More than 1 Tbit/in2 magnetic recording

Dr. D. Niarchos

Director of Research NCSR

“Demokritos” Athens, Greece

e-mail:dniarchos@ims.demokritos.gr

www.teramagstor.eu

WAPRO-9-12 JUNE 2012

CURRENT NEEDS

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FUTURE NEEDS

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SYMPOSIUM 9-9-2010 WAPRO-9-12 JUNE 2012

167 Million HDDs for 88 Exabytes Shipped in 4Q10 !!!!

TrendFocus, Inc

SYMPOSIUM 9-9-2010 WAPRO-9-12 JUNE 2012

Longitudinal vs perpendicular recording

Max ~ 200 Gbits/in2 Max ~ 2-3 Tbits/in2

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TOMORROW’S SITUATION

ICMM-KOLKATA-2010

WAPRO-9-12 JUNE 2012

WAPRO-9-12 JUNE 2012

SYMPOSIUM 9-9-2010

MEDIA DESIGN CONSTRAINT-TRILEMMA

ICMM-KOLKATA-2010

SYMPOSIUM 9-9-2010

OVERCOMING THE SUPERPARAMAGNETIC LIMIT

SYMPOSIUM 9-9-2010

Unpublished Data-TERAMAGSTOR

SYMPOSIUM 9-9-2010

MEDIA DESIGN CONSTRAINT-TRILEMMA

ICMM-KOLKATA-2010

Help from Nanophotonics!!

For heating a 50 nm dot a few hundred degrees you need 50 mW laser For reasonable lasers (10-100 mW) you require efficiencies of 10 % at least

SYMPOSIUM 9-9-2010

MEDIA DESIGN CONSTRAINT-TRILEMMA

ICMM-KOLKATA-2010

So, is there life after 10 (or 20,30 ) Tb/in2 ?

•  There are clearly limits to conventional HDD technology somewhere in the 1-5 Tbit/in2 regime, but there are multiple paths forward to around 10 Tbit/in2

• Can we imagine making 4 nm period bits to achieve 40 Tbits/in2 ?

• Density of 2-dimensional storage of all forms (magnetic and semiconductors is approaching limits

• A 3-D technology breakthrough would seem to be required thereafter… , but there is nothing in the horizon(?)

• DNA-recording would be the ultimate limit of Multi-Multi-TB/in2

LEARNING FROM SEMICONDUCTORS

2-D Transistor

3-D Transistor

TOWARDS Multilevel OPTICAL RECORDING-3D

OPTICAL RECORDING: FROM CD TO Blue-RAY

3-D Magnetic Recording

The development of 3-D magnetic recording is divided into two phases:

1.  Multi-level Recording: not optimally utilized 3-D space

Note: Effective areal density increase is by a factor of Log2L (where L is the number of signal levels)

2.  3-D Recording: each magnetic layer is separately addressed

Note: Effective areal density increase is by a factor of N (where N is the number of recording layers)

Note: Each cell is 50 x 50 nm2

Note: These are not active layers

The ultimate density!! >50 Tb/in2 DNA-RECORDING

1 Tbit/in2

10 Tbit/in2

50 Tbit/in2

200 Gbit/in2

1. Perpendicular Recording a. Use smaller Grains&Deal with Write Field

Problem (~10x gain) b. Heat Assisted Magnetic Recording +

Nanophotonics (HAMR) e.g. high anisotropy 3 nm FePt grains 2. Single Grain per Bit Recording combined with

HAMR (~5x gain) –  Patterned Media 4. 3-D Magnetic Recording (Nanophotonics) 5. Protein-based Memory (Single-Molecule

Recording)

End to Longitudinal Recording

COSTAS

HAPPY BIRTHDAY

ΧΑΡΟΥΜΕΝ

Α ΓΕΝΕΘΛΙΑ

Dimitris