Slider with high frequency voltage ground and low frequency dc voltage isolation

A slider, comprising:

• a substrate;
• a magnetic head;
• and
• a coupling capacitor configured to AC couple an electronics ground of the slider to the substrate and DC decouple the electronics ground of the slider from the substrate,
• wherein the coupling capacitor comprises:
• a first conductive layer positioned above the substrate;
• a gap layer positioned above the first conductive layer;
• a dielectric layer positioned above the gap layer and the first conductive layer;
• and
• a second conductive layer positioned above the dielectric layer.

A magnetic data storage system, comprising:

• at least one slider, comprising:
• a substrate;
• a magnetic head;
• and
• a coupling capacitor configured to AC couple an electronics ground of the slider to the substrate and DC decouple the electronics ground of the slider from the substrate;
• a magnetic medium;
• a drive mechanism for passing the magnetic medium over the at least one slider;
• and
• a controller electrically coupled to the at least one slider for controlling operation of the magnetic head therein, wherein the controller is configured to apply a negative bias to the at least one slider to reduce accumulation of contaminants on the at least one slider during use thereof.