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CN-122024775-A - Read-write head device structure, magnetic head, magnetic storage device and electronic equipment

CN122024775ACN 122024775 ACN122024775 ACN 122024775ACN-122024775-A

Abstract

The embodiment of the application discloses a read-write head device structure, a magnetic head, a magnetic storage device and electronic equipment. The read-write head device structure comprises a coil and a magnetic circuit which are stacked on a substrate layer, wherein the coil and the magnetic circuit are embedded in an insulating dielectric layer, the magnetic circuit comprises a first magnetic conduction layer and a second magnetic conduction layer, the first magnetic conduction layer is arranged close to the substrate layer, the second magnetic conduction layer is positioned on one side of the first magnetic conduction layer, which is far away from the substrate layer, and the coil is spirally wound on the first magnetic conduction layer or the second magnetic conduction layer and is wound layer by layer along a first direction of extending of the first magnetic conduction layer or the second magnetic conduction layer. The three-dimensional space of the read-write head is fully utilized to form the coil structure, the coil is spirally wound between the first end and the second end of the first magnetic conduction layer or the second magnetic conduction layer, the size of the read-write head device in the extending direction of the read-write surface can be reduced, good magnetic storage performance can be obtained through the improvement of magnetic field writing density and read-write efficiency, and the use requirement of different data high-density storage scenes is met.

Inventors

  • Xie Faji
  • XUE SONGSHENG
  • YI YIDE
  • ZHANG YIYUAN
  • LI YANNI
  • WANG PENGFEI
  • HUANG GUOTING

Assignees

  • 华为技术有限公司
  • 江苏多维科技有限公司

Dates

Publication Date
20260512
Application Date
20241112

Claims (20)

  1. 1. A head device structure comprising a coil and a magnetic circuit stacked on a substrate layer, wherein the coil and the magnetic circuit are embedded in an insulating dielectric layer; the magnetic circuit comprises a first magnetic conduction layer and a second magnetic conduction layer, the first magnetic conduction layer is arranged close to the substrate layer, the second magnetic conduction layer is positioned on one side of the first magnetic conduction layer far away from the substrate layer, a magnetic head air gap is formed between the first end of the first magnetic conduction layer and the first end of the second magnetic conduction layer, an opening of the magnetic head air gap is positioned on a read-write surface of a read-write head device structure, and the second end of the first magnetic conduction layer is connected with the second end of the second magnetic conduction layer through a magnetic conduction connecting part; The coil is spirally wound on the first magnetic conduction layer or the second magnetic conduction layer, and is wound layer by layer along a first direction in which the first magnetic conduction layer or the second magnetic conduction layer extends.
  2. 2. The head device structure of claim 1, wherein the coil includes a first layer coil body, a connection coil body, and a second layer coil body formed in sequence in a stacking direction, the plurality of first layer coil bodies being positioned at one side of the coiled magnetically conductive layer, the plurality of second layer coil bodies being positioned at the other side of the coiled magnetically conductive layer, and each of the first layer coil bodies and each of the second layer coil bodies being disposed at a distance in sequence in the first direction, and the coil being coiled layer by connecting both ends of the first layer coil body and the second layer coil body, respectively, by the plurality of connection coil bodies.
  3. 3. The head device structure according to claim 2, wherein the first layer coil bodies are arranged to extend in a second direction, the second layer coil bodies are arranged to extend in a direction forming an angle with the second direction, the connection coil bodies are arranged to extend in a stacking direction, both ends of each of the second layer coil bodies are connected to adjacent two of the first layer coil bodies through the connection coil bodies, respectively, a first end of the second layer coil body is connected to a first end of one of the first layer coil bodies, and a second end of the second layer coil body is connected to a second end of the other of the first layer coil bodies; the second direction and the first direction are two directions intersecting in a plane where the substrate layer is located.
  4. 4. The structure of any one of claims 1 to 3, wherein the coil is spirally wound on the first magnetically permeable layer, the second magnetically permeable layer is outwardly convex, or the coil is spirally wound on the second magnetically permeable layer, the first magnetically permeable layer is outwardly convex.
  5. 5. The structure of any one of claims 1 to 4, wherein a first end of the first magnetically permeable layer is stepped toward the second magnetically permeable layer, and the first end of the first magnetically permeable layer includes a first pole tip for forming the head air gap, the first pole tip having a flux cross section smaller than a flux cross section of a body of the first magnetically permeable layer.
  6. 6. The head device structure of claim 5, wherein the first end of the first magnetically permeable layer further comprises a magnetically permeable portion connected between the body of the first magnetically permeable layer and the first pole tip.
  7. 7. The head device structure of claim 6, wherein the magnetically permeable portion is tapered in a projection onto the read/write surface, the projection being tapered toward the first pole tip.
  8. 8. The structure of any one of claims 5 to 7, wherein a material magnetic induction of the first pole tip portion is greater than a material magnetic induction of other portions of the first magnetically permeable layer.
  9. 9. The structure of any one of claims 1 to 8, wherein a first end of the second magnetically permeable layer is stepped toward the first magnetically permeable layer, and the first end of the second magnetically permeable layer includes a second pole tip for forming the head air gap, the second pole tip having a flux cross section smaller than a flux cross section of a body of the second magnetically permeable layer.
  10. 10. The head device structure of claim 9, wherein a projection of the magnetically permeable section of the second magnetically permeable layer, where the first end is connected to the second pole tip, on the read/write surface is tapered toward the second pole tip.
  11. 11. The head device structure of claim 9 or 10, wherein the material magnetic induction of the second pole tip is greater than the material magnetic induction of the other portion of the second magnetically permeable layer.
  12. 12. The head device structure of any one of claims 1 to 11, further comprising a ground layer, the ground layer stack being formed on the magnetic via.
  13. 13. The head device structure according to any one of claims 1 to 12, wherein the coils and the magnetic paths stacked on the substrate layer are arranged in plural groups and are sequentially spaced apart in a second direction.
  14. 14. The head device structure of claim 13, wherein the two connection terminals of each of the coils are electrically connected to the corresponding external electrode through a first interconnection layer and a second interconnection layer, respectively, the first interconnection layer being stacked on one end of the coil and connected to the first external electrode, and the second interconnection layer being stacked on the other end of the coil and connected to the second external electrode, respectively, in a third direction.
  15. 15. The head device structure of claim 14, wherein the first outer electrode and the second outer electrode are located on a same side surface of the head device structure.
  16. 16. The head device structure of any one of claims 1 to 12, further comprising a flat coil surrounding the magnetically conductive connection, a portion of the coil structure of the flat coil being located between the first magnetically conductive layer and the second magnetically conductive layer.
  17. 17. The head device structure of claim 16, wherein a plurality of said flat coils are provided, and a plurality of said flat coils are disposed at intervals along an extending direction of said magnetically conductive connection portion.
  18. 18. A magnetic head, characterized in that the magnetic head comprises a head device employing the head device structure of any one of claims 1 to 17.
  19. 19. A magnetic storage device comprising a housing, a magnetic head, and a magnetic storage medium, the magnetic head and the magnetic storage medium being located within the housing, the magnetic head employing the magnetic head of claim 18.
  20. 20. The magnetic storage device of claim 19, wherein the magnetic storage medium is a magnetic tape or the magnetic storage medium is a magnetic disk.

Description

Read-write head device structure, magnetic head, magnetic storage device and electronic equipment Technical Field Embodiments of the present application relate to the field of data storage technologies, and in particular, to a read-write head device structure, a magnetic head, a magnetic storage device, and an electronic apparatus. Background With the rapid development of the computing and storage fields, the storage density of magnetic storage media is continually increasing. The demand for high density writing of magnetic storage is also increasing in order to be able to store more data in the same physical space. In the conventional data write head technology, data is read and written at different positions on a magnetic disk or a magnetic tape through a write head array, so that the data transmission rate is improved, and a single device structure of the write head array adopts a flat coil structure. The physical size of the magnetic head cannot be adapted to a narrower track width due to the structural form of the flat coil, and the improvement and evolution of the writing magnetic field density in unit area are directly affected. Disclosure of Invention The embodiment of the application provides a read-write head device structure, a magnetic head, a magnetic storage device and electronic equipment, and the write-in magnetic field density and the read-write efficiency in a unit area can be improved through structural optimization. The first aspect of the embodiment of the application provides a read-write head device structure, which comprises a coil and a magnetic circuit, wherein the coil and the magnetic circuit are stacked on a substrate layer, the coil and the magnetic circuit are embedded in an insulating dielectric layer, the magnetic circuit comprises a first magnetic conduction layer and a second magnetic conduction layer, the first magnetic conduction layer is arranged close to the substrate layer, the second magnetic conduction layer is positioned on one side of the first magnetic conduction layer far away from the substrate layer, a magnetic head air gap is formed between the first end of the first magnetic conduction layer and the first end of the second magnetic conduction layer, an opening of the magnetic head air gap is positioned on a read-write surface of the read-write head device structure, the second end of the first magnetic conduction layer and the second end of the second magnetic conduction layer are connected through a magnetic conduction connecting part, and the coil is spirally coiled on the first magnetic conduction layer or the second magnetic conduction layer and is coiled layer by layer along a first direction of the extension of the first magnetic conduction layer or the second magnetic conduction layer. The three-dimensional space of the read-write head is fully utilized to form the coil structure, the coil is spirally wound between the first end and the second end of the first magnetic conduction layer or the second magnetic conduction layer, the size of the read-write head device in the extending direction of the read-write surface can be reduced, the writing magnetic field density in a unit area is effectively improved, and the writing requirement of higher density can be achieved. In addition, on the basis of improving the writing magnetic field density, the number of the read-write head devices which can be arranged in a unit area can be increased, and the speed of data parallel transmission is improved, so that the data reading and writing efficiency is improved. In the whole, through the improvement of magnetic field writing density and reading and writing efficiency, good magnetic storage performance can be obtained, and the use requirements of different data high-density storage scenes are met. According to a first implementation manner of the first aspect, the coil comprises a first layer of coil body, a connecting coil body and a second layer of coil body which are sequentially formed in a stacking direction, wherein the first layer of coil body is positioned on one side of a coiled magnetic conducting layer (such as a first magnetic conducting layer or a second magnetic conducting layer), the second layer of coil body is positioned on the other side of the coiled magnetic conducting layer, and the first layer of coil body and the second layer of coil body are sequentially arranged at intervals in the first direction and are respectively connected with two ends of the first layer of coil body and the second layer of coil body through the connecting coil body to form a coil wound layer by layer. Therefore, the material can be formed through a stacking growth process, and has good manufacturability. Based on the first implementation manner of the first aspect, the embodiment of the application further provides a second implementation manner of the first aspect, wherein the first layer coil bodies are arranged in an extending manner along the second direction,