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 having a base casting that provides attachment points for the major components of the head disk assembly and a cover for enclosing the major components of the head disk assembly. The base casting has a hermetic seal encompassing an outer perimeter of the base casting. The hermetic seal is juxtaposed to at least one complementary surface on the cover. The cover has a semi-hermetic seal inside a perimeter of the complementary surface for the hermetic seal. The semi-hermetic seal is juxtaposed to at least one complementary surface on the base casting.
Claims21
A sealed head disk assembly comprising:
- a base casting for providing attachment points for the major components of the head disk assembly, said base casting comprising a hermetic seal encompassing an outer perimeter of said base casting thus allowing said hermetic seal to be juxtaposed to at least one complementary surface on a cover;
- and
- said cover for enclosing said major components of said head disk assembly, said cover comprising a semi-hermetic seal inside a perimeter of said complementary surface for said hermetic seal thus allowing said semi-hermetic seal to be juxtaposed to at least one said complementary surface on said base casting.
A cover for a head disk assembly for providing a hermetic seal and a semi-hermetic seal comprising:
- a complementary surface for said hermetic seal and;
- said semi-hermetic seal encompassing the perimeter of said cover.
A base casting for head disk assembly for providing a hermetic seal and a semi-hermetic seal, said base casting comprising:
- a complementary surface for said semi-hermetic seal and;
- said hermetic seal encompassing the perimeter of said base casting.
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 a hermetic seal encompassing an outer perimeter of said base casting, said hermetic seal is juxtaposed to at least one complementary surface on a cover;
- attaching said cover that encloses the major components of the head disk assembly;
- wherein said cover comprises a semi-hermetic seal inside a perimeter of complementary surface for said hermetic seal, said semi-hermetic seal is 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.