Panasonic AVC Yasumori Hino
Sony Semiconductor Solutions Jun Nakano

Backgrounds
 Dara Center Issues
 Advantages of Optical Discs Technology Road Map300GB
 Disc Structure, Data Transfer Rates, and Media Reliability
Future Technologies
 500GB and 1TB Technologies
Conclusion
OCP Japan meet-up 2016 Panasonic/Sony

2016/6/23

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Global Environmental
Problems

More POWER CO2 Emission

No Idea, No Solution

OCP Japan meet-up 2016 Panasonic/Sony

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Backward compatibility⇒No data migration required.
Wide tolerance of operation and storage
conditions⇒Ecological and economical data centers
Highly reliable and long life recording media

OCP Japan meet-up 2016 Panasonic/Sony

2016/6/23

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Archival disc roadmap
Disc Structure

3 Layers / side
Both sided disct0.5mmSubstrate

t0.5mmSubstrate

Cover layer
Coverlayer

BD

Track Layout

Archival Disc keeps the same
disc structure and material forthree generations

Cover layer

100GB

Track Density
320nm/Track

Liner Density
83.8 nm/bit

AD1 300GB

AD2

Track Density
225nm (1.42Tims)
Crosstalk cancel technology

1.05Tims
79.8nm/bit

500GB

AD31TB

Keep same track density

1.75Tims
47.9nm/bit
Intersymbol interference
cancel technology
OCP Japan meet-up 2016 Panasonic/Sony

2.0Tims
23.9nm/bit
Multilevel recording
technology
2016/6/23

5Larger Capacity and Lower Bit Cost
 Land & Groove format over all generations
 Simple recording layer structure
300GB/disc , 1TB/disc in the future

Higher data transfer rate Double-sided recording
90MB/s by 2 optical heads, 360MB/s in the future

Higher reliability for protecting important data
 Stable oxide materials
Over 50year lifetime and robustness against disasters

OCP Japan meet-up 2016 Panasonic/Sony

2016/6/23

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Land & Groove format
Will adopt the format
over all generations

 Cross-talk cancellation technology
 Track-pitch: 225nm

Track Pitch 320nm

GrooveLandGroove

LandGroove

Blu-ray ™ format
83.81nmGroove Recording Data bit length

Track Pitch 225nm

GrooveLandGroove

LandGroove

Archival Disc format
79.46nmLand & Groove Recording Data bit length

OCP Japan meet-up 2016 Panasonic/Sony

2016/6/23

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Key technologies
 Simultaneous recording on both sides
 Newly developed LSI with advanced signal processor

 Realizes 45MBps/HeadDouble side

OCP Japan meet-up 2016 Panasonic/Sony

2016/6/23

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New recording material
 Triple stacking of oxide materials
Protective Film
Cover layer

t0.5mmSubstrateVery stable oxide recording material
Cover layer
UV lacquer
Dielectric film

t0.5mmSubstrate

Cover layerlayer
CoverRecording film
Space layer
UV lacquer

Dielectric film

Protective Film

OCP Japan meet-up 2016 Panasonic/Sony

2016/6/23

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New recording material
 No degradation observed under HT/HH condition
50℃

25℃

1000Year

50YearOCP Japan meet-up 2016 Panasonic/Sony

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ECC
Higher Reliability by 4 times longer ECC

500GB ADECC Cluster
295Bytes
PI 5Bytes

HDD
LTO-6
LTO-7

982
500GBAD300GB
ADPO

AD 500GB: 1 uncorrectable error bitin >1020 read bits76256kB User Data
Code Rate = 91%

OCP Japan meet-up 2016 Panasonic/Sony

2016/6/23

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500GB = 300GB x 1.667
Archival Disc

300GB

500GB

Linear Density

Key Technology

1.000xLand/Groove Recording

Rec. Dens.

1.551xHigher Order PRML

FormatEfficiency

1.075xHigher Efficiency ECC

Track Dens.
Lin.
Dens.

Track
Density

Capacity
Expansion

Total

1.667xEffect of higher format efficiency
300GB Transfer rate
(87.2MB/s Av.)

500GB Transfer rate
(96.6MB/s Av.)
Transfer rate enhancementby higher format efficiency

OCP Japan meet-up 2016 Panasonic/Sony

2016/6/23

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System margins of 500GB
Confirmed that all margins are wide enough.
AD-500GB

Land

Disc Tilt（Radial dir.）±0.38°

Objective Lens

AD-300GB

Groove±0.3°

Disc Tilt

Groove±0.35°
Radial tilt tolerance

Disc Tilt（Tangential dir.） ±0.49°±0.47°±0.60°

Focus Error±223nm±223nm±200nm1.E-01

Cover Thickness Error±4.2um

±4.1um

±6.0um1.E-02

1.E+00GrooveLand

1.E-03-0.6-0.4

1.E-04
-0.2
00.2

0.4

0.6

tilt angle [deg.]

OCP Japan meet-up 2016 Panasonic/Sony

2016/6/23

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The current optical disc technology use only the light intensity
difference for the read-out. The next generation optical disc use thelight phase difference to improve the SNR read-out.
Optical head can realize the significant
improvement for the detection SNR byusing the optical phase detection method.
Experimental result
Detection
methodIntensity
detection

Phase
detection

SNR

34dB

46dB

12dB up

12dB = 4 times capacity
HDD was realized the significant growth by
GMR/TMR Head that was the breakthroughfor the SNR limit.
OCP Japan meet-up 2016 Panasonic/Sony

2016/6/23

16PanasonicとSonyは、Blu-rayの3倍容量のArchival Discを共同開発し、2015年に規格化を完了した
このArchival Discは、様々な環境において長期信頼性を発揮し、データセンターの直面する課題解決に貢献できる
Archival Disc 500GBは、現時点で十分なシステムマージンを有し、規格化完了は目前となっている
Archival Disc 1TBは、光の新たな自由度を利用することにより実現可能である

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