Patent ID: 6747841
Filing Date: 2004-06-08
Classification: B82Y,G11B

Abstract:
A magnetic data storage and retrieval system comprising:a magnetic head having an air bearing surface and a height measured substantially normal to the air bearing surface, the magnetic head having a substrate and a data transducer positioned upon the substrate, the data transducer comprising at least one metallic layer formed of a material having a coefficient of thermal expansion greater than a coefficient of thermal expansion of a material forming the substrate; and a composite overcoat layer positioned upon the data transducer on a side of the data transducer opposite the substrate, the overcoat layer being a single layer patterned from a first material and a second material such that blocks of the first and second materials alternate along the height of the magnetic head, the first material having a coefficient of thermal expansion substantially equal to or greater than a coefficient of thermal expansion of the material forming the substrate and the second material having a coefficient of thermal expansion less than the coefficient of thermal expansion of the material forming the substrate.