Head structure with electric damage protection for a microwave-assisted hard disk drive

摘要

Embodiments disclosed herein generally relate to the data storage field and hard disk drives (HDD) using microwave assisted magnetic recording (MAMR) technology. Aspects of the preferred embodiments are to prevent the breakdown of spin torque oscillators (STO) due to large amounts of current flowing through the STO during head/disk contact. A magnetic head slider is disposed above and spaced apart from a disk. A STO is formed on a section of the magnetic head slider. Two electrodes are coupled to the STO, and one electrode has a higher potential than the other electrode. A preamplifier is adapted to send a current through the two electrodes, resulting in the higher potential electrode protruding closer to the disk than the lower potential electrode. Current then flows from one electrode to the disk without flowing through the STO, and breakdown of the STO is prevented.

主权项

1. A magnetic head slider, comprising;
a spin torque oscillator; a first spin torque oscillator electrode coupled to the spin torque oscillator; a second spin torque oscillator electrode coupled to the spin torque oscillator such that the spin torque oscillator is disposed between the first spin torque oscillator electrode and the second spin torque oscillator electrode, and wherein the first spin torque oscillator electrode has a higher potential than the second spin torque oscillator electrode; and a preamplifier coupled to the first spin torque oscillator electrode and the second spin torque oscillator electrode, wherein the preamplifier is adapted to send a current through the first spin torque oscillator electrode, and wherein the first spin torque oscillator electrode is positioned closer to a surface of a disk than both the second spin torque oscillator electrode and the spin torque oscillator.