Patent ID: 8656758

Claim:
A testing apparatus for a cover of a hard-disk drive (HDD), comprising: a base structure comprising a concave recess shaped to receive the cover, wherein when the cover is disposed within the concave recess, the cover forms a first chamber in the concave recess between the cover and the base structure; and a removable lid that covers the concave recess, wherein when the removable lid covers the concave recess with the cover disposed therein, the removable lid forms a second chamber in the concave recess between the cover, the base structure, and the removable lid; a means for introducing helium gas to the first chamber, and a mass spectrometer means for detecting an amount of helium gas leaking from the first chamber to the second chamber, wherein the size of the first chamber is designed to accommodate enough helium gas to perform a surface induced diffusive leakage (SIDIL) test of the cover while minimizing an amount of helium gas required for SIDIL test.