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JVC 4x single sided dual layer DVD RW disc
Dennis Hissink : January 14th 2006 - 19:00 CET
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JVCJVC 4x single sided dual layer DVD RW disc : Underscoring its expertise in optical disc technologies, JVC today announced the development of the world’s first 4x speed single-sided, dual layer DVD-RW disc technology. Adding the rewritable feature to a single-sided, dual layer disc was made possible by JVC’s development of a high-sensitive recording film, a new recording method that enhances erasability, and a proprietary precision thin film forming technology. JVC also developed a facing film bonding method that enables mass production of the new discs using conventional manufacturing equipment. The breakthrough was first announced in the spring of 2005 for use in producing 2x speed discs.
JVC 4x single sided dual layer DVD RW discJVC dual layer DVD-RW - Disc storage
Those discs will be available in the second quarter of this year. No timetable has been announced for availability of the 4x discs. The higher speed dual layer DVD-RW discs will be ideal for PC use, where higher speed recording is preferred, and for use in DVD recorders when dubbing from a hard disc drive to disc. JVC’s dual layer DVD-RW disc technology utilizes a semi-transparent first recording layer (L0 layer) with excellent transmission performance from the signal read side.

JVC single sided DVD-RW dual layer - Nanotechnology
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 drop in laser absorption is insufficient to form and erase marks (recording signal patterns). JVC’s new single-sided, dual layer DVD-RW disc technology makes use of a new high sensitive recording film that allow 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.

JVC DVR RW dual layer - Single sided
In addition, JVC developed a facing film bonding method in which the L1 and L0 recording layers are each formed on a separate substrate, but use 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.

About JVC Company of America
JVC Company of America, headquartered in Wayne, New Jersey, is a division of JVC Americas Corp., a wholly-owned subsidiary of Victor Company of Japan Ltd., and a holding company for JVC companies located in North and South America. JVC distributes a complete line of video and audio equipment, including high definition displays, camcorders, VCRs, D-VHS recorders, DVD players and recorders, satellite systems, home and portable audio equipment, mobile entertainment products and recording media.

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