Patent ID: 7911732

Claim:
A disk drive case comprising: a single cover formed by one piece and comprising at least one screw hole formed through said single cover; a base casting for providing attachment points for components and sub-assemblies of the head disk assembly, said base casting comprising a semi-hermetic seal encompassing an outer perimeter of said base casting thus allowing said semi-hermetic seal to be juxtaposed to at least one complementary surface on said single cover; and said single cover for enclosing said components and sub-assemblies of said head disk assembly, said single cover comprising a hermetic seal formed by an outside of a perimeter of said complementary surface for said semi-hermetic seal thus allowing said hermetic seal to be juxtaposed to at least one said complementary surface on said base casting, wherein said at least one screw hole is configured to deform a portion of said single cover when a screw is fastened in said at least one screw hole which provides a spring force to seal said hermetic seal between said single cover and said base casting.