| US 7,509,225 B2 | ||
| Vibration control of rotating disc | ||
| Ronald Eldon Anderson, Lakeville, Minn. (US); Klaus Obergfell, Minneapolis, Minn. (US); and Steven Ernest Wheeler, Northfield, Minn. (US) | ||
| Assigned to Seagate Technology LLC, Scotts Valley, Calif. (US) | ||
| Filed on Jan. 31, 2007, as Appl. No. 11/700,661. | ||
| Application 11/700661 is a division of application No. 11/056337, filed on Feb. 11, 2005. | ||
| Claims priority of provisional application 60/544040, filed on Feb. 12, 2004. | ||
| Prior Publication US 2007/0143057 A1, Jun. 21, 2007 | ||
| Int. Cl. G11B 5/455 (2006.01) | ||
| U.S. Cl. 702—108 | 12 Claims |
| 1. A method comprising:
placing a first surface of a shroud in close proximity to a first surface of a disc, wherein the disc is located on a spindle;
rotating the disc using the spindle; and
introducing a gas into a gap between the first surface of the shroud and the first surface of the disc; and
testing a head gimbal assembly on an opposing second surface of the disc;
wherein the placing includes positioning the first surface of the shroud as close as possible to the first surface of the
disc without making contact between the first surface of the shroud and the first surface of the disc; and
wherein the testing includes dynamic electrical testing of the head gimbal assembly on the bottom surface of the disc.
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