more than 1 tbit/in magnetic...
TRANSCRIPT
More than 1 Tbit/in2 magnetic recording
Dr. D. Niarchos
Director of Research NCSR
“Demokritos” Athens, Greece
e-mail:[email protected]
www.teramagstor.eu
WAPRO-9-12 JUNE 2012
CURRENT NEEDS
WAPRO-9-12 JUNE 2012
FUTURE NEEDS
WAPRO-9-12 JUNE 2012
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
WAPRO-9-12 JUNE 2012
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Unpublished Data-TERAMAGSTOR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