Patent ID: 7301647

Claim:
A method for manufacturing a slider including a head for recording data into and reproducing data from a record carrier, and a floatation surface that floats above opposite to the record carrier, said method comprising the steps of: determining a correction target from among parameters based on a measurement result about the parameters, when the measurement result shows that at least one of the parameters deviate from a permissible range, the parameters including a crown representative of a deformation of the floatation surface in a longitudinal direction, a camber representative of a deformation of the floatation surface in a transverse direction orthogonal to the longitudinal direction, and a twist representative of a deformation of the floatation surface in a diagonal direction, the correction target being one of the parameters which is most deviated from the permissible range; determining a correction amount of the correction target based on the measurement result; setting an angle for scanning a laser to be irradiated onto a rear surface of the floatation surface so as to correct the correction target based on the correction amount and a shape changing relationship of the floatation surface among the angle and the crown, the camber, and the twist; judging whether a shape change of the parameter other than the correction target falls within the permissible range based on the shape changing relationship if the laser is irradiated at the angle onto the rear surface of the floatation surface; changing the angle to another angle having a similar effect based on the shape changing relationship when said judging step determines that the parameter other than the correction target falls outside the permissible range; and regulating a shape of the floatation surface by linearly irradiating the laser at one of the angle or the other angle onto the rear surface of the floatation surface, wherein where an orthogonal coordinate system having first and second coordinate axes is set on the floatation surface of the head, the first coordinate axis being aligned with a width or traverse direction of the head, the second coordinate axis being aligned with a longitudinal direction of the head, a center of the floatation surface is set as an origin of the orthogonal coordinate system, the angle or the other angle being an angle between the second coordinate axis and a linearly irradiated laser that passes the origin, and the linearly irradiated laser being inclined with respect to the second coordinate axis.