Kay Schulte-Wieking

tesa ROM and tesa WORM: multilayered optical data storage based on polymer films and using metal island films as tunable absorber system

A new optical data storage medium is introduced. Its cylindrical shape and multi-layer storage allows a storage capacity of ~ 3.5 GByte at a radius and a height of 15 mm. Metal island films are used as a tunable absorber system for multi-layer storage. The proposed absorber system provides high reflection and high absorption for each layer during the writing process. For the reading process the optical properties of each layer can be tuned to appropriate values. Results of a five-layered ROM as well as concept and first results of a five-layered WORM are given.

A new cylindrically shaped optical data storage medium based on adhesive tape-concept and first results

Many efforts have successfully been made in recent years to increase the storage capacities of optical discs from CD/DVD to HD-DVD using blue laser diodes. At the same time many consumer products became smaller and consequently small optical and magneto-optical discs were brought to market. In our search for new materials for optical data storage, we found tesa-film, a conventional adhesive tape, to be suitable for this purpose and in conjunction with a new geometry, our concept offers big advantages in the development of geometrically small write-once memories with a capacity of 3-6 Gbyte: tesa-film is used as a multilayer recording material forming a cheap cylindrically shaped optical data storage medium.