Disk drive having a disk drive component adhered to the disk drive housing via an adhesive assembly having a leveling layer

1. A disk drive comprising:

a disk drive housing having a breather hole formed through the disk drive housing; and

a breather filter configured for attachment to the disk drive housing and for limiting and filtering airflow into the disk drive housing, the breather filter including a breather filter housing portion having a breather filter housing surface defining a filter housing hole configured to align with the breather hole formed in the disk drive housing, and a filter portion fitted within the filter housing portion;

a leveling layer defining a first leveling layer surface and a second leveling layer surface, the leveling layer being formed of a material that is impermeable to air;

a first adhesive layer, the first adhesive layer being configured to adhere the breather filter housing surface to the first leveling layer surface;

a second adhesive layer, the second adhesive layer being configured to adhere the second leveling layer surface to the disk drive housing, the leveling layer and the first and second adhesive layers defining respective openings that are in fluid communication with the filter housing hole and the breather hole to collectively form a delimited and sealed airflow inlet to the disk drive.

2. The disk drive of claim 1 , wherein the leveling layer includes foam.

3. The disk drive of claim 2 , wherein the leveling layer includes a closed cell foam.

4. The disk drive of claim 1 , wherein a thickness of the leveling layer is dependent upon a degree of roughness of the disk drive housing and of the breather filter housing surface.

5. The disk drive of claim 1 , wherein the disk drive housing has a first roughness that defines a first maximum difference in elevation from a first reference plane and the filter housing surface has a second roughness that defines a second maximum difference in elevation from a second reference plane and wherein a thickness of the leveling layer is at least equal to a sum of the first maximum difference in elevation and the second maximum difference in elevation.

6. The disk drive of claim 1 , wherein the material of the leveling layer is configured to prevent water absorption and vapor transmission into the disk drive housing.

7. A disk drive comprising:

a disk drive housing, the disk drive housing having a housing surface that defines a first surface roughness; and

a disk drive component configured for attachment to the disk drive housing, the disk drive component including a component surface that defines a second surface roughness;

a leveling layer defining a first leveling layer surface and a second leveling layer surface, the leveling layer being formed of a material that is impermeable to air;

a first adhesive layer, the first adhesive layer being configured to adhere the component surface to the first leveling layer surface, and

a second adhesive layer, the second adhesive layer being configured to adhere the second leveling layer surface to the disk drive housing, the leveling layer having a thickness that is sufficient to enable the leveling layer in combination with the first and second adhesive layers to adhere the disk drive component to the disk drive housing in an airtight manner that compensates for the first surface roughness and for the second surface roughness.

8. The disk drive of claim 7 , wherein the leveling layer includes foam.

9. The disk drive of claim 8 , wherein the leveling layer includes a closed cell foam.

10. The disk drive of claim 7 , wherein the material of the leveling layer is configured to prevent water absorption and vapor transmission into the disk drive housing.