"TOKYO, Oct. 15, 2007 – Hitachi, Ltd. (NYSE: HIT / TSE: 6501) and Hitachi Global Storage Technologies (Hitachi GST) announced today they have developed the world’s smallest read-head technology for hard disk drives, which is expected to quadruple current storage capacity limits to four terabytes (TB) on a desktop hard drive and one TB on a notebook hard drive"

This new "current perpendicular-to-the-plane giant magnetoresistive" (CPP-GMR) technology wants to replace existing head technology, called TMR (tunnel-magnetoresistive), between 2009 and 2011. Products shipping in 2009 will have recording heads with 50nm track widths and will reach 30nm track widths in 2011 (current ones have track widths of 70nm). Their researchers have already reduced existing recording heads to less than a half.

CPP-GMR will allow recording densities between 500 gigabits and one terabit per square inch. Compared to the 200 gigabits we see today, that's more than quadrupling density.

Link: Hitachi.

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