Transducing head having a reduced thermal pole tip recession

A magnetic head having an air bearing surface and comprising:

• a substrate;
• a basecoat positioned upon the substrates;
• a data transducer positioned upon the basecoat adjacent the air bearing surface, the data transducer comprising a plurality of metallic layers;
• and
• a plurality of insulating layers positioned upon the basecoat adjacent the data transducer opposite the air bearing surface of the data transducer, wherein at least one insulating layer of the plurality of insulating layers is substantially coplanar to at least one of the plurality of metallic layers, and wherein a portion of the at least one insulating layer of the plurality of insulating layers is formed of a first layer and a second layer positioned upon the first layer, wherein the first layer is formed of a material having a coefficient of thermal expansion less than a coefficient of thermal expansion of the material forming the substrate.

A data transducer fabricated on a substrate and comprising a composite layer, the composite layer comprising:

• an underlayer;
• a metallic layer positioned upon the underlayer, the metallic layer being patterned to leave portions of the underlayer exposed;
• a first insulating layer positioned upon exposed portions of the underlayer, the first insulating layer having a thickness less than a thickness of the metallic layer and a coefficient of thermal expansion less than a coefficient of thermal expansion of the substrate;
• and
• a second insulating layer deposited upon the first insulating layer, the second insulating layer having a top surface substantially coplanar with a top surface of the metallic layer.