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| October 24, 2001 |
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New DVD Technology for PC Data to be Launched
Conforms with DVD+RW Standard |
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Mitsubishi Chemical Media Co. Ltd.
Mitsubishi Chemical Corporation |
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(Tokyo) - Mitsubishi Chemical Media Co.,Ltd(President : Yoshimitsu Kobayashi)
announced today it will launch new DVD technology that conforms to the DVD+RW
standard in early November. The new technology will improve both the recording
and storage features of DVD disks.
The DVD+RW standard was developed by the "DVD+RW Alliance*," a group of companies
that played a leading role in standardizing the CD-R/RW. The new DVD+RW technology
is a directly descended from the CD-R/RW technology, which was developed with
compatibility being the most important feature. Mitsubishi Chemical Media has
now established a rewritable-type DVD standard that is compatible with DVD-ROM
drives and DVD-Video players.
DVD players have become very popular with consumers and people are now able to
readily enjoy high-quality image and sound at home. As a result of this trend,
demand for rewritable-type DVD has also been increasing annually, and it is expected
that the market will further expand with the introduction of software that enables
easy editing and recording of video images. It will become increasingly important
that DVD disks not only have compatibility after recording but also have recording
features and storage stability.
Mitsubishi Chemical Media is actively involved in the development of highly reliable
recording materials for CD and DVD platforms. In the soon-to-be-launched DVD+RW
disk, the company will introduce its super Eutectic Recording Layer (SERL) technology,
which optimizes high-speed entry and recording characteristics. With this technology,
the company has perfected stable entry by means of high-quality digital recording,
as well as high storage stability. In addition, by conformity with the lossless
linking technology that is part of the DVD+RW standard, the new disk will aintain
its compatibility even after adding new data to the disk.
Date of launch: In the first 10 days of November 2001 (planned)
Product name: DVD+RW Disk for PC Data
| Product name |
Product No. |
Product outline |
Desiredretail
price |
Case spec. |
| DVD+RW |
DPW47U1 |
4.7GB DVD+RW disk for
PC data one-piece package |
Open |
Jewel case |
| DVD+RW |
DPW47U5 |
4.7GB DVD+RW disk for
PC data five-piece package |
Open |
Jewel case |
* DVD+RW Alliance companies are: Sony Corporation; Dell Computer of the US; Thompson
Multimedia of France; Hewlett Packard of the US; Philips Electronics of the Netherlands;
Yamaha Corporation.; Ricoh Company,Ltd.; and Mitsubishi Chemical Corporation.
Special Features of DPW47U1 (conforms with DVD+RW standard)
| New technology SERL (super Eutectic Recording
Layer), which was developed by Mitsubishi Chemical Media Co. has been adopted |
| |
| 1. |
Highly reliable disk with repeated recording and play back |
| |
The independently developed recording layer SERL - which has
been introduced to our DVD-RW and high speed-compatible CD-RW - is a recording
material that crystallizes around the pit as opposed to centering on the crystal
core as in traditional recording material. The SERL forms a quick and neat recording
mark, facilitating the high-speed entry. Because it does not have a rough and
bulky crystal core, the new technology does not promote crystallization due to
external factors and maintains long and stable recording conditions, even after
entry. Mitsubishi Chemical Media's highly reliable DVD+RW disk enable repeated
recording and play back, and is also suitable for long-term storage. |
| |
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| 2. |
Corresponds to 2.4 times faster high-speed entry |
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Using the recording material SERL technology, Mitsubishi Chemical
Media's new disk corresponds to the high-speed entry of 2.4 times. It also corresponds
to the DVD+RW standard "background format,*" which significantly shortens the
formatting time. These features make the disk capable of storing 4.7GB of data. |
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| Lossless linking technology |
| |
In DVD-ROMs and DVD-Video used exclusively for playback
functions, continuous data are recorded without any opening. Unless data are recorded
without any opening in recordable DVDs, a DVD player will not be able to read
the data. The lossless linking technology enables additional data entries with
a high level of precision - less than 1 micron for nearly seamless recording.
This function is aided by the accurate positioning of the high-frequency wobble
that is prescribed in the DVD+RW standard. It maintains a high level of compatiblity
with existing DVD-Video players and DVD-ROM drives. |
* The background format is a function that enables the format the portion of the
disk necessary for entry and immediate use after entry. The remaining unformatted
portion of the disk will automatically format gradually during use.
This feature eliminates
the need to wait for the entire disk to be formatted prior to use. High-frequency
wobble - A pit for recording that [menders - don't know what this word means]
in size at about 5.8 times the CD precision level
For some DVD-ROM
drives and DVD-Video players, there may be data that cannot be read.
DVD+RW Disc Specifications
| Items |
|
Unit |
|
| Capacity |
Nominal Capacity |
GB |
4.7 |
Optical Beam
Wavelength |
for Writing |
nm |
650 -
665 |
| for Reading |
nm |
645 -
660 |
Dimensional
Characteristics |
Overall Diameter |
mm |
120.0
+-0.3 |
| Center Hole Diameter |
mm |
15.0
+ 0.15 /-0.00 |
| Disc Thickness |
mm |
1.20
+ 0.30 / -0.06 |
Mechanical
Characteristics |
Angular Deviation
(Radial Direction) |
deg.
|
<=0.70
|
Angular Deviation
(Tangential Direction) |
deg
|
<=0.30 |
| Radial Runout of Tracks
|
um |
<=70
|
Pre-formatted
Characteristics |
Track Pitch |
um |
0.74
+- 0.01 |
| Velocity (for Writing)
|
m/s |
3.49
- 8.44 |
Push-Pull Signal
(before recording) |
- |
0.28
-0.56 |
Optical
|
Reflectivity |
% |
18 -
30 |
| Refraction Index |
- |
1.55
+ - 0.10 |
| Birefringence |
nm |
<=60 |
Write & Read
Characteristics |
Write Power Ppo |
mW |
8 - 15 |
Modulation Amplitude
I14/I14H
|
- |
>=
0.60 |
| Jitter |
% |
<=
9.0 |
| PI Errors |
count
/
8ECC Blocks |
<=280
|
Operating
Environment |
Temperature (for Writing) |
degC |
50- 55 |
Relative Humidity
(for Writing) |
%RH |
3 -
85(1-30g/m3) |
| Temperature (for Reading) |
degC |
5-55 |
Relative Humidity
(for Reading)
|
%RH |
3 -85(1-30g/m3)
|
| For further information, please contact |
| Sales Promote Dept., |
| Mitsubishi Chemical Media Co., Ltd |
| Tel: [+81] 3-3283-3928 |
| Public Relations Dept., |
| Mitsubishi Chemical Corporation |
| Tel: [+81] 3283-6254 |
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