing side shield, The third element includes, The third shield terminal is electrically connected to the third shield, The third opposing shield terminal is electrically connected to the third opposing shield, A third side shield terminal electrically connected to the third side shield, Furthermore, The magnetic head according to configuration 1, wherein the common side shield terminal is further electrically connected to the third opposing side shield.

[0134] (Composition 3) The first element is, The first shield and, A first opposing shield, wherein the direction from the first shield to the first opposing shield is along the first direction, and the first opposing shield and First side shield and, A first opposing side shield, wherein the first intersecting direction from the first opposing side shield to the first side shield intersects with the first direction, and the first side shield A first magnetic member provided between the first shield and the first opposing shield, and between the first side shield and the first opposing side shield, The first element includes, A second element, wherein the second element is The second shield, A second opposing shield, wherein the direction from the earlier second shield to the earlier second opposing shield, or from the earlier second opposing shield to the earlier second shield, is aligned with the earlier first direction, The second side shield, A second opposing side shield, wherein the second intersecting direction from the second opposing side shield to the second side shield intersects with the first direction, and the second side shield is A second magnetic member provided between the second shield and the second opposing shield, and between the second side shield and the second opposing side shield, The second element includes, The first shield terminal is electrically connected to the first shield, The first opposing shield terminal is electrically connected to the first opposing shield, The second shield terminal is electrically connected to the second shield, A second opposing shield terminal electrically connected to the second opposing shield, The first side shield terminal is electrically connected to the first side shield, The second side shield terminal is electrically connected to the second side shield, Equipped with, The first opposing side shield is electrically connected to the second opposing side shield and is a magnetic head.

[0135] (Composition 4) A third element, wherein the third element is The third shield and, A third opposing shield, wherein the direction from the previous third shield to the previous third opposing shield, or from the previous third opposing shield to the previous third shield, is aligned with the previous first direction, The third side shield, A third opposing side shield, wherein the third intersecting direction from the third opposing side shield to the third side shield intersects with the first direction, and the third opposing side shield A third magnetic member provided between the third shield and the third opposing shield, and between the third side shield and the third opposing side shield, The third element includes, The third shield terminal is electrically connected to the third shield, The third opposing shield terminal is electrically connected to the third opposing shield, A third side shield terminal electrically connected to the third side shield, Furthermore, The first opposing side shield is electrically connected to the third opposing side shield. The magnetic head according to configuration 3, wherein the third side shield is electrically connected to the second opposing side shield.

[0136] (Composition 5) The first element is, The first shield and, A first opposing shield, wherein the direction from the first shield to the first opposing shield is along the first direction, and the first opposing shield and First side shield and, A first opposing side shield, wherein the first intersecting direction from the first opposing side shield to the first side shield intersects with the first direction, and the first side shield A first magnetic member provided between the first shield and the first opposing shield, and between the first side shield and the first opposing side shield, The first element includes, A second element, wherein the second element is The second shield, A second opposing shield, wherein the direction from the earlier second shield to the earlier second opposing shield, or from the earlier second opposing shield to the earlier second shield, is aligned with the earlier first direction, The second side shield, A second opposing side shield, wherein the second intersecting direction from the second opposing side shield to the second side shield intersects with the first direction, and the second side shield is A second magnetic member provided between the second shield and the second opposing shield, and between the second side shield and the second opposing side shield, The second element includes, The first shield terminal is electrically connected to the first shield, The first opposing shield terminal is electrically connected to the first opposing shield, The second shield terminal is electrically connected to the second shield, A second opposing shield terminal electrically connected to the second opposing shield, The first side shield terminal is electrically connected to the first side shield and the second side shield, A second side shield terminal electrically connected to the first opposing side shield and the second opposing side shield, A magnetic head equipped with a magnetic head.

[0137] (Composition 6) A third element, wherein the third element is The third shield and, A third opposing shield, wherein the direction from the previous third shield to the previous third opposing shield, or from the previous third opposing shield to the previous third shield, is aligned with the previous first direction, The third side shield, A third opposing side shield, wherein the third intersecting direction from the third opposing side shield to the third side shield intersects with the first direction, and the third opposing side shield A third magnetic member provided between the third shield and the third opposing shield, and between the third side shield and the third opposing side shield, The third element includes, The third shield terminal is electrically connected to the third shield, The third opposing shield terminal is electrically connected to the third opposing shield, A third side shield terminal electrically connected to the third side shield, Furthermore, The first side shield terminal is further connected to the third side shield, The magnetic head according to configuration 5, wherein the second side shield terminal is further connected to the third opposing side shield.

[0138] (Composition 7) The first element is, The first shield and, A first opposing shield, wherein the direction from the first shield to the first opposing shield is along the first direction, and the first opposing shield and First side shield and, A first opposing side shield, wherein the first intersecting direction from the first opposing side shield to the first side shield intersects with the first direction, and the first side shield A first magnetic member provided between the first shield and the first opposing shield, and between the first side shield and the first opposing side shield, The first element includes, A second element, wherein the second element is The second shield, A second opposing shield, wherein the direction from the earlier second shield to the earlier second opposing shield, or from the earlier second opposing shield to the earlier second shield, is aligned with the earlier first direction, The second side shield, A second opposing side shield, wherein the second intersecting direction from the second opposing side shield to the second side shield intersects with the first direction, and the second side shield is A second magnetic member provided between the second shield and the second opposing shield, and between the second side shield and the second opposing side shield, The second element includes, The first side shield terminal is electrically connected to the first side shield, The first opposing side shield terminal is electrically connected to the first opposing side shield, The second side shield terminal is electrically connected to the second side shield, The second opposing side shield terminal is electrically connected to the second opposing side shield, The first shield terminal is electrically connected to the first shield, The second opposing shield and the second shield terminal electrically connected to one of the second shields, Equipped with, The second opposing shield and the other of the second shield are magnetic heads electrically connected to the first opposing shield.

[0139] (Composition 8) The first element is, The first shield and, A first opposing shield, wherein the direction from the first shield to the first opposing shield is along the first direction, and the first opposing shield and First side shield and, A first opposing side shield, wherein the first intersecting direction from the first opposing side shield to the first side shield intersects with the first direction, and the first side shield A first magnetic member provided between the first shield and the first opposing shield, and between the first side shield and the first opposing side shield, The first element includes, A second element, wherein the second element is The second shield, A second opposing shield, wherein the direction from the earlier second shield to the earlier second opposing shield, or from the earlier second opposing shield to the earlier second shield, is aligned with the earlier first direction, The second side shield, A second opposing side shield, wherein the second intersecting direction from the second opposing side shield to the second side shield intersects with the first direction, and the second side shield is A second magnetic member provided between the second shield and the second opposing shield, and between the second side shield and the second opposing side shield, The second element includes, The first side shield terminal is electrically connected to the first side shield, The first opposing side shield terminal is electrically connected to the first opposing side shield, The second side shield terminal is electrically connected to the second side shield, The second opposing side shield terminal is electrically connected to the second opposing side shield, The first shield terminal is electrically connected to the first shield, A second shield terminal electrically connected to the first opposing shield, Equipped with, The first shield terminal is further electrically connected to either the second shield or the second opposing shield. The second shield terminal is further electrically connected to the other side of the second shield and the second opposing shield, and is a magnetic head.

[0140] (Composition 9) The magnetic head according to any one of configurations 1 to 8, wherein the first magnetic member includes at least one selected from the group consisting of CoMnGa, CoMnAl, and FePt.

[0141] (Composition 10) The first element further includes a first magnetic layer, The first magnetic layer comprises at least one selected from the group consisting of IrMn, PtMn, FeMn, and NiMn. The first magnetic layer is provided between the first side shield and the first opposing shield, in the magnetic head according to any one of configurations 1 to 9.

[0142] (Composition 11) The first element further includes a first magnetic layer, The first magnetic layer comprises at least one selected from the group consisting of IrMn, PtMn, FeMn, and NiMn. The first magnetic layer is provided between the first opposing shield and the second shield, and is a magnetic head according to any one of configurations 1 to 9.

[0143] (Composition 12) The magnetic head described in Configuration 1, Control circuit and Equipped with, The aforementioned control circuit is A first detection circuit capable of detecting a first electrical signal between the first shield terminal and the first opposing shield terminal, A second detection circuit capable of detecting a second electrical signal between the second shield terminal and the second opposing shield terminal, A first current circuit capable of supplying a first current between the first side shield terminal and the common side shield terminal, A second current circuit capable of supplying a second current between the second side shield terminal and the common side shield terminal, A magnetic recording device, including a magnetic recording device.

[0144] (Composition 13) The magnetic head described in configuration 3, Control circuit and Equipped with, The aforementioned control circuit is A first detection circuit capable of detecting a first electrical signal between the first shield terminal and the first opposing shield terminal, A second detection circuit capable of detecting a second electrical signal between the second shield terminal and the second opposing shield terminal, A first current circuit capable of supplying a first current between the first side shield terminal and the second side shield terminal, A magnetic recording device equipped with a magnetic recording device.

[0145] (Composition 14) The first current flows in the direction from the first side shield to the first opposing side shield. The magnetic recording apparatus according to configuration 13, wherein the first current flows from the second side shield to the second opposing side shield.

[0146] (Composition 15) The magnetic head described in configuration 5, Control circuit and Equipped with, The aforementioned control circuit is A first detection circuit capable of detecting a first electrical signal between the first shield terminal and the first opposing shield terminal, A second detection circuit capable of detecting a second electrical signal between the second shield terminal and the second opposing shield terminal, A first current circuit capable of supplying a first current between the first side shield terminal and the second side shield terminal, A magnetic recording device equipped with a magnetic recording device.

[0147] (Composition 16) The first current flows in the direction from the first side shield to the first opposing side shield. The magnetic recording apparatus according to configuration 15, wherein the first current flows from the second side shield to the second opposing side shield.

[0148] (Composition 17) The magnetic head described in configuration 7, Control circuit and Equipped with, The aforementioned control circuit is A first detection circuit capable of detecting a first electrical signal between the first side shield terminal and the first opposing side shield terminal, A second detection circuit capable of detecting a second electrical signal between the second side shield terminal and the second opposing side shield terminal, A first current circuit capable of supplying a first current between the first shield terminal and the second shield terminal, A magnetic recording device equipped with a magnetic recording device.

[0149] (Composition 18) The first current flows from the first shield to the first opposing shield. The magnetic recording apparatus according to configuration 17, wherein the first current flows from the second shield to the second opposing shield.

[0150] (Composition 19) The magnetic head described in configuration 8, Control circuit and Equipped with, The aforementioned control circuit is A first detection circuit capable of detecting a first electrical signal between the first side shield terminal and the first opposing side shield terminal, A second detection circuit capable of detecting a second electrical signal between the second side shield terminal and the second opposing side shield terminal, A first current circuit capable of supplying a first current between the first shield terminal and the second shield terminal, A magnetic recording device equipped with a magnetic recording device.

[0151] (Composition 20) The first current flows from the first shield to the first opposing shield. The magnetic recording apparatus according to configuration 17, wherein the first current flows in the direction from the second opposing shield to the second shield.

[0152] According to the embodiment, a magnetic head and a magnetic recording device capable of improving performance can be provided.

[0153] In this specification, "perpendicular" and "parallel" do not mean strictly perpendicular and strictly parallel, but also include variations in the manufacturing process, for example, and it is sufficient if they are substantially perpendicular and substantially parallel.

[0154] The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. For example, the specific configuration of each element included in the magnetic head and magnetic recording device, such as shields, magnetic members, magnetic layers, conductive members, insulating members, and terminals, is included within the scope of the present invention as long as the present invention can be implemented in the same manner and similar effects can be obtained by appropriately selecting from the range known to those skilled in the art.

[0155] Combinations of two or more elements from any of the specific examples, to the extent technically feasible, are also included within the scope of the present invention, insofar as they encompass the gist of the invention.

[0156] Furthermore, all magnetic heads and magnetic recording devices that a person skilled in the art can design and implement based on the above-described embodiments of the present invention, insofar as they encompass the gist of the present invention, also fall within the scope of the present invention.

[0157] Furthermore, within the scope of the concept of the present invention, a person skilled in the art could conceive of various modifications and alterations, and it is understood that such modifications and alterations also fall within the scope of the present invention.

[0158] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0159] 11~13: 1st~3rd magnetic members, 11c~13c: 1st~3rd conductive members, 20T: common side shield terminal, 21L, 22L: 1st and 2nd wiring, 21a~23a: 1st~3rd shield terminals, 21b~23b: 1st~3rd opposing shield terminals, 21r, 22r: 1st and 2nd opposing side shield terminals, 21s~23s: 1st~3rd side shield terminals, 31a, 32a: 1st and 2nd magnetic layers, 31b, 32b: 1st and 2nd opposing magnetic layers, 31i~33i: 1st~3rd insulating members, 35i: insulating film, 41a~43a: 1st~3rd shields, 41b~43b: 1st~3rd opposing shields, 41r~43r: 1st~3rd opposing side shields, 41s~43s: 1st~3rd side shields, 50C: control circuit, 51a~53a: 1st~3rd current circuits, 51v~53v: 1st~3rd detection circuits, 70: regeneration section, 71: magnetic regeneration element, 72a, 72b: 1st and 2nd regeneration magnetic shields, 80: magnetic recording medium, 81: magnetic recording layer, 82: media substrate, 83: magnetization, 85: media movement direction, 90: recording section, 91: 1st magnetic pole, 92: 2nd magnetic pole, 93: recording section element, 110, 110a, 111, 111a~111c, 112, 112a~112c, 113, 113a, 114, 114a, 115, 115a~115d: magnetic head 120, 120a, 121, 121a, 122, 122a~122c, 123, 123a, 124, 124a, 150: Magnetic recording device, 154: Suspension, 155: Arm, 156: Voice coil motor, 157: Bearing section, 158: Head gimbal assembly, 159: Head slider, 159A: Air inlet side, 159B: Air outlet side, 160: Head stack assembly, 161: Support frame, 162: Coil, 180: Recording medium disk, 180M: Spindle motor, 181: Recording medium, 190: Signal processing unit, AR: Arrow, D1: First direction, Dx1~Dx3: First~Third intersecting directions, EL1~EL3: First~Third elements

Claims

[Claim 1] The first element is, The first shield and, A first opposing shield, wherein the direction from the first shield to the first opposing shield is along the first direction, and the first opposing shield is First side shield and, A first opposing side shield, wherein the first intersecting direction from the first opposing side shield to the first side shield intersects with the first direction, and the first side shield A first magnetic member provided between the first shield and the first opposing shield, and between the first side shield and the first opposing side shield, The first element includes, A second element, wherein the second element is The second shield, A second opposing shield, wherein the direction from the first second shield to the second opposing shield, or from the first second opposing shield to the second shield, is aligned with the first direction, The second side shield, A second opposing side shield, wherein the second intersecting direction from the second opposing side shield to the second side shield intersects with the first direction, and the second side shield is A second magnetic member provided between the second shield and the second opposing shield, and between the second side shield and the second opposing side shield, The second element includes, The first shield terminal is electrically connected to the first shield, A first opposing shield terminal electrically connected to the first opposing shield, The second shield terminal is electrically connected to the second shield, The second opposing shield terminal is electrically connected to the second opposing shield, A first side shield terminal electrically connected to the first side shield, The second side shield terminal is electrically connected to the second side shield, A common side shield terminal electrically connected to the first opposing side shield and the second opposing side shield, A magnetic head equipped with a magnetic head.

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