Write-Once Blu-ray Discs feature 4x writing speed.

Press Release Summary:

Available Write-Once Blu-ray Discs (BD-R) include single-sided, single layer LM-BR25LDE with 25 GB capacity and single-sided, dual-layer LM-BR50LDE with 50 GB capacity. Both feature 4x read/write speed capability, handle HD content, and offer max data transfer speed of 144 Mbps. Latter is accomplished by application of phase-change recording technology, which promotes precise and stable operation even at lower speeds of 36 Mbps (1x) and 72 Mbps (2x).

Original Press Release:

Panasonic to Introduce World's First 4x Write-Once Blu-ray Discs

SECAUCUS, N.J., July 3 -- Panasonic, the leading brand by which Matsushita Electric Industrial Co., Ltd. is known, announced today that the company will globally introduce Write-Once Blu-ray Discs (BD-R) with 4x writing speed.

The new discs will be available in both 25GB and 50GB, which will be introduced in the market this July and September respectively.
  Model Number                Specification                 Market Launch

LM-BR25LDE Write once, 25GB, Single-Sided, Single July, 2007

LM-BR50LDE Write once, 50GB, Single-Sided, Dual September, 2007

In conjunction with the launch of 4x BD drives, the new discs have the capability of 4x speed writing and reading, allowing users to handle large amount of data or High Definition content with greater convenience. Panasonic is the first company to announce the market introduction of 4x BD-R Discs.* *as of July 3rd, 2007

Since introducing the world's first dual layer 1xBD-RE Disc in 2004, Panasonic has continued to lead the market and develop the Blu-ray Disc technologies to meet the growing demand for high-speed reading and writing of massive volumes of data. The new 4x Discs have the maximum data transfer speed of 144Mbps, which means they can copy a 1GB folder in just one minute, while a DVD-RW(2x data transfer speed) needs 6 minutes. This is achieved by the application of new phase-change recording technology which was realized through Panasonic's 35-years of experience in Optical Disc development. The result is precise and stable recording even when writing at 4x high speed.

Panasonic succeeded in applying this technology to not only single layer Discs but also to dual layer Discs, allowing users to write massive 50GB data at 4x high-speed without turning over the Disc. With its advanced dual-layer technology, Panasonic, which was is the world's first to launch 50GB BD discs with 2x speed, is now bringing the 4x speed model to market as well for the first time in the industry.

Also the newly developed recording layer has a wide power margin at any writing speed from 1x to 4x. This enables high quality recording, even if the drive's laser power fluctuates, resulting in greater overall drive compatibility.

The new Discs offer extremely low error rate thanks to the newly developed film forming technology which minimizes dust generated in the sputtering process. The error rate is reduced to 1/10 that of a conventional Disc, ensuring high reliability and a high quality recording.
Format Name Blu-ray Disc Recordable Format Ver. 1.2
Model Number LM-BR25LDE LM-BR50LDE
Data Capacity 25GB 50GB
Layer Constitution Single Sided/ Single Single Sided/Dual
Layer Layer
Recording Format Phase Change Recordable
Laser Wavelength 405nm (Blue-violet Laser)
Objective Lens
Numerical Aperture (NA) 0.85
Disc Diameter/Thickness 120mm x 1.2mm
Track Pitch 0.32 um
Minimum Mark Length 0.149um
Data Transfer Speed 36Mbps(1x) / 72Mbps(2x) / 144Mbps(4x)
Hard Coating YES

About Panasonic

Best known by its Panasonic brand name, Matsushita Electric Industrial Co., Ltd. is a worldwide leader in the development and manufacture of electronic products for a wide range of consumer, business, and industrial needs. Based in Osaka, Japan, the company recorded consolidated net sales of US$77.19 billion for the year ended March 31, 2007. The company's shares are listed on the Tokyo, Osaka, Nagoya and New York (NYSE:MC) stock exchanges. For more information on the company and the Panasonic brand, visit the company's website at http://panasonic.net/.

CONTACT: Chris De Maria, +1-201-348-7182, demariac@us.panasonic.com, or Jeff Samuels, +1-201-392-4571, samuelsj@us.panasonic.com, both of Panasonic; or Brendan Mullin of Peppercom, +1-212-931-6112, bmullin@peppercom.com, for Panasonic

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