Electric heating – Metal heating – By arc
Reexamination Certificate
2005-09-15
2009-06-23
Paik, Sang Y (Department: 3742)
Electric heating
Metal heating
By arc
C360S245700
Reexamination Certificate
active
07550695
ABSTRACT:
Embodiments of the invention correct the static attitude of a head gimbal assembly (HGA) with high accuracy. In one embodiment, a vector group that constitutes the shortest path from the initial attitude of the HGA to the final anticipatory attitude is formed. The vector group is formed of the plural displacement vectors that give a variety of variations in static attitude when unit shots of laser light are performed on the HGA. Displacement vectors are synthesized while the displacement vectors each giving the anticipatory attitude closest to a target attitude are being selected in order from the initial attitude, toward the target attitude. Unit shots equivalent to the number of displacement vectors are performed on irradiating positions related to the displacement vectors included in the vector group. The static attitude existing after the unit shots is measured, then the displacement vectors are corrected, and a vector group constituting the new shortest path is formed. Highly accurate attitude correction is thus realized.
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Ichimura Yohtaroh
Naka Kohichiroh
Uematsu Yoshio
Yoshida Tatsushi
Henkhaus John
Hitachi Global Storage Technologies - Netherlands B.V.
Paik Sang Y
Townsend and Townsend / and Crew LLP
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