Method of sealing a re-workable hard disk drive

• US 10,079,043 B2
• Filed: 04/22/2015
• Issued: 09/18/2018
• Est. Priority Date: 04/22/2014
• Status: Active Grant

• Current Assignee: Entrotech, Inc.
• Original Assignee: Entrotech, Inc.
• Inventors: Strange, Andrew C.
• Primary Examiner(s): Kim, Paul D
• Application Number:
  US14/439,152
• Publication Number:
  US 20160104515A1
• Time in Patent Office: 1,245 Days
• Field of Search: 2960303, 2960304, 2960306, 360121, 360122, 360317
• CPC Class Codes: G11B 25/043 using rotating discs
• CPC Class Codes: G11B 33/027 Covers G11B33/022 takes precedence; with means for guiding the record carrier G11B17/34
• CPC Class Codes: G11B 33/1466 sealing gaskets, gasket in general F16J

Abstract

Cover seals for sealing of a re-workable hard disk drive comprise: a metallic substrate; an outwardly exposed adhesive layer on at least a portion of a major surface of the metallic substrate; and an adhesive-free border comprising a fusible metal alloy layer surrounding the adhesive layer. The cover seals can be used to form sealed hard disk drives, wherein a cover seal is attached to an exterior surface of the cover of an enclosed hard disk drive housing so that an adhesive layer of the cover seal covers the entire junction where the base and cover components of the enclosed housing meet and a metallic joint adheres a perimeter of the cover seal to the base of the enclosed housing.

Claims

1. A method of sealing a re-workable hard disk drive, comprising steps of:

providing a base component of a housing of the hard disk drive;

providing a cover component of the housing;

mating the base component and the cover component at a junction to form an enclosed housing that encloses disk drive components for facilitating reading and recording of data at any desired location on at least one disk contained within the enclosed housing, wherein the enclosed housing is free of conventional gasket and other materials between the base component and the cover component;

filling the enclosed housing with a desired gaseous medium;

providing a cover seal, wherein the cover seal comprises a metallic substrate and an outwardly exposed adhesive layer on at least a portion of a major surface thereof;

adhering the cover seal to at least a portion of an exterior surface of the cover component of the enclosed housing so that the adhesive layer of the cover seal covers the entire junction where the base and cover components of the enclosed housing meet;

optionally, testing the hard disk drive;

optionally, re-working the hard disk drive by first removing the cover seal;

optionally, after re-working the hard disk drive, applying a new cover seal to at least a portion of the exterior surface of the cover component of the enclosed housing so that the adhesive layer on the new cover seal covers the entire junction where the base and cover components of the enclosed housing meet; and

metallically joining the cover seal and the base component to form a sealed hard disk drive.

2. The method of claim 1, wherein the adhesive layer of the cover seal comprises a pressure-sensitive adhesive.

3. The method of claim 1, wherein the cover seal and the base component are metallically joined by soldering.

4. The method of claim 1, wherein the cover seal and the base component are metallically joined using lead-free solder.

5. The method of claim 1, wherein the cover seal and the base component are metallically joined using a eutectic solder.

6. The method of claim 1, wherein the cover seal and the base component are metallically joined using a fusible metal alloy having a lower melting point than that of the metallic substrate of the cover seal.

7. The method of claim 1, wherein the cover seal comprises a fusible metal alloy.

8. The method of claim 1, wherein the cover seal comprises a fusible metal alloy layer comprising an adhesive-free border on the cover seal and having a thickness of at least about 16 microns.

9. The method of claim 1, wherein the base component comprises a fusible metal alloy on at least an exterior surface thereof that mates with the cover seal.

10. The method of claim 1, wherein the cover seal and the base component are metallically joined using a fusible metal alloy layer(s) having a combined thickness of about 75 microns to about 250 microns at a position where a metallic joint is desired.

11. The method of claim 1, wherein the cover seal is adhesively attached to the entire exterior surface of the cover component of the enclosed housing.

12. The method of claim 1, wherein a through-hole for facilitating recharging of the gaseous medium within the enclosed housing is not present in the cover seal.

13. The method of claim 1, wherein the metallic substrate has a thickness of less than about 100 microns.

14. The method of claim 1, wherein the metallic substrate takes the form of a metal foil.

15. The method of claim 14, wherein the metal foil is a dead soft aluminum foil.

16. The method of claim 1, wherein the cover seal is flexible and conformable.

17. The method of claim 1, wherein at least one of length and width of the cover seal is at least about one-hundred times thickness of the cover seal.

18. The method of claim 1, wherein the metallic substrate comprises a reactive, multi-layer foil having at least two adjacent metallic layers.

19. The method of claim 1, wherein the metallic substrate comprises a metal foil laminate comprising a metal barrier layer adhesively bonded to a polymer layer.

20. The method of claim 1, wherein the metallic substrate takes the form of a metal coating.

21. The method of claim 1, wherein the metallic substrate is constrained.

22. The method of claim 1, wherein the cover seal is essentially free of fusible metal alloy.

23. The method of claim 1, wherein the junction where the base and cover components meet is on a top surface of the enclosed housing.

24. The method of claim 1, wherein the steps of providing and adhering the cover seal are performed after the step of filling the enclosed housing with the desired gaseous medium.