MAGNETIC SENSOR HAVING HARD BIAS STRUCTURE FOR OPTIMIZED HARD BIAS FIELD AND HARD BIAS COERCIVITY

PROBLEM TO BE SOLVED: To provide a magnetic read sensor having a hard bias structure that extends beyond the back edge of a sensor stack by a controlled distance that is chosen to maximize both hard bias field and hard bias coercivity and anisotropy.SOLUTION: A hard bias structure 332, 334 has a bac...

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Bibliographic Details
Main Authors AHN YONGCHUL, QUANG LE, LIU GUANGLI, SIMON H LIAO, DAVID J SEAGLE
Format Patent
LanguageEnglish
Published 08.07.2013
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To provide a magnetic read sensor having a hard bias structure that extends beyond the back edge of a sensor stack by a controlled distance that is chosen to maximize both hard bias field and hard bias coercivity and anisotropy.SOLUTION: A hard bias structure 332, 334 has a back edge that is well defined and that has a square corner at its innermost end adjacent to a sensor stack 302. The magnetic sensor can be constructed by a process that includes separate masking and milling processes that are dedicated to defining the back edge of the hard bias structure.
Bibliography:Application Number: JP20120279517