System for manufacturing a group of head gimbal assemblies (HGAs)
AssigneeWestern Digital (Fremont), LLC
InventorsVictor K. F. Dunn, Ciuter Chang
Life of this patent
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Abstract
A system and method for the production level screening of low flying magnetic heads in the manufacture of disk drive head disk assemblies (HDAs) is disclosed. A test disk is provided and has a plurality of bumps extending from at least one surface thereof to a predetermined height between 2 and 12 nanometers. The test disk is rotated to fly a head of a head gimbal assembly selected from the group adjacent the surface of the test disk. An interaction of the head with one or more of the plurality of bumps may be sensed and the head gimbal assembly may be screened out from the group in response to the sensing of the interaction.
Claims6
A system for manufacturing a group of head gimbal assemblies (HGAs), said system comprising:
- a first test disk region including a magnetic layer;
- a second test disk region having a plurality of bumps extending therefrom to a predetermined height greater than 2 nm and less than 12 nm;
- a rotation mechanism rotating either or both test disk regions;
- a positioning mount positioning a head of an HGA selected from the group adjacent the second test disk region;
- write/read electronics causing the positioned head to write data to and read data from the first test disk region;
- and
- a sensor for sensing an interaction of the positioned head with one or more of the plurality of bumps.
Dependencies are inferred from the claim text.