Advances in Tribology / 2013 / Article / Tab 2

Review Article

The Head-Disk Interface Roadmap to an Areal Density of Tbit/in2

Table 2

HMS breakdown scenarios for 4 Tb/in2.

HMS Budget 1 Tb/in² 4 Tb/in²HMS adder
ComponentsINSIC 2010Target HMS by ~2014 INSIC 2010Target HMS by ~2020-21 (effect of HAMR, BPM)
ComponentHiLoMedium riskHigh riskBPMHAMR

TDH 1.82.01.01.41.10.60.30.5
Disc overcoat 0.92.52.00.61.81.50.30.6
Disk lubricant 0.91.21.00.81.00.8
Clearance1.31.21.00.60.60.50.20.3
Head overcoat 1.02.01.50.71.10.9

Total5.88.96.54.05.64.30.81.4

The HMS adder columns corresponding to HAMR and BPM will be discussed in Section 4.