Thin-film magnetic head, head gimbal assembly, magnetic disk drive apparatus, method for designing and manufacturing thin-film magnetic head

A thin-film magnetic head includes at least one inductive write head element and at least one read magnetic head element, capable of controlling a spacing between a magnetic recording medium and the at least one magnetic read head element by heating. A gain SG (nm/° C.) of the spacing is greater tha...

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Bibliographic Details
Main Authors OTA KENWA, INAGE KENJI, OIKE TARO
Format Patent
LanguageChinese
English
Published 18.02.2009
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:A thin-film magnetic head includes at least one inductive write head element and at least one read magnetic head element, capable of controlling a spacing between a magnetic recording medium and the at least one magnetic read head element by heating. A gain SG (nm/° C.) of the spacing is greater than a spacing gain threshold SGTHLD (nm/° C.) defined by the following expression: SGLIMT=A*dPTP+B A=1.4642E-02*exp(-6.6769E-05*LRDMF) B=4.9602E-01*exp(-2.0423E-03*LRDMF) where dPTP represents an amount of change in protrusion (nm) of a top end of the at least one inductive write head element and/or the at least one read magnetic head element by heating, and LRDMF represents a line recording density (kFCI) at a frequency half of the maximum recording frequency.
Bibliography:Application Number: CN200510070265