System for adjusting lapping of a transducer using a disk windage
View Patent ↗A system for providing transducer(s) including a disk structure and having an air-bearing surface (ABS) are described. The disk structure resides a distance from the ABS and has a disk dimension substantially perpendicular to the ABS. Lapping control and disk windage ELGs are provided. The lapping control ELG has first and second edges first and second distances from the ABS. The disk windage ELG has edges different distances from the ABS. A difference between these edges corresponds to the disk dimension. A windage resistance of the disk windage ELG is measured and a disk windage determined. The disk windage corresponds to a difference between designed and actual disk dimensions perpendicular to the ABS. A lapping ELG target resistance is determined based on the disk windage. The transducer is lapped. Lapping is terminated based on a resistance of the lapping control ELG and the lapping ELG target resistance.
1. A slider comprising:
at least one transducer including a disk structure and having an air-bearing surface (ABS), the disk structure residing a distance from the ABS and having a disk dimension substantially perpendicular to the ABS;
a lapping control electronic lapping guide (ELG) having a first edge a first distance from the ABS and a second edge a second distance from the ABS; and
a disk windage ELG having a third edge a third distance from the ABS and a fourth edge a fourth distance from the ABS, a difference between the third edge and the fourth edge corresponding to the disk dimension.
2. The slider of claim 1 wherein the disk structure is a disk of a near-field transducer.
3. The slider of claim 1 wherein the lapping control ELG has a first track width and the disk windage ELG has a second track width substantially equal to the first track width.
4. The slider of claim 1 wherein the lapping control ELG is coupled with a first plurality of leads having a first leads resistance and the disk windage ELG is coupled with a second plurality of leads having a second leads resistance, the first leads resistance being substantially equal to the second leads resistance.
5. The slider of claim 4 wherein the first plurality of leads and the second plurality of leads include a common ground lead.
6. The slider of claim 1 wherein the lapping control ELG and the disk windage ELG are formed from a single resistive sheet.
7. The slider of claim 1 wherein the fourth distance is substantially equal to the second distance.
8. The slider of claim 1 wherein the third distance of the disk windage ELG from the ABS is equal the distance the disk structure is recessed from the ABS.
9. The slider of claim 1 wherein the difference between the third edge and the fourth edge is equal to the disk dimension.