JVC Develops World’s First Single-sided, Dual Layer DVD-RW Disc Technology

Apr 05, 2005
JVC Develops World’s First Single-sided, Dual Layer DVD-RW Disc Technology

Newly Developed High Sensitive Recording Film and a New Writing Method "N-Strategy" to Enhance Erasability Produce Dual Layer DVD-RW Disc 8.5GB Disc for Up to 11 Hours of Video Recording

Victor Company of Japan, Ltd. (JVC) is pleased to announce that it has developed the world’s first single-sided, dual layer DVD-RW disc technology with a maximum storage capacity of 8.5GB. The breakthrough was made possible by the development of a high sensitive recording film, a new recording method "N-Strategy", which enhances erasability, and a proprietary precision thin film forming technology.

The new disc technology delivers 1.8 times the storage capacity of conventional, single-sided, single layer DVD-RW disc with a 4.7GB capacity. Each single-sided, dual layer DVD-RW disc can record up to 11 hours of video without turning over the disc.

JVC has also developed a facing film bonding method that enables mass production of the new discs using conventional manufacturing equipment.

The company’s new disc technology adds rewritable features to single-sided, dual layer DVD discs, which
until now have been limited to write-once capability. JVC predicts that the technology will enjoy widespread
use in applications such as video recorders and optical drives for both mobile and desktop PCs. The company will continue to develop feature enhancements aimed at future commercialization of the technology. JVC will forward a proposal to the DVD Forum in an effort to promote the adoption and advancement of single-sided, dual layer DVD-RW disc technology.

Features of Single-sided, Dual Layer DVD-RW Disc Technology

1. Single-sided, Dual Layer Structure Based on Newly Developed High Sensitive Recording Film, a New Recording Method "N-Strategy", which Enhances Erasability, and Precision Thin Film Forming Technology

Dual layer DVD-RW disc technology utilizes a semi-transparent first recording layer (L0 layer) with excellent transmission performance from the signal read side. With conventional DVD-RW disc technology, the use of a thinner recording layer in order to achieve improved transmission performance results in less laser beam absorption. The resulting drop in laser absorption is insufficient to form and erase marks (recording signal patterns).

The new single-sided, dual layer DVD-RW disc technology makes use of a high sensitive recording film that enables excellent transmission performance and signal rewritability and a new recording method "N-Strategy", which enhances erasability. The high sensitive recording film and “N-Strategy” are based on JVC’s proprietary phase-change design technology developed for high speed DVD-RW discs. Furthermore, JVC employs precision thin film forming technology based on nanotechnology to deliver the world’s first single-sided, dual layer DVD-RW disc technology with an 8.5GB storage capacity.

2. Facing Film Bonding Method for Improved Production Efficiency

JVC has developed a facing film bonding method in which the L1 and L0 recording layers are each formed on separate substrate, but using a different forming order. The recording sides formed on each recording layer are then bonded in an opposed fashion, separated by a space layer. The two recording layers are manufactured as separate processes prior to bonding resulting in improved production efficiency and mass production capability using conventional manufacturing equipment.

Explore further: Drivebot aims to touch driver bases for safety, savings

add to favorites email to friend print save as pdf

Related Stories

Optical data storage has virtually unlimited lifetime

Feb 04, 2014

(Phys.org) —Data stored on today's CDs and DVDs has a lifetime of several decades before the physical material begins to significantly decay. Researchers are working on prolonging the lifetime of stored ...

Probing the inner secrets of nanowires

Dec 13, 2013

(Phys.org) —Semiconductor nanowires (NWs) are vanishingly small: NWs from a recent batch made by scientists in PML's Quantum Electronics and Photonics Division measure about 200 nanometers in diameter (less ...

Caltech engineers invent light-focusing device

Dec 07, 2012

(Phys.org)—As technology advances, it tends to shrink. From cell phones to laptops—powered by increasingly faster and tinier processors—everything is getting thinner and sleeker. And now light beams ...

Recommended for you

Drivebot aims to touch driver bases for safety, savings

1 hour ago

Five Thailand-based engineers have developed a dongle device that serves as a fitness tracker for cars and have turned to Indiegogo to raise funds for bringing it forward. The attraction is that it is a simple ...

HP announces Sprout—a truly innovative workstation

4 hours ago

Hewlett-Packard Co has announced the development of a new kind of computer workstation—one that combines the power of a desktop computer with 3D scanning and projection—and adds a second display surface ...

Q&A: 'Interstellar' filmmaker Nolan on his robots

4 hours ago

In his secrecy-shrouded sci-fi extravaganza "Interstellar," filmmaker Christopher Nolan isn't just taking audiences to outer space. He's also sending a couple of robots along for the ride—and they're just ...

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

Archr
not rated yet Dec 12, 2007
Re: JVC Develops World%u2019s First Single-sided, Dual Layer DVD-RW Disc Technology

All of that is great to know, now where can I buy the disc(s) from?

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.