Abstract
A new MO (magneto-optical) disk has been developed as a new memory for digital still cameras, named “iD (image/intelligent disk) PHOTO”. Advantage of the iD PHOTO disk is a larger recording capacity of 730 MB, than those of semiconductor memories on current digital still cameras. The field modulation method for recording and Center Aperture Detection (CAD) type magnetic super resolution for reproducing are employed to achieve this capacity.This disk is designed considering mobile use. For the first point, high field sensitive CAD media is realized so as to reduce electric power consumption. By the addition of the capping layer, the recording field has been reduced to be smaller than 100Oe. For the second point, as well as the mechanical stability, write/read characteristic is enhanced in broad environmental temperature range. More than ±12% read power margin is obtained on each temperature area from -5°C to + 60°C.
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