Recording technologies for terabit per square inch systems

Ionic Liquid Lubricant with Ammonium Salts for Magnetic Media

“…The physical spacing between the magnetic sensors and the disk is down to almost 10 nm in recent systems, and it will be necessary to be within 5-7 nm for areal densities in the Tbin -2 range. (Wood et al,2002) The read/write magnetic heads are mounted in the slider and travel across the data zone during the reading and writing operations. Fig.…”

Three-Dimensional Magnetic Recording Device

“…It is assumed that there are two sources of the electronics noise: 10 Ohm GMR sensor and 0.2 nV/sqrt(Hz) preamp noise over a 500 MIHz CTF bandwidth at 1 Gigabit/sec data rate. It is believed that the most advanced encoding software channels (e.g., turbo) could reduce the bit error rate (BER) to 10-9 even for a 10 dB SNR recording system [25]. Even with such advanced encoding, only four to five layers could be distinguished in such a trivial implementation of 3-D recording.…”

A Study on the Efficacy of Flow Mitigation Devices in Hard Disk Drives

“…Densities in excess of 100 Gb/in have been demonstrated and it is widely projected that conventional technology will ultimately achieve 1 Tb/in . It is foreseeable that at such areal densities, a track density of 0.5 million tracks/inch will be required, with each recorded bit being roughly 13 50 nm [1]. Under such conditions, the tracking accuracy required is approximately 1.5 nm root mean square (RMS).…”