Tester with virtual ground
AssigneeWestern Digital Technologies, Inc.
InventorsMichael Nojaba, Pradeep K. Thayamballi, James Tze-Hwa Tung, Julius A. Turangan
Life of this patent
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Abstract
A tester system includes a tester and a radioactive isotope source. The tester includes a spindle assembly, a disk mounted to the spindle assembly, and a head actuatable over the disk. The radioactive isotope source is positioned in an ionizing location proximate the tester, such that a minimum distance between the radioactive isotope source and an axis of rotation of the disk is less than a radius of the disk.
Claims25
A method of manufacturing disk drives, the method comprising:
- providing a radioactive isotope source;
- providing a tester including a spindle assembly, a disk mounted to the spindle assembly, and a head;
- positioning the radioactive isotope source from a far location at a distance greater than the radius of the disk to an ionizing location proximate the tester, such that a minimum distance between the radioactive isotope source and an axis of rotation of the disk is less than a radius of the disk;
- spinning the disk using the spindle assembly;
- and
- accessing the disk using the head.
The method of manufacturing disk drives, the method comprising:
- providing a radioactive isotope source;
- providing a tester including a spindle assembly, a disk mounted to the spindle assembly, and a head;
- positioning the radioactive isotope source to an ionizing location proximate the tester, such that a minimum distance between the radioactive isotope source and an axis of rotation of the disk is less than a radius of the disk, wherein positioning the radioactive isotope source in the ionizing location includes actuating a mounting arm carrying the radioactive isotope source;
- spinning the disk using the spindle assembly;
- and
- accessing the disk using the head.
A tester system, comprising:
- a tester including:
- a spindle assembly;
- a disk mounted to the spindle assembly;
- and
- a head actuatable over the disk;
- and
- a radioactive isotope source positioned by a shroud in an ionizing location proximate the tester, such that a minimum distance between the radioactive isotope source and an axis of rotation of the disk is less than a radius of the disk.
A tester system, comprising:
- a spindle assembly;
- a disk mounted to the spindle assembly;
- and
- a head actuatable over the disk;
- a radioactive isotope source positioned in an ionizing location proximate the tester, such that a minimum distance between the radioactive isotope source and an axis of rotation of the disk is less than a radius of the disk;
- and
- a mounting arm configured to carry the radioactive isotope source.
Dependencies are inferred from the claim text.