Hermetically sealed head disk assembly and method of sealing with soldering material
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsMichael Hatchett, Kirk Price
Life of this patent
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Abstract
A sealed head disk assembly has a cover for enclosing major components of the head disk assembly. The cover has a hermetic seal encompassing an outer perimeter of the cover and a semi-hermetic seal inside a perimeter of the hermetic seal. The hermetic seal and semi-hermetic seal are juxtaposed to at least one complementary surface on the base casting. The base casting, which provides attachment points for the major components of the head disk assembly has at least one complementary surface.
Claims21
A sealed head disk assembly comprising:
- a cover for enclosing major components of said head disk assembly, said cover comprising a hermetic seal encompassing an outer perimeter of said cover, a semi-hermetic seal inside a perimeter of said hermetic seal, thus allowing said hermetic seal and said semi-hermetic seal to be juxtaposed to at least one complementary surface on a base casting;
- and
- said base casting for providing attachment points for the major components of the head disk assembly, said base casting comprising at least one said complementary surface.
A base casting for head disk assembly for providing a hermetic seal and a semi-hermetic seal, said base casting comprising:
- at least one complementary surface for said hermetic seal and;
- at least one complementary surface for said semi-hermetic seal.
A cover for a head disk assembly for providing a hermetic seal and a semi-hermetic seal comprising:
- a hermetic seal encompassing an outer perimeter of said cover and;
- a semi-hermetic seal inside a perimeter of said hermetic seal.
A method of producing a sealed head disk assembly comprising:
- assembling major components of the head disk assembly into a base casting that provides major component attachment points;
- wherein said base casting comprises at least one complimentary surface that is juxtaposed to a hermetic seal and a semi-hermetic seal on a cover;
- attaching said cover that encloses the major components of the head disk assembly;
- wherein said cover comprises a hermetic seal encompassing an outer perimeter of said cover, a semi-hermetic seal inside a perimeter of said hermetic seal, thus allowing said hermetic seal and said semi-hermetic seal to be juxtaposed to at least one complementary surface on said base casting;
- introducing an atmosphere into said sealed disk assembly;
- performing testing of said sealed head disk assembly;
- removing said cover enabling repairs to said sealed head disk assembly when said testing fails;
- re-attaching said cover upon completion of said repairs;
- re-introducing said atmosphere into said sealed head disk assembly;
- and
- activating said hermetic seal.
Dependencies are inferred from the claim text.