Patent ID: 7876309

Claim:
An apparatus, comprising: a first conductive trace of a slider having at least one sub-trace; a second conductive trace of the slider having at least one sub-trace, wherein at least one sub-trace of the first conductive trace is interleaved with at least one sub-trace of the second conductive trace, each sub-trace of the first and second conductive traces having a variable width from a first end to a second end of the slider; and a processing device coupled with the slider, wherein the processing device is configured to calculate a centroid position P cen , with P cen =d 2 /(d 1 +d 2 )×N res , wherein d 1 is a capacitance variation of the first conductive trace, d 2 is a capacitance variation of the second conductive trace, and N res is a resolution of the slider.