The Head-Disk Interface Roadmap to an Areal Density of <svg     style="vertical-align:-0.0pt;width:14.625px;" id="M1" height="14.2875" version="1.1" viewBox="0 0 14.625 14.2875" width="14.625"  xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg">
	
		
			<g transform="matrix(.022,-0,0,-.022,.062,14.225)"><path id="x34" d="M456 178h-96v-72q0 -51 12.5 -62.5t72.5 -16.5v-27h-256v27q65 5 78 17t13 62v72h-260v28q182 271 300 426h40v-407h96v-47zM280 225v295h-2q-107 -148 -196 -295h198z" /></g>

		
	
</svg>Tbit/in<sup  ><b>2</b></sup>

<table>Historical variations of HMS versus areal density from [<a href="/journals/at/2013/521086/#B6">6</a>]. The yellow star is an extrapolation to 4 Tb/in<sup>2</sup>.</table>

Advances in Tribology

fig2

Figure 2

Figure 2: The Head-Disk Interface Roadmap to an Areal Density of <svg     style="vertical-align:-0.0pt;width:14.625px;" id="M1" height="14.2875" version="1.1" viewBox="0 0 14.625 14.2875" width="14.625"  xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg">
	
		
			<g transform="matrix(.022,-0,0,-.022,.062,14.225)"><path id="x34" d="M456 178h-96v-72q0 -51 12.5 -62.5t72.5 -16.5v-27h-256v27q65 5 78 17t13 62v72h-260v28q182 271 300 426h40v-407h96v-47zM280 225v295h-2q-107 -148 -196 -295h198z" /></g>

		
	
</svg>Tbit/in<sup  ><b>2</b></sup> 

Advances in Tribology

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

Figure 2

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