Unlock instant, AI-driven research and patent intelligence for your innovation.

Magnetic head having an antistripping layer for preventing a magnetic layer from stripping

a magnetic layer and anti-stripping technology, applied in the field of magnetic heads, to achieve the effect of increasing the adhesion of the magnetic layer and improving the adhesion between the conductive layer and the substrate or the insulating layer

Inactive Publication Date: 2006-06-08
HONJO HIROAKI +7
View PDF18 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a magnetic head and a manufacturing process for it that can resolve various problems associated with using high-Bs soft magnetic films in a magnetic device. The technical effects of this invention include improving the adhesion between the magnetic layer and the substrate, reducing stripping of the conductive layer, and increasing the adhesion of the magnetic layer. The invention also provides a magnetic storage device with the improved magnetic head. The non-magnetic layer used in the invention can be made of titanium, tantalum, chromium, yttrium, zirconium, hafnium, niobium, molybdenum, tungsten, or other non-magnetic materials. The magnetic layer can be made of cobalt, nickel, iron, or a combination of these elements. The insulating layer can be made of a first insulating layer, a write coil, and a second insulating layer. The combination of the insulating layer and the write coil can be made by successively laminating a first insulating layer, the write coil, and a second insulating layer.

Problems solved by technology

However, when the first (lower) and the second (upper) magnetic layers are formed using the high-Bs soft magnetic film, problems arise as follows:

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Magnetic head having an antistripping layer for preventing a magnetic layer from stripping
  • Magnetic head having an antistripping layer for preventing a magnetic layer from stripping
  • Magnetic head having an antistripping layer for preventing a magnetic layer from stripping

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0052] Referring to FIGS. 3 and 4, the description will proceed to a magnetic head according to this invention. FIG. 3 is an air bearing surface (ABS) view of the magnetic head. FIG. 4 is a vertical sectional view taken along the lines IV-IV of FIG. 3. In FIGS. 3 and 4, similar components and part to those in FIGS. 1 and 2 are depicted by like reference numerals and description of such components and parts will be omitted.

[0053] The illustrated magnetic head is a merged GMR head which comprises a giant magnetoresistence (GMR) read head and an inductive (ID) write head.

[0054] The magnetic head comprises the ceramic substrate 11 serving as the slider. The ceramic substrate 11 is made of complex or composite ceramic consisting of alumina (Al2O3) and titanium carbide. On the ceramic substrate 11, the GMR read head having a reproducing function is formed.

[0055] The GRM read head comprises the first magnetic shield layer 12, the second magnetic shield layer 15, the magnetic separation l...

second embodiment

[0068] Referring to FIGS. 7 and 8, the description will proceed to a magnetic head according to this invention. FIG. 7 is an air bearing surface (ABS) view of the magnetic head. FIG. 8 is a vertical sectional view taken along the lines VIII-VIII of FIG. 7. In FIGS. 7 and 8, similar components and part to those in FIGS. 3 and 4 are depicted by like reference numerals and description of such components and parts will be omitted.

[0069] The illustrated magnetic head is similar in structure and operation to the magnetic head illustrated in FIGS. 3 and 4 except that the second non-magnetic layer 24 and the second conductive layer 25 are omitted from the magnetic head illustrated in FIGS. 3 and 4. In other words, the illustrated magnetic head is provided with the first non-magnetic layer 22 and the first conductive layer 23 alone. With this structure, it is possible to prevent the first magnetic layer 16 from stripping caused by a stress in the CoNiFe film which includes no stress relievin...

third embodiment

[0070] Referring to FIGS. 9 and 10, the description will proceed to a magnetic head according to this invention. FIG. 9 is an air bearing surface (ABS) view of the magnetic head. FIG. 10 is a vertical sectional view taken along the lines X-X of FIG. 9. In FIGS. 9 and 10, similar components and part to those in FIGS. 3 and 4 are depicted by like reference numerals and description of such components and parts will be omitted.

[0071] The illustrated magnetic head is similar in structure and operation to the magnetic head illustrated in FIGS. 3 and 4 except that the first non-magnetic layer 22 and the first conductive layer 23 are omitted from the magnetic head illustrated in FIGS. 3 and 4. In other words, the illustrated magnetic head is provided with the second non-magnetic layer 24 and the second conductive layer 25 alone. With this structure, it is possible to prevent the second magnetic layer 21 from stripping caused by the stress of the CoNiFe which includes no stress relieving age...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

By inserting a first antistripping layer comprising a first non-magnetic layer 22 and a first conductive layer 23 between a first magnetic layer 16 and a magnetic separation layer 13, adhesion between the first conductive layer 23 and the magnetic separation layer 13 is improved to prevent the first magnetic layer 16 from stripping. In addition, by inserting a second antistripping layer comprising a second non-magnetic layer 24 and a second conductive layer 25 between a second magnetic layer 21 and a magnetic gap layer 17, adhesion between the second conductive layer 24 and the magnetic gap layer 17 is improved to prevent the second magnetic layer 25 from stripping.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS [0001] This is a continuation-in-part application of U.S. application Ser. No. 09 / 672,597, filed on Sep. 28, 2000, now abandoned.BACKGROUND OF THE INVENTION [0002] This invention relates to a magnetic head for recording information on a magnetic recording medium, to a method of manufacturing the magnetic head, and to a magnetic storage unit using the magnetic head. [0003] A magnetic recording medium is disclosed, for example, in Japanese Unexamined Patent Publication of Tokka: No. Hei 9-138,930 (or JP-A 9-138930). JP-A 9-138930 provides a magnetic recording medium to obtain high magnetic characteristics and to improve adhesion property between a substrate and a base layer. According to JP-A 9-138930, first base layers, second base layers, magnetic layers and lubricant layers are successively formed on a substrate. Among the base layers, the first base layers formed near the substrate have higher specific heat than that of the second base laye...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): G11B5/147G11B5/00G11B5/31G11B5/39G11B5/40
CPCB82Y10/00B82Y25/00G11B5/00G11B5/3103G11B5/3109G11B5/3116Y10T29/49044G11B5/314G11B5/3143G11B5/3163G11B5/3967G11B5/40G11B2005/3996G11B5/3133
Inventor HONJO, HIROAKIISHI, TSUTOMUSAITO, MIKIKOSAITO, SHINSAKUTOBA, TAMAKINONAKA, YOSHIHIROHAYASHI, KAZUHIKOISHIWATA, NOBUYUKI
Owner HONJO HIROAKI