Disk drive thermally assisted magnetic recording head having a slider and a tilted light incident surface

Abstract

A thermally assisted magnetic recording head and a thermally assisted magnetic recording disk drive are disclosed. The thermally assisted magnetic recording head includes a slider body, a laser substrate, a laser and a magnetic head, wherein the laser substrate is provided on the slider body, the laser is provided on the laser substrate, and the magnetic head is provided at a front end of the slider body. The magnetic head includes an optical waveguide facing the laser. The angle between a light incident surface of the optical waveguide and an incident direction of a laser light incident on the optical waveguide is less than 90 degrees. The thermally assisted magnetic recording disk drive includes a plurality of magnetic disks and a magnetic head suspending frame. A front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads mentioned above.

Claims

1. A thermally assisted magnetic recording head, comprising a slider body, a laser substrate, a laser and a magnetic head, wherein the laser substrate is provided on the slider body, the laser is provided on the laser substrate, the magnetic head is provided at a front end of the slider body, the magnetic head comprises an optical waveguide facing the laser, and an angle between a tilted light incident surface of the optical waveguide and an incident direction of a laser light directly incident on the optical waveguide is less than 90 degrees; wherein a surface of the laser substrate contacting the slider body and a surface of the slider body bearing the laser substrate are both horizontal; a surface, other than the light incident surface of the optical waveguide, of the magnetic head facing the laser and a surface of the laser facing the magnetic head are both horizontal; and a surface of the magnetic head facing the slider body and a surface of the slider body facing the magnetic head are both vertical.

2. The thermally assisted magnetic recording head according to claim 1, wherein the angle between the light incident surface and the incident direction is 4587 degrees.

3. A thermally assisted magnetic recording disk drive comprising a plurality of magnetic disks and a magnetic head suspending frame, wherein a front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads as claimed in claim 2.

4. The thermally assisted magnetic recording head according to claim 2, wherein the angle between the light incident surface and the incident direction is 82 degrees.

5. A thermally assisted magnetic recording disk drive comprising a plurality of magnetic disks and a magnetic head suspending frame, wherein a front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads as claimed in claim 4.

6. The thermally assisted magnetic recording head according to claim 1, wherein the light incident surface is formed by ion beam etching.

7. A thermally assisted magnetic recording disk drive comprising a plurality of magnetic disks and a magnetic head suspending frame, wherein a front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads as claimed in claim 6.

8. The thermally assisted magnetic recording head according to claim 1, wherein the light incident surface is formed by mechanical lapping.

9. A thermally assisted magnetic recording disk drive comprising a plurality of magnetic disks and a magnetic head suspending frame, wherein a front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads as claimed in claim 8.

10. The thermally assisted magnetic recording head according to claim 1, wherein the light incident surface and an end face of a cladding of the optical waveguide are disposed on a same plane.

11. A thermally assisted magnetic recording disk drive comprising a plurality of magnetic disks and a magnetic head suspending frame, wherein a front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads as claimed in claim 10.

12. The thermally assisted magnetic recording head according to claim 1, wherein a normal direction of the light incident surface is tilted forwards, backwards, leftwards, or rightwards relative to the incident direction.

13. A thermally assisted magnetic recording disk drive comprising a plurality of magnetic disks and a magnetic head suspending frame, wherein a front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads as claimed in claim 12.

14. A thermally assisted magnetic recording disk drive comprising a plurality of magnetic disks and a magnetic head suspending frame, wherein a front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads as claimed in claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The present application will be further described with the combination of the following embodiments and the accompanying drawings, wherein:

(2) FIG. 1 is a schematic diagram of a thermally assisted magnetic recording head of the existing technology;

(3) FIG. 2 is a schematic diagram showing a light incident surface of an optical waveguide of the thermally assisted magnetic recording head of the existing technology;

(4) FIG. 3 is a schematic diagram of a thermally assisted magnetic recording head according to a first embodiment of the present application;

(5) FIG. 4 is a schematic diagram showing a light incident surface of an optical waveguide of the thermally assisted magnetic recording head according to the first embodiment of the present application;

(6) FIG. 5 is a schematic diagram of the process of forming the light incident surface of the optical waveguide of the thermally assisted magnetic recording head according to the first embodiment of the present application;

(7) FIG. 6 is a schematic diagram of the thermally assisted magnetic recording head according to a second embodiment of the present application;

(8) FIG. 7 is a schematic diagram of the thermally assisted magnetic recording head according to a third embodiment of the present application;

(9) FIG. 8 is a schematic diagram of the thermally assisted magnetic recording head according to a fourth embodiment of the present application;

(10) FIG. 9 is a schematic diagram of the thermally assisted magnetic recording head according to a fifth embodiment of the present application;

(11) FIG. 10 is a schematic diagram of a thermally assisted magnetic recording disk drive according to an embodiment of the present application.

DETAILED DESCRIPTION

(12) In order to have a clearer understanding of the technical characteristics, purposes and effects of the present application, the embodiments of the present application are described in detail with reference to the drawings.

(13) Detailed descriptions of the embodiments of the thermally assisted magnetic recording head and the thermally assisted magnetic recording disk drive of the present application are described below. These embodiments are shown in the accompanying drawings, where from the beginning to the end, the same or similar reference numbers are used to denote the same or similar components having the same or similar functions.

(14) In the description of the embodiments of the thermally assisted magnetic recording head and the thermally assisted magnetic recording disk drive of the present application, it is necessary to understand that the terms front, back, upper, lower, top end, bottom end, upper portion, lower portion and other indications of orientation or position are based on the orientation or position of the devices or components shown in the drawings and are used for the purpose of describing the present application and simplifying the description, rather than indicating or implying that the devices or components must be in a specific orientation and have a specific construction or operation. Therefore, those terms cannot be considered as a limitation of the present application. In addition, the terms first, second, etc. are used for description purposes only and cannot be construed as indicative or suggestive of relative importance.

(15) FIGS. 3 and 4 show the first embodiment of the thermally assisted magnetic recording head of the present application. In the embodiment, the thermally assisted magnetic recording head includes a slider body 100, a laser substrate 200, a laser 300 and a magnetic head 400. The laser substrate 200 is provided on the slider body 100. The laser 300 is provided on the laser substrate 200. The laser 300 can be a semiconductor laser for the generation of laser light. The magnetic head 400 is provided at a front end of the slider body 100, and the magnetic head 400 includes an optical waveguide 410 facing the laser 300. The angle between a light incident surface 411 of the optical waveguide 410 and an incident direction 310 of a laser light incident on the optical waveguide 410 is less than 90 degrees. Since the light incident surface 411 is not perpendicular to the incident direction 310 of the laser light, even a portion of the laser light is reflected, the laser light reflected from the light incident surface will not go back to the laser along the incident route. This can prevent the issues of laser emission instability and mode hopping due to the return of laser light to the laser along the original incident route. The angle between the light incident surface 411 and the incident direction 310 can be 4587 degrees, preferably 82 degrees. Furthermore, referring to FIG. 3, a surface 200A of the laser substrate 200 contacting the slider body 100 and a surface 100A of the slider body 100 bearing the laser substrate 200 are both horizontal; a surface 400A, other than the light incident surface 411 of the optical waveguide 410, of the magnetic head 400 facing the laser 300 and a surface 300A of the laser 300 facing the magnetic head 400 are both horizontal; and a surface 400B of the magnetic head 400 facing the slider body 100 and a surface 100B of the slider body 100 facing the magnetic head 400 are both vertical.

(16) Referring to FIG. 5, the light incident surface 411 of the optical waveguide 410 may be formed by ion beam etching. Specifically, an end face of a cladding of the optical waveguide 410 is provided with photoresist 421. Then, ion beam etching is performed. After the ion beam etching is completed, a titled light incident surface 411 is formed. Of course, the light incident surface 411 may also be formed mechanical lapping, and is not limited to ion beam etching.

(17) In the embodiment shown in FIG. 3, a normal line 412 of the light incident surface 411 of the optical waveguide 410 is tilted forwards relative to the incident direction 310.

(18) In the embodiment shown in FIG. 6, the normal line of the light incident surface 411 of the optical waveguide 410 is tilted leftwards relative to the incident direction 310.

(19) In the embodiment shown in FIG. 7, the normal line of the light incident surface 411 of the optical waveguide 410 is tilted backwards relative to the incident direction 310.

(20) In the embodiment shown in FIG. 8, the normal line of the light incident surface 411 of the optical waveguide 410 is tilted rightwards relative to the incident direction 310.

(21) In the embodiment shown in FIG. 9, the light incident surface 411 of the optical waveguide 410 and an end face 431 of a cladding of the optical waveguide 410 are disposed on a same plane.

(22) The present application also provides a thermally assisted magnetic recording disk drive 1000 having a plurality of magnetic disks 1001 and a magnetic head suspending arm 1002. A front end of the magnetic head suspending arm 1002 is provided with the thermally assisted magnetic recording heads 1003 mentioned above.

(23) The embodiments of the present application are described in conjunction with the accompanying drawings. However, the present application is not limited to the specific embodiments mentioned above. The above-mentioned specific embodiments are only indicative and not restrictive. A technical person of ordinary skill in the art under the inspiration of the present application, without departing from the object of the present application and the scope of protection defined by the claims, may come up with many forms which fall within the protection of the present application.