Magnetoresistive transducer, magnetic head, head gimbal assembly and hard disc drive

Abstract

The invention discloses a magnetoresistive transducer. The magnetoresistive transducer comprises a first shielding layer, a second shielding layer, a magnetoresistive element, a pair of hard magnetic layers and a non-magnetic insulation layer, wherein the magnetoresistive element is arranged between the first shielding layer and the second shielding layer and the hard magnetic layers are respectively placed at two sides of the magnetoresistive element; the non-magnetic insulation layer is formed at one side, which is far way from an air bearing surface of a magnetic head, of the magnetoresistive element; the magnetoresistive transducer further comprises a first non-magnetic conduction layer which is arranged between the first shielding layer and the magnetoresistive element and the first non-magnetic conduction layer is embedded into the first shielding layer so as to be separated from the air bearing surface. The magnetoresistive transducer provided by the invention is provided with a narrower read gap so that the resolution capability is enhanced and the reading performance is improved; and meanwhile, the magnetoresistive transducer has a stronger longitudinal bias magnetic field, so that the self-stability is maintained, the total sensing area is enlarged and the reliability of the transducer is further improved.

Description

technical field [0001] The present invention relates to an information recording disk drive unit, in particular to a magnetoresistive (MR) sensor, a magnetic head, a head gimbal assembly (HGA) and a hard disk drive. Background technique [0002] A hard disk drive containing multiple spinning platters is commonly used to store data on magnetic media on its platter surfaces, while a movable head containing a read sensor is used to read data from the magnetic tracks on the platter surfaces. [0003] At present, the read sensor adopts the MR sensor, which has the ability to read data from the surface of the disk with a larger magnetic track and linear density than the thin film inductive head, so it has become the mainstream read sensor. [0004] Currently, one after another, different types of MR sensors have been effectively put into use by disk drive developers. One of the traditional MR sensors is anisotropic magnetoresistive (AMR), which changes the angle between the magne...

AI Technical Summary

Problems solved by technology

More specifically, a wider read gap cannot identify and detect a narrower line density, in other words, a wide read gap reduces the read resolution of the MR sensor, which will affect the signal-to-noise ratio and even affect the accuracy of reading data from the disk. performance

the above figure 2 Although the MR sensor can prevent the shunting of the signal field and the longitudinal bias field to improve the performance, but because of the widening of the read gap due to the addition of two non-magnetic conductive layers 712, 715, it brings low resolution and subsequent problems

Images