Heat-assisted magnetic recording drive enclosure with arcuate channel for accommodating laser diode unit

Patent metadata

Field	Value
Publication number	US-9805749-B1
Application number	US-201615094055-A
Country	US
Kind code	B1
Filing date	Apr 8, 2016
Priority date	Apr 8, 2016
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

An apparatus comprises a heat-assisted magnetic recording drive which includes an enclosure having a base and a cover. The drive includes a magnetic recording disk and a head gimbal assembly proximate one of the base and the cover. The HGA supports a slider assembly comprising a laser diode unit. The LDU projects away from the HGA towards one of the base and the cover. An arcuate channel is provided in one of the base and the cover and dimensioned to receive a distal portion of the LDU. The channel has a length that accommodates the distal portion of the LDU along a stroke of the HGA.

First claim

What is claimed is:

1. An apparatus, comprising:
a heat-assisted magnetic recording drive, comprising:
an enclosure comprising a base and a cover;
a magnetic recording disk;
a first head gimbal assembly (HGA) proximate the cover and supporting a first slider assembly comprising a first laser diode unit (LDU), the first LDU projecting away from the first HGA towards the cover;
a second HGA proximate the base and supporting a second slider assembly comprising a second LDU, the second LDU projecting away from the second HGA towards the base;
a first arcuate channel provided in the cover and dimensioned to receive a distal portion of the first LDU, the first channel having a length that accommodates the distal portion of the first LDU along a stroke of the first HGA; and
a second arcuate channel provided in the base and dimensioned to receive a distal portion of the second LDU, the second channel having a length that accommodates the distal portion of the second LDU along a stroke of the second HGA.

2. The apparatus of claim 1 , wherein the first and second channels have a generally square or rectangular cross-section.

3. The apparatus of claim 1 , wherein:
the first channel has a depth greater than a height of the distal portion of the first LDU that extends beyond the first HGA; and
the second channel has a depth greater than a height of the distal portion of the second LDU that extends beyond the second HGA.

4. The apparatus of claim 1 , wherein:
the first channel has a depth greater than about 120% of a height of the distal portion of the first LDU that extends beyond the first HGA; and
the second channel has a depth greater than about 120% of a height of the distal portion of the second LDU that extends beyond the second HGA.

5. The apparatus of claim 1 , wherein:
the first channel has a width that is greater than a width of the first LDU by at least about 20%; and
the second channel has a width that is greater than a width of the second LDU by at least about 20%.

6. The apparatus of claim 1 , wherein the first and second channels have a length that extends between an inner diameter of the disk and a landing pad of the drive.

7. The apparatus of claim 1 , wherein the first and second channels have a length ranging from about 27 mm to 30 mm.

8. The apparatus of claim 1 , wherein:
the first LDU comprises a first laser diode connected to a first submount;
the second LDU comprises a second laser diode connected to a second submount.

9. The apparatus of claim 1 , wherein the enclosure has a height of 7 mm.

10. The apparatus of claim 1 , wherein the enclosure has a height of 5 mm.

11. An apparatus, comprising:
a heat-assisted magnetic recording drive, comprising:
an enclosure comprising a base and a cover;
a magnetic recording disk;
at least one head gimbal assembly (HGA) proximate one of the base and the cover, the HGA comprising:
a load beam having a first surface, a second surface opposing the first surface, and an aperture;
a suspension connected to the second surface of the load beam and configured to support a slider assembly comprising a laser diode unit (LDU), the LDU extending through the aperture of the load beam and projecting away from the first surface toward one of the base and the cover; and
an arcuate channel provided in one of the base and the cover, the channel dimensioned to receive a distal portion of the LDU and having a length that accommodates the distal portion of the LDU along a stroke of the HGA.

12. The apparatus of claim 11 , wherein channel has a generally square or rectangular cross-section.

13. The apparatus of claim 11 , wherein the channel has a depth greater than a height of the distal portion of the LDU that extends beyond the HGA.

14. The apparatus of claim 11 , wherein the channel has a depth greater than about 120% of a height of the distal portion of the LDU that extends beyond the HGA.

15. The apparatus of claim 11 , wherein the channel has a width that is greater than a width of the LDU by at least about 20%.

16. The apparatus of claim 11 , wherein the channel has a length that extends between at least an inner diameter and an outer diameter of the disk.

17. The apparatus of claim 11 , wherein the channel has a length ranging from about 27 mm to 30 mm.

18. The apparatus of claim 1 , wherein the LDU comprises a laser diode connected to a first submount.

19. The apparatus of claim 1 , wherein the enclosure has a height of 7 mm.

20. The apparatus of claim 1 , wherein the enclosure has a height of 5 mm.

Assignees

• Seagate Technology Llc

Inventors

• Lee Chuen Buan
• Rausch Tim
• Liu Xiong
• Bi Qiang

Classifications

• G11B5/4826 Primary

  Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive (G11B5/484 takes precedence; details of head housings or structures G11B5/10, G11B5/127; adjustment relative to the record carrier G11B5/56) · CPC title

• G11B5/4873

  the arm comprising piezoelectric or other actuators for adjustment of the arm · CPC title

• G11B5/4866

  the arm comprising an optical waveguide, e.g. for thermally-assisted recording · CPC title

• G11B5/4833

  Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head (G11B5/484 takes precedence) · CPC title

• G11B5/484

  Integrated arm assemblies, e.g. formed by material deposition or by etching from single piece of metal or by lamination of materials forming a single arm/suspension/head unit · CPC title