Extremely high bit density recording with single-pole perpendicular head

Nanocomposite CoPt:C films for extremely high-density recording

Low-Resistance Spin-Dependent Tunnel Junctions With HfAlOx Barriers for High-Density Recording-Head Application

Spin-dependent tunnel junctions with the structure (Ta 70 Å/NiFe 70 Å/MnIr 80 Å/CoFe 35 Å/HfAlO /CoFe 35 Å/NiFe 40 Å/TiW(N) 150 Å) were fabricated on top of 600-Å-thick ion-beam-smoothed low-resistance Al electrodes. HfAlO barriers were formed by natural oxidation (5 min at 1 torr in pure O2) of 5-Å-thick (2-Å Hf + 3-Å Al) films or 6-Å-thick (2-Å Hf + 4-Å Al) films. Resistance area (R A) produc...

Target and Equalizer Design for High-Density Bit-Patterned Media Recording

In bit-patterned media recording (BPMR) channels, the inter-track interference (ITI) is extremely severe at ultra high areal densities, which significantly degrades the system performance. The partial-response maximum-likelihood (PRML) technique that uses an one-dimensional (1D) partial response target might not be able to cope with this severe ITI, especially in the presence of media noise and...

Large-scale Recording from Axonal Arbors of Single Neurons with Cmos Based High-density Microelectrode Arrays

We report on the identification and tracking of the electrical activity of processes of single neurons. With a newly designed complementary metal-oxide-semiconductor (CMOS) based integrated highdensity microelectrode array (HD-MEA) [1,2], we were able to simultaneously use more than 1000 electrodes and low-noise readout channels to monitor electrophysiological signals of many individual branche...

Magnetic Layers for Perpendicular Recording Media

Hard disk drives (HDDs) are recently being incorporated into video recorders, car navigation devices, family game machines, etc., as devices (AV-HDDs) to store digital AV (audio-visual) information such as movies and television programs. Because the AV-HDD has the features of large capacity, high speed and low cost, it is suitable for long-time recording, high-speed random access and multi-chan...