System for manufacturing a group of head gimbal assemblies...

Details System for manufacturing a group of head gimbal assemblies... System for manufacturing a group of head gimbal assemblies...

2011-04-05

2011-04-05

Banks, Derris H (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S603010, C029S603020, C029S603040, C029S603060, C360S324000

Reexamination Certificate

active

07918013

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.

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