and the beyond BD -Introduction of large capacity optical disc- - PowerPoint PPT Presentation

and the beyond BD -Introduction of large capacity optical disc- Takeshi Miki / Sony Corporation 16 March 2011 at MEDIA-TECH

Agenda 1. Back ground 2. Physical specifications for BDXL TM 3. Usage of BDXL TM 4. Future extension

1: Back Ground

～ on BDXL TM ～ Back ground Capacity/Disc TM 100~128GB standardization necessary File-based editing Real tapeless process Movie 25~50GB triple/quadruple Broadcasting Medical Data Center dual single 2000 2005 2010 delivery year

2: Physical specifications for BDXL TM means triple and quadruple layer Blu-ray Disc TM whose capacity are 100GB and 128GB, respectively.

Brief physical specifications of all BD discs BDXL™ license has started on June 11, 2010.  Enhanced layer capacity with just decreasing minimum mark length while keeping the same specifications of physical layer as SL/DL.  As legacy devices for BD- RE/R SL/DL do not support BDXL™ discs, new Indication Logo was defined to avoid user confusion. Layer SL DL TL QL Disc type R, RE or ROM R or RE R Capacity 25 GB 50 GB 100 GB 128 GB Capacity/layer 25 GB 34 GB 32 GB Minimum Mark length 0.149 m 0.112 m 0.117 m Track Pitch 0.32 m Modulation 17PP ECC LDC with BIS Sector/Block Size 2 kB / 64 kB Track Path - Opposite track path Write speed for Media RE: 1x*, 2x RE: 2x R: 2x, 4x (except ROM) R: 1x. 2x. 4x(Opt.), 6x(Opt.) R: 2x, 4x 1x* = 36 Mbps

Requirements for signal quality  New index for signal quality as i-MLSE based on PR technology is introduced for BDXL™ , compared to Limit-Equalizer jitter for SL/DL  A disc is required to have the same Random Symbol Error Rate (R-SER) both for SL/DL and BDXL™.  A drive is required to have R-SER criteria specified in Drive Test Spec. using an authorized Test disc. Layer SL DL TL QL Disc type R, RE or ROM R or RE R Capacity 25 GB 50 GB 100 GB 128 GB Limit-Equalizer jitter i-MLSE* using PR(1,2,2,2,1) L0: 7.0 % Signal Quality Evaluation L0: 11.0 % 6.5 % L0: 11.0 % L0: 7.0 % Index required for disc L1: 11.0 % (without 2T edges) L1: 11.5 % 6.5 % with Tester L1: 8.5 % L2: 11.5 % L2: 12.0 % (without 2T edges) 6.5 % L3: 12.0 % (without 2T edges) R-SER required for disc 2.0E-4 (defined in Part1 Specifications) with a Tester R-SER required for drive 1.0E-3 (Criteria in Drive Test Specifications.) with a Test disc i-MLSE*: integrated Maximum Likelihood Sequence error Estimation

Structure of BDXL TM Target value for quadruple layer 1. Cover & spacer structure 2. Recording layer characteristics thickness transmittance/reflectivity 100um Cover thickness 50~55um Cover L3 ≒ 80%/2% Layer3 Layer2 S3 L2 ≒ 70%/3% Spacer thickness Layer1 S2 L1 ≒ 60%/8% 10~20um S1 Layer0 L0 ≒ ---/20% Variation 2.5um BDXL TM quadruple Layer

Minimum thickness of spacer Optical Crosstalk Thickness of Spacer Layers shall be more than 10 µm. Bit error rate dependence of Space Layer thickness Min. ~10um L0 L1 L2 L3

Difference in the thickness of spacer Optical inter-layer interference Differences in thickness among Spacer Layers shall be more than 1µm. Influence of optical path difference between the signal light and three- times-reflected signal light on readout signal. Readout Signal RF voltage (V ) S1 - S2 ( µ m) m) ± 1 µ m Thickness difference Position