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| May 21, 2009 |
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World First!
Organic Dye Recording Layer Recordable Blu-ray Disc
6X Speed BD-R LTH TYPE Development / Production |
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| Mitsubishi Kagaku Media Co., Ltd. |
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Mitsubishi Kagaku Media Co., Ltd., (Head Office: Minato-ku, Tokyo, President: Shigenori Ohtsuka) has developed a recordable Blu-ray disc with an organic dye layer. The 6X Speed BD-R LTH TYPE 25GB disc received official certification from the test center at the end of April and Mitsubishi Kagaku Media is proceeding with preparations for production and shipping from this summer.
The 6X BD-R LTH TYPE has improved the 2X BD-R LTH TYPE recording layer azo dye to the 6X speed level and greatly increased the recording sensitivity*1 and servo characteristics*2. For light resistance and playback durability characteristics also, Mitsubishi Kagaku Media has secured better than recordable DVD reliability characteristics so that recording and multiple playing can be enjoyed without concern. An organic dye is also used in the recording layer of CD-R and DVD-/+R, which together have a demand of more than 10 billion discs a year*3 so the stability and reliability of an organic dye recording film layer has been proven with actual results over the course of the 10 years since the start of CD-R sales.
Also, it is possible to convert CD-R and DVD-/+R production equipment to manufacture BD-R LTH TYPE discs so in response to a future rapid increase in demand for BD discs price merits due to active increases in production and cost reduction are forecast. Mitsubishi Kagaku Media is not only better able to make effective use of this production equipment but also, through utilization of a spin coating method*4 for organic dye application onto the recording layer coating, to improve the recycling of raw materials in the manufacturing process and enable better effective use of resources.
Having the technological power of the Mitsubishi Chemical Group, behind it, the discs are especially resistant to scratching, dirt, fingerprints and other environmental hazards. They are easy to wipe clean, have a high reliability hard coat*5 and a cover layer*6 with an actual surface smoothness on the order of one one-hundredth of a micron.
Mitsubishi Kagaku Media will continue to speed-up the development of improvements in the BD-R LTH TYPE organic dye use discs and will realize further advances in recording and speed.
The Mitsubishi Kagaku Media/Verbatim Group aims to become a recording media company that continues to create new values demanded by the time.
| *1: |
The laser power value required for recording. If the recording sensitivity is high the amount of power the laser requires is reduced. |
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following capability of light pick-up head |
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According to the Japan Recording-Media Industries Association, the 2008 predicted actual demand for CD-R and recordable DVD discs will be greater than 6.4 billion and 5.8 billion discs, respectively. |
| *4: |
The liquid organic dye is dripped onto the substrate while the disc is rotated at high speed and the dye is evenly distributed by the spinning action. The dye that is spun off is recycled. |
| *5: |
This is the several micron thick resin BD cover layer protecting the laser beam writing surface. |
| *6: |
The BD laser entrance face thickness is a 100 micron thick resin film. Highly precise uniform film thickness and flatness is demanded. |
[Terminology: Low to High (LTH)]
A laser beam causes the chemical and physical changes in the nature of the recording layer where it hits when recording data onto the BD-R. The data can be read utilizing the difference in optical reflectance between those sections that are changed and those that aren't. This has been designated as being LTH TYPE (Low to High: LTH), since the use of organic dyes in the recording film of the BD-R causes the reflectance of the disc after recording to change from a low to high reflectance.
[Features of the Mitsubishi Kagaku Media Recordable 2x BD-R LTH TYPE]
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Use of the highly reliable AZO organic dye in its recording film. |
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Cover layer created by spin coating method, which ensures a uniform thickness and a flat and smooth surface. |
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A hard coat that protects the recording surface and prevents damage from dust, scratches, or fingerprints. |
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Mastering (creating a master) technology, which creates a track pitch 57% narrower than that of a DVD. |
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Injection molding technology, which creates an accurate copy of the stamper (master). |
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High level of quality control to achieve stable recording and playback |
| For further information, please contact |
Yukana Yamashita
Mitsubishi Kagaku Media Co., Ltd. |
Tel: [+81] 3-5484-3972
Fax: [+81] 3-5484-8224
URL: http://www.mcmedia.co.jp
Check our website for product details. |
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Public Relations and Investor Relations Department
Mitsubishi Chemical Corporation |
| Tel: [+81] 3-6414-3730 |
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| Consumer contact |
Customer Service
Mitsubishi Kagaku Media Co., Ltd. |
| Toll free Tel: 0120-34-4160 (Japan only) |
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