Fluorescent multi-layer disc (FMD) is a new optical data storage technology that stores digital data in three dimensions across multiple layers, similar in size to CDs and DVDs but with much higher storage capacity of up to 50GB+. FMD works on the phenomenon of photochromism to obtain fluorescent properties from the fluorescent material used and allows for parallel reading and writing across layers at speeds of up to 1GB/sec. FMD provides advantages over traditional optical discs like CDs and DVDs such as greater storage capacity, faster access, and compatibility with existing formats while avoiding the interference issues of coherent light used in other technologies.

1. A Presentation On Fluorescent Multi-Layer Disc Guided By Presented By Mr. Prahlad Kumawat Rahul Kumar Mahaych SRI BALAJI COLLEGE OF ENGG. & TECH.

2. WHAT IS FMD? Fluorescent Multilayer disc is a new technology developed by Constellation 3D Inc. It stores digital data in three dimensions. It is a readable and re-writable disc. It is an optical data storage disc, simialar in size CD-ROMs And DVDs.

3. NEED OF FMD? Increased disc Capacity Quick parallel access and retrieval information. Media tolerances. Usage Flexibility .

4. OPERATING PRINCIPLE The FMDs are works on the phenomenon of PHOTOCHROMISM . The selection of fluorescent material. Obtain fluorescent properties. Simulation and Emission. Filteration and Finish.

5. Model of FMDs

6. TECHNOLOGICAL PROCESS OF MANUFACTURE HOT STAMPING:- Pressing of sheets. Formation of layer. Filling the pits. Pressing of informational layers.

7. Technology Used:- WORM(Write Once Read Many) Two Rules to be followed while recording. The write laser should able to turn the fluorescense on or off Threshold power of laser for recording and less power for reading FMD RECORDING

8. FMD READ DEVICE Reading process is carried out with the help of a photosensitive element. Device can read low-power fluorescense of 10 MHz. Reading speed upto 1GB/sec. Mechanical speed of the derive is 450 times lower than that of DVD.

9. CD-ROM Vs FMD

10. COMPRASION OF DISC LAYERS

11. CD vs DVD vs FMD PARAMETERS CD DVD FMD 1.Disc Diameter 1.2mm 1.2mm 1.2mm 2.Capacity 750MB 4GB 50GB+ 3.Wavelength 780nm 650nm 480-530nm 4. Distance b/w Tracks 1.6micron 0.85micron 0.80micron 5.No.of layers 1 2 12

12. APPLICATIONS Data warehouses. E-commerce related data mining. Storage of very high detailed archive of maps. PVR (Priya Village Roadshow), HDTV. Ability to store a large amount of data in uncompressed format.

13. ADVANTAGES Prevents problem of interference since it uses an incoherent fluorescent light. Compatible with CD and DVD formats with more storage area and faster access. Fluorescent technology do not require special manufacturing conditions. Cost of production of FMD is relatively cheap. It consists multiple data layers, Capacity of each data layer is 4.7 GB

14. REFERENCES www.en.wikipedia.org/wiki. www.seminartopic.org. www.edu.five.org

15. CONCLUSION Man’s need for additional storage space is increasing . The FMD Digital Cinema disc has the potential to provide a secure, removable, single disc distribution method. The FMD can provide us with a staggering 140 GB of storage space seems to be an enticing solution for the storage- hungry masses.

16. Thank You

17. QURIES