Importance

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Abstract

A magnetic transducer with selected elements recessed from the surface of the transducer is disclosed. The magnetic sensor element is recessed below its surrounding gap material and the second shield (S2) is preferably recessed below the level of the gap material. Recessing the selected elements below the surrounding ceramic material, results in superior resistance to physical distortion resulting from the action of the moving magnetic media. Applicant discloses two methods for producing magnetic transducers with recessed elements according to the invention. One method uses a lapping medium which chemically etches the selected material more aggressively than the surrounding material resulting in the selected material being recessed from the surface of the transducer. For transducers in which the magnetic sensor element and the second (S2) are made from alloys of nickel and iron, an acidic lapping medium is preferred to achieve the desired structure. A second method for fabricating the transducer structure according to the invention uses sputter-etching.

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First Claim