Liquid crystal material sealed housing

• US 8,014,167 B2
• Filed: 09/07/2007
• Issued: 09/06/2011
• Est. Priority Date: 09/07/2007
• Status: Active Grant

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Mewes, Michael A., Dittmer, Daniel D., Gunderson, Neal F.
• Primary Examiner(s): Chen; Xiaoliang
• Application Number:
  US11/851,820
• Publication Number:
  US 20090073328A1
• Time in Patent Office: 1,460 Days
• Field of Search: 361/800, 361/685, 361/760, 174/250, 174/262, 174/526, 174/535, 174/548, 174/541, 360/97.01, 360/97.02, 298/30, 438/29, 349/86, 349/149, 349155-157, 349/190
• US Class Current: 361/800
• CPC Class Codes: F16J 15/102 characterised by material
• CPC Class Codes: F16J 15/128 with metal covering
• CPC Class Codes: G11B 33/1466 sealing gaskets, gasket in general F16J
• CPC Class Codes: H05K 5/061 sealed by a gasket held between a removable cover and a body, e.g. O-ring, packing
• CPC Class Codes: Y10T 29/49126 Assembling bases

Abstract

A hermetically sealed housing having a base deck, a cover member and a seal assembly constructed of a liquid crystal material (LCM), the base deck and cover member forming an enclosure containing an inert gas atmosphere. Various embodiments have the LCM seal bonded to one or both of the base deck and cover member and bonded to seal the enclosure by molding, compression, adhesive bonding, thermoplastic welding or soldering, or a combination of such.

Claims

1. An apparatus comprising:

a housing having a base deck and a cover member; and

a liquid crystal material (LCM) seal adjoining the base deck and the cover member to enclose an inert gas atmosphere, the LCM seal plated with a metal coating and bonded to at least one of the base deck and the cover member via a metal-to-metal seam.

2. The apparatus of claim 1, wherein the inert gas atmosphere substantially comprises helium.

3. The apparatus of claim 1 wherein the LCM seal is bonded to one of the base deck and cover member via solder.

4. The apparatus of claim 3, wherein the solder contactingly engages the plated LCM seal, the cover member and the base deck.

5. The apparatus of claim 1, wherein the LCM seal is overmolded onto a selected one of the cover member or the base deck, and the metal-to-metal seam is formed between the metal coating of the LCM seal and a remaining one of the cover member or the base deck.

6. The apparatus of claim 1, in which the LCM seal hermetically seals the enclosed inert gas atmosphere within the housing.

7. The apparatus of claim 1, wherein the LCM seal comprises a base resin of liquid crystal polymer filled with reinforcing fibers.

8. The apparatus of claim 1, in which the LCM seal is thermally welded to provide the metal-to-metal seam.

9. An apparatus comprising a hermetically sealed housing which encloses an inert gas atmosphere, the housing comprising a base deck, a cover member, and a seal interposed therebetween, the seal comprising a liquid crystal material (LCM) plated with a layer of metal, said plated layer bonded to at least a selected one of the base deck or the cover member to provide a metal-to-metal seam.

10. The apparatus of claim 9, in which the selected one of the base deck or the cover member is formed of metal, and a layer of solder adjoins said selected one of the base deck or the cover member with the plated layer of the LCM seal.

11. The apparatus of claim 9, in which both the base deck and the cover member are formed of metal, and the layer of solder respectively adjoins the base deck and the cover member with the plated layer of the LCM seal.

12. The apparatus of claim 9, further comprising a fastener which compresses the LCM seal between the top cover and the base deck.

13. The apparatus of claim 9, in which the cover member and the base deck are each formed of metal.

14. The apparatus of claim 13, in which the plated layer of the LCM seal is soldered to the metal cover member and the metal base deck.

15. A method of hermetically sealing a housing having a cover member and a base deck, the method comprising:

placing a liquid crystal material (LCM) seal between the cover member and the base deck, the LCM seal having a metal coating layer; and

bonding the metal coating layer of the LCM seal to the base deck and the cover member to form a metal-to-metal seal that retains an inert gas atmosphere within the housing.

16. The method of claim 15, wherein the inert gas atmosphere is characterized as a helium atmosphere.

17. The apparatus method of claim 15 wherein the bonding step comprises soldering the metal coating layer to at least a selected one of the base deck or cover member to seal the housing.

18. The method of claim 17, further comprising molding the LCM seal to one of the cover member or the base deck prior to the bonding step.

19. The method of claim 15, in which the LCM seal comprises a first seal member and a second seal member, the method further comprising molding the first seal member to the cover member, molding the second member to the base deck, and soldering the first seal member to the second seal member to seal the enclosure.

20. The method of claim 15 wherein the step of bonding the first and second seal members comprises thermally welding the first seal member to the second seal member.