Embodiments include a method for adjusting the twist of an air bearing
surface of at least one slider to substantially match a target values for twist,
the at least one slider having a back surface opposite the air bearing surface,
the back surface including two sets of diagonally opposite corner regions, with
each set including one corner region adjacent to a leading edge of the slider and
one corner region adjacent to a trailing edge of the slider. The method includes
forming a first mechanical scribe on the back surface extending through at least
a portion of the corner regions adjacent to the leading edge of the slider and
forming a second mechanical scribe on the back surface extending through at least
a portion of the corner regions adjacent to the trailing edge of the slider. The
method also includes measuring the twist of the slider, and forming a first group
of laser scribes on the back surface in one of the two sets of diagonally opposite
corner regions, wherein each of the laser scribes intersects with one of the first
and second mechanical scribes. The method also includes measuring the twist of
the slider and comparing the values to the target value for twist, and forming
additional laser scribes if the target value for twist is not reached.
